Probing the helicity structure of $b \to s γ$ in $Λ_b \to Λγ$

Details Probing the helicity structure of $b \to s γ$ in $Λ_b \to Λγ$ Probing the helicity structure of $b \to s γ$ in $Λ_b \to Λγ$

1997-10-08

arxiv.org/abs/hep-ph/9710287v1

Acta Phys.Polon.B28:2489-2493,1997

Physics

High Energy Physics

High Energy Physics - Phenomenology

Latex, 6 pages, 1 postscript figure included, uses epsf. Presented at XXIst School of Theoretical Physics, Ustron (Poland), Se

Scientific paper

We investigate the rare decay $\Lambda_b \to \Lambda \gamma$ which receives both short and long distance contributions. We estimate the long distance contributions and find them very small. The form factors are obtained from $\Lambda_c \to \Lambda \ell \bar{\nu}_\ell$ using heavy quark symmetry and a pole model. The short distance piece opens a window to new physics and we discuss the sensitivity of $\Lambda_b \to \Lambda \gamma$ to such effects.

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