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Title: Lepton Universality Test in Upsilon(1S) Decays at BaBar

Abstract

Using a sample of 122 million {Upsilon}(3S) decays collected with the BABAR detector at the PEP-II asymmetric energy collider at the SLAC National Accelerator Laboratory, we measure the ratio R{sub {tau}{mu}} = BR({Upsilon}(1S) {yields} {tau}{sup +}{tau}{sup -})/BR({Upsilon}(1S) {yields} {mu}{sup +}{mu}{sup -}); the measurement is intended as a test of lepton universality and as a possible search for a light pseudoscalar Higgs boson in Next to Minimal Supersymmetric Standard Model (NMSSM) scenarios. Such a boson could appear in a deviation of the ratio R{sub {tau}{mu}} from the Standard Model expectation, that is 1, except for small lepton mass corrections. The analysis exploits the decays {Upsilon}(3S) {yields} {Upsilon}(1S){pi}{sup +}{pi}{sup -}, {Upsilon}(1S) {yields} l{sup +}l{sup -}, where l = {mu},{tau}.

Authors:
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1038433
Report Number(s):
SLAC-PUB-14946
arXiv:0910.0423; TRN: US1201866
DOE Contract Number:  
AC02-76SF00515
Resource Type:
Conference
Resource Relation:
Conference: To appear in the proceedings of Meeting of the Division of Particles and Fields of the American Physical Society (DPF 2009), Detroit, Michigan, 26-31 Jul 2009
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BOSONS; FERMILAB ACCELERATOR; HIGGS BOSONS; LEPTONS; PHYSICS; PSEUDOSCALARS; STANDARD MODEL; STANFORD LINEAR ACCELERATOR CENTER; DECAY; PARTICLES; Experiment-HEP,HEPEX

Citation Formats

Guido, Elisa, and /Genoa U. /INFN, Genoa. Lepton Universality Test in Upsilon(1S) Decays at BaBar. United States: N. p., 2012. Web.
Guido, Elisa, & /Genoa U. /INFN, Genoa. Lepton Universality Test in Upsilon(1S) Decays at BaBar. United States.
Guido, Elisa, and /Genoa U. /INFN, Genoa. 2012. "Lepton Universality Test in Upsilon(1S) Decays at BaBar". United States. https://www.osti.gov/servlets/purl/1038433.
@article{osti_1038433,
title = {Lepton Universality Test in Upsilon(1S) Decays at BaBar},
author = {Guido, Elisa and /Genoa U. /INFN, Genoa},
abstractNote = {Using a sample of 122 million {Upsilon}(3S) decays collected with the BABAR detector at the PEP-II asymmetric energy collider at the SLAC National Accelerator Laboratory, we measure the ratio R{sub {tau}{mu}} = BR({Upsilon}(1S) {yields} {tau}{sup +}{tau}{sup -})/BR({Upsilon}(1S) {yields} {mu}{sup +}{mu}{sup -}); the measurement is intended as a test of lepton universality and as a possible search for a light pseudoscalar Higgs boson in Next to Minimal Supersymmetric Standard Model (NMSSM) scenarios. Such a boson could appear in a deviation of the ratio R{sub {tau}{mu}} from the Standard Model expectation, that is 1, except for small lepton mass corrections. The analysis exploits the decays {Upsilon}(3S) {yields} {Upsilon}(1S){pi}{sup +}{pi}{sup -}, {Upsilon}(1S) {yields} l{sup +}l{sup -}, where l = {mu},{tau}.},
doi = {},
url = {https://www.osti.gov/biblio/1038433}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Apr 10 00:00:00 EDT 2012},
month = {Tue Apr 10 00:00:00 EDT 2012}
}

Conference:
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