## Contur Plots: Constraints On New Theories Using Rivet

Run Information
Excluding Higgs to WW measurements
Building all available data correlations, combining bins where possible
Building default background model from data, ignoring optional theory predictions (excluding ratios)
Theory uncertainty correlations used.

Parameter values not known for this run.
Combined exclusion for these plots is 100.00 %

## In each analysis pool, these plots contributed:

### Analysis Pool:ATLAS_8_EMETJET

Exclusion from this pool alone: 18.44%

ATLAS_8_EMETJET /ATLAS_2017_I1517194/d95-x01-y01 :

### Analysis Pool:ATLAS_8_EEJET

Exclusion from this pool alone: 17.79%

ATLAS_8_EEJET /ATLAS_2015_I1408516/d15-x01-y01 :

### Analysis Pool:ATLAS_8_JETS

Exclusion from this pool alone: 0.44%

ATLAS_8_JETS /ATLAS_2015_I1394679/d33-x01-y01 :

### Analysis Pool:ATLAS_8_MMETJET

Exclusion from this pool alone: 16.70%

ATLAS_8_MMETJET /ATLAS_2017_I1517194/d94-x01-y01 :

### Analysis Pool:CMS_8_MMETJET

Exclusion from this pool alone: 3.25%

CMS_8_MMETJET /CMS_2016_I1491953/d11-x01-y01 :

### Analysis Pool:ATLAS_8_MMJET

Exclusion from this pool alone: 20.20%

ATLAS_8_MMJET /ATLAS_2015_I1408516/d39-x01-y04 :

### Analysis Pool:CMS_8_LLJET

Exclusion from this pool alone: 2.53%

CMS_8_LLJET /CMS_2017_I1499471/d13-x01-y01 :

### Analysis Pool:ATLAS_8_4L

Exclusion from this pool alone: 0.00%

ATLAS_8_4L /ATLAS_2015_I1394865/d01-x01-y01 :

### Analysis Pool:ATLAS_8_GAMMA

Exclusion from this pool alone: 1.10%

ATLAS_8_GAMMA /ATLAS_2016_I1457605/d02-x01-y01:
ATLAS_8_GAMMA /ATLAS_2016_I1457605/d01-x01-y01:
ATLAS_8_GAMMA /ATLAS_2016_I1457605/d03-x01-y01:
ATLAS_8_GAMMA /ATLAS_2016_I1457605/d04-x01-y01 :

### Analysis Pool:ATLAS_8_HMDY_MU

Exclusion from this pool alone: 6.59%

ATLAS_8_HMDY_MU /ATLAS_2016_I1467454/d36-x01-y01 :

### Analysis Pool:ATLAS_8_WW

Exclusion from this pool alone: 100.00%

ATLAS_8_WW /ATLAS_2016_I1492320/d01-x01-y02 :

### Analysis Pool:CMS_8_JETS

Exclusion from this pool alone: 2.76%

CMS_8_JETS /CMS_2016_I1487277/d02-x01-y01 :

### Analysis Pool:ATLAS_8_GAMMA_MET

Exclusion from this pool alone: 0.00%

ATLAS_8_GAMMA_MET /ATLAS_2016_I1448301/d08-x01-y01 :

### Analysis Pool:ATLAS_8_LLJET

Exclusion from this pool alone: 99.89%

ATLAS_8_LLJET /ATLAS_2014_I1279489/d03-x01-y01 :

### Analysis Pool:ATLAS_8_HMDY_EL

Exclusion from this pool alone: 8.77%

ATLAS_8_HMDY_EL /ATLAS_2016_I1467454/d28-x01-y01 :

### Analysis Pool:ATLAS_8_MM_GAMMA

Exclusion from this pool alone: 4.86%

ATLAS_8_MM_GAMMA /ATLAS_2016_I1448301/d05-x01-y01 :

### Analysis Pool:ATLAS_8_3L

Exclusion from this pool alone: 9.60%

ATLAS_8_3L /ATLAS_2016_I1492320/d01-x01-y01 :

### Analysis Pool:CMS_8_LMETJET

Exclusion from this pool alone: 0.00%

CMS_8_LMETJET /CMS_2017_I1518399/d01-x01-y01 :

### Analysis Pool:ATLAS_8_LMETJET

Exclusion from this pool alone: 7.77%

ATLAS_8_LMETJET /ATLAS_2015_I1397637/d01-x01-y01 :

### Analysis Pool:CMS_8_3L

Exclusion from this pool alone: 99.88%

CMS_8_3L /CMS_2016_I1487288/d04-x01-y01:

### WWW production at 8 TeV (ATLAS_2016_I1492320) in pool ATLAS_8_3L

Inspire | arXiv:1610.05088 [hep-ex]

This paper reports a search for triboson $W^\pm W^\pm W^\mp$ production in two decay channels ($W^\pm W^\pm W^\mp \to \ell^\pm\nu \ell^\pm\nu \ell^\mp\nu$) and ($W^\pm W^\pm W^\mp \to \ell^\pm\nu \ell^\pm\nu jj$ with $\ell = e,\mu$) in proton-proton collision data corresponding to an integrated luminosity of 20.3 fb${}^{-1}$ at a centre-of-mass energy of 8 TeV with the ATLAS detector at the Large Hadron Collider. Events with exactly three charged leptons, or two leptons with the same electric charge in association with two jets, are selected. The total number of events observed in data is consistent with the Standard Model (SM) predictions. The observed 95 % confidence level upper limit on the SM $W^\pm W^\pm W^\mp$ production cross section is found to be 730 fb with an expected limit of 560 fb in the absence of SM $W^\pm W^\pm W^\mp$ production. Limits are also set on $WWWW$ anomalous quartic gauge couplings. Default will make both plots. Use options 2L2J or 3J to make just one.

