@Article{BABARCollaborationdelAmoSanchez_etal2011,
author="BABAR Collaboration (del Amo Sanchez, P. et al
and Lopez-March, N.
and Martinez-Vidal, F.
and Oyanguren, A.",
title="Measurement of the B-0 -> pi(-)l(+)nu and B+ -> eta(l)l(+)nu branching fractions, the B-0 -> pi(-)l(+)nu and B+ -> eta l(+)nu form- factor shapes, and determination of |Vub|",
journal="Physical Review D",
year="2011",
publisher="Amer Physical Soc",
volume="83",
number="5",
pages="052011--16pp",
abstract="We report the results of a study of the exclusive charmless semileptonic decays, B+ -> eta(l)l(+)nu and B-0 -> pi(-)l(+)nu undertaken with approximately 464 x 10(6) B (B) over bar pairs collected at the Y(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with a loose neutrino reconstruction technique. We obtain partial branching fractions for B+ -> eta l(+)nu and B-0 -> pi(-)l(+)nu decays in three and 12 bins of q(2), respectively, from which we extract the f (+)(q(2)) form-factor shapes and the total branching fractions B(B+ -> eta l(+)nu)= (0.36 +/- 0.05(stat) +/- 0.04(syst)) x 10(-4) and B(B-0 -> pi(-)l(+)nu) = (1.42 +/- 0.05(stat) +/- 0.07(syst)) x 10(-4). We also measure B(B+ -> eta{\textquoteright}l(+)nu) = (0.24 +/- 0.08(stat) +/- 0.03(syst)) x 10(-4). We obtain values for the magnitude of the CKM matrix element |V-ub| using three different QCD calculations.",
optnote="ISI:000288787100002",
optnote="exported from refbase (https://references.ific.uv.es/refbase/show.php?record=537), last updated on Mon, 11 Apr 2011 17:06:13 +0000",
issn="1550-7998",
doi="10.1103/PhysRevD.83.052011",
opturl="http://arxiv.org/abs/arXiv:1010.0987",
opturl="https://doi.org/10.1103/PhysRevD.83.052011",
archivePrefix="arXiv",
eprint="arXiv:1010.0987",
language="English"
}