arXiv subjects

Minoru Tanaka

Publications and source records attributed to Minoru Tanaka.

56 records · Page 4Linked to original sources

arXiv1994

Neutral Scalar Higgs Masses and Production Cross Sections in an Extended Supersymmetric Standard Model

Upper bounds on the three neutral scalar Higgs masses are considered in the supersymmetric standard model with a gauge singlet Higgs field. When the lightest Higgs is singlet-dominated the second lightest Higgs is shown to lie near or below the theoretical upper bound on the lightest Higgs mass. We also consider detectability of these Higgs bosons at a future $e^+ e^-$ linear collider with $\sqrt{s}\sim 300 $ GeV and show that at least one of the neutral scalar Higgs has a production cross section larger than 0.04~pb.

hep-ph↗

arXiv1992

Chiral Structure of the $b\rightarrow c$ Charged Current and the Semileptonic $Λ_b$ Decay

Using the heavy quark effective theory, chiral structure of the $b\rightarrow c$ charged current can be determined by the semileptonic $Λ_b$ decay with satisfactory theoretical accuracy. We define an asymmetry which is sensitive to the chirality of the $b\rightarrow c$ charged current. We show that this asymmetry has no theoretical uncertainty in the heavy quark limit. It is also shown that $1/m_c$ correction to this asymmetry is small and disappears at the kinematical point of zero momentum transfer.

hep-ph↗