2017/11/30 by Ruibo Li, Xiao-Min Shen, XiaoMin Shen +4 · 1 citation
Physics and Astronomy · #Boson #Collider #Combinatorics #Gauge boson #Gauge theory #Hadron #High-Energy Particle Collisions Research #Lambda #Large Hadron Collider #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Quantum Chromodynamics and Particle Interactions #Quantum mechanics #Vertex (graph theory) #hep-ph
paper · pdf · doi:10.1103/physrevd.97.075043
published as Phys. Rev. D 97, 075043 (2018) · 15 pages, 8 figures
openalex created_date 2017/12/04 · openalex publication_date 2018/04/30 · arxiv created 2018/05/03 · arxiv updated 2018/05/09 · openalex updated_date 2026/08/05
The precision measurement of the WW\ensuremathγ vertex at the future Large Hadron electron Collider (LHeC) at CERN is discussed in this paper. We propose to measure this vertex in the e^\ensuremath-p\ensuremath→e^\ensuremath-W^\ifmmode±\else\textpm\fij channel as a complement to the conventional charged current \ensuremathνe\ensuremathγj channel. In addition to the cross section measurement, \ensuremathχ2 method studies of angular variables provide powerful tools to probe the anomalous structure of triple gauge boson couplings. We study the distribution of the well-known azimuthal angle between the final state forward electron and jet in this vector-boson fusion process. On the other hand, full reconstruction of leptonic W decay opens a new opportunity to measure W polarization that is also sensitive to the anomalous triple gauge boson couplings. Taking into consideration the superior determination of parton distribution functions based on future LHeC data, the constraints of \ensuremathλ_\ensuremathγ and \mathrm\ensuremathΔ\ensuremathκ_\ensuremathγ might reach up to O(10^\ensuremath-3) level in the most ideal case with the 2--3 ab^\ensuremath-1 data set, which shows a potential advantage compared to those from LHC and Large Electron-Positron Collider (LEP) data.