====== TTP97-06 Flavour Changing Neutral Current Decays of Heavy Baryons: The Case $\Lambda_b \to \Lambda \gamma$ ======
 
 
   <hidden TTP97-06  Flavour Changing Neutral Current Decays of Heavy Baryons: The Case $\Lambda_b \to \Lambda \gamma$ > 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. 
 
 </hidden>
|**T. Mannel and S. Recksiegel **  | 
|** J. Phys. G: Nucl. Part. Phys. 24 979-990 1998  **  |
| {{preprints:1997:ttp97-06.pdf|PDF}} {{preprints:1997:ttp97-06.ps|PostScript}} [[http://arxiv.org/abs/hep-ph/9701399|arXiv]]   |
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