### H(125) -> 4l at 8 TeV (ATLAS_2014_I1310835) in pool ATLAS_8_4L

Inspire | Phys.Lett. B738 (2014) 234-253 | arXiv:1408.3226 [hep-ex] | doi:10.1016/j.physletb.2014.09.054

Measurements of fiducial and differential cross sections of Higgs boson production in the $H\to ZZ^\ast\to 4\ell$ decay channel are presented. The cross sections are determined within a fiducial phase space and corrected for detection efficiency and resolution effects. They are based on 20.3 fb$^{-1}$ of $pp$ collision data, produced at $\sqrt{s}=8$ TeV centre-of-mass energy at the LHC and recorded by the ATLAS detector. The differential measurements are performed in bins of transverse momentum and rapidity of the four-lepton system, the invariant mass of the subleading lepton pair and the decay angle of the leading lepton pair with respect to the beam line in the four-lepton rest frame, as well as the number of jets and the transverse momentum of the leading jet. The measured cross sections are compared to selected theoretical calculations of the Standard Model expectations. No significant deviation from any of the tested predictions is found.

### Inclusive 4-lepton lineshape (ATLAS_2015_I1394865) in pool ATLAS_8_4L

Inspire | Phys.Lett. B753 (2016) 552-572 | doi:10.1016/j.physletb.2015.12.048 | arXiv:1509.07844 [hep-ex]

The four-lepton (4$\ell$, $\ell = e,\mu$) production cross section is measured in the mass range from 80 to 1000 GeV using 20.3 fb$^{-1}$ of data in $pp$ collisions at $\sqrt{s}=8$ TeV collected with the ATLAS detector at the LHC. The $4\ell$ events are produced in the decays of resonant $Z$ and Higgs bosons and the non-resonant $ZZ$ continuum originating from $q\bar{q}$, $gg$, $qg$ initial states. A total of 476 signal candidate events are observed with a background expectation of 26.2$\pm$3.6 events, enabling the measurement of the integrated cross section and the differential cross section as a function of the invariant mass and transverse momentum of the four-lepton system.

### $Z$ $p_T$ and $Z$ $\phi^*$ (ATLAS_2015_I1408516) in pool ATLAS_8_EEJET

Inspire | arXiv:1512.02192 [hep-ex] | submitted to EPJC

Distributions of transverse momentum $p_\text{T}^{\ell\ell}$ and the angular variable $\phi^\ast_\eta$ of Drell-Yan lepton pairs are measured in $20.3\,\text{fb}^{-1}$ of proton-proton collisions at $\sqrt{s}=8$\,TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects. Compared to previous measurements in proto--proton collisions at i$\sqrt{s}=7$\,TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the $Z$-boson mass peak. Specify the lepton channel (default is Z->ee) by using the LMODE variable. Only individual channels are available as particle-level measurements.

### $k_T$ splittings in $Z$ events at 8 TeV (ATLAS_2017_I1589844) in pool ATLAS_8_EEJET

Inspire | arXiv:1704.01530 [hep-ex] | submitted to JHEP

A measurement of the splitting scales occuring in the $k_\text{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb$^{-1}$ of proton-proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\text{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables. If no mode specified, will try to fill both electron and muon plots. If EL or MU is specified, only the relevant plots will be filled.

### Electroweak $Wjj$ production at 8 TeV (ATLAS_2017_I1517194) in pool ATLAS_8_EMETJET

Inspire | Eur.Phys.J. C77 (2017) no.7, 474 | arXiv:1703.04362 [hep-ex]

Measurements of the electroweak production of a $W$ boson in association with two jets at high dijet invariant mass are performed using $\sqrt{s} = 7$ and 8 TeV proton-proton collision data produced by the Large Hadron Collider, corresponding respectively to 4.7 and 20.2 fb$^{-1}$ of integrated luminosity collected by the ATLAS detector. The measurements are sensitive to the production of a $W$ boson via a triple-gauge-boson vertex and include both the fiducial and differential cross sections of the electroweak process.

### Higgs diphoton events at 8 TeV in ATLAS (ATLAS_2014_I1306615) in pool ATLAS_8_GAMMA

Inspire | arXiv:1407.4222 | JHEP 09 (2014) 112

Measurements of fiducial and differential cross sections are presented for Higgs boson production in proton-proton collisions at a centre-of-mass energy of 8TeV. The analysis is performed in the Higgs diphoton decay channel using 20.3/fb of data recorded by the ATLAS experiment at the CERN Large Hadron Collider. The signal yields are corrected for the effects of detector inefficiency and resolution. Differential cross sections are also presented, as a function of variables related to the diphoton kinematics and the jet activity produced in the Higgs boson events. The observed spectra are statistically limited but broadly in line with the theoretical expectations. Note on reinterpretation: Since the background is subtracted from a fit, any BSM signal would presumably also have beed subtracted. Therefore should not be used to constrain BSM signals unless they comes from a genuine excess of SM Higgs->gammagamma.

