| 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
Journalen skapades 2024-11-01, och modifierades senast 2024-11-02