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Title: Studies of tau- to h- h- h+ nu and tau- to K- pi0 nu Decays at BaBar

Abstract

We present preliminary inclusive branching fraction measurements of {tau}{sup -} {yields} h{sup -}h{sup -}h{sup +}{nu} (h = {pi} or K) and {tau}{sup -} K{sup -}{pi}{sup 0}{nu} decay modes using a sample of {tau}-pair events collected by the BABAR detector at the SLAC PEP-II asymmetric e{sup +}e{sup -} storage ring. The branching fractions of {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}, {tau}{sup -} {yields} K{sup -}{pi}{sup -}{pi}{sup +}{nu}, and {tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu} are measured with higher precision than previously published results and the inclusive branching fraction {tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu} is measured for the first time. In addition, the first measurement of the branching fraction {tau}{sup -} {yields} {pi}{sup -}{phi}{nu} and the measurement of the branching fraction {tau}{sup -} {yields} K{sup -}{phi}{nu} are determined by means of a binned maximum likelihood fit to the K{sup +}K{sup -} invariant mass distribution. These branching fractions are extracted by means of a migration matrix that accounts for the cross contamination between the {tau}{sup -} {yields} h{sup -}h{sup -}h{sup +}{nu} modes. The preliminary {tau}{sup -} {yields} K{sup -}{pi}{sup 0}{nu} branching fraction and invariant mass distributions are also presented in this paper.

Authors:
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
918526
Report Number(s):
SLAC-PUB-12920
TRN: US0805392
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Conference
Journal Name:
Nucl.Phys.Proc.Suppl.169:98-104,2007
Additional Journal Information:
Conference: Prepared for 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; ACCURACY; CONTAMINATION; DECAY; MASS DISTRIBUTION; MAXIMUM-LIKELIHOOD FIT; PHYSICS; STANFORD LINEAR ACCELERATOR CENTER; STORAGE RINGS; TAU PARTICLES; LEPTONS; Experiment-HEP,HEPEX

Citation Formats

Nugent, I M, and /Victoria U. Studies of tau- to h- h- h+ nu and tau- to K- pi0 nu Decays at BaBar. United States: N. p., 2007. Web.
Nugent, I M, & /Victoria U. Studies of tau- to h- h- h+ nu and tau- to K- pi0 nu Decays at BaBar. United States.
Nugent, I M, and /Victoria U. 2007. "Studies of tau- to h- h- h+ nu and tau- to K- pi0 nu Decays at BaBar". United States. https://www.osti.gov/servlets/purl/918526.
@article{osti_918526,
title = {Studies of tau- to h- h- h+ nu and tau- to K- pi0 nu Decays at BaBar},
author = {Nugent, I M and /Victoria U.},
abstractNote = {We present preliminary inclusive branching fraction measurements of {tau}{sup -} {yields} h{sup -}h{sup -}h{sup +}{nu} (h = {pi} or K) and {tau}{sup -} K{sup -}{pi}{sup 0}{nu} decay modes using a sample of {tau}-pair events collected by the BABAR detector at the SLAC PEP-II asymmetric e{sup +}e{sup -} storage ring. The branching fractions of {tau}{sup -} {yields} {pi}{sup -}{pi}{sup -}{pi}{sup +}, {tau}{sup -} {yields} K{sup -}{pi}{sup -}{pi}{sup +}{nu}, and {tau}{sup -} {yields} K{sup -}{pi}{sup -}K{sup +}{nu} are measured with higher precision than previously published results and the inclusive branching fraction {tau}{sup -} {yields} K{sup -}K{sup -}K{sup +}{nu} is measured for the first time. In addition, the first measurement of the branching fraction {tau}{sup -} {yields} {pi}{sup -}{phi}{nu} and the measurement of the branching fraction {tau}{sup -} {yields} K{sup -}{phi}{nu} are determined by means of a binned maximum likelihood fit to the K{sup +}K{sup -} invariant mass distribution. These branching fractions are extracted by means of a migration matrix that accounts for the cross contamination between the {tau}{sup -} {yields} h{sup -}h{sup -}h{sup +}{nu} modes. The preliminary {tau}{sup -} {yields} K{sup -}{pi}{sup 0}{nu} branching fraction and invariant mass distributions are also presented in this paper.},
doi = {},
url = {https://www.osti.gov/biblio/918526}, journal = {Nucl.Phys.Proc.Suppl.169:98-104,2007},
number = ,
volume = ,
place = {United States},
year = {Wed Oct 24 00:00:00 EDT 2007},
month = {Wed Oct 24 00:00:00 EDT 2007}
}

Conference:
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