### Inclusive prompt photons at 8 TeV (ATLAS_2016_I1457605) in pool ATLAS_8_GAMMA

Inspire | arXiv:1605.03495 [hep-ex]

A measurement of the cross section for the inclusive production of isolated prompt photons in proton-proton collisions at a centre-of-mass energy of $\sqrt{s} = 8$ TeV is presented. The measurement covers the pseudorapidity ranges $|\eta^\gamma| < 1.37$ $1.56 < |\eta^\gamma| < 2.37$ in the transverse energy range $25 < E^\gamma_\text{T} < 1500$ GeV. The results are based on an integrated luminosity of 20.2 fb${}^{-1}$, recorded by the ATLAS detector at the LHC. Photon candidates are identified by combining information from the calorimeters and the inner tracker. The background is subtracted using a data-driven technique, based on the observed calorimeter shower-shape variables and the deposition of hadronic energy in a narrow cone around the photon candidate.

### Inclusive diphoton cross-sections at 8 TeV (ATLAS_2017_I1591327) in pool ATLAS_8_GAMMA

Inspire | arXiv:1704.03839 [hep-ex] | submitted to PRD

A measurement of the production cross section for two isolated photons in proton--proton collisions at a center-of-mass energy of $\sqrt{s}=8$ TeV is presented. The results are based on an integrated luminosity of 20.2 fb$^{-1}$ recorded by the ATLAS detector at the Large Hadron Collider. The measurement considers photons with pseudorapidities satisfying $|\eta^\gamma| < 1.37$ or $1.56 < |\eta^\gamma| < 2.37$ and transverse energies of respectively $E^\gamma_\text{T,1}>40$ GeV and $E^\gamma_\text{T,2}> 30$ GeV for the two leading photons ordered in transverse energy produced in the interaction. The background due to hadronic jets and electrons is subtracted using data-driven techniques. The fiducial cross sections are corrected for detector effects and measured differentially as a function of six kinematic observables. The measured cross section integrated within the fiducial volume is $16.8\pm0.8$ pb. The data are compared to fixed-order QCD calculations at next-to-leading-order and next-to-next-to-leading-order accuracy as well as next-to-leading-order computations including resummation of initial-state gluon radiation at next-to-next-to-leading logarithm or matched to a parton shower, with relative uncertainties varying from 5% to 20%.

### Photon + heavy flavour at 8 TeV (ATLAS_2017_I1632756) in pool ATLAS_8_GAMMA

Inspire | submitted to PLB | arXiv:1710.09560 [hep-ex]

This Letter presents the measurement of differential cross sections of isolated prompt photons produced in association with a $b$-jet or a $c$-jet. These final states provide sensitivity to the heavy-flavour content of the proton and aspects related to the modelling of heavy-flavour quarks in perturbative QCD. The measurement uses proton-proton collision data at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector at the LHC in 2012 corresponding to an integrated luminosity of up to 20.2 fb$^{-1}$. The differential cross sections are measured for each jet flavour with respect to the transverse energy of the leading photon in two photon pseudorapidity regions: $|\eta^\gamma| < 1.37$ and $1.56 < |\eta^\gamma| < 2.37$. The measurement covers photon transverse energies $25 < E^\gamma_\text{T} < 400$ GeV and $25 < E^\gamma_\text{T} < 350$ GeV respectively for the two $|\eta^\gamma|$ regions. For each jet flavour, the ratio of the cross sections in the two $|\eta^\gamma|$ regions is also measured. The measurement is corrected for detector effects and compared to leading-order and next-to-leading-order perturbative QCD calculations, based on various treatments and assumptions about the heavy-flavour content of the proton. Overall, the predictions agree well with the measurement, but some deviations are observed at high photon transverse energies. The total uncertainty in the measurement ranges between 13% and 66%, while the central $\gamma + b$ measurement exhibits the smallest uncertainty, ranging from 13% to 27%, which is comparable to the precision of the theoretical predictions.

### Isolated triphotons at 8 TeV (ATLAS_2017_I1644367) in pool ATLAS_8_GAMMA

Inspire | Phys.Lett. B781 (2018) 55-76 | doi:10.1016/j.physletb.2018.03.057 | arXiv:1712.07291 [hep-ex]

A measurement of the production of three isolated photons in proton-proton collisions at a centre-of-mass energy $\sqrt{s} = 8$ TeV is reported. The results are based on an integrated luminosity of 20.2 fb${}^{-1}$ collected with the ATLAS detector at the LHC. The differential cross sections are measured as functions of the transverse energy of each photon, the difference in azimuthal angle and in pseudorapidity between pairs of photons, the invariant mass of pairs of photons, and the invariant mass of the triphoton system. A measurement of the inclusive fiducial cross section is also reported. Next-to-leading-order perturbative QCD predictions are compared to the cross-section measurements. The predictions underestimate the measurement of the inclusive fiducial cross section and the differential measurements at low photon transverse energies and invariant masses. They provide adequate descriptions of the measurements at high values of the photon transverse energies, invariant mass of pairs of photons, and invariant mass of the triphoton system.

