Simulation-based inference in the search for CP violation in leptonic WH production-Reference-Cited by-同舟云学术

Simulation-based inference in the search for CP violation in leptonic WH production

Published:2024-04-03 Issue:4 Volume:2024 Page:
ISSN:1029-8479
Container-title:Journal of High Energy Physics
language:en
Short-container-title:J. High Energ. Phys.

Author:

Barrué Ricardo^ORCID,Muíño Patricia Conde^ORCID,Dao Valerio^ORCID,Santos Rui^ORCID

Abstract

Abstract Sources of CP violation beyond the Standard Model (BSM) are required to explain the baryonic asymmetry of the Universe. In this work, we study BSM CP-violating components in the HWW interaction in WH production, parametrized by an effective dimension-6 CP-odd operator. We explore a machine learning simulation-based inference method that estimates a detector-level optimal observable — SALLY — comparing it with energy-dependent and angular observables, exploring different binnings for their distributions. We show that in regions of phase space where the interference between SM and the effective operator dominates, the SALLY observable leads to optimal limits. In regions where effects of the quadratic term of the effective operator start becoming dominant, such an observable still leads to optimal limits. This work aims to test current multivariate techniques and inform analysis strategies for LHC Run 3 and beyond.

Publisher

Springer Science and Business Media LLC

Link

https://link.springer.com/content/pdf/10.1007/JHEP04(2024)014.pdf

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