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Title: Measurement of the B0 -> pilnu form-factor shape and branching fraction, and determination of |Vub| with a loose neutrino reconstruction technique; Mesure du rapport d'embranchement et du facteur deforme de la desintegration B0 to pilnu, et determination de |Vub| avec unetechnique de reconstruction relachee du neutrino (in French)

Abstract

The authors report the results of a study of the exclusive charmless semileptonic decay, B 0 → π -+v, undertaken with approximately 227 million B$$\bar{B}$$ pairs collected at the Y(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with an innovative loose neutrino reconstruction technique. They obtain partial branching fractions in 12 bins of q 2, the momentum transfer squared, from which they extract the f +(q 2) form-factor shape and the total branching fraction β(B 0 → π -+v) = (1.46 ± 0.07 stat ± 0.08 syst) x 10 -4. Based on a recent unquenched lattice QCD calculation of the form factor in the range q 2 > 16 GeV 2/c 4, they find the magnitude of the CKM matrix element |V ub| to be (4.1 ± 0.2 stat ± 0.2 syst$$+0.6\atop{-0.4}$$FF}) x 10 -3, where the last uncertainty is due to the normalization of the form factor.

Authors:
 [1]
  1. Univ. of Montreal, Quebec (Canada)
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
922603
Report Number(s):
SLAC-R-867
TRN: US0801162
DOE Contract Number:
AC02-76SF00515
Resource Type:
Thesis/Dissertation
Country of Publication:
United States
Language:
French
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FORM FACTORS; MATRIX ELEMENTS; MOMENTUM TRANSFER; NEUTRINOS; QUANTUM CHROMODYNAMICS; RESONANCE; SEMILEPTONIC DECAY; SHAPE; electroweak; chromodynamics; quark; meson; semileptonic; CKM; Vub; BaBar; CP; antimatter

Citation Formats

Cote, David. Measurement of the B0 -> pilnu form-factor shape and branching fraction, and determination of |Vub| with a loose neutrino reconstruction technique; Mesure du rapport d'embranchement et du facteur deforme de la desintegration B0 to pilnu, et determination de |Vub| avec unetechnique de reconstruction relachee du neutrino. United States: N. p., 2007. Web. doi:10.2172/922603.
Cote, David. Measurement of the B0 -> pilnu form-factor shape and branching fraction, and determination of |Vub| with a loose neutrino reconstruction technique; Mesure du rapport d'embranchement et du facteur deforme de la desintegration B0 to pilnu, et determination de |Vub| avec unetechnique de reconstruction relachee du neutrino. United States. doi:10.2172/922603.
Cote, David. Sun . "Measurement of the B0 -> pilnu form-factor shape and branching fraction, and determination of |Vub| with a loose neutrino reconstruction technique; Mesure du rapport d'embranchement et du facteur deforme de la desintegration B0 to pilnu, et determination de |Vub| avec unetechnique de reconstruction relachee du neutrino". United States. doi:10.2172/922603. https://www.osti.gov/servlets/purl/922603.
@article{osti_922603,
title = {Measurement of the B0 -> pilnu form-factor shape and branching fraction, and determination of |Vub| with a loose neutrino reconstruction technique; Mesure du rapport d'embranchement et du facteur deforme de la desintegration B0 to pilnu, et determination de |Vub| avec unetechnique de reconstruction relachee du neutrino},
author = {Cote, David},
abstractNote = {The authors report the results of a study of the exclusive charmless semileptonic decay, B0 → π-ℓ+v, undertaken with approximately 227 million B$\bar{B}$ pairs collected at the Y(4S) resonance with the BABAR detector. The analysis uses events in which the signal B decays are reconstructed with an innovative loose neutrino reconstruction technique. They obtain partial branching fractions in 12 bins of q2, the momentum transfer squared, from which they extract the f +(q2) form-factor shape and the total branching fraction β(B0 → π-ℓ+v) = (1.46 ± 0.07stat ± 0.08syst) x 10-4. Based on a recent unquenched lattice QCD calculation of the form factor in the range q2 > 16 GeV2/c4, they find the magnitude of the CKM matrix element |Vub| to be (4.1 ± 0.2stat ± 0.2syst$+0.6\atop{-0.4}$FF}) x 10-3, where the last uncertainty is due to the normalization of the form factor.},
doi = {10.2172/922603},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Sun Apr 01 00:00:00 EDT 2007},
month = {Sun Apr 01 00:00:00 EDT 2007}
}

Thesis/Dissertation:
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