Higgs boson production in the $U(1)_{B-L}$ model at the ILC

TL;DR

This paper studies Higgs boson production in a minimal $U(1)_{B-L}$ extension of the Standard Model at the ILC, analyzing cross sections and potential observability of signals in various production channels.

Contribution

It provides detailed predictions for Higgs production cross sections and corrections in the $U(1)_{B-L}$ model at the ILC, highlighting the potential observability of single Higgs processes.

Findings

Single Higgs production processes may be observable at the ILC.

Double Higgs production signals are likely below the observable threshold.

Effects of the $U(1)_{B-L}$ extension could be detectable in certain channels.

Abstract

In the framework of the minimal $U(1)_{B-L}$ extension of the Standard Model, we investigate the Higgs boson production processes $e^{+}e^{-}\rightarrow ZH$, $e^{+}e^{-}\rightarrow \nu_{e}\bar{\nu_{e}}H$, $e^{+}e^{-}\rightarrow t\bar{t}H$, $e^{+}e^{-}\rightarrow ZHH$ and $e^{+}e^{-}\rightarrow \nu_{e}\bar{\nu_{e}}HH$ at the International Linear Collider (ILC). We present the production cross sections, the relative corrections and compare our results with the expected experimental accuracies for Higgs decay channel $H\rightarrow b\bar{b}$. In the allowed parameter space, we find that the effects of the three single Higgs boson production processes might approach the observable threshold of the ILC, and that the Higgs signal strengths $\mu_{b\bar{b}}$ of the two double Higgs boson production processes are all out of the observable threshold of the ILC so that the effects will be difficult to be observed at the ILC.