Higgs Bosons of a Minimal Supersymmetric Standard Model with an Extra U(1) at the ILC

Higgs Bosons of a Minimal Supersymmetric Standard Model with an Extra U(1) at the ILC

The Higgs sector of the U(1)-extended supersymmetric model (USSM) is studied by considering the one-loop radiative corrections due to the quark and squark loops of the third generation. The mass of the lightest scalar Higgs boson depends significantly on the effective U(1)0 hypercharges of the Higgs fields. In the USSM, the upper bound on the lightest scalar Higgs boson mass is about 165 GeV at the one-loop level for a reasonable parameter space. In the USSM, the total sum for the couplings of the scalar Higgs boson to a pair of Z bosons, which is normalized to the corresponding SM Higgs coupling, deviates from unity because there is an extra U(1). Thus, the measurement of the total sum of the couplings of the scalar Higgs boson to a pair of Z bosons can be a criterion to distinguish between the USSM and other non-minimal supersymmetric standard models without an extra U(1). We calculate the minimum cross section for at least one of the three scalar Higgs bosons to be detected via the Higgs-strahlung process at the future e+e− p International Linear Collider with s = 500 and 800 GeV.

The Higgs sector of the U(1)-extended supersymmetric model (USSM) is studied by considering the one-loop radiative corrections due to the quark and squark loops of the third generation. The mass of the lightest scalar Higgs boson depends significantly on the effective U(1)0 hypercharges of the Higgs fields. In the USSM, the upper bound on the lightest scalar Higgs boson mass is about 165 GeV at the one-loop level for a reasonable parameter space. In the USSM, the total sum for the couplings of the scalar Higgs boson to a pair of Z bosons, which is normalized to the corresponding SM Higgs coupling, deviates from unity because there is an extra U(1). Thus, the measurement of the total sum of the couplings of the scalar Higgs boson to a pair of Z bosons can be a criterion to distinguish between the USSM and other non-minimal supersymmetric standard models without an extra U(1). We calculate the minimum cross section for at least one of the three scalar Higgs bosons to be detected via the Higgs-strahlung process at the future e+e− p International Linear Collider with s = 500 and 800 GeV.