Dr. Andrea Bocci. Using GPUs to Accelerate Online Event Reconstruction. at the Large Hadron Collider. Applied Physicist
|
|
- Ami Lawson
- 5 years ago
- Views:
Transcription
1 Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider Dr. Andrea Bocci Applied Physicist On behalf of the CMS Collaboration
2 Discover CERN Inside the Large Hadron Collider at CERN we recreate the conditions found in the very early Universe less than a second after the Bing Bang to create particles that are not present in ordinary matter. Hydrogen nuclei protons are accelerated up to times the speed of light, to an energy that is almost 7000 their mass and then made to collide, converting all that energy into new particles that did no exist before the collisions like the Higgs boson. 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 2
3 Discover CERN
4 the CMS detector Muon detectors 4 Tesla superconducting magnet Hadronic calorimeter brass and scintillators Inner Tracker silicon pixel and silicon strip Electromagnetic calorimeter lead tungstate crystals Full readout: 1 MB/event ADC conversion zero suppression 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 4
5 Data Acquisition constraints The LHC produces over 3 billion proton collisions per second in ATLAS and CMS over 1.5 billion in each experiment grouped in 30 millions events per second on average, over 50 collisions per event! Recording every event would require reading and processing 30 TB/s of data well over the capacity of the detector electronics of the online and offline event processing and of the long-term storage Instead, the experiments rely on a two-level trigger system to collect only the interesting events e.g. Standard Model probes, Higgs boson candidates, possible signatures of new physics the Level 1 Trigger (L1T), implemented with custom electronics, reduces the data rate from 30 MHz to 100 khz The High Level Trigger (HLT), implemented on standard servers, further reduces it to an average of 1 khz 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 5
6 the Level 1 Trigger Fast readout of the detector, with a coarse granularity electromagnetic calorimeter hadronic calorimeter muon detectors Implementation hardware: ASICs and FPGAs synchronous operation 40 MHz LHC clock Constraints from the detectors pipeline: ~4 μs to take a decision readout: 100 khz maximum output rate 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 6
7 Data Acquisition & HLT L1 Trigger 100 khz storage manager transfer system event builder on-demand reconstruction & event selection raw data fragments 100 GB/s 20 TB RAM > CPU cores 5 GB/s to Tier-0 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 7
8 the High Level Trigger detector readout with full granularity, at 100 khz constraints 300 ms average time to take a decision 1 khz average output rate (rejection 100:1) software event reconstruction and selection runs on commercial servers quasi-real-time, self-monitoring CMSSW: a modular C++ reconstruction software over 4000 modules, written by hundreds of physicist configured via a dedicated python library each module runs as one or more TBB tasks exploit multi-threading to run multiple modules and reconstruct multiple events concurrently 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 8
9 Event reconstruction
10
11 Online reconstruction Jets/MET reco 3% E/Gamma reco 4% Muons reco 7% Particle Flow and Taus reco 8% Application logic and I/O 15% ECAL local reco 8% HCAL local reco 16% Full tracking and vertexing 30% Pixel local reco and tracking 9% 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 11
12 Local reconstruction First step of the reconstruction Over 120 millions of channels individual pixels in an image multiple samples over time Particle Flow and Taus reco 8% Muons reco 7% E/Gamma reco 4% Jets/MET reco 3% Application logic and I/O 15% ECAL local reco 8% Extract individual features from each detector 2D clusters and coord. transform multiple peak finding build inner track stubs Can be processed in parallel Full tracking and vertexing 30% Pixel local reco and tracking 9% HCAL local reco 16% 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 12
13 Track reconstruction Build tracks with the full silicon tracker information Iterative process, dominated by combinatorial complexity start from easy candidates data is cleaned after each step Parallel workflow 1000 s of tracks Very non-homogeneous propagation across layers strong magnetic field bends tracks Similar to ray-tracing in a non-linear space Particle Flow and Taus reco 8% Muons reco 7% E/Gamma reco 4% Jets/MET reco 3% Full tracking and vertexing 30% Application logic and I/O 15% Pixel local reco and tracking 9% ECAL local reco 8% HCAL local reco 16% 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 13
14 Physics objects Reconstructs physics objects electrons and photons muons tau leptons jets and missing transverse energy b-jets, invariant masses, jets substructure, Jets/MET reco 3% E/Gamma reco 4% Muons reco 7% Particle Flow and Taus reco 8% Application logic and I/O 15% ECAL local reco 8% Extract high level features combine the information from the previous steps hundreds of different algorithms dominated by the individual algorithm s complexity Full tracking and vertexing 30% Pixel local reco and tracking 9% HCAL local reco 16% Hard to parallelise 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 14
