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Browsing by Author "Vaidya, Rishikesh"

Browsing by Author "Vaidya, Rishikesh"

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  • B--> X_s + gamma in Supersymmetry without R-parity 
    Vaidya, Rishikesh (ARXIV, 2004-11)
    We present a systematic analysis of the decay B--> X_s + gamma at the leading log within the framework of Supersymmetry without R-parity. We point out some new contributions in the form of bilinear-trilinear combination ...
  • Bi-maximal mixing and bilinear R violation 
    Vaidya, Rishikesh (Elsevier, 2002-09)
    We perform a general analytic study of feasibility of obtaining a combined explanation for the deficits in the solar and the atmospheric neutrino fluxes with two large mixing angles in supersymmetric model with bilinear R ...
  • Constraining R Violation from Anomalous Abelian Family Symmetry 
    Vaidya, Rishikesh (ARXIV, 2002-03)
    The patterns of R violation resulting from imposition of a gauged U(1) horizontal symmetry, on the minimal supersymmetric standard model are systematically analyzed. We concentrate on a class of models with integer U(1) ...
  • CP-violation in the mass matrix of heavy neutrinos 
    Vaidya, Rishikesh (Elsevier, 1998-12)
    We discuss the question of CP-violation in the effective Hamiltonian approach in models of leptogenesis through heavy right handed neutrino decays. We first formulate the problem in four component notation and then point ...
  • Flavor changing Higgs decays in supersymmetry with minimal flavor violation 
    Vaidya, Rishikesh (Elsevier, 2007-03)
    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 ...
  • Neutrino anomalies in a gauge mediated model with trilinear R violation 
    Vaidya, Rishikesh (APS, 2002-02)
    The structure of neutrino masses and mixing resulting from trilinear R violating interactions is studied in the presence of gauge mediated supersymmetry breaking. Neutrino masses arise in this model at the tree level through ...
  • Quark Loop Contribution to Neutron EDM from R-parity Violation 
    Vaidya, Rishikesh (ARXIV, 2005-05)
    We present a detailed analysis together with numerical calculations on one-loop contributions to the neutron electric dipole moment from supersymmetry without R parity, focusing on the quark-scalar loop contributions. ...
  • Quark loop contributions to neutron, deuteron, and mercury electric dipole moments from supersymmetry without R parity 
    Vaidya, Rishikesh (APS, 2007-07)
    We present a detailed analysis together with numerical calculations on one-loop contributions to the neutron, deuteron, and mercury electric dipole moment from supersymmetry without R parity, focusing on the quark-scalar ...
  • Radiative B decays in supersymmetry without R parity 
    Vaidya, Rishikesh (APS, 2005-03)
    We present a systematic analysis of all the contributions at the leading log order to the branching ratio of the inclusive radiative decay B→Xs+γ in the framework of supersymmetry without R parity. The relevant set of ...
  • Radiative B decays in Supersymmetry without R-parity 
    Vaidya, Rishikesh (ARXIV, 2004-11)
    We present a systematic analysis of all the contributions at the leading log order to the branching ratio of the inclusive radiative B decay, B --> X_s + gamma in the framework of supersymmetry without R-parity. The relevant ...
  • Some novel contributions to radiative B decays in supersymmetry without R parity 
    Vaidya, Rishikesh (APS, 2005-07)
    We present a systematic analysis at the leading log order of the influence of combination of bilinear and trilinear R parity violating couplings on the decay b→s+γ. Such contributions have never been explored in the context ...
  • Tanbeta enhanced contributions to b--> s gamma in SUSY without R-parity 
    Vaidya, Rishikesh (ARXIV, 2004-11)
    We present a systematic analysis of the decay b --> s gamma at the leading log within the framework of Supersymmetry without R-parity. We point out some new contributions in the form of bilinear-trilinear combination of ...
  • U(1) symmetry and R parity violation 
    Vaidya, Rishikesh (APS, 2000-10)
    The patterns of R violation resulting from the imposition of a gauged U(1) horizontal symmetry on the minimal supersymmetric standard model are systematically analyzed. We concentrate on a class of models with integer U(1) ...
  • Working group report: Beyond the standard model 
    Vaidya, Rishikesh (IAS, 2003)
    The working group on Beyond the StandardModel concentrated on identifying interesting physics issues in models of ‘new physics’ which go beyond the standard model. There were two aspects to this activity. One was to ...
  • Working group report: Collider Physics 
    Vaidya, Rishikesh (Springer, 2006-10)
    This is summary of the activities of the working group on collider physics in the IXth Workshop on High Energy Physics Phenomenology (WHEPP-9) held at the Institute of Physics, Bhubaneswar, India in January 2006. Some of ...
  • Working group report: Flavor physics and model building 
    Vaidya, Rishikesh (Springer, 2006-11)
    This is the report of flavor physics and model building working group at WHEPP-9. While activites in flavor physics have been mainly focused on B-physics, those in model building have been primarily devoted to neutrino ...
  • Working group report: High energy and collider physics 
    Vaidya, Rishikesh (Springer, 2004-12)
    This is a summary of the projects undertaken by the working group I on high energy and collider physics.
  • Working group report: Low energy and flavour physics 
    Vaidya, Rishikesh (Springer, 2004-12)
    This is a report of the low energy and flavour physics working group at WHEPP-8, held at the Indian Institute of Technology, Mumbai, India, during 5–16 January 2004.