Nothing Special   »   [go: up one dir, main page]

CERN Accelerating science

ATLAS Note
Report number ATL-PHYS-PUB-2024-019
Title Exploring CP-sensitive STXS bins in the HWW decay channel by the ATLAS experiment
Corporate Author(s) The ATLAS collaboration
Collaboration ATLAS Collaboration
Publication 2024
Imprint 01 Nov 2024
Number of pages mult.
Note All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PUBNOTES/ATL-PHYS-PUB-2024-019
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN LHC ; ATLAS
Free keywords Charge parity ; STXS ; HWW ; VBF ; ggF ; HIGGS
Abstract The current STXS stage-1.2 binning is not sensitive to the charge-parity properties of the Higgs boson. Parallel to the ongoing effort to finalize the STXS stage-1.3 bins, the ATLAS experiment has studied the potential for measuring CP-sensitive STXS-like bins the $H\rightarrow WW^*$ decay channel. This can be done by measuring cross-sections in bins of the signed azimuthal separation between the two leading jets, and by considering both the ggF and VBF production modes, CP-odd anomalous modifications to both Higgs-$V$ and Higgs-gluon effective couplings may be studied simultaneously. These anomalous effects are characterized by Effective Field Theory operators in the Warsaw basis and considering only the linear term from the SM-BSM interference. This note focuses on the motivation of the STXS-like binning and provides an overview of how CP violation may be probed using this strategy.
Scientific contact person Tackmann, K., (kerstin.tackmann@cern.ch)

Corresponding record in: Inspire


 Record created 2024-11-01, last modified 2024-11-02