15 Application logic and I/O Application logic schedule multiple events concurrently run different algorithms on-demand Input and Output read input in the binary format defined by the electronics write multiple output files in a (compressed) object format Particle Flow and Taus reco 8% Muons reco 7% E/Gamma reco 4% Jets/MET reco 3% Application logic and I/O 15% ECAL local reco 8% HCAL local reco 16% Data Quality Monitoring monitor the physics and computing performance of the reconstruction Full tracking and vertexing 30% Pixel local reco and tracking 9% 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 15
16 High Luminosity LHC Starting in 2026, CMS will face an increase in luminosity by a factor 2.5x (x4) a corresponding increase in pileup and event complexity a higher readout rate by a factor x5 (x7.5) the reconstruction of data from new, more complex detectors Even assuming a linear scaling, CMS will need 12x (30x) more processing power! 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 16
17 Towards a Heterogeneous High Level Trigger
18 A traditional approach event builder on-demand reconstruction & event selection storage manager 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 18
19 Local accelerators event builder on-demand, accelerated reconstruction & event selection storage manager 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 19
20 Remote accelerators on-demand reconstruction & event selection storage manager accelerated reconstruction 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 20
21 On-demand remote accelerators event builder storage manager accelerated reconstruction 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 21
22 A case study
23 Exploit parallelism? Jets/MET reco 3% E/Gamma reco 4% Particle Flow and Taus reco 8% Muons reco 7% Application logic and I/O 15% ECAL local reco 8% HCAL local reco 16% Full tracking and vertexing 30% Pixel local reco and tracking 9% 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 23
24 How fast can we go? 500 ev/s 450 ev/s 400 ev/s 350 ev/s 300 ev/s 250 ev/s 200 ev/s Pixel local reconstruction and tracking 150 ev/s 100 ev/s 50 ev/s 0 ev/s 1 Xeon Gold /10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 24
25 How fast can we go? 500 ev/s 450 ev/s 400 ev/s 350 ev/s 300 ev/s 250 ev/s 200 ev/s Pixel local reconstruction and tracking 150 ev/s 100 ev/s 50 ev/s 0 ev/s 1 Xeon Gold Xeon Gold /10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 25
26 Can we go faster?
27 CMSSW framework and GPUs Leverage the inherent parallelism of the data Copy the pixel raw data to a GPU CMSSW modules queue on the GPU asynchronous memory operations and CUDA kernels all GPU operations run asynchronously from the CPU when complete, notify the framework via a callback the host CPU can process other data in parallel Keep all intermediate steps on the GPU using dedicated data structures that facilitate parallelism Transfer the results back to the host Convert to the format expected by the consumers 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 27
28 Can we go faster? 2500 ev/s 2000 ev/s 1500 ev/s 1000 ev/s Accelerated pixel local reconstruction and tracking 500 ev/s 0 ev/s 1 Xeon Gold Xeon Gold Tesla P100 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 28
29 Can we go faster? 2500 ev/s 2000 ev/s 1500 ev/s 1000 ev/s Accelerated pixel local reconstruction and tracking 500 ev/s 0 ev/s 1 Xeon Gold Xeon Gold Tesla P100 2 Tesla P100 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 29
30 Can we go even faster?
31 Can we go even faster? 5000 ev/s 4500 ev/s 4000 ev/s 3500 ev/s 3000 ev/s 2500 ev/s 2000 ev/s Accelerated pixel local reconstruction and tracking 1500 ev/s 1000 ev/s 500 ev/s 0 ev/s 1 Xeon Gold Xeon Gold Tesla P100 2 Tesla P100 1 Tesla V100 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 31
32 Can we go even faster? 5000 ev/s 4500 ev/s 4000 ev/s 3500 ev/s 3000 ev/s 2500 ev/s 2000 ev/s Accelerated pixel local reconstruction and tracking 1500 ev/s 1000 ev/s 500 ev/s 0 ev/s 1 Xeon Gold Xeon Gold Tesla P100 2 Tesla P100 1 Tesla V100 2 Tesla V100 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 32
33 Can we go even faster? 5000 ev/s 4500 ev/s 4000 ev/s 3500 ev/s 3000 ev/s 2500 ev/s 2000 ev/s Accelerated pixel local reconstruction and tracking 1500 ev/s 1000 ev/s 500 ev/s 0 ev/s 1 Xeon Gold Xeon Gold Tesla P100 2 Tesla P100 1 Tesla V100 2 Tesla V100 3 Tesla V100 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 33
34 Can we go even faster? 5000 ev/s 4500 ev/s 4000 ev/s 3500 ev/s 3000 ev/s 2500 ev/s 2000 ev/s Accelerated pixel local reconstruction and tracking 1500 ev/s 1000 ev/s 500 ev/s 0 ev/s 1 Xeon Gold Xeon Gold Tesla P100 2 Tesla P100 1 Tesla V100 2 Tesla V100 3 Tesla V100 4 Tesla V100 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 34
