Pair production of neutral Higgs particles in the B-LSSM

TL;DR

This paper studies the production of neutral Higgs pairs in the B-LSSM at the LHC, highlighting significant radiative corrections and the influence of additional gauge couplings on the cross section.

Contribution

It provides the first detailed analysis of Higgs pair production in the B-LSSM including radiative corrections and explores the impact of new gauge couplings and vacuum expectation ratios.

Findings

Radiative corrections increase the cross section by about 11% in B-LSSM.

Corrections are only about 4% in MSSM.

Gauge couplings and VEV ratios significantly influence the production cross section.

Abstract

Higgs pair production provides a unique handle for measuring the strength of Higgs self interaction and constraining the shape of the Higgs potential. Including radiative corrections to the trilinear couplings of $CP$-even Higgs, we investigate the cross section of the lightest neutral Higgs pair production in gluon fusion at the Large Hadron Collider in the supersymmetric extensions of the standard model. Numerical results indicate that the correction to the cross section is about 11\% in the B-LSSM, while is only about 4\% in the MSSM. Considering the constraints of the experimental data of the lightest Higgs, we find that the gauge couplings of $U(1)_{B-L}$ and the ratio of the nonzero vacuum expectation values of two singlets also affect strongly the theoretical evaluations on the production cross section in the B-LSSM.