The flavor changing top decay t-->c+sneutrino or sneutrino-->t+c(bar) in the MSSM without R-parity

Abstract

Widths for the new flavor changing top quark decay t-->c+sneutrino or for the reversed sneutrino decay sneutrino-->t+c(bar) are calculated in the MSSM without R-parity conservation. For large \tanβ, e.g., \tanβ~ m_t/m_b ~ 40, Br(t-->c+sneutrino) > 10^{-5} or Br(sneutrino-->t+c(bar)) > 10^{-6} in a relatively wide range of the supersymmetric parameter space as long as there is more than one non-zero R-parity violating coupling. In the best cases, with a typical squark mass around 100 GeV, we find that Br(t-->c+sneutrino) ~ 10^{-4} - 10^{-3} or Br(sneutrino-->t+c(bar)) ~ 10^{-5} - 10^{-4}. For \tanβ~ O(1) the corresponding branching ratios for both top or sneutrino decays are too small to be measured at the LHC. Therefore, the decays t-->c+sneutrino or sneutrino-->t+c(bar) appear to be sensitive to \tanβand may be detected at the LHC. The branching ratios of the corresponding decays to an up quark instead of a charm quark, e.g., t-->u+sneutrino or sneutrino-->t+u(bar), may also be similar.

23 pages, plain latex, 8 figures embadded in the text using epsfig

References in corpus (17)

• Phenomenology of Two Higgs Doublet Models with Flavor Changing Neutral Currents
• A new evaluation of the t->cH decay width in the standard model
• $R$-Parity Violation in Flavor Changing Neutral Current Processes and Top Quark Decays
• Flavor-changing Top Quark Decays In R-Parity Violating SUSY
• New Supersymmetric Contributions to $t->cV$
• Flavour Changing Neutral Currents, Weak-Scale Scalars and Rare Top Decays
• $R$-parity-Violating Supersymmetric Yukawa Couplings: A Mini-review
• Flavour changing top decays in supersymmetric extensions of the standard model
• Flavour changing top quark decay within the minimal supersymmetric standard model
• D- and τ-Decays: Placing New Bounds on R-Parity--Violating Supersymmetric Couplings
• Probing the Flavor-Changing tc vertex via Tree-Level Processes: e+e- -> t bar-c nu_e bar-nu_e, t bar-c e+ e- and t -> c W+ W-
• Implications of a W^+W^- (ZZ) - Higgs - t c-bar$ Interaction for e^+e^- -> t c-bar ν_e ν_e-bar, t c-bar e^+ e^-, t c-bar Z and for t -> cW^+W^-, cZZ in a Two Higgs Doublet Model
• CP Violation In Single Top Production And Decay Via p p-bar -> t b-bar +X -> W^+ b b-bar +X Within The MSSM: A Possible Application For Measuring \arg(A_t) At Hadron Colliders
• Supersymmetric QCD flavor changing top quark decay
• CP in R-parity Violating Models
• R-parity violation and uses of the rare decay sneutrino-->gamma+gamma in hadron and photon colliders
• R-Parity Violating SUSY Model

Cited by in corpus (13)

• Top-quark rare decay $t\to ch$ in R-parity-violating SUSY
• Loop Induced Flavor Changing Neutral Decays of the Top Quark in a General Two-Higgs-Doublet Model
• Top quark forward-backward asymmetry at the Tevatron: a comparative study in different new physics models
• New physics effects on top quark spin correlation and polarization at the LHC: a comparative study in different models
• Flavor changing single top quark production channels at e^+e^- colliders in the effective Lagrangian description
• Probing R-violating top quark decays at hadron colliders
• Signals from R-parity violating top quark decays at LHC
• Rare three-body decay t -> c h gamma in the standard model and the two-Higgs doublet model
• Flavor changing neutral decay effects in models with two Higgs boson doublets: Applications to LHC Physics
• Single sneutrino production at hadron colliders
• Effects of lepton number violating interactions on $t\bar{t}$ production at NLC
• Single sneutrino production in $\gamma \gamma$ collisions
• Single superparticle production via $\gamma \gamma$ collision with explicit R-parity violation