1/m{sub Q} corrections to form factors and extraction of {vert_bar}V{sub cb}{vert_bar}

Journal Article · Wed Oct 01 04:00:00 EDT 1997 · Physical Review, D

DOI:https://doi.org/10.1103/PhysRevD.56.4146· OSTI ID:560582

Liu, J ^[1]; Chao, K ^[2]

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1. Physics Department, Peking University, Beijing 100871 (China)
2. CCAST (World Laboratory), Beijing 100080 (China)

Form factors for 0{sup {minus}}{r_arrow}0{sup {minus}} and 0{sup {minus}}{r_arrow}1{sup {minus}} mesonic transitions in the heavy quark limit and the 1/m{sub Q} corrections are analyzed model independently within the Bethe-Salpeter (BS) formalism. The analysis shows that the BS formalism has spin-flavor symmetry in the heavy quark limit and respects Luke`s theorem when the 1/m{sub Q} corrections are taken into account. All form factors for B{r_arrow}D{sup (*)} transitions beyond the zero recoil point are estimated in a relativistic constituent quark model based on the BS formalism. Using these form factors we calculate the branching ratios for the semileptonic decays B{r_arrow}D{sup (*)}l{sup +}{nu}{sub l} and extract the Cabibbo-Kobayashi-Maskawa matrix element {vert_bar}V{sub cb}{vert_bar}. We get {vert_bar}V{sub cb}{vert_bar}=0.042{plus_minus}0.003 which is consistent with the current world average. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 560582
• Journal Information: Physical Review, D, Journal Name: Physical Review, D Journal Issue: 7 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
B MESONS
BETHE-SALPETER EQUATION
BRANCHING RATIO
CORRECTIONS
D*-2010 MESONS
FLAVOR
FORM FACTORS
KOBAYASHI-MASKAWA MATRIX
MATRIX ELEMENTS
QUARKS
SEMILEPTONIC DECAY
SPIN