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Title: Search for $$B_s \to \mu^+\mu^-$$ and $$B_d \to \mu^+\mu^-$$ Decays with CDF II

Abstract

A search has been performed for B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -} and B{sup 0} {yields} {mu}{sup +}{mu}{sup -} decays using 7 fb{sup -1} of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. The observed number of B{sup 0} candidates is consistent with background-only expectations and yields an upper limit on the branching fraction of {Beta}(B{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 6.0 x 10{sup -9} at 95% confidence level. We observe an excess of B{sub s}{sup 0} candidates. The probability that the background processes alone could produce such an excess or larger is 0.27%. The probability that the combination of background and the expected standard model rate of B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -} could produce such an excess or larger is 1.9%. These data are used to determine {Beta}(B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -}) = (1.8{sub -0.9}{sup +1.1}) x 10{sup -8} and provide an upper limit of {Beta}(B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 4.0 x 10{sup -8} at 95% confidence level.

Authors:
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Publication Date:
Research Org.:
Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1023524
Report Number(s):
FERMILAB-PUB-11-315-E-PPD
arXiv eprint number arXiv:1107.2304; TRN: US1104575
DOE Contract Number:  
AC02-07CH11359
Resource Type:
Journal Article
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; FERMILAB COLLIDER DETECTOR; FERMILAB TEVATRON; LUMINOSITY; PROBABILITY; STANDARD MODEL; Experiment-HEP

Citation Formats

Aaltonen, T., /Helsinki Inst. of Phys., Alvarez Gonzalez, B., /Oviedo U. /Cantabria Inst. of Phys., Amerio, S., /INFN, Padua, Amidei, D., /Michigan U., Anastassov, A., /Northwestern U., Annovi, A., /Frascati, Antos, J., /Comenius U., Apollinari, G., /Fermilab, Appel, J.A., /Fermilab, Apresyan, A., /Purdue U., Arisawa, T., and /Waseda U. /Dubna, JINR. Search for $B_s \to \mu^+\mu^-$ and $B_d \to \mu^+\mu^-$ Decays with CDF II. United States: N. p., 2011. Web.
Aaltonen, T., /Helsinki Inst. of Phys., Alvarez Gonzalez, B., /Oviedo U. /Cantabria Inst. of Phys., Amerio, S., /INFN, Padua, Amidei, D., /Michigan U., Anastassov, A., /Northwestern U., Annovi, A., /Frascati, Antos, J., /Comenius U., Apollinari, G., /Fermilab, Appel, J.A., /Fermilab, Apresyan, A., /Purdue U., Arisawa, T., & /Waseda U. /Dubna, JINR. Search for $B_s \to \mu^+\mu^-$ and $B_d \to \mu^+\mu^-$ Decays with CDF II. United States.
Aaltonen, T., /Helsinki Inst. of Phys., Alvarez Gonzalez, B., /Oviedo U. /Cantabria Inst. of Phys., Amerio, S., /INFN, Padua, Amidei, D., /Michigan U., Anastassov, A., /Northwestern U., Annovi, A., /Frascati, Antos, J., /Comenius U., Apollinari, G., /Fermilab, Appel, J.A., /Fermilab, Apresyan, A., /Purdue U., Arisawa, T., and /Waseda U. /Dubna, JINR. Fri . "Search for $B_s \to \mu^+\mu^-$ and $B_d \to \mu^+\mu^-$ Decays with CDF II". United States. https://www.osti.gov/servlets/purl/1023524.
@article{osti_1023524,
title = {Search for $B_s \to \mu^+\mu^-$ and $B_d \to \mu^+\mu^-$ Decays with CDF II},
author = {Aaltonen, T. and /Helsinki Inst. of Phys. and Alvarez Gonzalez, B. and /Oviedo U. /Cantabria Inst. of Phys. and Amerio, S. and /INFN, Padua and Amidei, D. and /Michigan U. and Anastassov, A. and /Northwestern U. and Annovi, A. and /Frascati and Antos, J. and /Comenius U. and Apollinari, G. and /Fermilab and Appel, J.A. and /Fermilab and Apresyan, A. and /Purdue U. and Arisawa, T. and /Waseda U. /Dubna, JINR},
abstractNote = {A search has been performed for B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -} and B{sup 0} {yields} {mu}{sup +}{mu}{sup -} decays using 7 fb{sup -1} of integrated luminosity collected by the CDF II detector at the Fermilab Tevatron collider. The observed number of B{sup 0} candidates is consistent with background-only expectations and yields an upper limit on the branching fraction of {Beta}(B{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 6.0 x 10{sup -9} at 95% confidence level. We observe an excess of B{sub s}{sup 0} candidates. The probability that the background processes alone could produce such an excess or larger is 0.27%. The probability that the combination of background and the expected standard model rate of B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -} could produce such an excess or larger is 1.9%. These data are used to determine {Beta}(B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -}) = (1.8{sub -0.9}{sup +1.1}) x 10{sup -8} and provide an upper limit of {Beta}(B{sub s}{sup 0} {yields} {mu}{sup +}{mu}{sup -}) < 4.0 x 10{sup -8} at 95% confidence level.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {7}
}