Work

Optimal estimation of Higgs-gauge boson couplings at the future e + e − colliders

Year: 2025

Type: article

Abstract: The proposed e + e − collider offers an ideal environment for precise estimation of Higgs boson properties which are of utmost importance to validate the Standard Model of particle physics. We investigate h V V couplings, where V ∈ { Z , γ } with single Higgs production associated with Z boson at the proposed e + e − machine with s = 250 GeV , within the Standard Model effective field theory framework. We employ the recoil mass of the dilepton system, to select the signal phase space, i.e, Z h → l + l − b b ¯ events. The constraints on the Wilson coefficients (WCs) are obtained using the optimal observable technique. On comparison with the current experimental limits at 68% CL with 138 fb − 1 luminosity, our limits are tighter by a factor ranging from 1.5–10 for C P -even operators, while C P -odd WCs shows comparable limits.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/8vz9-dh9v

Authors: Subhaditya Bhattacharya, Amir Subba, Abhik Sarkar

Institution: Indian Institute of Technology Guwahati

Language: English

Topic: Particle physics theoretical and experimental studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: Arthritis National Research Foundation

Award: G1914638653