Study of direct CP violation in B±→J/ ψK±(π±) decays
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
27/05/2014
27/05/2014
30/05/2008
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Resumo |
We present a search for direct CP violation in B±→J/ ψK±(π±) decays. The event sample is selected from 2.8fb-1 of pp̄ collisions recorded by D0 experiment in run II of the Fermilab Tevatron Collider. The charge asymmetry ACP(B+→J/ψK+)=+0.0075±0. 0061(stat)±0.0030(syst) is obtained using a sample of approximately 40000 B±→J/ψK± decays. The achieved precision is of the same level as the expected deviation predicted by some extensions of the standard model. We also measured the charge asymmetry ACP(B+→J/ψπ+)=-0. 09±0.08(stat)±0.03(syst). © 2008 The American Physical Society. |
Identificador |
http://dx.doi.org/10.1103/PhysRevLett.100.211802 Physical Review Letters, v. 100, n. 21, 2008. 0031-9007 1079-7114 http://hdl.handle.net/11449/70418 10.1103/PhysRevLett.100.211802 2-s2.0-44649097173 2-s2.0-44649097173.pdf |
Idioma(s) |
eng |
Relação |
Physical Review Letters |
Direitos |
closedAccess |
Palavras-Chave | #Colliding beam accelerators #Electric charge #Fermi level #Mathematical models #Charge asymmetry #Fermilab Tevatron Collider #Standard models #High energy physics |
Tipo |
info:eu-repo/semantics/article |