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) |