Study of direct CP violation in B±→J/ ψK±(π±) decays

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Data

2008-05-30

Autores

Abazov, V. M.
Abbott, B.
Abolins, M.
Acharya, B. S.
Adams, M.
Adams, T.
Aguilo, E.
Ahn, S. H.
Ahsan, M.
Alexeev, G. D.

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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.

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Colliding beam accelerators, Electric charge, Fermi level, Mathematical models, Charge asymmetry, Fermilab Tevatron Collider, Standard models, High energy physics

Como citar

Physical Review Letters, v. 100, n. 21, 2008.