### $Z \gamma (\gamma)$ cross sections at 8 TeV (ATLAS_2016_I1448301) in pool ATLAS_8_GAMMA_MET

Inspire | Phys.Rev. D93 (2016) no.11, 112002 | doi:10.1103/PhysRevD.93.112002 | arXiv:1604.05232 [hep-ex]

The production of $Z$ bosons with one or two isolated high-energy photons is studied using pp collisions at $\sqrt{s}=8$ TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb${}^{-1}$ collected by the ATLAS detector during the 2012 LHC data taking. The $Z\gamma$ and $Z\gamma\gamma$ production cross sections are measured with leptonic ($e^+e^-$, $\mu^+\mu^-$, $\nu\bar{\nu}$) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy $E_\text{T}>250$ GeV from $\ell^+\ell^-\gamma$ events and with $E_\text{T}>400$ GeV from $\nu\bar{\nu}\gamma$ events are used to search for anomalous triple gauge-boson couplings $ZZ\gamma$ and $Z\gamma\gamma$. The yields of events with diphoton invariant mass $m_{\gamma\gamma}>200$ GeV from $\ell^+\ell^-\gamma\gamma$ events and with $m_{\gamma\gamma}>300$ GeV from $\nu\bar{\nu}\gamma\gamma$ events are used to search for anomalous quartic gauge-boson couplings $ZZ\gamma\gamma$ and $Z\gamma\gamma\gamma$. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings. The lepton channel can be specified by using the relevant LMODE (EL, MU, NU, LL). The default plugin will fill all of them with any events passing the cuts. NU will do only the MET channels, EL & MU will do only the electron or muon and will populate the combined plots assuming charged lepton universality. LL with do on the electron and muon but will populate the combined plots with the average of the two.

### High-mass Drell-Yan at 8 TeV (ATLAS_2016_I1467454) in pool ATLAS_8_HMDY_EL

Inspire | JHEP 1608 (2016) 009 | doi:10.1007/JHEP08(2016)009 | arXiv:1606.01736 [hep-ex]

This paper presents a measurement of the double-differential cross section for the Drell-Yan $Z/\gamma^\ast \rightarrow \ell^+\ell^-$ and photon-induced $\gamma\gamma \rightarrow \ell^+\ell^-$ processes where $\ell$ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, $m_{\ell\ell}$, between 116 GeV and 1500 GeV using a sample of 20.3 fb$^{-1}$ of pp collisions data at centre-of-mass energy of $\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of $m_{\ell\ell}$ is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1\% is achieved at low $m_{\ell\ell}$. A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated. Decay channel (e or mu) is selected by LMODE=EL,MU

### High-mass Drell-Yan at 8 TeV (ATLAS_2016_I1467454) in pool ATLAS_8_HMDY_MU

Inspire | JHEP 1608 (2016) 009 | doi:10.1007/JHEP08(2016)009 | arXiv:1606.01736 [hep-ex]

This paper presents a measurement of the double-differential cross section for the Drell-Yan $Z/\gamma^\ast \rightarrow \ell^+\ell^-$ and photon-induced $\gamma\gamma \rightarrow \ell^+\ell^-$ processes where $\ell$ is an electron or muon. The measurement is performed for invariant masses of the lepton pairs, $m_{\ell\ell}$, between 116 GeV and 1500 GeV using a sample of 20.3 fb$^{-1}$ of pp collisions data at centre-of-mass energy of $\sqrt{s} = 8$ TeV collected by the ATLAS detector at the LHC in 2012. The data are presented double differentially in invariant mass and absolute dilepton rapidity as well as in invariant mass and absolute pseudorapidity separation of the lepton pair. The single-differential cross section as a function of $m_{\ell\ell}$ is also reported. The electron and muon channel measurements are combined and a total experimental precision of better than 1\% is achieved at low $m_{\ell\ell}$. A comparison to next-to-next-to-leading order perturbative QCD predictions using several recent parton distribution functions and including next-to-leading order electroweak effects indicates the potential of the data to constrain parton distribution functions. In particular, a large impact of the data on the photon PDF is demonstrated. Decay channel (e or mu) is selected by LMODE=EL,MU

### Multijets at 8 TeV (ATLAS_2015_I1394679) in pool ATLAS_8_JETS

Inspire | arXiv:1509.07335 [hep-ex]

Differential cross sections for the production of at least four jets have been measured in proton-proton collisions at $\sqrt{s}=8$\,TeV at the Large Hadron Collider using the ATLAS detector. The dataset corresponds to an integrated luminosity of 20.3\,fb^{-1}. The cross sections are corrected for detector effects and presented as a function of the jet momenta, invariant masses, minimum and maximum opening angles and other kinematic variables.

