(r53) StefanRichter < Main

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---+ UCL homepage of Stefan Richter

<!-- <span style="background-color: #FFFF00">ANNOUNCEMENTS</span> -->

---++ Contact
| Email | stefan.richter.13@ucl.ac.uk or stefan.richter@cern.ch |
| Skype | arvosana |
| Mobile phone | +44 7547 868536 <br /> +358 50 4952406 (used when in Finland) |
| Room at UCL | C14 |
| Home address |  Room 304, Commonwealth Hall, 1-11 Cartwright Gardens, London !WC1H !9EB |

I also have a <a href=http://blogs.helsinki.fi/szrichte/>personal homepage</a> with a blog and my own <a href=http://blogs.helsinki.fi/szrichte/physics/documents/>physics materials</a>.

---++ My bookmarks
<a href=https://indico.cern.ch/category/1976/>UCL ATLAS meetings</a> <br />
<a href=http://www.hep.ucl.ac.uk/~campanel/Post_Grads/2013-2014/>Postgraduate HEP lectures 2013/14</a> (<a href=http://www.hep.ucl.ac.uk/~campanel/Post_Grads/2013-2014/Timetable1314.pdf>timetable</a>) <br /> <a href=http://www.pp.rhul.ac.uk/~cowan/stat_course.html>Statistics course</a> <br /> <a href=http://hepwww.rl.ac.uk/Haywood/lectures.htm>Symmetries course</a> <br /> <a href=http://www.hep.ucl.ac.uk/seminars/>UCL HEP seminars</a> <br /> <a href=https://twiki.atlas-canada.ca/bin/view/AtlasCanada/Password-lessSsh>Setting up password-less SSH login</a>

---++ Activity log

Activities are grouped by week, starting on the given date. <noautolink>

12/05/2014
   * Preparing talk for UCL's institutional review of ATLAS EXOT-2013-19 (draft of paper to be published in journal). Document: http://cds.cern.ch/record/1701155 [ATLAS internal].
   * Meeting with Emily. Discussed three possible ATLAS analyses that I could work on: 
      1 Higgs production via VBF, measuring differential cross section in four-lepton channel. (Most promising for MC studies.)
      1 Dark matter search using monojet events. New approach to reducing systematic uncertainties. (MC challenges are not expected.)
      1 "X -&gt; H H -&gt; b bbar tau+ tau-" analysis. Katherine and others are already working on this. (MC challenges are expected to be negligible compared to experimental ones.)
   * Writing reports (First year review, ATLAS qualification task)
   * Signed up for STFC HEP summer school (31.8.&ndash;12.9. in Warwick)

_Haven't used this log in a while. I'm starting again now. Much has happened in between._

10/03/2014
   * [[%ATTACHURL%/Meeting_with_Keith_2014-03-14.pdf][More studying of Pythia's main31 and ttbar modelling]]
03/03/2014
   * Configuring my own stand-alone HEP software (generators, Rivet, and auxiliary software) on LXPlus and writing scripts for generating events and running Rivet
   * Following up on the curious behaviours in Pythia's main31
24/02/2014
   * [[%ATTACHURL%/Meeting_with_Keith_2014-02-28.pdf][First interesting findings on functioning of Pythia's main31]]
   * Reading: 
      * Buckley et al.: "General-purpose event generators for LHC physics" [arXiv:1101.2599]
17/02/2014
   * Working on understanding Pythia's main31
10/02/2014
   * Exams on Monday and Tuesday
   * Now I can: 
      * Generate ttbar events with Powheg
      * Process Powheg events with Pythia 8 (i.e. using LHE file input) in main31
      * Process LHE files containing NLO process with Pythia without the additional functionality of main31
   * Currently learning to: 
      * Save Pythia output (as HepMC files or ROOT files?) and process it with Rivet
      * Generate and process events on my own computer with the same settings as I do in Athena on-the-fly (this is the 'ultimate goal')
   * Seminar "QCD resummation for jet and hadron production" by Werner Vogelsang (Universität Tübingen)
   * Reading: 
      * Sjöstrand, Mrenna, Skands: "A Brief Introduction to PYTHIA 8.1" [arXiv:0710.3820]
03/02/2014
   * Nothing but revising for exams next week many hours a day
27/01/2014
   * Revising for exams
20/01/2014
   * Installed a heap of HEP software
   * Work on understanding Main31 (the version that ships with Pythia 8)
   * Mini-workshop about the future of HepMC
   * ATLAS MC generator meeting, discussed coordination of top modelling work with others (Thorsten Kuhl, Dominic Hirschbühl, Liron Barak, James Monk)
13/01/2014
   * 
06/01/2014
   * ATLAS UK meeting in Edinburgh, including ATLAS software workshop (Monday to Wednesday)
   * Work on understanding Main 31 in detail and writing notes about it (part of which could later enter my thesis as well as ATLAS instructions)
   * Got a new laptop (MacBook Pro)
30/12/2013 (on holiday)

