Measurement of the B0 to pi l nu Form Factor Shape and Branching Fraction, and Determination of |Vub| with a Loose Neutrino Reconstruction Technique
Conference
·
OSTI ID:892630
The authors report the results of a study of the exclusive charmless semileptonic B{sup 0} {yields} {pi}{sup -}{ell}{sup +}{nu} decay undertaken with approximately 227 million B{bar B} pairs collected at the {Upsilon}(4S) resonance with the BABAR detector. The analysis uses events in which the signal B mesons are reconstructed with a novel loose neutrino reconstruction technique. We obtain partial branching fractions in 12 bins of q{sup 2}, the {ell}{sup +}{nu} invariant mass squared, from which we extract the f{sup +}(q{sup 2}) form factor shape and the total branching fraction: {Beta}(B{sup 0} {yields} {pi}{sup -}{ell}{sup +}{nu}) = 1.44 {+-} 0.08{sub stat} {+-} 0.10{sub syst} x 10{sup -4}. Based on a recent theoretical calculation of the form factor, we find the magnitude of the CKM matrix element |V{sub ub}| to be (4.1 {+-} 0.2{sub stat} {+-} 0.2{sub syst{sub -0.4}{sup +0.6}}FF) x 10{sup -3}, where the last uncertainty is due to the normalization of the form factor.
- Research Organization:
- Stanford Linear Accelerator Center (SLAC)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC02-76SF00515
- OSTI ID:
- 892630
- Report Number(s):
- SLAC-PUB-12005; hep-ex/0607060
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement of the B0 to \pi l^+ \nu Form-Factor Shape and Branching Fraction, and Determination of |V_{ub}| with a Loose Neutrino Reconstruction Technique
Branching Fraction for B0 -> pi- l+ nu and Determination of |Vub| in Upsilon(4S) -> B0 B0bar Events Tagged by B0bar -> D(*)+ l- nubar
Measurement of the B0 ->π−ℓνand B ->η(′)ℓνBranching Fractions, the B0 ->π−ℓνand B ->ηℓνForm-Factor Shapes, and Determination of |Vub|
Journal Article
·
Mon Dec 11 23:00:00 EST 2006
· Phys.Rev.Lett.98:091801,2007
·
OSTI ID:907960
Branching Fraction for B0 -> pi- l+ nu and Determination of |Vub| in Upsilon(4S) -> B0 B0bar Events Tagged by B0bar -> D(*)+ l- nubar
Conference
·
Wed Jun 29 00:00:00 EDT 2005
·
OSTI ID:881141
Measurement of the B0 ->π−ℓνand B ->η(′)ℓνBranching Fractions, the B0 ->π−ℓνand B ->ηℓνForm-Factor Shapes, and Determination of |Vub|
Journal Article
·
Fri Aug 12 00:00:00 EDT 2011
· Phys.Rev.D83:052011,2011
·
OSTI ID:1022579