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Yongsheng Gao (California State University, Fresno) 3/12/2018

LHC. California State University (CSU) ATLAS Program at LHC of CERN. Yongsheng Gao (California State University, Fresno) 3/12/2018. ATLAS Collaboration. ~3000 physicists, ~220 institutions, 40 countries. ~500 US physicists from ~45 universities/national labs.

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Yongsheng Gao (California State University, Fresno) 3/12/2018

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  1. LHC California State University (CSU) ATLAS Program at LHC of CERN YongshengGao (California State University, Fresno) 3/12/2018

  2. ATLAS Collaboration • ~3000 physicists, ~220 institutions, 40 countries • ~500 US physicists from • ~45 universities/national labs • CSU Fresno joined ATLAS in 2007 as the only CSU campus on ATLAS or CMS • Outstanding opportunities for CSU faculty, postdocs • and students for the next ~15 years or longer Yongsheng Gao

  3. California State University • Largest system in the US • 23 campuses with total of • ~470,000 students • Fresno: 5th most populous city in California Yongsheng Gao

  4. Fresno & National Parks Yongsheng Gao

  5. ATLAS at CSU Fresno Faculty: Yongsheng Gao (2007 to present) Postdocs:HarinderBawa (2008 to present) Andrew Lowe (2010 to 2012) • Students: 8 Masters & undergraduate • Strong support from Provost, College of Science & Mathematics, ORSP, Physics, IRA, etc.: $900K+ • 5 NSF grants (~$2.4M, indirect: ~$537K) since 2009. ~$500K in ATLAS membership fee • CSU Fresno was the only CSU campus on ATLAS or CMS, involved in Higgs discovery, and home institution of new CSU ATLAS program Yongsheng Gao

  6. NSF Support since 2007 EPP: Elementary Particle Physics • MRI: Major Research Instrumentation • IRES: International Research Experience for Students Yongsheng Gao

  7. CSU NUPAC • CSU Fresno: only CSU in Higgs discovery and • first research which resulted in a Nobel Prize • Building up the CSU Nuclear & Particle Physics • Consortium (NUPAC): 17 CSU campuses • Bakersfield, CI, Chico, DH, East Bay, Fresno, Humboldt, Northridge, LA, LB, Pomona, Sacramento, SB, SF, SLO, Sonoma, Stanislaus • Every summer since 2008, 5 to 12 CSU NUPAC • students to work at CERN on ATLAS research • CSU Fresno ATLAS: Center of CSU NUPAC which may become a CSU-wide affinity group Yongsheng Gao

  8. CSU NUPAC Campuses • Largest system in the US • 23 campuses with total of • ~470,000 students Yongsheng Gao

  9. CSU Students to CERN • 5 supported by ~$250K NSF IRES ($9K/student) Yongsheng Gao

  10. Summer 2016 at CERN • Student names in red are supported by NSF IRES award Yongsheng Gao

  11. CSU Students at CERN Yongsheng Gao

  12. CSU Fresno Students at CERN • 29 CSU Fresno students have worked on ATLAS at • CERN for at least one summer since 2008 • Projects: detector upgrade R&D, testing, software, grid • computing, trigger/DAQ, new physics searches, …... • Funded by CSM ($15K/yr), IRA (~$6K/yr), FSSR, etc. • Reported by Fresno Bee, ABC-30, CBS-47, KSEE-24, … • Charlie Young (SLAC): James MacDougall is the best summer student we have ever worked with, including those students from SLAC and Stanford University • http://zimmer.csufresno.edu/~yogao/ATLAS/ Yongsheng Gao

  13. CSU Students at CERN • Talks about research work at ATLAS meetings, attend CERN Summer Student Lecture Series • ATLAS paid airline ticket, hotel, and stipend for James MacDougall and Varun Varahamurthy to return and work at CERN after summer • Students admitted to UC-Berkeley, UCR, UCSD, UCSC, USC, Colorado, Iowa, Maryland, Michigan, UW, Hamburg, CEA Saclay, HEPHY Vienna, etc. • ATLAS/CERN working experience prepares our students for their personal and professional success in an increasingly competitive, global, and multi-cultural society Yongsheng Gao