23/12/2013 (on holiday)

16/12/2013
   * Prepared talk for UCL HEP group Christmas meeting ([[%ATTACHURL%/2013-12-18_Christmas_meeting.pdf][First presentation of work to UCL HEP group]])
   * Leaving on vacation 19/12/2013
09/12/2013
   * (I was designated an MCnet advisor: Torbjörn Sjöstrand)
   * Got Main31 user hook to work with Powheg+Pythia8. Generated 50k events and produced Rivet plots
   * Tried to turn off all Pythia parton-level activities except hard process. Pythia complains about these events, after 499 failed events throws exception. Disable Pythia's (and TestHEPMC's) self-checks for running
   * Presented first plots and ideas about ATLAS ttbar service task to James Monk, Stefano Camarda and Stephen Bieniek ([[%ATTACHURL%/2013-12-11_TTbarModelling.pdf][slides]])
   * Gave a similar presentation at the UCL weekly ATLAS meeting ([[%ATTACHURL%/2013-12-11_TTbarModelling.pdf][slides]])
   * TTbar TODO (not exhaustive): 
      * Use leading-order PDFs for Pythia (recommended, since no negative gluon contributions as in NLO PDFs). Eg. HERAPDF, CTEQ6.1
      * Continue using NLO PDFs for Powheg (CT10 is fine)
      * alphaS is quite high in the Pythia showers. Lowering its value (eg matching to the value in the PDF) might reduce jet activity as desired.
02/12/2013
   * 
25/11/2013
   * (Working from Helsinki November 27&ndash;29)
18/11/2013
   * Work on gg -&gt; H calculation: 
      * Learned about Veltman-Passarino reduction
      * [[%ATTACHURL%/Gluon_fusion_to_Higgs_at_NLO.pdf][Here's a slightly updated version of the report.]] Still ugly and work-in-progress.
   * Gerard 't Hooft's lecture at King's College: "Conformal symmetry in black holes and quantum gravity" (Was awesome!)
   * Reading 
      * Corke, Sjöstrand: "Improved Parton Showers at Large Transverse Momenta" [arXiv:1003.2384v1]
      * Seymour, Marx: "Monte Carlo Event Generators" [arXiv:1304.6677v1]
11/11/2013
   * Tried this: 2 days lectures, 1 day NLO calculation, 1 day ATLAS service work, 1 day course homework
   * Ran Rivet within the ATLAS software (Athena) with help from Stephen B.
   * Got organised with service task and Athena: created TODOs, directories, setup scripts, git repositories, etc.
   * Produced more samples
   * More work with FORM, progress but no perfection so far
   * Reading 
      * Ellis, Stirling, Webber: "QCD and Collider Physics" (started)
04/11/2013
   * Started working on ATLAS service task 
      * Skype talk with James Monk, Stephen Bieniek, Keith Hamilton
      * Set up Athena and generated some events (ttbar, POWHEG + PYTHIA 6/8)
   * Compiled and installed a heap of software on my laptop 
      * ROOT 5.34/11
      * GNU Scientific Library (GSL)
      * HepMC, FastJet, yaml-cpp, YODA
      * Working on installing Rivet, not yet successful (make error: =library not found for -lSISConePlugin=)
   * Wednesday and Thursday: Software Carpentry workshop ([[http://benwaugh.github.io/2013-11-06-ucl/][description]], [[http://benwaugh.github.io/2013-11-06-ucl/lessons/][lessons]])
   * Seminar "H -&gt; bb in ATLAS" by Gabriel Facini (CERN)
   * First edit of the (compulsory) PhD student e-log
28/10/2013
   * Monday and Tuesday: MCnet meeting in Manchester ([[%ATTACHURL%/2013-10-28_MCnet_meeting.pdf][MCnet meeting slides]])
   * Writing up some personal notes of general sessions and private conversations at the MCnet meeting (iff they turn out to be good enough, I will upload them here)
   * Properly started work on gg -&gt; H @ NLO calculation
   * Installed updated versions of GNU autoconf and automake. These will enable easier installation of HEP software.
   * Installed and started learning to use [[http://www.nikhef.nl/~form/][FORM]], which I need for the NLO calculation
21/10/2013
   * Prepared a short presentation for the MCnet meeting in Manchester next week ([[%ATTACHURL%/2013-10-28_MCnet_meeting.pdf][MCnet meeting slides]])
   * Seminar "FTK: A hardware-based track finder for the ATLAS trigger" by Lauren Tompkins (University of Chicago)
   * Reading 
      * Bentvelsen, Laenen, Motylinski: "Higgs production through gluon fusion at leading order" [NIKHEF preprint 2005 - 007]
      * Dawson: "Radiative corrections to Higgs boson production" [Nucl. Phys. B359 (1991) 283-300]
14/10/2013
   * First week with a non-negligible amount of course homework&hellip;
   * Worked on notes on gg -&gt; H @ LO calculation
07/10/2013
   * Finished calculation of gg -&gt; H @ LO ([[%ATTACHURL%/Gluon_fusion_to_Higgs_at_NLO.pdf][notes, work in progress]])
   * John Ellis' lecture on Higgs physics (2/3) at King's College
   * Seminar "Heavy Neutrino Searches at the LHC" by Bhupal Dev (University of Manchester)
   * First time at UCL ATLAS group meeting <!-- Talks:  (Eric Jansen),  (Stephen Bienik). ??? presented herself and her previous work (some interesting points about 3-prong tau lepton "recovery" when only two tracks are detected/resolved) -->