35 What else can we improve?
36 What else can we improve? 5000 ev/s 4500 ev/s CMS Simulation, Preliminary 4000 ev/s 3500 ev/s 3000 ev/s 2500 ev/s 2000 ev/s 1500 ev/s 1000 ev/s 500 ev/s 0 ev/s 1 Xeon Gold Xeon Gold Tesla P100 2 Tesla P100 1 Tesla V100 2 Tesla V100 3 Tesla V100 4 Tesla V100 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 36
37 Outstanding performance! 5000 ev/s 4500 ev/s CMS Simulation, Preliminary 4000 ev/s 3500 ev/s 3000 ev/s 2500 ev/s 10x faster! 2000 ev/s 1500 ev/s 2x better resolution! 1000 ev/s 500 ev/s 0 ev/s 1 Xeon Gold Xeon Gold Tesla P100 2 Tesla P100 1 Tesla V100 2 Tesla V100 3 Tesla V100 4 Tesla V100 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 37
38 Conclusions
39 Conclusions The computing requirements for the High Luminosity LHC cannot be met with a traditional approach CMS has started an R&D effort to port the reconstruction to CUDA The first case study, of the pixel local reconstruction and tracking, shows outstanding performance: 10x faster reconstruction, thanks to the Tesla V100 computing power 2x improved resolution, thanks to more advanced algorithms that can be afforded and the CUDA code is still being optimised! The experience of the next years will allows us to design a fully heterogeneous online farm for the HL-LHC! 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 39
40 Acknowledgments Thanks to the Flatiron Institute and CERN OpenLab for providing the hardware resources used in the benchmarks Thanks to CERN IdeaSquare for hosting the Patatrack hackathons 10/10/2018 E Using GPUs to Accelerate Online Event Reconstruction at the Large Hadron Collider - Andrea Bocci 40
41 Thank you for your attention Please give your feedback on this presentation on the GTC mobile app
42 Dr. Andrea Bocci Applied Phycisist the CMS Collaboration - CERN -
THE ATLAS TRIGGER SYSTEM UPGRADE AND PERFORMANCE IN RUN 2
THE ATLAS TRIGGER SYSTEM UPGRADE AND PERFORMANCE IN RUN 2 S. Shaw a on behalf of the ATLAS Collaboration University of Manchester E-mail: a savanna.marie.shaw@cern.ch The ATLAS trigger has been used very
More informationThe ATLAS trigger - commissioning with cosmic rays
Journal of Physics: Conference Series The ATLAS trigger - commissioning with cosmic rays To cite this article: J Boyd 2008 J. Phys.: Conf. Ser. 119 022014 Related content - The ATLAS Level-1 Central Trigger
More information4. LHC experiments Marcello Barisonzi LHC experiments August
4. LHC experiments 1 Summary from yesterday: Hadron colliders play an important role in particle physics discory but also precision measurements LHC will open up TeV energy range new particles with 3-5
More informationATLAS EXPERIMENT : HOW THE DATA FLOWS. (Trigger, Computing, and Data Analysis)
ATLAS EXPERIMENT : HOW THE DATA FLOWS (Trigger, Computing, and Data Analysis) In order to process large volumes of data within nanosecond timescales, the trigger system is designed to select interesting
More informationPoS(EPS-HEP 2013)508. CMS Detector: Performance Results. Speaker. I. Redondo * CIEMAT
: Performance Results * CIEMAT Av. Compluense 40 Madrid 28040, Spain E-mail: ignacio.redondo@ciemat.es The Compact Muon Solenoid (CMS) detector is one of the two multipurpose experiments at the Large Hadron
More informationThe Compact Muon Solenoid (CMS) experiment. at the Large Hadron Collider (LHC)
The Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC) Thursday, 12 February 2015 $ whoami S Lukasz (Luke) Kreczko Particle Physicist S Computing Research Assistant at the University
More informationIntroduction of CMS Detector. Ijaz Ahmed National Centre for Physics, Islamabad
Introduction of CMS Detector Ijaz Ahmed National Centre for Physics, Islamabad Layout of my Lectures: 1) Introduction of CMS Detector 2) CMS sub-detectors 3) CMS Trigger System Contents Introduction of
More informationThe ATLAS Run 2 Trigger: Design, Menu, Performance and Operational Aspects
he ALAS Run rigger: Design, Menu, Performance and Operational Aspects, on behalf of the ALAS Collaboration University of Pennsylvania E-mail: jmiguens@cern.ch AL-DAQ-PROC-6-5 5//6 he LHC, at design capacity,
More informationPERFORMANCE OF THE ATLAS MUON TRIGGER IN RUN 2
PERFORMANCE OF THE ATLAS MUON TRIGGER IN RUN 2 M.M. Morgenstern On behalf of the ATLAS collaboration Nikhef, National institute for subatomic physics, Amsterdam, The Netherlands E-mail: a marcus.matthias.morgenstern@cern.ch
More informationPhysics potential of ATLAS upgrades at HL-LHC
M.Testa on behalf of the ATLAS Collaboration INFN LNF, Italy E-mail: marianna.testa@lnf.infn.it ATL-PHYS-PROC-207-50 22 September 207 The High Luminosity-Large Hadron Collider (HL-LHC) is expected to start
More informationUpgrade of ATLAS and CMS for High Luminosity LHC: Detector performance and Physics potential
IL NUOVO CIMENTO 4 C (27) 8 DOI.393/ncc/i27-78-7 Colloquia: IFAE 26 Upgrade of ATLAS and CMS for High Luminosity LHC: Detector performance and Physics potential M. Testa LNF-INFN - Frascati (RM), Italy
More informationNon-collision Background Monitoring Using the Semi-Conductor Tracker of ATLAS at LHC
WDS'12 Proceedings of Contributed Papers, Part III, 142 146, 212. ISBN 978-8-7378-226-9 MATFYZPRESS Non-collision Background Monitoring Using the Semi-Conductor Tracker of ATLAS at LHC I. Chalupková, Z.
