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http://acervodigital.unesp.br/handle/11449/70418- Title:
- Study of direct CP violation in B±→J/ ψK±(π±) decays
- Abazov, V. M.
- Abbott, B.
- Abolins, M.
- Acharya, B. S.
- Adams, M.
- Adams, T.
- Aguilo, E.
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- Mercadante, P. G.
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- Zverev, E. G.
- Universidad de Buenos Aires
- Centro Brasileiro de Pesquisas Físicas (CBPF)
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- Universität Zürich
- 0031-9007
- 1079-7114
- 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.
- 30-May-2008
- Physical Review Letters, v. 100, n. 21, 2008.
- Colliding beam accelerators
- Electric charge
- Fermi level
- Mathematical models
- Charge asymmetry
- Fermilab Tevatron Collider
- Standard models
- High energy physics
- http://dx.doi.org/10.1103/PhysRevLett.100.211802
- Acesso restrito
- outro
- http://repositorio.unesp.br/handle/11449/70418
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