arXiv subjects

Lu Gongru

Publications and source records attributed to Lu Gongru.

2 recordsLinked to original sources

arXiv1999

Rare decays $B \to X_{s,d} ν\bar ν$ and $B_{s,d} \to l^+ l^-$ in the Topcolor-assisted Technicolor Model

We calculate the contributions to the rare decays $B \to X_{s,d} ν\bar ν$ and $B_{s,d} \to l^+l^-$ from one-loop $Z^0$-penguin diagrams in the framework of Topcolor-assisted Technicolor Model. Within the parameter space, we find that: (a) the new contribution from technipions is less than 2% of the standard model prediction; (b) the top-pions can provide a factor of 10 to 30 enhancement to the ratios in question; (c) the topcolor-assisted technicolor model is consistent with the current experimental data.

hep-ph↗

arXiv1999

The rare decays $B \to X_{s,d} ν\bar ν$ and $B_{s,d} \to l^+l^- $ in the Multiscale Walking Technicolor Model

We calculate the contributions to the rare B-decays, $B \to X_{s,d} ν\bar ν$, $B_{s,d} \to l^+l^- $ from the unit-charged technipions. Within the considered parameter space we find that: (a) the enhancements to the branching ratios in question can be as large as three orders of magnitude; (b) the ALEPH data of $B \to X_s ν\bar ν$ lead to strong mass bounds on $m_{p1}$ and $m_{p8}$: $m_{p8} \geq 620, 475 GeV$ for $F_Q=40GeV$ and $m_{p1}=100, 400 GeV$ respectively. (c) the CDF data of $B_s \to μ\bar μ$ lead to a relatively weak limit: $m_{p8} \geq 320 GeV$ for $F_Q=40GeV$ and $m_{p1}=200 GeV$.

hep-ph↗