Measurement of the Cabibbo-Kobayashi-Maskawa matrix element │Vub│ with B → ρeν decays

B Aubert; Theresa Harrison; Kelly Ford; Christopher Hawkes; David Knowles; Sian Morgan; Richard Penny; Alan Watson; Nigel Watson

doi:10.1103/PhysRevLett.90.181801

Measurement of the Cabibbo-Kobayashi-Maskawa matrix element │Vub│ with B → ρeν decays

B Aubert, Theresa Harrison, Kelly Ford, Christopher Hawkes, David Knowles, Sian Morgan, Richard Penny, Alan Watson, Nigel Watson

Physics and Astronomy

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28 Citations (Scopus)

Abstract

We present a measurement of the branching fraction for the rare decays B-->rhoenu and extract a value for the magnitude of V(ub), one of the smallest elements of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are given for five different calculations of form factors used to para-metrize the hadronic current in semileptonic decays. Using a sample of 55 x 10(6) BB meson pairs recorded with the BABAR detector at the PEP-II e(+)e(-) storage ring, we obtain B(B0-->rho(-)e(+)nu)=(3.29+/-0.42+/-0.47+/-0.55) x 10(-4) and |V(ub)|=(3.64+/-0.22+/-0.25(+0.39)(-0.56)) x 10(-3), where the uncertainties are statistical, systematic, and theoretical, respectively.

Original language	English
Pages (from-to)	181801
Number of pages	1
Journal	Physical Review Letters
Volume	90
Issue number	18
Early online date	1 May 2003
DOIs	https://doi.org/10.1103/PhysRevLett.90.181801
Publication status	Published - 1 May 2003

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title = "Measurement of the Cabibbo-Kobayashi-Maskawa matrix element │Vub│ with B → ρeν decays",

abstract = "We present a measurement of the branching fraction for the rare decays B-->rhoenu and extract a value for the magnitude of V(ub), one of the smallest elements of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are given for five different calculations of form factors used to para-metrize the hadronic current in semileptonic decays. Using a sample of 55 x 10(6) BB meson pairs recorded with the BABAR detector at the PEP-II e(+)e(-) storage ring, we obtain B(B0-->rho(-)e(+)nu)=(3.29+/-0.42+/-0.47+/-0.55) x 10(-4) and |V(ub)|=(3.64+/-0.22+/-0.25(+0.39)(-0.56)) x 10(-3), where the uncertainties are statistical, systematic, and theoretical, respectively.",

author = "B Aubert and Theresa Harrison and Kelly Ford and Christopher Hawkes and David Knowles and Sian Morgan and Richard Penny and Alan Watson and Nigel Watson",

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T1 - Measurement of the Cabibbo-Kobayashi-Maskawa matrix element │Vub│ with B → ρeν decays

AU - Aubert, B

AU - Harrison, Theresa

AU - Ford, Kelly

AU - Hawkes, Christopher

AU - Knowles, David

AU - Morgan, Sian

AU - Penny, Richard

AU - Watson, Alan

AU - Watson, Nigel

PY - 2003/5/1

Y1 - 2003/5/1

N2 - We present a measurement of the branching fraction for the rare decays B-->rhoenu and extract a value for the magnitude of V(ub), one of the smallest elements of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are given for five different calculations of form factors used to para-metrize the hadronic current in semileptonic decays. Using a sample of 55 x 10(6) BB meson pairs recorded with the BABAR detector at the PEP-II e(+)e(-) storage ring, we obtain B(B0-->rho(-)e(+)nu)=(3.29+/-0.42+/-0.47+/-0.55) x 10(-4) and |V(ub)|=(3.64+/-0.22+/-0.25(+0.39)(-0.56)) x 10(-3), where the uncertainties are statistical, systematic, and theoretical, respectively.

AB - We present a measurement of the branching fraction for the rare decays B-->rhoenu and extract a value for the magnitude of V(ub), one of the smallest elements of the Cabibbo-Kobayashi-Maskawa quark-mixing matrix. The results are given for five different calculations of form factors used to para-metrize the hadronic current in semileptonic decays. Using a sample of 55 x 10(6) BB meson pairs recorded with the BABAR detector at the PEP-II e(+)e(-) storage ring, we obtain B(B0-->rho(-)e(+)nu)=(3.29+/-0.42+/-0.47+/-0.55) x 10(-4) and |V(ub)|=(3.64+/-0.22+/-0.25(+0.39)(-0.56)) x 10(-3), where the uncertainties are statistical, systematic, and theoretical, respectively.

U2 - 10.1103/PhysRevLett.90.181801

DO - 10.1103/PhysRevLett.90.181801

M3 - Article

C2 - 12785997

SN - 1079-7114

VL - 90

SP - 181801

JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

ER -

Measurement of the Cabibbo-Kobayashi-Maskawa matrix element │Vub│ with B → ρeν decays

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