# UCL HEP Seminars

Seminars are generally held at 4pm on Fridays in room A1 on the top floor of the physics department

A calendar of all seminars in the Physics Department is available on the Physics Events Calendar page.
If you use Google Calendar or similar, such as Apple iCal, it is possible to subscribe to this calendar via: XML, ICAL or HTML.

Please send suggestions for topics and/or speakers to Linda Cremonesi and Andreas Korn.

## Upcoming Seminars

26-10-2018 : Eram Rizvi (QMUL)

Precision EW Measurements from ATLAS - sin^2\theta_eff

The phenomenal operation of the LHC in Run-1 has allowed high precision measurements to be attained for single vector boson production in pp collisions. A new measurement of the cross section for Z\gamma production at \sqrt{s}=8 TeV will be presented triple differentially in dilepton invariant mass, |y| and \cos\theta covering the region 46$<$m$<$200 GeV; 0$<|y|<$3.6; and -1$<$cos\theta$<$+1. The measurement is designed to be simultaneously sensitive to the proton PDFs and to the weak mixing angle. A precision of better than 0.5% in the region m ~ mZ (excluding luminosity uncertainty) is achieved. The value of sin^2\theta_eff is extracted using this cross section data, and also using the approach of scattering amplitude coefficients. An accuracy of ±36 x 10^{-5} is achieved reaching the combined CDF+D0 accuracy and approaching the LEP and SLD results.

[slides]

02-11-2018 : Ioana Maris (ULB)

Current status and future of Ultra High Energy Cosmic Rays experiments

The Earth's atmosphere is constantly bombarded by ultra high energy cosmic rays (UHECRs). These particles carry the largest energies known to us: they can reach more than 10²⁰ eV. Their flux is very low, and thus very large detectors were built to be able to detect the secondary particles produced by UHECRs after entering the atmosphere. I will present the results of the forerunner experiments, Pierre Auger Observatory and Telescope Array, regarding the energy spectrum, mass composition and arrival directions. Even though a large progress has been made in the last 10 years, we still do not know where these particles are coming from. In the last part of this talk I will present the future plans to advance in the quest of the origin of UHECRs.

[slides]

09-11-2018 : Jeanne Wilson (QMUL)

SNO+: Current Status and Prospects

The SNO+ experiment is a multi-purpose low energy neutrino experiment based in the SNOLAB deep underground facility in Canada. The experiment builds on the infrastructure of the successful SNO experiment, with liquid scintillator replacing the original heavy water detection medium. The main goal of SNO+ is to search for neutrino-less double beta decay of tellurium-130, which will be dissolved in the liquid scintillator. If observed, neutrino-less double beta decay would confirm the Majorana nature of neutrinos and provide information on absolute neutrino mass. Additionally, SNO+ plans to make measurements of reactor neutrinos, geo-neutrinos, solar neutrinos and will be sensitive to neutrinos from galactic supernovae. For the past year, SNO+ detector commissioning has involved collecting data with H2O as a detection medium, allowing observation of solar neutrinos with extremely low background and a search for invisible modes of nucleon decay, which will be presented in this talk.

[slides]

16-11-2018 : Andi Chisholm (Birmingham)

H->cc

TBC

[slides]