### ATLAS Inclusive jet cross section measurement at sqrt(s)=8TeV (ATLAS_2017_I1604271) in pool ATLAS_8_JETS

Inspire | JHEP 09 (2017) 020 | arXiv:1706.03192

Inclusive jet production cross-sections are measured in proton-proton collisions at a centre-of-mass energy of $\sqrt{s}=8$ TeV recorded by the ATLAS experiment at the Large Hadron Collider at CERN. The total integrated luminosity of the analysed data set amounts to 20.2 fb$^{-1}$. Double-differential cross-sections are measured for jets defined by the anti-$k_\text{t}$ jet clustering algorithm with radius parameters of $R=0.4$ and $R=0.6$ and are presented as a function of the jet transverse momentum, in the range between 70 GeV and 2.5 TeV and in six bins of the absolute jet rapidity, between 0 and 3.0. The measured cross-sections are compared to predictions of quantum chromodynamics, calculated at next-to-leading order in perturbation theory, and corrected for non-perturbative and electroweak effects. The level of agreement with predictions, using a selection of different parton distribution functions for the proton, is quantified. Tensions between the data and the theory predictions are observed.

### Measurements of electroweak production of dijets + $Z$ boson, and distributions sensitive to vector boson fusion (ATLAS_2014_I1279489) in pool ATLAS_8_LLJET

Inspire | JHEP 1404 (2014) 031 | arXiv:1401.7610 [hep-ex]

Measurements differential distributions for inclusive $Z$-boson-plus-dijet production are performed in five fiducial regions, each with different sensitivity to the electroweak contribution. Measured distributions include the differential cross section as a function of the dijet invariant mass, the differential cross section and a function of the dijet rapidity separation, the differential cross section as a function of the number of jets in the rapidity interval bounded by the two leading jets. Other measurements include the jet veto effiency as a function of the dijet invariant mass and rapdity separation, the normalized transverse momentum balance cut efficiency, and the average number of jets falling into the rapidity interval boundd by the two leading jets, as a function of dijet invariant mass and dijet rapidity separation.

### Boosted ttbar differential cross-section (ATLAS_2015_I1397637) in pool ATLAS_8_LMETJET

Inspire | Phys.Rev. D93 (2016) no.3, 032009 | doi:10.1103/PhysRevD.93.032009 | arXiv:1510.03818 [hep-ex]

The differential cross-section for pair production of top quarks with high transverse momentum is measured in 20.3fb${}^{-1}$ of proton-proton collisions at a center-of-mass energy of 8 TeV. The measurement is performed for $t\bar{t}$ events in the lepton+jets channel. The cross-section is reported as a function of the hadronically decaying top quark transverse momentum for values above 300 GeV. The hadronically decaying top quark is reconstructed as an anti-$k_\text{t}$ jet with radius parameter $R=1.0$ and identified with jet substructure techniques. The observed yield is corrected for detector effects to obtain a cross-section at particle level in a fiducial region close to the event selection.

### $Z \gamma (\gamma)$ cross sections at 8 TeV (ATLAS_2016_I1448301) in pool ATLAS_8_MM_GAMMA

Inspire | Phys.Rev. D93 (2016) no.11, 112002 | doi:10.1103/PhysRevD.93.112002 | arXiv:1604.05232 [hep-ex]

The production of $Z$ bosons with one or two isolated high-energy photons is studied using pp collisions at $\sqrt{s}=8$ TeV. The analyses use a data sample with an integrated luminosity of 20.3 fb${}^{-1}$ collected by the ATLAS detector during the 2012 LHC data taking. The $Z\gamma$ and $Z\gamma\gamma$ production cross sections are measured with leptonic ($e^+e^-$, $\mu^+\mu^-$, $\nu\bar{\nu}$) decays of the Z boson, in extended fiducial regions defined in terms of the lepton and photon acceptance. They are then compared to cross-section predictions from the Standard Model, where the sources of the photons are radiation off initial-state quarks and radiative Z-boson decay to charged leptons, and from fragmentation of final-state quarks and gluons into photons. The yields of events with photon transverse energy $E_\text{T}>250$ GeV from $\ell^+\ell^-\gamma$ events and with $E_\text{T}>400$ GeV from $\nu\bar{\nu}\gamma$ events are used to search for anomalous triple gauge-boson couplings $ZZ\gamma$ and $Z\gamma\gamma$. The yields of events with diphoton invariant mass $m_{\gamma\gamma}>200$ GeV from $\ell^+\ell^-\gamma\gamma$ events and with $m_{\gamma\gamma}>300$ GeV from $\nu\bar{\nu}\gamma\gamma$ events are used to search for anomalous quartic gauge-boson couplings $ZZ\gamma\gamma$ and $Z\gamma\gamma\gamma$. No deviations from Standard Model predictions are observed and limits are placed on parameters used to describe anomalous triple and quartic gauge-boson couplings. The lepton channel can be specified by using the relevant LMODE (EL, MU, NU, LL). The default plugin will fill all of them with any events passing the cuts. NU will do only the MET channels, EL & MU will do only the electron or muon and will populate the combined plots assuming charged lepton universality. LL with do on the electron and muon but will populate the combined plots with the average of the two.

