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Testing $Z$ boson rare decays $Z\to H 1 \gamma, A 1 \gamma$ with $(g-2) \mu$, $M W$, and $BR(h {\rm SM}\to Z\gamma)$ in the NMSSM by Bisal, Subhadip; Das, Debottam is a scholarly article available to read on EtoBox.

What is Testing $Z$ boson rare decays $Z\to H 1 \gamma, A 1 \gamma$ with $(g-2) \mu$, $M W$, and $BR(h {\rm SM}\to Z\gamma)$ in the NMSSM about?

We study the rare decay process of $Z$ boson into photon, accompanied by a CP-even or CP-odd scalar. We present the analytical delineation of the processes through the model-independent parametrizations of the new physics couplings and, finally, consider the Next-to-Minimal Supersymmetric Standard Model to mark out the parameter space where the branching fraction can have the maximum value. As a part of the necessary phenomenological and experimental cross-checks, we aim to fit the anomalous magnetic moment of the muon and $W$ boson mass anomaly through the supersymmetric contributions. We also find that the decays $Z\to H_1 \gamma, A_1 \gamma$ can serve as an excellent complementary test to $BR(h_{\rm SM}\to Z\gamma)$. In fact, to facilitate future searches, we unveil a few benchmark points that additionally satisfy the deviation of $BR(h_{\rm SM}\to Z\gamma)$ from the SM value based on the recent measurements of ATLAS and CMS. Future proposals such as ILC, CEPC, and FCC-ee are anticipated to operate for multiple years, focusing on center-of-mass energy near the $Z$ pole. Consequently, these projects will be capable of conducting experiments at the Giga-$Z$ ($10^{9}$ of $Z$ bosons

Author

Bisal, Subhadip; Das, Debottam

Published

2023

Language

EN