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- W2146705034 abstract "We have studied the rare weak radiative hyperon decay Xi degrees -->Sigma degrees gamma in the KTeV experiment at Fermilab. We have identified 4045 signal events over a background of 804 events. The dominant Xi degrees -->Lambdapi degrees decay, which was used for normalization, is the only important background source. An analysis of the acceptance of both modes yields a branching ratio of B(Xi degrees -->Sigma degrees gamma)/B(Xi degrees -->Lambdapi degrees ) = (3.34+/-0.05+/-0.09)x10(-3). By analyzing the final state decay distributions, we have also determined that the Sigma degrees emission asymmetry parameter for this decay is alpha(XiSigma) = -0.63+/-0.09." @default.
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- W2146705034 date "2001-04-09" @default.
- W2146705034 modified "2023-10-16" @default.
- W2146705034 title "Measurement of the Branching Ratio and Asymmetry of the Decay<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mi mathvariant=italic>Ξ</mml:mi><mml:mi>°</mml:mi><mml:mo>→</mml:mo><mml:mi mathvariant=italic>Σ</mml:mi><mml:mi>°</mml:mi><mml:mi mathvariant=italic>γ</mml:mi></mml:math>" @default.
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