  14. Students’ CERN Experience • CSU Fresno Physics Yongsheng Gao

  15. Ph.D students from China • Dengfeng Zhang (ATLAS Ph.D student from Shandong • University) has been working with Fresno State ATLAS • program since 2015 and worked in Fresno for 2 years • Zhang worked on searching for new physics in Dijet • final state and validation of ATLAS simulation using • testbeam data. Gave ~45 talks at ATLAS WG meetings • contributed to 2 ATLAS publications and 4 notes • Wei Ding (ATLAS Ph.D student from Tshinghua • University) came to Fresno in 9/2017 to work on • new physics search with Dijet and ATLAS Monte Carlo • generator validation. Gave 5 Talks at ATLAS WG • meetings Yongsheng Gao

  16. CSU ATLAS Program • CSU Sacramento and East Bay hired new ATLAS faculty • Joshua Moss and Kathryn Grimm in 2014 and 2017 to • start their ATLAS programs and contribute to NUPAC • 8/2015: Gao’s NSF EPP core grant renewed for $510K • and Dr. Moss received his first 3-year $360K NSF EPP • core grant from 8/1/2015 to 7/31/2018. Fresno State • ATLAS program renamed as “CSU ATLAS program” with • Fresno State/Gao as home institution/team leader • 10/2017: Fresno State/Sac State submitted one joint • proposal for CSU ATLAS with Gao/Moss as PI/Co-PI. • Kathy Grimm (East Bay) submitted her own proposal Yongsheng Gao

  17. CSU ATLAS Program • If both proposals are funded in 2018, 3 campuses can • submit one joint proposal in 10/2020 for next 3 years. • CSU ATLAS program will become an average sized • US ATLAS program. Other CSU campuses can follow • the examples of Sac State and East Bay to join the CSU • ATLAS program • 1/2018: Fresno State/Stanford submitted NSF IRES • proposal with PI: Gao, Co-PI: Prof. Lauren Tompkins • (Stanford U.): $400K to send 24 CSU students to work • at CERN for summers from 2019 to 2021 (8 students • per summer with $8K/student for working on ATLAS) Yongsheng Gao

  18. ATLAS Work • Electron Identification and e-p Separation with 2002 ATLAS LAr Test Beam Data • By L. Lu and Y. Gao (2002 to 2003) • Using both lateral and longitudinal information • (# of hit cells, depth profile, and E/P) • # of hit cells provides significant (factor of 2) • additional separation power for e-p separation • Another factor of 2 improvement when using • Neural Network (NN) instead of simple cuts • ATL-LARG-2003-013 and published in Nucl. • Instrum. Meth. A550, 96 (2005) Yongsheng Gao

  19. ATLAS Work • Significance Calculation & a New Method to Search for New Physics at LHC • By Y. Gao, L. Lu, and X. Wang (2005 to 2006) • Flaws in significance calculation of existing • methods at LHC in searching for new physics • General procedure to correctly evaluate • significance and compare search methods • New method (ML fit with parameter scan) • more powerful to discover new physics • Talks at ATLAS Higgs WG in 2005, 2006, 2007. • Published in Eur. Phys. J. C45, 659 (2006) Yongsheng Gao

  20. ATLAS Ph.D student • Liang Lu received his Ph.D in 2006 for his work • on LArtestbeam data and Eur. Phys. J. C • Returned to China in 2005 to work in IT and • served as CEO of several companies so far Yongsheng Gao

  21. ATLAS Work • Initiated ATLAS PID Evaluation Mechanism with Reflections of Known Physics Processes • By Y. Gao (2006 to 2007) • First measurements of charge confusion rate • and PID fake rates using reflections of known • physics processes (e.g. Z  e+e-, m+m-, etc.) • First realistic estimates of charge confusion • rate and PID fake rates on ATLAS • Talks at ATLAS Standard Model, e/, Higgs, • Exotics, Jet/EtMiss, Tau WG in 2006 and 2007. • Have been used by ATLAS collaboration since. Yongsheng Gao

  22. Tier2 Center • Tier2 Center • Tier2 Center • Tier2 Center • Tier2 Center HPSS HPSS HPSS HPSS • ATLAS Data Challenges • CERN/Outside Resource Ratio ~1:2Tier0/( Tier1)/( Tier2) ~1:1:1 • ~PByte/sec • ~100-400 MBytes/sec • >10 PB/Yr! • Online System • Offline Farm,CERN Computer Ctr • Tier 0 +1 HPSS • Tier 1 • 10+ Gbits/sec • BNL • France • UK • Italy • Tier 2 • Tier 3 • ~2.5+ Gbps • Institute • Institute • Institute • Institute • 100 - 10000 Mbits/sec • $620K MRI grant to Fresno State in 2010 for Tier 3s at 9 NSF EPP funded schools on ATLAS (Columbia, Chicago, Hampton, MSU, NIU, NYU, Stony Brook, and UW) • CSU Fresno Yongsheng Gao

