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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/23989
Title: 
Measurement of the charge asymmetry in semileptonic B-s(0) decays
Author(s): 
Institution: 
  • Univ Buenos Aires
  • LAFEX
  • Universidade do Estado do Rio de Janeiro (UERJ)
  • Universidade Estadual Paulista (UNESP)
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  • Lawrence Berkeley Natl Lab
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  • Fermilab Natl Accelerator Lab
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ISSN: 
0031-9007
Abstract: 
We have performed the first direct measurement of the time-integrated flavor untagged charge asymmetry in semileptonic B-s(0) decays A(SL)(s,unt) by comparing the decay rate of B-s(0) -> mu(+) D-s(-) nu X, where D-s(-) -> phi pi(-) and phi -> K+K-, with the charge-conjugate (B) over bar (0)(s) decay rate. This sample was selected from 1: 3 fb(-1) of data collected by the D0 experiment in run II of the Fermilab Tevatron collider. We obtain A(SL)(s,unt) = [1.23 +/- 0.97(stat) +/- 0.17(syst)] x 10(-2). Assuming that Delta m(s)/(Gamma) over bar (s) >> 1, this result can be translated into a measurement of the CP-violating phase in B-s(0) mixing: Delta Gamma(s)/Delta m(s) tan phi(s) = [2.45 +/- 1.93(stat) +/- 0.35(syst)] x 10(-2).
Issue Date: 
13-Apr-2007
Citation: 
Physical Review Letters. College Pk: American Physical Soc, v. 98, n. 15, 7 p., 2007.
Time Duration: 
7
Publisher: 
American Physical Soc
Source: 
http://dx.doi.org/10.1103/PhysRevLett.98.151801
URI: 
http://hdl.handle.net/11449/23989
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/23989
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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