PQCD Calculation for $Λ_{b}\to Λγ$ in the Standard Model

Details PQCD Calculation for $Λ_{b}\to Λγ$ in the Standard Model PQCD Calculation for $Λ_{b}\to Λγ$ in the Standard Model

2006-06-01

arxiv.org/abs/hep-ph/0606025v4

Phys.Rev. D74 (2006) 034026

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 1 figure and 5 tables. Replaced by new version

Scientific paper

10.1103/PhysRevD.74.034026

We calculate the branching ratio of $\Lambda_b \to \Lambda \gamma$ in the standard model using the PQCD method. The predicted branching ratio $B(\Lambda_b \to \Lambda \gamma)$ is about $(4.3\sim 8.6)\times 10^{-8}$, with reasonable parameter ranges in the heavy baryon distribution amplitude. This branching ratio is much smaller than those obtained in other hadronic model calculations. Future experimental data can provide important information on applicability of the PQCD method to heavy baryon radiative decay.

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