  23. ATLAS Grid Computing • 8/2009: Led joint NSF Major Research Instrumentation • (MRI) proposal for all 9 NSF EPP grant supported • universities on ATLAS to build Tier 3 clusters at these • institutions • 3/2010: Received $620K NSF MRI grant. CSU Fresno • as the only lead institution with other 8 (U. of Chicago, • Columbia, Hampton, MSU, NIU, NYU, Stony Brook, • Washington) as subcontractors of CSU Fresno. • CSU Fresno Tier 3 cluster: 408 cores with 210 TB. • Computing needs up to 2015 only Yongsheng Gao

  24. ATLAS Grid Computing • 1/2015: Led & submitted joint NSF MRI proposal for • 18 NSF EPP supported universities on ATLAS and CMS: • Develop new LHCAnalyNet (Distributed Computing • Instrument) for incoming LHC Run-2 • CSU Fresno: Only lead institution in this ~$1M joint • US ATLAS/CMS proposal with other 17 (Chicago, • Columbia, Cornell, FIU, Kansas, MSU, Nebraska, NIU, • Northeastern, Notre Dame, NYU, Purdue-Calumet, • Rutgers, Stony Brook, SUNY-Buffalo, Vanderbilt, • Washington) as subcontractors of CSU Fresno • NSF: Cannot fund now. Maybe later Yongsheng Gao

  25. ATLAS Work • Observation of First W and Z from First ATLAS Data at 7 TeV • By H. Bawa, B. Wilson, etc. (2008 to 2009) • Inclusive production cross sections of W and Z • at LHC an important test of SM and ATLAS • before searching for New Physics beyond SM • First measurement of W  en cross section: • Background calculations, cutflow analysis, etc. • ATL-COM-PHYS-2010-297 and supporting • notes; Published in JHEP 1012, 060 (2010) Yongsheng Gao

  26. ATLAS Work • Search for NP in Dijet Mass Distribution with 36 pb-1 of ATLAS Data at 7 TeV • By H. Bawa, N. Rad, etc. (2010 to 2011) • Search for NP from invariant mass and angular • distributions of energetic jets wrt beam: Event • cleaning, Kinematics/angular variables, UL, … • ULs set for excited quarks, axigluons, Randall- • Meade quantum BH, ……: 2.1 TeV to 3.7 TeV • ATLAS-EXOT-2010-07-002, CERN-PH-2011-030, • ATLAS-CONF-2011-095, and Published in • New J. Phys. 13 (2011) 053044 Yongsheng Gao

  27. ATLAS Work • Search for NP in Dijet Mass Distribution with 4.8 fb-1 of Full 2011 ATLAS Data • By H. Bawa, N. Rad, etc. (2011 to 2012) • Search for NP from invariant mass and angular • distributions of energetic jets wrt beam: Heavy • W, MC validation, analysis optimization, UL, … • ULs set for excited quarks, color octet, heavy • W, string resonances, quantum BH, quark • contact interaction: 1.7 to 7.6 TeV • ATLAS-EXOT-2011-21-002, CERN-PH-EP-2012- • 257, and Published in JHEP01 (2013) 029 Yongsheng Gao

  28. ATLAS Work • New Jet Substructure Variables (Color Connection) for ATLAS Trigger/Physics • By A. Lowe and Y. Gao (2010 to 2012) • Fine-grained calorimetry in ATLAS allows jets • to be studied in much greater detail • Explored jet substructure techniques (color- • connections) between jets to further reject • QCD BKG for NP signals (e.g. H  bb, etc.) • Talks at ATLAS Standard Model, Higgs (HSG5, • HSG7), JetX, Exotics, Jet Trigger Signature, • Trigger Core SW, etc. WG from 2011 to 2012 Yongsheng Gao

  29. ATLAS Work • ATLAS Jet Trigger Algorithm Development, Implementation, and Integration • By A. Lowe (2010 to 2012) • Develop new trigger algorithms for ATLAS Jet • Trigger to boost selection efficiencies for • interesting physics signatures by performing • Jet reconstruction using full detector info. • HLT Online Integration for jet trigger slice, … • Talks at ATLAS Higgs (HSG5, HSG7), JetX, Jet • Trigger Signature, Trigger Core SW, etc. WG • meetings from 2011 to 2012 Yongsheng Gao

