Measurement of the mixing-induced CP-violating phase Φ<inf>s</inf> in B<sup>0</sup><inf>s</inf> decays is of prime importance in probing new physics. Here 7421 ± 105 signal events from the dominantly CP-odd final state J/ψπ<sup>+</sup>π<sup>-</sup> are selected in 1 fb<sup>-1</sup> of pp collision data collected at √ s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Φ<inf>s</inf> = -0.019<sup>+0.173+0.004</sup> <inf>-0.174-0.003</inf> rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.

Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2012). Measurement of the CP-violating phase Φs in B0s → J/ψ π+ π- decays. PHYSICS LETTERS. SECTION B, 713(4-5), 378-386 [10.1016/j.physletb.2012.06.032].

Measurement of the CP-violating phase Φs in B0s → J/ψ π+ π- decays

CALVI, MARTA;Martinelli, M;MATTEUZZI, CLARA;PEREGO, DAVIDE LUIGI;PESSINA, GIANLUIGI EZIO;
2012

Abstract

Measurement of the mixing-induced CP-violating phase Φs in B0s decays is of prime importance in probing new physics. Here 7421 ± 105 signal events from the dominantly CP-odd final state J/ψπ+π- are selected in 1 fb-1 of pp collision data collected at √ s = 7 TeV with the LHCb detector. A timedependent fit to the data yields a value of Φs = -0.019+0.173+0.004 -0.174-0.003 rad, consistent with the Standard Model expectation. No evidence of direct CP violation is found.
Articolo in rivista - Articolo scientifico
Nuclear and High Energy Physics
English
2012
713
4-5
378
386
none
Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Adrover, C., Affolder, A., et al. (2012). Measurement of the CP-violating phase Φs in B0s → J/ψ π+ π- decays. PHYSICS LETTERS. SECTION B, 713(4-5), 378-386 [10.1016/j.physletb.2012.06.032].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10281/154334
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