ATLAS in Berkeley Ian Hinchliffe “Particle physics is the unbelievable in pursuit of the unimaginable. T o pinpoint the smallest fragments of the Universe you have to build the biggest machine in the world. T o recreate the fjrst millionths of a second of creation you have to focus energy on an awesome scale.” The Guardian 1
Our experiment is in Switzerland 2
LBNL ATLAS Group members Permanent staff/faculty (RED at CERN) — Fabio Cerutti, Kevin Einsweiler, Sandra Ciocio, Maurice Garcia-Sciveres, Heather Gray, Ian Hinchliffe, Carl Haber, Zach Marshall, Simone Pagan-Griso, Marjorie Shapiro, Juerg Beringer, Wei Ming Yao, Michael Barnett Postdocs (RED at CERN) Laura Jeanty, Karolos Potamianos, Hongtau Yang, Haichen Wang, Christian Ohm, Simon Viel, Timon Heim, Andrea Gabrielli, Pelian Liu, Ben Nachmann. • Phd students Brian Amadio, Rebecca Carney, Jennet Dickenson, Emily Duffield, Patrick McCormack, Sai Neha Santpur, Victoria Wallengen • Engineers – Neal Hartman (at CERN), Eric Anderssen, Dario Gnani • Technicians – Tom Johnson, Kurt Krueger, Ken Wilson, Mario Cepeda, Rhonda Witharm – Undergrads: physics, engineering • Software engineers — Calafiura, Leggett, Lavrijsen, Tsulaia, Farrell Largest US group with students. We are based at LBNL not campus Most of our senior members are not faculty 3
What is LHC? (even my mother knows this) 27 km circumferance 1200 dipole magnets 8.3 Tesla 15m long 1.8 degrees K 4
What is ATLAS? Half the size of this Not this ATLAS! 5
6
Brief history 1990: first ideas 1994: full design 1997: construction start 2003:installation start 2008: first beam Higgs event 2010: first collisions (7 TeV) 2012 Higgs discovered 2015: first 13 TeV collisions 2017: new tracker designed 2022: new tracker built 7
The ATLAS collaboration 427 publications since Jan 2011 8
2 1 0 2 4 y l u J
Data taking this year at 13 TeV 10
What is Berkeley doing on ATLAS? • Built (2/3 of) the most precise part of the tracking system – R&D for upgrade going on now (see lab tour). Entire tracker will be replaced – Vital for tracker upgrade to deal with higher event rates • Responsible for software framework • Physics analysis going on now – Higgs mass measurements – Higgs decay properties – Measurement of “W scattering” – 4 th generation quark searches – Supersymmetry searches – Strong gravity searches 11
What can you do on ATLAS? • Detector operations at CERN (all students reside there for >1 year) • New software to fully exploit the detector • Detector R&D and construction for upgraded tracker (at LBNL) • Physics analysis – Data taking started again at higher energy in 2015: 30 times more data will be taken in 2016-2018. • Supersymmetry, new physics • Find dark matter • Measure detailed properties of Higgs boson – Is it really the Standard Model Higgs? 12
ATLAS Ph.D thesis done since 2011 Lauren Tompkins : A Measurement of the proton-proton inelastic scattering cross-section at s =7 TeV with the ATLAS detector at the LHC Michael Leyton: Minimum Bias Measurements with the ATLAS Detector at the CERN Large Hadron Collider Maxwell Scherzer: Measurement of the Υ(1S) Production Cross Section in Proton-Proton Collisions at Center of Mass Energy 7 TeV Seth Zenz: Properties of Jets Measured with Charged Particles with the ATLAS Detector at the Large Hadron Collider Andre Bach: Search for Pair Production of a New b′ Quark that Decays into a Z Boson and a Bottom Quark with the ATLAS Detector at the LHC Joe Virzi A Measurement of the Underlying Event Distributions in Proton-Proton Collisions at s√ = 7 TeV in Charged-Particle Jet Events using the ATLAS Detector at the Large Hadron Collider Louise Skinnari: A Search for Physics Beyond the Standard Model using Like-Sign Muon Pairs in pp Collisions at s√=7 TeV with the ATLAS Detector Peter Loscutoff: Search for resonant WZ to lvll production using 13 fb−1 in s√ = 8 TeV p-p collisions with the ATLAS detector Alexander Sood: First Observation of WW scattering at LHC Anna Ovcharova: Measurement of top quark production at high transverse momentum at 8 TeV David Yu: Jackie Brosamer: Properties of jets in events with top quarks Robert Clarke: Search for Higgs decay to Tova Holmes: Brad Axen: 13
ATLAS Ph.D theses ongoing Other students whose theses are some time away and topics not known. Most will use data taken before November 2018 Brian Amadio Jennet Dickenson Emily Duffield Some of you ? Questions? Contact me I_Hinchliffe@lbl.gov 14
Recommend
More recommend