  30. ATLAS Work • Search for NP in Dijet Mass Distribution with ATLAS Data of 8 TeV • By H. Bawa, D. Zhang, M. Brazickas (2012 to 2015) • Search for NP from invariant mass and angular • distributions: First search for excited W, MC • validation, analysis optimization, UL, …… • ULs set for excited quarks, color octet, heavy • W, excited W, string resonances, quantum BH, • quark contact interaction: 1.8 to 5.7 TeV • ATLAS-CONF-2012-088 and Published in PRD • 91 (2015) 052005 Yongsheng Gao

  31. ATLAS Work • Search for NP in Dijet Mass Distribution with 3.6 fb-1 ATLAS Data of 13 TeV • By H. Bawa, D. Zhang, M. Brazickas (2015 to 2016) • Search for NP from invariant mass and angular • distributions: MC validation, analysis • optimization, statistical comparison, UL, …… • ULs set for excited quarks, heavy W, excited W, • quantum BH, quark contact interaction, etc: 2.6 • to 17.5 TeV • ATLAS-EXOT-2015-02-001, CERN-PH-EP-2015- • 311, and Published in PLB 754 (2016) 302 Yongsheng Gao

  32. ATLAS Work • Search for Light Dijet Resonances with Trigger-Level Analysis of ATLAS Data • By H. Bawa, D. Zhang, M. Brazickas (2016 to present) • Search for NP from invariant mass and angular • distributions: 1 Billion BKG MC validation, bias • effects on trigger as a function of transverse • momentum threshold, etc. • ULs set for cross sections of excited W and new • processes with sub-TeV masses • ATLAS-COM-CONF-2016-037, submitted to PRL Yongsheng Gao

  33. ATLAS Work • Search for NP in Dijet with 37 fb-1 ATLAS Data of 13 TeV • By H. Bawa, D. Zhang, W. Ding, etc. (2016 to 2017) • Search for NP from invariant mass and angular • distributions: MC validation, analysis • optimization, statistical comparison, UL, …… • ULs set for excited quarks, heavy W, excited W, • quantum BH, quark contact interaction, etc. • ATLAS-CONF-2016-069, ATL-COM-PHYS-2017- • 035 and Published in PRD 96 (2017) 052004 Yongsheng Gao

  34. Collaboration with SDU • Visited ATLAS group of SDU (Prof. Chengguang Zhu, • and others) during summer of 2014 • Dengfeng Zhang (Ph.D student of Prof. Zhu) came to • Fresno to work with our ATLAS group (Dr. Bawa) from • 1/2015 to 12/2015 on ATLAS physics & service work • Dengfeng learned Pythia8/CalcHEP, RootCore, • Distributed computing, etc. and worked on searching • for excited heavy W* in dijet final state • Contributed to MC generation and validation, Data/MC • comparison, analysis optimization, significance • calculation, and upper limits setting, …… Yongsheng Gao

  35. Collaboration with SDU • Dengfeng has given 45+ presentations to ATLAS Dijet • and Jets & Dark Matter Working Group meetings since. • Author of two ATLAS communication notes • Dengfeng became an active member of the ATLAS • DAST (Distributed Analysis Support Team) supervised • by Bawa and has been an independent DAST shifter • (Class 2). He has been taking DAST shifts from SDU • after returning to SDU • After returning to SDU in 12/2015, Dengfeng has been • working with Dr. Bawa on excited W* search, became • an official ATLAS author. Returned to Fresno from • 9/2016 to 9/2017 with SDU Oversea Grant award Yongsheng Gao

  36. ATLAS Work • Dr. Bawa: ATLAS MC Validation Coordinator • since 7/2017. Central role in ATLAS Physics • Modelling Group (PMG) • Development/Validation of MC generators, • analyse samples, final approval of MC requests • of all physics groups • Supervising Wei Ding (Tsinghua University of • China) in validating Madgraph MC generator • MG5_aMC. ATLAS author qualification task of • Wei Ding Yongsheng Gao

  37. ATLAS Work (Sac State) • Dr. Moss: Coordinator of ATLAS ZZ analysis • Published in JHEP 01 (2017) 099. • Serving Real-Time Testing (RTT) coordinator • of Inner Detector Combined Performance • group since 2017 • Study Pixel Module Performance/Failures • ATLAS Diamond Monitor (DBM) • Leading CSU (East Bay, Fresno, Sacramento) • efforts in Phase II ITK Pixel Upgrade in • collaboration with SLAC and Stanford groups Yongsheng Gao

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