Detecting quark anomalous electroweak couplings at the LHC

作者：Zhao, Sheng-Zhi; Zhang, Bin^*

来源：PHYSICAL REVIEW D, 2016, 93(5): 055037.

DOI：10.1103/PhysRevD.93.055037

• HIGGS-BOSON COUPLINGS
• GAUGE COUPLINGS
• COLLISIONS
• E(+)E(-)
• LIMITS
• GAMMA
• Z'

We study the dimension-6 quark anomalous electroweak couplings in the formulation of linearly realized effective Lagrangian. We investigate the constraints on these anomalous couplings from the pp -> W+W- process in detail at the LHC. With additional kinematic cuts, we find that the 14 TeV LHC can provide a test of anomalous couplings of O(0.1-1) TeV-2. The pp -> ZZ/Z gamma/gamma gamma processes can provide a good complement, as they are sensitive to those anomalous couplings which do not affect the pp -> W+W- process. Those processes that only contain anomalous triple vertices, like pp -> W* -> l nu(l) or pp -> gammaZ* -> l(+)l(-), can improve the sensitivities to O(0.1-1) TeV-2. We also study the kinematic differences between different anomalous couplings and discuss the potential of the chi(2) analysis to distinguish them. Finally, we discuss the detection ability of the possible future 100 TeV proton-proton collider (SPPC) and find that the detection sensitivity is improved by about 1 order of magnitude compared with the LHC.

• 出版日期2016-3-24
• 单位清华大学