MY YEAR CHRIS BURR - Indico
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CHRIS BURR MY YEAR…
LAST CHRISTMAS • Christmas at home • New years in Romania
JANUARY • Went to Moriond (while skiing in Val Thorens)
AIDA-2020-MS40
AIDA-2020
AIDA 2020
Advanced European Infrastructures for Detectors at Accelerators
Milestone Report • First milestone achieved
• Alignment toolkit using DD4hep
Running prototype for alignment toolkit
Borghi, S. (UNIMAN) et al • Paris for AIDA Annual Meeting
31 January 2017
The AIDA-2020 Advanced European Infrastructures for Detectors at Accelerators project
has received funding from the European Union’s Horizon 2020 Research and Innovation
programme under Grant Agreement no. 654168.
This work is part of AIDA-2020 Work Package 3: Advanced software.
The electronic version of this AIDA-2020 Publication is available via the AIDA-2020 web site
or on the CERN Document Server at the following URL:
Copyright c CERN for the benefit of the AIDA-2020 Consortium
A N A LY S I S P R E S E R V AT I O N
LHCb-INT-2017-021
October 17, 2017
• Analysis preservation hackathon
LHCb Analysis Preservation
• Internal note on AP in LHCb Roadmap
Sebastian Neubert1 , Ana Trisovic2 , Alex Pearce2 , Stefan Roiser2 , Vladimir V. Gligorov3 ,
Ben Couturier2 , Andrey Ustyuzhanin4 , Patrick Koppenburg5 , Chris Burr6 .
1
Physikalisches Institut, Ruprecht-Karls-Universität Heidelberg, Heidelberg, Germany
2
European Organisation for Nuclear Research (CERN), Geneva, Switzerland
3
LPNHE,Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris, France
4
Yandex School of Data Analysis, Moscow, Russia
5
Nikhef National Institute for Subatomic Particles, Amsterdam, The Netherlands
6
School of Physics and Astronomy, University of Manchester, Manchester, United Kingdom
LHCb-INT-2017-021
Abstract
This document defines a realistic scope for analysis preservation in LHCb and
22/08/2017
presents recommendations on its technical and organizational implementation. The
solutions provided take into account the utility of each proposed action already
during the analysis design and review phases. The proposed practices for analysis
preservation are categorized into four domains: the analysis repository, analysis
pipelines, run-time environment and data preservation. In each of those four
domains a minimal set of methods is identified, which forms the basis of all analysis
preservation e↵orts. Additionally an expanded set of best practices is recommended,
which are needed in order to fully preserve an analysis on the central CERN analysis
preservation infrastructure. A roadmap for the successive adoption of these best
practices is presented.
TESTBEAMS • Did shifts and aligned data for various velo testbeams
BACK TO ROMANIA
THE ENERGY TEST • Test for if two samples come from the same distribution • Wrote an optimised CPU version (faster than the GPU version in most cases) • Helped will check the scaling characteristic
S C A N D I N AV I A • Visited Copenhagen, Stockholm & Oslo
UPGRADE VELO ALIGNMENT
• Studied the impact of misalignment on physics
• Presented at the EDR in Manchester
1 1 1 1
1
y
z
zSUMMER STUDENTS
• Athina Papachristodoulou • Anna Madeleine Petersson Sjögren
• CP Violation in D⁰ →ɸɣ • Alignment of Upgrade Velo
Alignment of the VELO pixel detector
Project report by Anna Madeleine Petersson Sjögren
CERN Summer Student Report 2017 Supervised by Silvia Borghi
for the LHCb Collaboration
CERN Summer Student Programme 2017
September 22, 2017
CP Violation for decay D0!
Athina Papachristodoulou
Supervised by: Chris Burr
Abstract
The LHCb experiment is designed to perform high precision measurements to study CP-violation
and rare decays of beauty and charm hadrons. During LS2, prior to Run 3 of the LHC, the LHCb
Abstract detector will go through a major upgrade. One of the sub-detectors that will be upgraded is the
Vertex Locator (VELO) which after the upgrade will be capable of readout at 40 MHz at a luminos-
ity of 2· 1033 cm 2 s 1 . VELO is a high precision detector designed to reconstruct and discriminate
between primary and secondary vertices close to the interaction point. Due to safety of the detector,
In order to make a CP violation measurement re-stripping of the 2012 the VELO is divided into two retractable halves which prior to each fill into LHC are retracted from
data set is required due to lack of a reference mode. This study modeled the beam-line, and closed once stable beam is declared. Best possible performance of the VELO
requires the halves of the VELO, and the individual detector elements of it, to be aligned for correct
the mass distribution of the D0 meson when decaying via D0 ! . From reconstruction of tracks and vertices.
the analysis , 1040 ± 46 signal events were measured from the 2012 LHCb In this project the radial residual distribution is studied for different track selections for each and
every module of the VELO detector using MC data. Also, the mean residual has been studied as a
1
Run I data set using an integrated luminosity of 2 f b and reconded at a function of module number and ⌘-angle.
centre-of-mass energy of 8 TeV.D⁰ →ɸƔ
CHARMING PEAKS • Talked about prospects at LHCb in radiative charm decays
S O F T W A R E PA C K A G I N G • Investigated using Nix instead of LCG • Useful for analysis preservation • Designed to allow many fully defined environments • Install directory contains a hash of all dependencies • Proof of concept running, including a build of Gaudi
2 0 1 8 S TA R T E R K I T • Organised the 2018 LHCb Starterkit with Violaine Belle • In collaboration with ALICE • 47(+25) attendies and 58 pizzas!
PLANS FOR 2018 • Finish analysis of D→hllʹ • Continue with D⁰ →ɸɣ • Get the alignment working with DD4hep in the LHCb software • Continue with my various side projects • Go to some nice places • Try to forget I’m the oldest LHCb student once Lorenzo is done…
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