Model-independent determinations of B̄ → Dlv̄, D*lv̄ form factors

C. Glenn Boyd; Benjamín Grinstein; Richard F. Lebed

doi:10.1016/0550-3213(95)00653-2

Model-independent determinations of B̄ → Dlv̄, D*lv̄ form factors

C. Glenn Boyd, Benjamín Grinstein, Richard F. Lebed

Research output: Contribution to journal › Article › peer-review

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Abstract

We present non-perturbative, model-independent parametrizations of the individual QCD form factors relevant to B̄ → D*lv̄ and B̄ → Dlv̄ decays. These results follow from dispersion relations and analyticity, without recourse to heavy quark symmetry. To describe a form factor with two percent accuracy, three parameters are necessary, one of which is its normalization at zero recoil, ℱ(1). We combine the individual form factors using heavy quark symmetry to extract values for the product |V_cb|ℱ(1) from B̄ → D*lv̄ data with negligible extrapolation uncertainty.

Original language	English (US)
Pages (from-to)	493-511
Number of pages	19
Journal	Nuclear Physics B
Volume	461
Issue number	3
DOIs	https://doi.org/10.1016/0550-3213(95)00653-2
State	Published - Feb 26 1996
Externally published	Yes

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/0550-3213(95)00653-2

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@article{a77ef60cc26c4e2abcf05643a9ec4502,

title = "Model-independent determinations of {\=B} → Dl{\=v}, D*l{\=v} form factors",

abstract = "We present non-perturbative, model-independent parametrizations of the individual QCD form factors relevant to {\=B} → D*l{\=v} and {\=B} → Dl{\=v} decays. These results follow from dispersion relations and analyticity, without recourse to heavy quark symmetry. To describe a form factor with two percent accuracy, three parameters are necessary, one of which is its normalization at zero recoil, ℱ(1). We combine the individual form factors using heavy quark symmetry to extract values for the product |Vcb|ℱ(1) from {\=B} → D*l{\=v} data with negligible extrapolation uncertainty.",

author = "Boyd, {C. Glenn} and Benjam{\'i}n Grinstein and Lebed, {Richard F.}",

note = "Funding Information: We would like to thank Hans Paar, Vivek Sharma, and Persis Drell for useful discussions of the CLEO and ALEPH experiments. We also appreciate useful comments concerning anomalous thresholds from John Bjorken. The research of one of us (B.G.) is funded in part by the Alfred P. Sloan Foundation. This work is supported in part by the Department of Energy under contract DOE-FG03-90ER40546.",

year = "1996",

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doi = "10.1016/0550-3213(95)00653-2",

language = "English (US)",

volume = "461",

pages = "493--511",

journal = "Nuclear Physics B",

issn = "0550-3213",

publisher = "Elsevier",

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T1 - Model-independent determinations of B̄ → Dlv̄, D*lv̄ form factors

AU - Boyd, C. Glenn

AU - Grinstein, Benjamín

AU - Lebed, Richard F.

N1 - Funding Information: We would like to thank Hans Paar, Vivek Sharma, and Persis Drell for useful discussions of the CLEO and ALEPH experiments. We also appreciate useful comments concerning anomalous thresholds from John Bjorken. The research of one of us (B.G.) is funded in part by the Alfred P. Sloan Foundation. This work is supported in part by the Department of Energy under contract DOE-FG03-90ER40546.

PY - 1996/2/26

Y1 - 1996/2/26

N2 - We present non-perturbative, model-independent parametrizations of the individual QCD form factors relevant to B̄ → D*lv̄ and B̄ → Dlv̄ decays. These results follow from dispersion relations and analyticity, without recourse to heavy quark symmetry. To describe a form factor with two percent accuracy, three parameters are necessary, one of which is its normalization at zero recoil, ℱ(1). We combine the individual form factors using heavy quark symmetry to extract values for the product |Vcb|ℱ(1) from B̄ → D*lv̄ data with negligible extrapolation uncertainty.

AB - We present non-perturbative, model-independent parametrizations of the individual QCD form factors relevant to B̄ → D*lv̄ and B̄ → Dlv̄ decays. These results follow from dispersion relations and analyticity, without recourse to heavy quark symmetry. To describe a form factor with two percent accuracy, three parameters are necessary, one of which is its normalization at zero recoil, ℱ(1). We combine the individual form factors using heavy quark symmetry to extract values for the product |Vcb|ℱ(1) from B̄ → D*lv̄ data with negligible extrapolation uncertainty.

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DO - 10.1016/0550-3213(95)00653-2

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AN - SCOPUS:0030602457

SN - 0550-3213

VL - 461

SP - 493

EP - 511

JO - Nuclear Physics B

JF - Nuclear Physics B

IS - 3

ER -

Model-independent determinations of B̄ → Dlv̄, D*lv̄ form factors

Abstract

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