Rare decay of the top quark t -> cl(l)over-bar and single top quark production at the ILC

Download

index.pdf

Date

2006-10-01

Author

Frank, Mariana
Turan, İsmail

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

165
views

83
downloads

We perform a complete and detailed analysis of the flavor changing neutral current rare top quark decays t -> cl(+)l(-) and t -> c nu(i)(nu) over bar (i) at one-loop level in the standard model, two Higgs doublet models (I and II), and in minimal supersymmetric standard model (MSSM). The branching ratios are very small in all models, O(10(-14)), except for the case of the unconstrained MSSM, where they can reach O(10(-6)) for e(+)e(-), mu(+)mu(-), and nu i (nu) over bari, and O(10(-5)) for tau(+)tau(-). This branching ratio is comparable to the ones for t -> cV, cH. We also study the production rates of single top and the forward-backward asymmetry in e(+)e(-)-> t (c) over bar and comment on the observability of such a signal at the International Linear Collider.

Subject Keywords

Nuclear and High Energy Physics

URI

https://hdl.handle.net/11511/46762

Journal

PHYSICAL REVIEW D

DOI

https://doi.org/10.1103/physrevd.74.073014

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Rare decay of the top t -> cgg in the standard model Eilam, G; Frank, M; Turan, İsmail (American Physical Society (APS), 2006-03-01) We calculate the one-loop flavor changing neutral current top quark decay t -> cgg in the standard model. We demonstrate that the rate for t -> cgg exceeds the rate for a single gluon emission t -> cg by about 2 orders of magnitude, while the rate for t -> cq (q) over bar q=u is slightly smaller than for t -> cg.
Radiative decays of decuplet to octet baryons in light cone QCD Alıyev, Tahmasıb; Özpineci, Altuğ (Elsevier BV, 2006-01-02) The radiative decays of decuplet to octet baryons are analyzed within the light cone QCD sum rules framework. The electromagnetic transition form factors for these decays are calculated at q(2) = 0 up to twist-4 accuracy for photon wave functions and including first order strange quark mass corrections. A comparison of our results with predictions of lattice theory and existing experimental data is presented. (c) 2005 Published by Elsevier B.V.
Noncommutative nonlinear sigma models and integrability Kürkcüoğlu, Seçkin (American Physical Society (APS), 2008-09-01) We first review the result that the noncommutative principal chiral model has an infinite tower of conserved currents and discuss the special case of the noncommutative CP1 model in some detail. Next, we focus our attention to a submodel of the CP1 model in the noncommutative spacetime A(theta)(R2+1). By extending a generalized zero-curvature representation to A(theta)(R2+1) we discuss its integrability and construct its infinitely many conserved currents. A supersymmetric principal chiral model with and wi...
Radiative decay of the X(3872) as a mixed molecule-charmonium state in effective field theory Cincioglu, E.; Özpineci, Altuğ (Elsevier BV, 2019-10-10) Assuming that X(3872) is a mixture between 2P charmonium and (D) over barD* molecular states with J(PC) = 1(++), an analysis of X(3872) radiative decays into J/psi gamma and psi(2S)gamma is presented. The modification of the radiative branching ratio due to possible constructive or destructive interferences between the meson-loop and the short-distance contact term, which is modeled by a charm quark loop, is shown. The model predictions are shown to be compatible with the experimentally determined ratio of ...
Leading order analysis of neutrino induced dimuon events in the CHORUS experiment Kayis-Topaksu, A.; et. al. (Elsevier BV, 2008-07-21) We present a leading order QCD analysis of a sample of neutrino induced charged-current events with two muons in the final state originating in the lead-scintillating fibre calorimeter of the CHORUS detector. The results are based on a sample of 8910 neutrino and 430 antineutrino induced opposite-sign dimuon events collected during the exposure of the detector to the CERN Wide Band Neutrino Beam between 1995 and 1998. The analysis yields a value of the charm quark mass of m(c) = (1.26 +/- 0.16 +/- 0.09) GeV...

Citation Formats

M. Frank and İ. Turan, “Rare decay of the top quark t -> cl(l)over-bar and single top quark production at the ILC,” PHYSICAL REVIEW D, pp. 0–0, 2006, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46762.