### Electroweak $Wjj$ production at 8 TeV (ATLAS_2017_I1517194) in pool ATLAS_8_MMETJET

Inspire | Eur.Phys.J. C77 (2017) no.7, 474 | arXiv:1703.04362 [hep-ex]

Measurements of the electroweak production of a $W$ boson in association with two jets at high dijet invariant mass are performed using $\sqrt{s} = 7$ and 8 TeV proton-proton collision data produced by the Large Hadron Collider, corresponding respectively to 4.7 and 20.2 fb$^{-1}$ of integrated luminosity collected by the ATLAS detector. The measurements are sensitive to the production of a $W$ boson via a triple-gauge-boson vertex and include both the fiducial and differential cross sections of the electroweak process.

### $Z$ $p_T$ and $Z$ $\phi^*$ (ATLAS_2015_I1408516) in pool ATLAS_8_MMJET

Inspire | arXiv:1512.02192 [hep-ex] | submitted to EPJC

Distributions of transverse momentum $p_\text{T}^{\ell\ell}$ and the angular variable $\phi^\ast_\eta$ of Drell-Yan lepton pairs are measured in $20.3\,\text{fb}^{-1}$ of proton-proton collisions at $\sqrt{s}=8$\,TeV with the ATLAS detector at the LHC. Measurements in electron-pair and muon-pair final states are corrected for detector effects. Compared to previous measurements in proto--proton collisions at i$\sqrt{s}=7$\,TeV, these new measurements benefit from a larger data sample and improved control of systematic uncertainties. Measurements are performed in bins of lepton-pair mass above, around and below the $Z$-boson mass peak. Specify the lepton channel (default is Z->ee) by using the LMODE variable. Only individual channels are available as particle-level measurements.

### $k_T$ splittings in $Z$ events at 8 TeV (ATLAS_2017_I1589844) in pool ATLAS_8_MMJET

Inspire | arXiv:1704.01530 [hep-ex] | submitted to JHEP

A measurement of the splitting scales occuring in the $k_\text{t}$ jet-clustering algorithm is presented for final states containing a $Z$ boson. The measurement is done using 20.2 fb$^{-1}$ of proton-proton collision data collected at a centre-of-mass energy of $\sqrt{s} = 8$ TeV by the ATLAS experiment at the LHC in 2012. The measurement is based on charged-particle track information, which is measured with excellent precision in the $p_\text{T}$ region relevant for the transition between the perturbative and the non-perturbative regimes. The data distributions are corrected for detector effects, and are found to deviate from state-of-the-art predictions in various regions of the observables. If no mode specified, will try to fill both electron and muon plots. If EL or MU is specified, only the relevant plots will be filled.

### WW production at 8 TeV (ATLAS_2016_I1426515) in pool ATLAS_8_WW

Inspire | JHEP 1609 (2016) 029 | doi:10.1007/JHEP09(2016)029 | arXiv:1603.01702 [hep-ex]

The production of $W$ boson pairs in proton--proton collisions at $\sqrt{s} = 8$ TeV is studied using data corresponding to 20.3 fb${}^{-1}$ of integrated luminosity collected by the ATLAS detector during 2012 at the CERN Large Hadron Collider. The $W$ bosons are reconstructed using their leptonic decays into electrons or muons and neutrinos. Events with reconstructed jets are not included in the candidate event sample. A total of 6636 $WW$ candidate events are observed. Measurements are performed in fiducial regions closely approximating the detector acceptance. The integrated measurement is corrected for all acceptance effects and for the $W$ branching fractions to leptons in order to obtain the total $WW$ production cross section, which is found to be $71.1 \pm 1.1$ (stat) ${}^{+5.7}_{-5.0}$ (syst) $\pm 1.4$ (lumi) pb. This agrees with the next-to-next-to-leading-order Standard Model prediction of $63.2 {}^{+1.6}_{-1.4}$ (scale) $\pm 1.2$ (PDF) pb. Fiducial differential cross sections are measured as a function of each of six kinematic variables. The distribution of the transverse momentum of the leading lepton is used to set limits on anomalous triple-gauge-boson couplings.

### WWW production at 8 TeV (ATLAS_2016_I1492320) in pool ATLAS_8_WW

Inspire | arXiv:1610.05088 [hep-ex]

This paper reports a search for triboson $W^\pm W^\pm W^\mp$ production in two decay channels ($W^\pm W^\pm W^\mp \to \ell^\pm\nu \ell^\pm\nu \ell^\mp\nu$) and ($W^\pm W^\pm W^\mp \to \ell^\pm\nu \ell^\pm\nu jj$ with $\ell = e,\mu$) in proton-proton collision data corresponding to an integrated luminosity of 20.3 fb${}^{-1}$ at a centre-of-mass energy of 8 TeV with the ATLAS detector at the Large Hadron Collider. Events with exactly three charged leptons, or two leptons with the same electric charge in association with two jets, are selected. The total number of events observed in data is consistent with the Standard Model (SM) predictions. The observed 95 % confidence level upper limit on the SM $W^\pm W^\pm W^\mp$ production cross section is found to be 730 fb with an expected limit of 560 fb in the absence of SM $W^\pm W^\pm W^\mp$ production. Limits are also set on $WWWW$ anomalous quartic gauge couplings. Default will make both plots. Use options 2L2J or 3J to make just one.

