Measurement of the CP-violation parameter of B-0 mixing and decay with p(p)over-bar ->mu mu X data
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/11/2006
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Resumo |
We measure the dimuon charge asymmetry A in p (p) over bar collisions at a center of mass energy root s=1960 GeV. The data was recorded with the D0 detector and corresponds to an integrated luminosity of approximately 1.0 fb(-1). Assuming that the asymmetry A is due to asymmetric B-0 <->(B) over bar (0) mixing and decay, we extract the CP-violation parameter of B-0 mixing and decay: ((epsilon B0))/(1+vertical bar epsilon B0 vertical bar 2)=(AB0)/(4)= -0.0023 +/- 0.0011(stat)+/- 0.0008(syst).A(B)(0) is the dimuon charge asymmetry from decays of B-0(B) over bar (0) pairs. The general case, with CP violation in both B-0 and B-s(0) systems, is also considered. Finally we obtain the forward-backward asymmetry that quantifies the tendency of mu(+) to go in the proton direction and mu(-) to go in the antiproton direction. The results are consistent with the standard model and constrain new physics. |
Formato |
12 |
Identificador |
http://dx.doi.org/10.1103/PhysRevD.74.092001 Physical Review D. College Pk: American Physical Soc, v. 74, n. 9, 12 p., 2006. 1550-7998 http://hdl.handle.net/11449/23838 10.1103/PhysRevD.74.092001 WOS:000242409700006 WOS000242409700006.pdf |
Idioma(s) |
eng |
Publicador |
American Physical Soc |
Relação |
Physical Review D |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |