Measurement of the B -> pi l nu Branching Fraction and Determination of |Vub| with Tagged B Mesons

B Aubert; Pablo Del Amo Sanchez; Matthew Barrett; Kelly Ford; Theresa Harrison; Alistair Hart; Christopher Hawkes; Sian Morgan; Alan Watson

doi:10.1103/PhysRevLett.97.211801

Measurement of the B -> pi l nu Branching Fraction and Determination of |Vub| with Tagged B Mesons

B Aubert, Pablo Del Amo Sanchez, Matthew Barrett, Kelly Ford, Theresa Harrison, Alistair Hart, Christopher Hawkes, Sian Morgan, Alan Watson

Physics and Astronomy

Research output: Contribution to journal › Article

71 Citations (Scopus)

Abstract

We report a measurement of the B-->pi l nu branching fraction based on 211 fb(-1) of data collected with the BABAR detector. We use samples of B0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay and combine the results assuming isospin symmetry to obtain B(B(0)-->pi- l+ nu) = (1.33+/-0.17stat+/-0.11syst) x 10(-4). We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element absolute value V(ub) by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find absolute value V(ub) = (4.5+/-0.5stat+/-0.3syst(+0.7) -0.5FF x 10(-3), where the last error is due to the normalization of the form factor.

Original language	English
Pages (from-to)	211801
Number of pages	1
Journal	Physical Review Letters
Volume	97
DOIs	https://doi.org/10.1103/PhysRevLett.97.211801
Publication status	Published - 1 Nov 2006

Access to Document

10.1103/PhysRevLett.97.211801

Cite this

@article{d53f369cb6294205b7e8ec611d35bc03,

title = "Measurement of the B -> pi l nu Branching Fraction and Determination of |Vub| with Tagged B Mesons",

abstract = "We report a measurement of the B-->pi l nu branching fraction based on 211 fb(-1) of data collected with the BABAR detector. We use samples of B0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay and combine the results assuming isospin symmetry to obtain B(B(0)-->pi- l+ nu) = (1.33+/-0.17stat+/-0.11syst) x 10(-4). We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element absolute value V(ub) by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find absolute value V(ub) = (4.5+/-0.5stat+/-0.3syst(+0.7) -0.5FF x 10(-3), where the last error is due to the normalization of the form factor.",

author = "B Aubert and {Del Amo Sanchez}, Pablo and Matthew Barrett and Kelly Ford and Theresa Harrison and Alistair Hart and Christopher Hawkes and Sian Morgan and Alan Watson",

year = "2006",

month = nov,

day = "1",

doi = "10.1103/PhysRevLett.97.211801",

language = "English",

volume = "97",

pages = "211801",

journal = "Physical Review Letters",

issn = "1079-7114",

publisher = "American Physical Society (APS)",

}

TY - JOUR

T1 - Measurement of the B -> pi l nu Branching Fraction and Determination of |Vub| with Tagged B Mesons

AU - Aubert, B

AU - Del Amo Sanchez, Pablo

AU - Barrett, Matthew

AU - Ford, Kelly

AU - Harrison, Theresa

AU - Hart, Alistair

AU - Hawkes, Christopher

AU - Morgan, Sian

AU - Watson, Alan

PY - 2006/11/1

Y1 - 2006/11/1

N2 - We report a measurement of the B-->pi l nu branching fraction based on 211 fb(-1) of data collected with the BABAR detector. We use samples of B0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay and combine the results assuming isospin symmetry to obtain B(B(0)-->pi- l+ nu) = (1.33+/-0.17stat+/-0.11syst) x 10(-4). We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element absolute value V(ub) by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find absolute value V(ub) = (4.5+/-0.5stat+/-0.3syst(+0.7) -0.5FF x 10(-3), where the last error is due to the normalization of the form factor.

AB - We report a measurement of the B-->pi l nu branching fraction based on 211 fb(-1) of data collected with the BABAR detector. We use samples of B0 and B+ mesons tagged by a second B meson reconstructed in a semileptonic or hadronic decay and combine the results assuming isospin symmetry to obtain B(B(0)-->pi- l+ nu) = (1.33+/-0.17stat+/-0.11syst) x 10(-4). We determine the magnitude of the Cabibbo-Kobayashi-Maskawa matrix element absolute value V(ub) by combining the partial branching fractions measured in ranges of the momentum transfer squared and theoretical calculations of the form factor. Using a recent lattice QCD calculation, we find absolute value V(ub) = (4.5+/-0.5stat+/-0.3syst(+0.7) -0.5FF x 10(-3), where the last error is due to the normalization of the form factor.

U2 - 10.1103/PhysRevLett.97.211801

DO - 10.1103/PhysRevLett.97.211801

M3 - Article

C2 - 17155736

SN - 1079-7114

VL - 97

SP - 211801

JO - Physical Review Letters

JF - Physical Review Letters

ER -

Measurement of the B -> pi l nu Branching Fraction and Determination of |Vub| with Tagged B Mesons

Abstract

Access to Document

Fingerprint

Cite this