More informationDesign of the new ATLAS Inner Tracker for the High Luminosity LHC era
Design of the new ATLAS Inner Tracker for the High Luminosity LHC era Trevor Vickey on behalf of the ATLAS Collaboration University of Sheffield, United Kingdom July 3, 2017 19th iworid Krakow, Poland
More informationThe Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland. Commissioning of the CMS Detector
Available on CMS information server CMS CR -2009/113 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland 15 May 2009 Commissioning of the CMS
More informationIdentifying Particle Trajectories in CMS using the Long Barrel Geometry
Identifying Particle Trajectories in CMS using the Long Barrel Geometry Angela Galvez 2010 NSF/REU Program Physics Department, University of Notre Dame Advisor: Kevin Lannon Abstract The Compact Muon Solenoid
More informationThe ATLAS Detector - Inside Out Julia I. Hofmann
The ATLAS Detector - Inside Out Julia I. Hofmann KIP Heidelberg University Outline: 1st lecture: The Detector 2nd lecture: The Trigger 3rd lecture: The Analysis (mine) Motivation Physics Goals: Study Standard
More informationThe ATLAS muon and tau triggers
Journal of Physics: Conference Series OPEN ACCESS The ATLAS muon and tau triggers To cite this article: L Dell'Asta and the Atlas Collaboration 2014 J. Phys.: Conf. Ser. 523 012018 View the article online
More informationEfficient Implementation of High- Energy Physics Processing Using Modified Jet Reconstruction and Active Size Partitioning
Efficient Implementation of High- Energy Physics Processing Using Modified Jet Reconstruction and Active Size Partitioning Tony Gregerson University of Wisconsin Tony Gregerson, U. Wisconsin, 13 April
More information2 ATLAS operations and data taking
The ATLAS experiment: status report and recent results Ludovico Pontecorvo INFN - Roma and CERN on behalf of the ATLAS Collaboration 1 Introduction The ATLAS experiment was designed to explore a broad
More informationParticle detection 1
Particle detection 1 Recall Particle detectors Detectors usually specialize in: Tracking: measuring positions / trajectories / momenta of charged particles, e.g.: Silicon detectors Drift chambers Calorimetry:
More informationAnalysis of a Potential Tracking Algorithm for the SLHC Upgrade
Analysis of a Potential Tracking Algorithm for the SLHC Upgrade Rachael Creager Michael Swift 2012 NSF/REU Program Physics Department, University of Notre Dame Advisors: Professor Michael Hildreth Professor
More informationHiggs cross-sections
Ph.D. Detailed Research Project Search for a Standard Model Higgs boson in the H ZZ ( ) 4l decay channel at the ATLAS Experiment at Cern Ph.D. Candidate: Giacomo Artoni Supervisor: Prof. Carlo Dionisi,
More informationLHCb: From the detector to the first physics results
LHCb: From the detector to the first physics results Olivier Callot Laboratoire de l Accélérateur Linéaire, IN2P3/CNRS and Université Paris XI, Orsay, France On behalf of the LHCb collaboration In this
More informationTrigger di primo livello per gli esperimenti ATLAS & CMS ad LHC
Trigger di primo livello per gli esperimenti ATLAS & CMS ad LHC F.Pastore INFN Sezione di Roma II Workshop sulla fisica di ATLAS e CMS Napoli, 13-15 Ottobre 2004 Outline LHC Physics Program Requirements
More informationStatus and Performance of the ATLAS Experiment
Status and Performance of the ATLAS Experiment P. Iengo To cite this version: P. Iengo. Status and Performance of the ATLAS Experiment. 15th International QCD Conference (QCD 10), Jun 2010, Montpellier,
More informationA glance at LHC Detector Systems. Burkhard Schmidt, CERN PH-DT
A glance at LHC Detector Systems Burkhard Schmidt, CERN PH-DT The Enter LHC a New accelerator Era in Fundamental and the detectors Science Start-up of the Large Hadron Collider (LHC), one of the largest
More informationRisultati dell esperimento ATLAS dopo il run 1 di LHC. C. Gemme (INFN Genova), F. Parodi (INFN/University Genova) Genova, 28 Maggio 2013
Risultati dell esperimento ATLAS dopo il run 1 di LHC C. Gemme (INFN Genova), F. Parodi (INFN/University Genova) Genova, 28 Maggio 2013 1 LHC physics Standard Model is a gauge theory based on the following
More informationCMS Status and the US-CMS DAQ projects
CMS Status and the US-CMS DAQ projects Ichiro Suzuki Fermi National Accelerator Laboratory KEK Seminar, 2003/03/24 1 Contents What am I talking about? Introduction What are we going to do? Physics topics
More informationMuon reconstruction performance in ATLAS at Run-2
2 Muon reconstruction performance in ATLAS at Run-2 Hannah Herde on behalf of the ATLAS Collaboration Brandeis University (US) E-mail: hannah.herde@cern.ch ATL-PHYS-PROC-205-2 5 October 205 The ATLAS muon
More informationFuture prospects for the measurement of direct photons at the LHC
Future prospects for the measurement of direct photons at the LHC David Joffe on behalf of the and CMS Collaborations Southern Methodist University Department of Physics, 75275 Dallas, Texas, USA DOI:
More informationElectron reconstruction and identification in CMS at LHC
Electron reconstruction and identification in CMS at LHC on behalf of CMS collaboration 1 Outline The CMS detector @ LHC Electron reconstruction components Performance Electron identification Measurements
More informationValidation of Geant4 Physics Models Using Collision Data from the LHC
Journal of Physics: Conference Series Validation of Geant4 Physics Models Using Collision from the LHC To cite this article: S Banerjee and CMS Experiment 20 J. Phys.: Conf. Ser. 33 032003 Related content
More informationATLAS HLT Steering. Andrey Belkin Johannes Gutenberg Universität Mainz
ATLAS HLT Steering Johannes Gutenberg Universität Mainz 36. Herbstschule für Hochenergiephysik Maria Laach, Overview ATLAS detector Trigger system Steering Performance tests Status and outlook Johannes
More informationb Physics Prospects For The LHCb Experiment Thomas Ruf for the LHCb Collaboration Introduction Detector Status Physics Program
b Physics Prospects For The LHCb Experiment Thomas Ruf for the LHCb Collaboration Introduction Detector Status Physics Program b Primary goal of the LHCb Experiment Search for New Physics contributions
More information7 Physics at Hadron Colliders
7 Physics at Hadron Colliders The present and future Hadron Colliders - The Tevatron and the LHC Test of the Standard Model at Hadron Colliders Jet, W/Z, Top-quark production Physics of Beauty Quarks (T.
More informationCMS ECAL status and performance with the first LHC collisions
CMS ECAL status and performance with the first LHC collisions XIV International Conference on Calorimetry in High Energy Physics (Calor 2010) Konstantinos Theofilatos (ETH Zurich) on behalf of CMS ECAL
More informationPerformance of the FastTracKer in ATLAS
Performance of the FastTracKer in ATLAS Maddalena Giulini under supervision of Prof. A. Schöning and Dr. T. Klimkovich Physikalisches Institut, Universität Heidelberg DPG Spring Conference, Mainz March
More informationPoS(DIS 2010)190. Diboson production at CMS
(on behalf of the CMS collaboration) INFN-Napoli & University of Basilicata E-mail: fabozzi@na.infn.it We present an analysis strategy based on Monte Carlo simulations for measuring the WW and WZ production
More informationLHC & ATLAS. The largest particle physics experiment in the world. Vincent Hedberg - Lund University 1
LHC & ATLAS The largest particle physics experiment in the world 1 CERN A laboratory for the world Torsten Gustavson CERN was founded in 1954 There were 12 member states in the beginning. 2 OBSERVERS:
More informationREADINESS OF THE CMS DETECTOR FOR FIRST DATA
READINESS OF THE CMS DETECTOR FOR FIRST DATA E. MESCHI for the CMS Collaboration CERN - CH1211 Geneva 23 - Switzerland The Compact Muon Solenoid Detector (CMS) completed the first phase of commissioning
More informationHiggs Boson Physics. Analysis Techniques. Günter Quast, Roger Wolf, Andrew Gilbert Master-Kurs SS
Higgs Boson Physics Analysis Techniques Günter Quast, Roger Wolf, Andrew Gilbert Master-Kurs SS 2015 Institut für Experimentelle Kernphysik KIT Universität des Landes Baden-Württemberg und nationales Forschungszentrum
More informationRidge correlation structure in high multiplicity pp collisions with CMS
Ridge correlation structure in high multiplicity pp collisions with CMS Dragos Velicanu for the CMS Collaboration MBUEWG CERN, Geneva, June 17 2011 Results from High Multiplicity pp Dragos Velicanu (MIT)
More informationApplication of the Tau Identification Capability of CMS in the Detection of Associated Production of MSSM Heavy Neutral Higgs Bosons Souvik Das
Application of the Tau Identification Capability of CMS in the Detection of Associated Production of MSSM Heavy Neutral Higgs Bosons Souvik Das Cornell University (September 11, 2006) Decays of the Tau
More informationDi muons and the detection of J/psi, Upsilon and Z 0 Jets and the phenomenon of jet quenching
collisions in CMS Bolek Wyslouch École Polytechnique Massachusetts Institute of Technology on behalf of CMS Collaboration CERN, December 2, 2010 1 Heavy Ions at the LHC Huge energy jump from RHIC: factor
More informationOPERATIONS & PERFORMANCE OF THE ATLAS DETECTOR IN LHC RUN II
OPERATIONS & PERFORMANCE OF THE ATLAS DETECTOR IN LHC RUN II CANADIAN ASSOCIATION OF PHYSICISTS CONGRESS MAY 2017 Emma Kuwertz University Of Victoria OVERVIEW 2 Updating you on the performance of the LHC
More informationExpected Performance of the ATLAS Inner Tracker at the High-Luminosity LHC
Expected Performance of the ATLAS Inner Tracker at the High-Luminosity LHC Matthias Hamer on behalf of the ATLAS collaboration Introduction The ATLAS Phase II Inner Tracker Expected Tracking Performance
More informationRecent CMS results on heavy quarks and hadrons. Alice Bean Univ. of Kansas for the CMS Collaboration
Recent CMS results on heavy quarks and hadrons Alice Bean Univ. of Kansas for the CMS Collaboration July 25, 2013 Outline CMS at the Large Hadron Collider Cross section measurements Search for state decaying