30/09/2013
   * Lectures started (Monday and Tuesday)
   * Continued calculation of gg -&gt; H @ LO
   * Got a desk PC and a UCL HEP computing account
   * John Ellis' lecture on Higgs physics (1/3) at King's College
   * Registered for MCnet meeting in Manchester & booked trains
23/09/2013
   * Started calculation of gg -&gt; H cross section at leading order
   * Read PhD student post-1st-year reports and sent feedback
   * Post-1st-year PhD student talks
   * HEP group annual meeting
   * Registered at UCL
   * Start of PhD!
</noautolink>

Attachments

Topic attachments
I	Attachment	History	Action	Size	Date	Who	Comment
pdf	2013-10-28_MCnet_meeting.pdf	r2 r1	manage	52.8 K	2013-10-25 - 13:21	StefanRichter	Presentation slides for MCnet meeting in Manchester, October 28-29, 2013
pdf	2013-12-11_TTbarModelling.pdf	r1	manage	6200.5 K	2013-12-11 - 15:03	StefanRichter	ATLAS service task on top pair modelling: short presentation of progress and ideas. Featuring first distribution plots
pdf	2013-12-13_UCL-ATLAS_TTbarModelling.pdf	r1	manage	6203.0 K	2013-12-16 - 16:49	StefanRichter	ATLAS service task on top pair modelling: short presentation of progress and ideas at the UCL ATLAS group's weekly meeting.
pdf	2013-12-18_Christmas_meeting.pdf	r2 r1	manage	7878.0 K	2013-12-17 - 13:44	StefanRichter	Presentation of my work at the UCL HEP group Christmas meeting 2013.
pdf	Gluon_fusion_to_Higgs_at_NLO.pdf	r2 r1	manage	334.6 K	2013-11-22 - 15:39	StefanRichter	Notes on the cross section calculation for Higgs boson production via gluon fusion at next-to-leading order (W.I.P)
pdf	Meeting_with_Keith_2014-02-28.pdf	r1	manage	538.5 K	2014-03-03 - 14:53	StefanRichter	Slides on studies of Pythia's main31 program. Very low level testing.
pdf	Meeting_with_Keith_2014-03-14.pdf	r1	manage	340.8 K	2014-03-12 - 11:23	StefanRichter	Slides on studies of Pythia's main31 program and the MC/data discrepancy observed in ttbar events generated with Powheg + Pythia 8.

Topic revision: r53 - 2014-05-15 - StefanRichter

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