Polarization Asymmetries in Gamma E Collisions and Triple Gauge Boson Couplings Revisited
Polarization Asymmetries in Gamma E Collisions and Triple Gauge Boson Couplings Revisited

Author:

Publisher:

Published: 1999

Total Pages: 5

ISBN-13:

DOWNLOAD EBOOK

The capability of the NLC run in the [gamma]e collision mode to probe the CP-conserving [gamma]WW and [gamma]ZZ anomalous couplings through the use of the polarization asymmetry is reviewed. When combined with other measurements, very strong constraints on both varieties of anomalous couplings can be obtained. We show that these bounds are complementary to those that can be extracted from data taken at the LHC.

Measurement of the Z[gamma] Production Cross Section in Pp Collisions at 8 TeV and Search for Anomalous Triple Gauge Boson Couplings
Measurement of the Z[gamma] Production Cross Section in Pp Collisions at 8 TeV and Search for Anomalous Triple Gauge Boson Couplings

Author:

Publisher:

Published: 2015

Total Pages: 39

ISBN-13:

DOWNLOAD EBOOK

The cross section for the production of Z[gamma] in proton-proton collisions at 8 TeV is measured based on data collected by the CMS experiment at the LHC corresponding to an integrated luminosity of 19.5 fb-1. Events with an oppositely-charged pair of muons or electrons together with an isolated photon are selected. Furthermore, the differential cross section as a function of the photon transverse momentum is measured inclusively and exclusively, where the exclusive selection applies a veto on central jets. These observed cross sections are compatible with the expectations of next-to-next-to-leading-order quantum chromodynamics. As a result, limits on anomalous triple gauge couplings of ZZ[gamma] and Z[gamma][gamma] are set that improve on previous experimental results obtained with the charged lepton decay modes of the Z boson.