More informationLong lived particle decay LHC. Simone Gennai on behalf of the ATLAS, CMS and LHCb Collaborations
Long lived particle decay searches @ LHC Simone Gennai on behalf of the ATLAS, CMS and LHCb Collaborations 1 Why searching for LLP? 2 Standard Model includes quite few LLP it is natural to assume they
More information2008 JINST 3 S Outlook. Chapter 11
Chapter 11 Outlook The broad range of physics opportunities and the demanding experimental environment of highluminosity 14 TeV proton-proton collisions have led to unprecedented performance requirements
More informationThe CMS Particle Flow Algorithm
PROCEEDINGS of CHEF 13 he CMS Particle Flow Algorithm Laboratoire Leprince-Ringuet, INP3-CNRS E-mail: Florian.Beaudette@cern.ch A particle flow event-reconstruction algorithm has been successfully deployed
More informationarxiv: v1 [hep-ex] 2 Nov 2010
Early b-physics at CMS Andrea Rizzi EH Zurich, Switzerland arxiv:.64v [hep-ex] Nov he CMS experiment at the Large Hadron Collider collected in the first months of operation a luminosity of about /nb. he
More informationAlexei Safonov Lecture #18
Methods of Experimental Particle Physics Alexei Safonov Lecture #18 1 Presentations: Trigger Today Lecture D0 calorimeter by Jeff 2 Collisions at LHC 14 000 x mass of proton (14 TeV) = Collision Energy
More informationThe HL-LHC physics program
2013/12/16 Workshop on Future High Energy Circular Collider 1 The HL-LHC physics program Takanori Kono (KEK/Ochanomizu University) for the ATLAS & CMS Collaborations Workshop on Future High Energy Circular
More informationSearch for a Lepton Flavor Violating Higgs Boson Using the Compact Muon Solenoid Detector at the Large Hadron Collider
Search for a Lepton Flavor Violating Higgs Boson Using the Compact Muon Solenoid Detector at the Large Hadron Collider University of Wisconsin-Madison 1 Outline Theoretical Background Standard Model Higgs
More informationTrigger in ATLAS and CMS
Trigger in ATLAS and CMS Christos Leonidopoulos CERN-PH On behalf of the ATLAS and CMS collaborations LHC New Physics Signatures Workshop January 5-11, 2008, Ann Arbor What are we trying to do? Find the
More informationThe first Z boson measurement in the dimuon channel in PbPb collisions at s = 2.76 TeV at CMS
The first Z boson measurement in the dimuon channel in PbPb collisions at s = 2.76 TeV at CMS Lamia Benhabib On behalf of CMS collaboration We present the first measurement of Z bosons in the di-muon channel
More informationLHC Detectors and their Physics Potential. Nick Ellis PH Department, CERN, Geneva
LHC Detectors and their Physics Potential Nick Ellis PH Department, CERN, Geneva 1 Part 1 Introduction to the LHC Detector Requirements & Design Concepts 2 What is the Large Hadron Collider? Circular proton-proton
More informationUpgrade of ATLAS Electron and Photon Triggers and Performance for LHC Run2
Upgrade of ALAS Electron and Photon riggers and Performance for LHC Run2 Ryan Mackenzie White (UFSM,Chile) on behalf of ALAS Collaboration NEC 2015 XXV International Symposium on Nuclear Electronics &
More informationMuon commissioning and Exclusive B production at CMS with the first LHC data
Muon commissioning and Exclusive B production at CMS with the first LHC data Silvia Taroni INFN Milano Bicocca On the behalf of the CMS collaboration Outline Introduction CMS detector Muon detection in
More informationThe Collider Detector at Fermilab. Amitabh Lath Rutgers University July 25, 2002
The Collider Detector at Fermilab Amitabh Lath Rutgers University July 25, 2002 What is Fermilab? A user facility with the Tevatron: 4 mile ring with superconducting magnets. Collides protons with antiprotons.
