arxiv: hep-lat/9709028 · v1 · submitted 1997-09-11 · ✦ hep-lat · hep-ph

First Lattice Study of Semileptonic Decays of Lambda_b and Xi_b Baryons

UKQCD Collaboration , K.C. Bowler , R.D. Kenway , L. Lellouch , J. Nieves , O. Oliveira , D.G. Richards , C.T. Sachrajda

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N. Stella P. Ueberholz

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classification ✦ hep-lat hep-ph

keywords baryonslatticedecaysfirstsemileptonicactionapproximationb-quark

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We present the results of the first lattice study of semileptonic decays of baryons containing a b-quark. Predictions for the decay distributions are given and the Isgur-Wise functions for heavy baryons are computed, for values of the velocity transfer up to about omega=1.2. The computations are performed on a 24^3 x 48 lattice at beta=6.2 using the Sheikholeslami-Wohlert action in the quenched approximation.

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First Lattice Study of Semileptonic Decays of Lambda_b and Xi_b Baryons

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