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Title: The Search for B+ to Tau+ Nu(Tau) at BaBar

Abstract

We present a search for the decay B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} using 288 fb{sup -1} of data collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed semileptonic B decay (B{sup -} {yields} D{sup o}{ell}{sup -}{bar {nu}}{sub {ell}}X) is selected, and in the recoil a search for B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} signal is performed. The {tau} is identified in the following channels: {tau}{sup +} {yields} e{sup +}{nu}{sub e}{bar {nu}}{sub {tau}}, {tau}{sup +} {yields} {mu}{sup +} {nu}{sub {mu}}{bar {nu}}{sub {tau}}, {tau}{sup +} {yields} {pi}{sup +}{pi}{sup 0}{bar {nu}}{sub {tau}}. We measure a branching fraction of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) = 0.88{sub -0.67}{sup +0.68}(stat.) {+-} 0.11(syst.) x 10{sup -4} and extract an upper limit on the branching fraction, at the 90% confidence level, of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) < 1.8 x 10{sup -4}. We calculate the product of the B meson decay constant and |V{sub ub}| to be f{sub B} {center_dot} |V{sub ub}| = (7.0{sub -3.6}{sup +2.3}(stat.){sub -0.5}{sup +0.4}(syst.)) x 10{sup -4} GeV.

Authors:
;
Publication Date:
Research Org.:
Stanford Linear Accelerator Center (SLAC)
Sponsoring Org.:
USDOE
OSTI Identifier:
897467
Report Number(s):
SLAC-PUB-12283
hep-ex/0611019; TRN: US0701429
DOE Contract Number:
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: To appear in the proceedings of 9th International Workshop on Tau Lepton Physics (Tau06), Pisa, Italy, 19-22 Sep 2006
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; B MESONS; DECAY; PHYSICS; RESONANCE; STANFORD LINEAR ACCELERATOR CENTER; TAU PARTICLES; Experiment-HEP,HEPEX

Citation Formats

Corwin, L.A., and /SLAC. The Search for B+ to Tau+ Nu(Tau) at BaBar. United States: N. p., 2007. Web.
Corwin, L.A., & /SLAC. The Search for B+ to Tau+ Nu(Tau) at BaBar. United States.
Corwin, L.A., and /SLAC. Mon . "The Search for B+ to Tau+ Nu(Tau) at BaBar". United States. doi:. https://www.osti.gov/servlets/purl/897467.
@article{osti_897467,
title = {The Search for B+ to Tau+ Nu(Tau) at BaBar},
author = {Corwin, L.A. and /SLAC},
abstractNote = {We present a search for the decay B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} using 288 fb{sup -1} of data collected at the {Upsilon}(4S) resonance with the BABAR detector at the SLAC PEP-II B-Factory. A sample of events with one reconstructed semileptonic B decay (B{sup -} {yields} D{sup o}{ell}{sup -}{bar {nu}}{sub {ell}}X) is selected, and in the recoil a search for B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}} signal is performed. The {tau} is identified in the following channels: {tau}{sup +} {yields} e{sup +}{nu}{sub e}{bar {nu}}{sub {tau}}, {tau}{sup +} {yields} {mu}{sup +} {nu}{sub {mu}}{bar {nu}}{sub {tau}}, {tau}{sup +} {yields} {pi}{sup +}{pi}{sup 0}{bar {nu}}{sub {tau}}. We measure a branching fraction of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) = 0.88{sub -0.67}{sup +0.68}(stat.) {+-} 0.11(syst.) x 10{sup -4} and extract an upper limit on the branching fraction, at the 90% confidence level, of {Beta}(B{sup +} {yields} {tau}{sup +}{nu}{sub {tau}}) < 1.8 x 10{sup -4}. We calculate the product of the B meson decay constant and |V{sub ub}| to be f{sub B} {center_dot} |V{sub ub}| = (7.0{sub -3.6}{sup +2.3}(stat.){sub -0.5}{sup +0.4}(syst.)) x 10{sup -4} GeV.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon Jan 08 00:00:00 EST 2007},
month = {Mon Jan 08 00:00:00 EST 2007}
}

Conference:
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