Measurement of the charge asymmetry in semileptonic B-s(0) decays
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
13/04/2007
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Resumo |
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). |
Formato |
7 |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.98.151801 Physical Review Letters. College Pk: American Physical Soc, v. 98, n. 15, 7 p., 2007. 0031-9007 http://hdl.handle.net/11449/23989 10.1103/PhysRevLett.98.151801 WOS:000245691400014 WOS000245691400014.pdf |
Idioma(s) |
eng |
Publicador |
American Physical Soc |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |