arXiv subjects

Dilip K. Ghosh

Publications and source records attributed to Dilip K. Ghosh.

3 recordsLinked to original sources

arXiv2009

Doubly Charged Higgsinos at Tevatron

Several supersymmetric models with extended gauge structures, motivated by either grand unification or by neutrino mass generation, predict light doubly-charged Higgsinos. In this work we study the signals of doubly-charged Higgsinos at the Tevatron in both pair-- and single--production modes, and show that it is possible, especially from the events containing same-sign same-flavor isolated leptons, to disentangle the effects of doubly-charged Higgsinos in the Tevatron data.

hep-ph↗

arXiv2007

Flavor Changing Higgs Decays in Supersymmetry with Minimal Flavor Violation

We study the flavor changing neutral current decays of the MSSM Higgs bosons into strange and bottom quarks. We focus on a scenario of minimum flavor violation here, namely only that induced by the CKM matrix. Taking into account constraint from $b\to s γ$, $δρ$ as well as experimental constraints on the MSSM spectrum, we show that the branching ratio of $(Φ\to b\bar{s})$ and $(Φ\to \bar{b}s)$ combined, for $Φ$ being either one of the CP even Higgs states, can reach the order $10^{-4}$-$10^{-3}$ for large $\tanβ$, large $μ$, and large $A_t$. The result illustrates the significance of minimal flavor violation scenario which can induce competitive branching fraction for flavor changing Higgs decays. This can be compared with the previous studies where similar branching fraction has been reported, but with additional sources of flavor violations in squark mass matrices. We also discuss some basic features of the flavor violating decays in the generic case.

hep-ph↗

arXiv2004

Summary of the Activities of the Working Group I on High Energy and Collider Physics

This is a summary of the projects undertaken by the Working Group I on High Energy Collider Physics at the Eighth Workshop on High Energy Physics Phenomenology (WHEPP8) held at the Indian Institute of Technology, Mumbai, January 5-16, 2004. The topics covered are (i) Higgs searches (ii) supersymmetry searches (iii) extra dimensions and (iv) linear collider.

hep-ph↗