More informationIntroduction to CERN and CMS
Introduction to CERN and CMS and background for the CMS analysis Jamie Gainer University of Hawaii at Manoa April 1, 2017 What do I do? I am a postdoc at UH Manoa I am a theorist In physics there are theorists:
More informationMeasurement of the Inclusive Isolated Prompt Photon Cross Section at CDF
of the Inclusive Isolated Cross at IFAE Barcelona HEP Seminar University of Virginia Outline Theoretical introduction Prompt photon production The The Photon detection prediction The pqcd NLO prediction
More informationSaeid Paktinat School of Particles and accelerators IPM, Tehran
LHC/CMS Saeid Paktinat School of Particles and accelerators IPM, Tehran Third National Workshop on Detectors and Calculation Methods in Particle Physics Azar 26-28, 1387 Introduction CERN What and Where
More informationCMS Event Simulation
CMS Event Simulation Nicole A. Larsen Department of Physics, Georgia Institute of Technology, Atlanta, GA, 33 (Dated: August 11, 6) The CMS Detector located at the Large Hadron Collider at CERN recently
More informationDissecting the Higgs Discovery: The Anatomy of a 21st Century Scientific Achievement
Dissecting the Higgs Discovery: The Anatomy of a 21st Century Scientific Achievement Lauren Tompkins Arthur H. Compton Lectures October 19th, 2013 Lecture 7 Digesting the Data: Triggering and Data Processing
More informationBoosted searches for WW/WZ resonances in
Boosted searches for WW/WZ resonances in the lνj final state BILLIE LUBIS COLUMBIA UNIVERSITY REU 2016 CERN Founded in 1954 by 12 Western European countries Now 22 member countries Aims to conduct cutting-edge
More informationThe CMS Experiment: Status and Highlights
: Status and Highlights for the CMS Collaboration CERN, INFN and University of Pisa CERN, European Organization for Nuclear Research CH-1211 Geneva 23, Switzerland Abstract We present the status of the
More informationSearches for Long-Lived Particles in ATLAS: challenges and opportunities of HL-LHC
Searches for Long-Lived Particles in ATLAS: challenges and opportunities of HL-LHC Simone Pagan Griso Lawrence Berkeley National Lab. on behalf of the ATLAS Collaboration HL(/HE)-LHC Yellow-Report kick-off
More informationThe Compact Muon Solenoid Experiment. Conference Report. Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
Available on CMS information server CMS CR -2009/037 The Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland 16 February 2009 (v3, 25 February 2009)
More informationSearch for a Z at an e + e - Collider Thomas Walker
Search for a Z at an e + e - Collider Thomas Walker Significance: Many theories predict that another neutral gauge boson (Z ) may exist. In order to detect this Z, I would use an e + e - linear collider
More informationATLAS Run-2 status and performance
Nuclear and Particle Physics Proceedings 00 (2015) 1 5 Nuclear and Particle Physics Proceedings ATLAS Run-2 status and performance F.Pastore on behalf of the ATLAS Collaboration a a Royal Holloway, University
More informationCMS: Tracking in a State of Art Experiment
Novel Tracking Detectors CMS: Tracking in a State of Art Experiment Luigi Moroni INFN Milano-Bicocca Introduction to Tracking at HE Will try to give you some ideas about Tracking in a modern High Energy
More information(a) (b) Fig. 1 - The LEP/LHC tunnel map and (b) the CERN accelerator system.
Introduction One of the main events in the field of particle physics at the beginning of the next century will be the construction of the Large Hadron Collider (LHC). This machine will be installed into
More informationThe rejection of background to the H γγ process using isolation criteria based on information from the electromagnetic calorimeter and tracker.
Available on CMS information server CMS NOTE 22/3 The Compact Muon Solenoid Experiment CMS Note Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland September 9, 22 The rejection of background to
More informationUNIVERSITÀ DEGLI STUDI DI MILANO - BICOCCA DIPARTIMENTO DI FISICA G. OCCHIALINI CORSO DI DOTTORATO IN FISICA E ASTRONOMIA CICLO XXVII
UNIVERSITÀ DEGLI STUDI DI MILANO - BICOCCA DIPARTIMENTO DI FISICA G. OCCHIALINI CORSO DI DOTTORATO IN FISICA E ASTRONOMIA CICLO XXVII Measurement of the branching fraction of B c + J/ψπ + π π + relative
More informationHow to make the most of LHC data
How to make the most of LHC data low-mass resonances, triggering opportunities Antonio Boveia - CERN Caterina Doglioni - Lund University Matt Strassler 11/05/2016 - KITP plenary Introduction LHC: the biggest
More informationConference Report Mailing address: CMS CERN, CH-1211 GENEVA 23, Switzerland
CMS CR - he Compact Muon Solenoid Experiment Conference Report Mailing address: CMS CERN, CH- GENEVA 3, Switzerland 8/5/6 Charmonium production measured in and pp collisions by CMS arxiv:7.5v [nucl-ex]
More informationChapter 2 The CMS Experiment at the LHC
Chapter 2 The CMS Experiment at the LHC The Large Hadron Collider (LHC) [1] is designed to collide proton beams at a center-of-mass energy of s = 14 TeV and a nominal instantaneous luminosity of L = 10
More informationLHC State of the Art and News
LHC State of the Art and News ATL-GEN-SLIDE-2010-139 16 June 2010 Arno Straessner TU Dresden on behalf of the ATLAS Collaboration FSP 101 ATLAS Vulcano Workshop 2010 Frontier Objects in Astrophysics and
More informationPoS(CORFU2016)060. First Results on Higgs to WW at s=13 TeV with CMS detector
First Results on Higgs to WW at s=13 ev with CMS detector Università di Siena and INFN Firenze E-mail: russo@fi.infn.it he first measurement of the Higgs boson cross section at 13 ev in H WW 2l2ν decay
