Time & Place: Sep. 29, 10:00am, Room 9409
Speaker: Prof. Shu Li (李数), Tsung-Dao Lee Institute & Shanghai Jiao Tong
University
Title：Multi-Boson Interactions at the ATLAS experiment
Abstract: The multi-boson production measurement using ATLAS pp
collision data at √s = 7/8/13 TeV is a important way of probing the
electroweak interactions in Standard Model (SM). The measurements not
only precisely verify the SM theory high order predictions but also
search for new physics through the triple/quartic gauge-boson vertices
via model independent anomalous couplings and for heavy resonances
through "exotic" kinematics. Besides, the SM multi-boson productions are
also the irreducible backgrounds of dibosons produced by the decays of
Higgs and other exotic resonances induced by new physics beyond SM. This
seminar presents two major multiboson physics sectors in ATLAS Run-I and
Run-II including: both the SM multi-boson production (and scattering)
cross section precision measurements with selective topics of 1st Vector
Boson Scattering observations at LHC
(http://atlas.cern/updates/physics-briefing/weak-lightsabers
<http://atlas.cern/updates/physics-briefing/weak-lightsabers>) and the
new physics search in Z+photon final states, which independently
investigated and resolved the 750GeV di-photon excess in 2016, plus the
1st ever H+photon resonance search in the collider experiments, which
has been the very recent ATLAS Physics briefing highlight and LHCC open
session highlight.
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CV: Prof. Shu Li is the 1st T.D. Lee Junior Fellow at the Tsung-Dao Lee
Institute & Shanghai Jiao Tong University. He received his PhD in 2012
from University of Science and Technology of China and Centre de
Physique des Particules de Marseille, France, under the supervision of
Prof. Zhengguo Zhao and Dr. Emmanuel Monnier. His PhD thesis involves
the 1st di-boson PRL publication in ATLAS on the observation of di-boson
WW process, which greatly promoted the 2012 Higgs discovery through WW
final states. From 2013.2 to 2017.8, he worked as a postdoctoral
research associate at Duke University and continued his leading role in
ATLAS multi-boson physics in general. He led and completed ATLAS Run-1
1st pure electroweak rare process measurement in Z+photon+jj final state
and Run-2 1st heavy resonance search in full-hadron final states of
Z+photon, which helped to resolve the 750GeV di-photon puzzle in 2016.
Shu Li has been leading various important physics and performance
groups, being the conveners of: MC validation group (2015.12~2017.1), SM
Electroweak physics group (2017.4~2018.3), Generator Development and
Tuning group (2018.4~Present), and has been promoted recently to co-lead
the LHC-wide (ATLAS-CMS-LHCb) electroweak multi-boson working group at
CERN starting from 2018.10 onwards.
