Probing supergravity models with the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi><mml:mo>→</mml:mo><mml:mi>s</mml:mi><mml:mi>γ</mml:mi></mml:math>microscope
Probing supergravity models with the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mi>b</mml:mi><mml:mo>→</mml:mo><mml:mi>s</mml:mi><mml:mi>γ</mml:mi></mml:math>microscope
We present a calculation of the branching ratio $B(b\ensuremath{\rightarrow}s\ensuremath{\gamma})$ in two well-motivated supersymmetric models: the minimal SU(5) and the no-scale flipped SU(5) supergravity models. We find that the improved CLEO upper bound [$B(b\ensuremath{\rightarrow}s\ensuremath{\gamma})<5.4\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$ at 95% C.L.] does not yet constrain the minimal SU(5) supergravity model, where $B{(b\ensuremath{\rightarrow}s\ensuremath{\gamma})}_{\mathrm{minimal}}=(2.3\ensuremath{-}3.6)\ifmmode\times\else\texttimes\fi{}{10}^{\ensuremath{-}4}$. In the flipped …