### $WZ$ production cross-section in $pp$ collisions at 8 TeV (CMS_2016_I1487288) in pool CMS_8_3L

Inspire | Eur.Phys.J. C77 (2017) no.4, 236 | DOI:10.1140/epjc/s10052-017-4730-z | CMS-SMP-14-014 | CERN-EP-2016-205 | arXiv:1609.05721

Fully leptonic $WZ$ diboson production at the CMS experiment, measured inclusively at 7 and 8 TeV, and differentially at 8 TeV only (this analysis). The differential cross-sections are measured with respect to $Z$ $p_T$, leading jet $p_T$, and the jet multiplicity. This data is useful for constraining MC models of QCD and EW activity in diboson events, and for constraining anomalous couplings. NOTE: total cross-section is fixed to the measured value in this analysis, since the correction factors from fiducial to inclusive $WZ$ production were not published.

### Measurement and QCD analysis of double-differential inclusive jet cross sections in pp collisions at $\sqrt{s} = 8\;\text{TeV}$ and cross section ratios to 2.76 and 7 TeV (CMS_2016_I1487277) in pool CMS_8_JETS

Inspire | DOI:10.1007/JHEP03(2017)156 | arXiv:1609.05331 | CMS-SMP-14-001

A measurement of the double-differential inclusive jet cross section as a function of the jet transverse momentum $\pt$ and the absolute jet rapidity $\abs{y}$ is presented. Data from LHC proton-proton collisions at $\sqrt{s}=8\text{TeV}$, corresponding to an integrated luminosity of 19.7 fb^{-1}, have been collected with the CMS detector. Jets are reconstructed using the anti-$\kt$ clustering algorithm with a size parameter of 0.7 in a phase space region covering jet $\pt$ from $74\text{GeV}$ up to $2.5\text{TeV}$ and jet absolute rapidity up to $\abs{y}=3.0$. The low-$\pt$ jet range between 21 and $74\text{GeV}$ is also studied up to $\abs{y}=4.7$, using a dedicated data sample corresponding to an integrated luminosity of 5.6\pbinv. The measured jet cross section is corrected for detector effects and compared with the predictions from perturbative QCD at next-to-leading order (NLO) using various sets of parton distribution functions (PDF). Cross section ratios to the corresponding measurements performed at 2.76 and $7\text{TeV}$ are presented. From the measured double-differential jet cross section, the value of the strong coupling constant evaluated at the $\PZ$ mass is $\alpha_\mathrm{S}(M_{\PZ}) = 0.1164^{+0.0060}_{-0.0043}$, where the errors include the PDF, scale, nonperturbative effects and experimental uncertainties, using the CT10 NLO PDFs. Improved constraints on PDFs based on the inclusive jet cross section measurement are presented.

### Measurements of the associated production of a Z boson and b jets in pp collisions at $\sqrt{s} = 8$ TeV (CMS_2017_I1499471) in pool CMS_8_LLJET

Inspire | DOI:10.1140/epjc/s10052-017-5140-y | arXiv:1611.06507 | CMS-SMP-14-010

Measurements of the associated production of a Z boson with at least one jet originating from a b quark in proton-proton collisions at $\sqrt{s} = 8$ TeV are presented. Differential cross sections are measured with data collected by the CMS experiment corresponding to an integrated luminosity of 19.8 $\text{fb}^{-1}$. Z bosons are reconstructed through their decays to electrons and muons. Cross sections are measured as a function of observables characterizing the kinematics of the b jet and the Z boson. Ratios of differential cross sections for the associated production with at least one b jet to the associated production with any jet are also presented. The production of a Z boson with at least two b jets is investigated, and differential cross sections are measured for the dijet system. Results are compared to theoretical predictions, testing two different flavour schemes for the choice of initial-state partons. Note of the authors: the Z boson selection and b-tagging algorithms used in the code are based on standard Rivet code and do not exactly coincide with those used in the paper. They anyway reproduce the paper results at the percent level or better for most of the bins.

### Boosted $t\bar{t}$ in $pp$ collisions at $\sqrt{s} = 8 \text{TeV}$ (CMS_2016_I1454211) in pool CMS_8_LMETJET

Inspire | CMS-PAS-TOP-14-012 (PAS) | CERN-EP-2016-078 (paper)

