Inclusive rare Λ b decays to photon

Inclusive H b → X s γ decays, with H b a beauty baryon, are treated exploiting an expansion up to the third order in the inverse of the b quark mass m b and to LO in α s , keeping the dependence on the hadron spin. Double distribution d 2 Γ / dy d cos θ P is computed for polarized baryons, with y =...

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Published in:EPJ Web of conferences 2024, Vol.314, p.7
Main Author: Loparco, Francesco
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description Inclusive H b → X s γ decays, with H b a beauty baryon, are treated exploiting an expansion up to the third order in the inverse of the b quark mass m b and to LO in α s , keeping the dependence on the hadron spin. Double distribution d 2 Γ / dy d cos θ P is computed for polarized baryons, with y = 2 E γ / m b , E γ the photon energy and θ P the angle between the baryon spin vector and the photon momentum in the H b rest-frame. Modifications to the photon polarization asymmetry can probe effects of physics beyond the Standard Model. A systematic method to treat the singular terms in the photon energy spectrum obtained by the OPE is proposed.
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title Inclusive rare Λ b decays to photon
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