More informationLepton and Photon reconstruction and identification performance in CMS and ATLAS
Lepton and Photon reconstruction and identification performance in CMS and ATLAS Sandro Fonseca de Souza, on behalf of the CMS and ATLAS Collaborations Universidade do Estado do Rio de Janeiro Large Hadron
More informationHL-LHC Physics with CMS Paolo Giacomelli (INFN Bologna) Plenary ECFA meeting Friday, November 23rd, 2012
@ HL-LHC Physics with CMS Paolo Giacomelli (INFN Bologna) Plenary ECFA meeting Friday, November 23rd, 2012 Many thanks to several colleagues, in particular: M. Klute and J. Varela Outline Where we stand
More informationCommissioning of the CMS Detector
Commissioning of the CMS Detector Marina Giunta INFN Bologna On behalf of the CMS Collaboration XLIVth Rencontres de Moriond on QCD and High Energy Interactions La Thuile,14-21 March 2009 2008: very busy
More informationIntroduction to the Standard Model
Introduction to the Standard Model Bill Murray, RAL, Quarks and leptons Bosons and forces The Higgs March 2002 1 Outline: An introduction to particle physics What is the Higgs Boson? Some unanswered questions
More informationPhysics with Jets at the LHC
XXXIV Int. Symp. on Multiparticle Dynamics, Sonoma County, July 29, 2004 ISMD Rohlf p.1/50 Physics with Jets at the LHC Jim Rohlf Boston University Outline Introduction Detectors and expected performance
More informationA Search for Doubly Charged Higgs Production at 8 TeV Using the CMS Detector at the LHC
A Search for Doubly Charged Higgs Production at 8 TeV Using the CMS Detector at the LHC 1 UW-Madison Preliminary Examination Outline The Standard Model Doubly Charged Higgs Motivation Type II Seesaw Mechanism
More informationAIM AIM. Study of Rare Interactions. Discovery of New High Mass Particles. Energy 500GeV High precision Lots of events (high luminosity) Requirements
AIM AIM Discovery of New High Mass Particles Requirements Centre-of-Mass energy > 1000GeV High Coverage Study of Rare Interactions Requirements Energy 500GeV High precision Lots of events (high luminosity)
More informationTriggering on Long-lived neutral particles in ATLAS
Triggering on Long-lived neutral particles in ATLAS Our theoretical friends tell us that many extensions of the Standard Model that address the hierarchy problem contain new sectors These new sectors decouple
More informationStatus of ATLAS and Preparation for the Pb-Pb Run
Status of ATLAS and Preparation for the Pb-Pb Run Jiří Dolejší a for the ATLAS Collaboration a Charles University, Faculty of Mathematics and Physics, IPNP, V Holesovickach 2, CZ-180 00 Praha 8, Czech
More informationThe ATLAS C. Gemme, F.Parodi
The ATLAS Experiment@LHC C. Gemme, F.Parodi LHC physics test the Standard Model, hopefully find physics beyond SM find clues to the EWK symmetry breaking - Higgs(ses)? Standard Model is a gauge theory
More informationRecent Results from 7 GeV proton proton running at CMS
Recent Results from 7 GeV proton proton running at CMS Will E. Johns Vanderbilt University (for the CMS collaboration) SESAPS 2011 CMS Detector Detector pulled Apart for work 2 CMS Detector CMS Detector
More informationCollider Physics Analysis Procedures
Collider Physics Analysis Procedures Alex Tapper Slides available at: http://www.hep.ph.ic.ac.uk/~tapper/lecture.html Aim Overview of analysis techniques at CMS Contrast with Tevatron (see DØ lecture)
More informationReconstruction and identification of hadronic τ decays with ATLAS
Reconstruction and Identification of Hadronic τ Decays with ATLAS Wolfgang F. Mader 1 1 Institut für Kern- und Teilchenphysik TU Dresden DPG Frühjahrstagung München, March 2009 Outline 1 Introduction 2
More informationThe Discovery of the Higgs Boson: one step closer to understanding the beginning of the Universe
The Discovery of the Higgs Boson: one step closer to understanding the beginning of the Universe Anna Goussiou Department of Physics, UW & ATLAS Collaboration, CERN Kane Hall, University of Washington
More informationHow to Measure Top Quark Mass with CMS Detector??? Ijaz Ahmed Comsats Institute of Information Technology, Islamabad
How to Measure Top Quark Mass with CMS Detector??? Ijaz Ahmed Comsats Institute of Information Technology, Islamabad Outlines o o o o o o o High Pt top basic idea Methods for jets selection Top quark mass
More informationATLAS-CONF October 15, 2010
ATLAS-CONF-2010-096 October 15, 2010 Data-driven background estimation for the H τ + τ τ h search at 7 TeV with the ATLAS detector Ian Howley 7 December 2010 1 Motivation One of the primary LHC physics
More informationHiggs Searches and Properties Measurement with ATLAS. Haijun Yang (on behalf of the ATLAS) Shanghai Jiao Tong University
Higgs Searches and Properties Measurement with ATLAS Haijun Yang (on behalf of the ATLAS) Shanghai Jiao Tong University LHEP, Hainan, China, January 11-14, 2013 Outline Introduction of SM Higgs Searches
More informationPhysics at Hadron Colliders
Physics at Hadron Colliders Part 2 Standard Model Physics Test of Quantum Chromodynamics - Jet production - W/Z production - Production of Top quarks Precision measurements -W mass - Top-quark mass QCD
More informationATLAS Run 2 Higgs Prospects
ATLAS Run 2 Higgs Prospects Jessica Levêque LAPP Annecy-le-Vieux CNRS/IN2P3 on behalf of The ATLAS Collaboration Outline ATLAS Upgrades during LS1 ATLAS readiness First physics results with Run 2 data
More informationPerformance of muon and tau identification at ATLAS
ATL-PHYS-PROC-22-3 22/2/22 Performance of muon and tau identification at ATLAS On behalf of the ATLAS Collaboration University of Oregon E-mail: mansoora.shamim@cern.ch Charged leptons play an important
More information