The cross section for pair production of top quarks with high transverse momenta ($p_\mathrm{T} > 400$ \text{GeV}) is measured in 19.7 fb$^{-1}$ of $\mathrm{pp}$ collisions, collected with the CMS detector at $\sqrt{s} = 8 \text{TeV}$. The measurement is performed for lepton+jets events, where one top quark decays according to $t \rightarrow Wb \rightarrow \ell \nu b$, with $\ell$ denoting an electron or muon, and the second top quark decays to an hadronic final state and is reconstructed as a single large-radius jet and identified as a top quark candidate using jet substructure techniques. Integrated cross sections, as well as differential cross sections as a function of the top quark $p_\mathrm{T}$ and rapidity, are measured both at particle level within a fiducial region resembling the detector-level selections and at parton level. RIVET: This analysis is to be run on $t\bar{t}$ Monte Carlo. It utilizes the PartonicTops projection, which assumes top quarks in the event record. The analysis has been validated with Powheg+Pythia6. The parton-level phase space is defined by requiring two PartonicTops. Exactly one PartonicTop must decay directly to a muon or electron (no intermediate tau), and exactly one PartonicTop decays hadronically. For $t\bar{t}$ Monte Carlo, this is equivalent to requiring the event to be semileptonic at parton level. The parton-level top quark is defined as the hadronically decaying top. The parton-level top quark is required to have $p_\mathrm{T} > 400 \text{GeV}$. The particle-level phase space is defined using the following object definitions: - Lepton: A dressed electron or muon, meaning the lepton has been clustered with all photons within a cone of $R=0.1$. The DressedLepton projection is used to construct the dressed lepton. The lepton is required to have $p_\mathrm{T} > 45$ GeV and $|\eta| < 2.1$. - B Jet Candidate: Gen AK5 jets are formed by clustering the final state particles in the event using the anti-$k_{T}$ algorithm with distance parameter $R=0.5$. Neutrinos are excluded from the clustering, as are any particles included in the dressed lepton. The gen AK5 jet is required to have $p_{T} > 30$ GeV and $|\eta| < 2.4$. Gen AK5 jets in the same hemisphere as the lepton ($\Delta R(e/\mu, \mathrm{jet}) < \pi/2$) are defined as $b$-jet candidates. - Top Jet Candidate: Gen CA8 jets are formed by clustering the final state particles in the event using the Cambridge-Aachen algorithm with distance parameter $R=0.8$. Neutrinos are excluded from the clustering, as are any particles included in the dressed lepton. The gen CA8 jet is required to have $p_{T} > 30$ GeV and $|\eta| < 2.4$. Gen CA8 jets which have $p_{T} > 400$ GeV, 140 GeV $<$ mass $<$ 250 GeV, and are in the opposite hemisphere from the lepton ($\Delta{\rm R(e/\mu, jet)} > \pi/2$) are defined as top jet candidates. The particle-level phase space is defined by requiring $\geq 1$ b jet candidate, $\geq 1$ top jet candidate, and exactly one lepton. This is in addition to the parton-level semileptonic requirement. The highest-$p_\mathrm{T}$ top jet candidate is defined as the particle-level $t$ jet.

### Differential $t\bar{t}$ production cross-section as a function of the leading jet mass for boosted top quarks at 8 TeV (CMS_2017_I1518399) in pool CMS_8_LMETJET

Inspire | TOP-15-015 | arXiv:1703.06330 | Submitted to Eur. Phys. J. C.

Measurement of the differential and normalised differential $t\bar{t}$ production cross section as a function of the leading jet mass. The measurement was performed in the lepton+jets channel and the fiducial measurement phase space is enriched with events where the leading jet includes all decay products of a hadronically decaying top quark. This analysis is to be run on ${t\bar{t}}$ simulation. The objects are defined as follows - Lepton: electron or muon originating from the decay of a W boson - Jets: jets are clustered from final state particles using the Cambridge-Aachen algorithm with a distance parameter of 1.2. If a lepton overlaps with a jet (distance in the eta-phi plane smaller 1.2) its four momentum is subtracted from the four momentum of the jet. Definition of the particle level phase space: - only ${\rm t\bar{t}}$ decays with one top quark decaying hadronically and one top quark decaying leptonically including an electron or muon from the W decay. - lepton $\pt > 45\;\text{GeV}$ and $|\eta| < 2.1$ - at least one jet with $\pt > 400\;\text{GeV}$ and $|\eta| < 2.5$ - a second jet with $\pt > 150\;\text{GeV}$ and $|\eta| < 2.5$ - veto on additional jets with $\pt > 150\;\text{GeV}$ and $|\eta| < 2.5$ - distance between the second jet and the lepton in the eta-phi plane $\Delta R(jet2, lepton)$ smaller 1.2 - invariant mass of the leading jet larger than the invariant mass of the combination of the second jet and lepton The differential and normalised differential cross section was measured as a function of the leading jet mass.

### Differential cross sections for associated production of a W boson and jets at 8 TeV (CMS_2016_I1491953) in pool CMS_8_MMETJET

Inspire | Phys.Rev. D95 (2017) 052002 | doi:10.1103/PhysRevD.95.052002 | arXiv:1610.04222 | CMS-SMP-14-023

Differential cross sections for a W boson produced in association with jets are measured in a data sample of proton-proton collisions at a center-of-mass energy of 8 TeV recorded with the CMS detector and corresponding to an integrated luminosity of 19.6 inverse femtobarns. The W bosons are identified through their decay into a muon and a neutrino. The cross sections are reported as functions of jet multiplicity, jet transverse momenta, and the scalar sum of jet transverse momenta ($H_T$) for different jet multiplicities. Distributions of the angular correlations between the jets and the muon are examined, as well as the average number of jets as a function of $H_T$ and as a function of angular variables. The cross sections are measured in the fiducial region defined by a muon with $p_T > 25$ GeV and pseudorapidity $|\eta| < 2.1$, and by a transverse mass between the muon and the missing transverse energy $M_T > 50$ GeV. Jets are reconstructed using the anti-kT algorithm with a distance parameter R = 0.5, and only jets with $p_T > 30$ GeV, $|\eta| < 2.4$, and a separation of $\Delta R > 0.5$ from the muon are considered.

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