Branching ratio and CP violation in semi-inclusive flavor-changing top decays

Abstract

The top quark decay process $\tcups$ is studied in the Standard Model and the Minimal Supersymmetric Standard Model with conserved and violated $R-$parity. In dealing with the heavy quarkonium, $\ups$, production, we take both color-singlet and -octet mechanisms into consideration. With numerical analysis it is found that within the Standard Model the decay rate of the concerned process is beyond the border of reachable level of the next round of experiment, though it is much larger than that of the rare top decays, while extra new contributions from beyond the Standard Model could enhance the decay rate by several orders. It is also noticed that a precise measurement of the charged Higgs mass without $\tan \beta$ dependence is possible via this process.

16 pages

References in corpus (7)

• Topological Defects and Interactions in Nematic Emulsions
• A new evaluation of the t->cH decay width in the standard model
• Flavor-changing Top Quark Decays In R-Parity Violating SUSY
• New Supersymmetric Contributions to $t->cV$
• Flavour changing top decays in supersymmetric extensions of the standard model
• Supersymmetric QCD flavor changing top quark decay
• Direct CP violation in semi-inclusive flavor-changing neutral current decays in the MSSM without $R-$parity

Cited by in corpus (2)

• Rare and exclusive few-body decays of the Higgs, Z, W bosons, and the top quark
• Top-quark decay into Upsilon-meson