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We study the contributions of physics beyond the standard model to theshort-distance s->d gamma transition in Omega^- -> Cascade^- gamma decay. Weexplore the possibility that the new interactions remove the chiralitysuppression which occurs in the standard-model contribution to s->d gamma andenhance the effect of this coupling by factors of a heavy-mass scale relativeto the s-quark mass. We consider two of the popular models for new physics,and, after taking into account constraints from other processes, find thattheir contributions can be larger than that of the standard model by up to afew times, which suggests that the yet unobserved Omega^- -> Cascade^- gammadecay is a likely probe for new physics.Comment: 9 pages, latex, few minor changes and additions, to appear in Phys.  Rev.

physical review. d. particles, fields, gravitation, and cosmology/physical review. d. particles and fields

New physics and short-distance<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mrow><mml:mover><mml:mrow><mml:mi>s</mml:mi></mml:mrow><mml:mrow><mml:mo>→</mml:mo></mml:mrow></mml:mover></mml:mrow></mml:mrow><mml:mi>d</mml:mi><mml:mi>γ</mml:mi></mml:math>transition in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>Ω</mml:mi></mml:mrow><mml:mrow><mml:mi>−</mml:mi></mml:mrow></mml:msup></mml:…

New physics and short-distances→dγtransition inΩ−