Calculation of the semileptonic decay width of the {Lambda}{sub b} baryon

Journal Article · Mon Dec 01 00:00:00 EST 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.7267· OSTI ID:553187

Jin, C ^[1]

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1. Institut fuer Theoretische Teilchenphysik, Universitaet Karlsruhe, D-76128 Karlsruhe (Germany)

We extend the approach based on light-cone expansion and heavy quark effective theory to inclusive semileptonic decay of an unpolarized b-flavored hadron. It is applied to calculate the semileptonic decay width of the {Lambda}{sub b} baryon and its ratio to that of the B meson. We obtain {Gamma}{sub SL}({Lambda}{sub b})=(51{plus_minus}9){vert_bar}V{sub cb}{vert_bar}{sup 2} ps{sup {minus}1} and {Gamma}{sub SL}({Lambda}{sub b})/{Gamma}{sub SL}(B)=1.052{plus_minus}0.006. From the latter, the semileptonic branching fraction for {Lambda}{sub b} is predicted to be (8.7{plus_minus}0.7){percent}. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 553187
• Journal Information: Physical Review, D, Vol. 56, Issue 11; Other Information: PBD: Dec 1997
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
LAMBDA B NEUTRAL BARYONS
SEMILEPTONIC DECAY
LAMBDA BARYONS
LIGHT CONE
QUARKS
B MESONS
BRANCHING RATIO