Event calendar file
20-26 October 2011
León, Guanajuato
Mexico/General timezone
- workshopdpyc2011@fisica.ugto.mx
Support
Electroweak and Flavor Physics
Higgs mediated flavor-violating transitions of the top quark
Abstract content
Flavor violating $tu_iH$ vertex induces top quark couplings $tc\gamma$ and $tu_i\gamma \gamma$ ($u_i=u,c$) at the one-loop level, in the effective Yukawa sector through dimension six $SU_L(2)\times U_Y(1)$-invariant operators. The $t\to cH$ and $t\to c\gamma \gamma$ decays can reach branching ratios about $5\times 10^{-3}$ and $10^{-4}$, respectively. As for $tc$ production, it is found that, due to the presence of a resonant effect in the convoluted cross section $\sigma(e^+e^-\to \gamma \gamma \to t\bar{c}+\bar{t}c)$, about $(0.5 - 2.7)\times 10^{3}$ $tc$ events may be produced at the ILC for $m_H \sim m_t$.
