Observation of the electroweak production of Zγ and two jets at 13 TeV and constraints on EFTs

Name: Observation of the electroweak production of Zγ and two jets at 13 TeV and constraints on EFTs
Start: 2021-05-26T13:00:00+08:00
End: 2021-05-26T13:40:00+08:00
Location: Tsung-Dao Lee Library

by Ms Ying (莹) An (安) (Peking University)

Wednesday 26 May 2021, 13:00 → 13:40 Asia/Shanghai

Tsung-Dao Lee library/Fourth Floor-402 - 402# Meeting Room (Tsung-Dao Lee Library)

Tsung-Dao Lee library/Fourth Floor-402 - 402# Meeting Room

Tsung-Dao Lee Library

Description

Zoom: (PIN: 2021)

https://cern.zoom.us/j/67009490038?pwd=TWlJSUZvNUgwT0pzczJlTDJnbXIvQT09

Abstract:

The first observation of the electroweak (EW) production of a Z boson, a photon, and two forward jets (Zγjj) in proton-proton collisions at a center-of-mass energy of 13 TeV is presented. A data set corresponding to an integrated luminosity of 137 fb−1, collected by the CMS experiment at the LHC in 2016–2018 is used. The fiducial cross section measured for EW Zγjj is measured to be σEW = 5.21 ± 0.52 (stat) ± 0.56 (syst) fb = 5.21 ± 0.76 fb. Single-differential cross sections in photon, leading lepton, and leading jet transverse momenta, and double-differential cross sections in mjj and |∆ηjj| are measured. Exclusion limits on anomalous quartic gauge couplings M0−5,7 and T0−2,5−9 in the effective field theory framework at 95% confidence level are reported.

CV:

2017.09~2022.06, PhD student, Peking Univ.

Working on CMS experiment under the supervision of Prof. Yajun Mao and Prof. Qiang Li.

2013.09~2017.06, Wuhan University, Bachelor's degree of Physics

Organised by

SJTU CPG Faculty