TY  - JOUR
AU  - BABAR Collaboration (del Amo Sanchez, P. et al
AU  - Lopez-March, N.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
PY  - 2011
DA  - 2011//
TI  - 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|
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 052011
EP  - 16pp
VL  - 83
IS  - 5
PB  - Amer Physical Soc
AB  - 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'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.
SN  - 1550-7998
UR  - http://arxiv.org/abs/arXiv:1010.0987
UR  - https://doi.org/10.1103/PhysRevD.83.052011
DO  - 10.1103/PhysRevD.83.052011
LA  - English
N1  - ISI:000288787100002
ID  - BABARCollaborationdelAmoSanchez_etal2011
ER  -