Measurements of direct CP asymmetries in B -> X-s gamma decays using sum of exclusive decays
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Measurements of direct CP asymmetries in B -> X-s gamma decays using sum of exclusive decays

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Measurements of direct CP asymmetries in B -> X-s gamma decays using sum of exclusive decays

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dc.contributor.author BABAR Collaboration
dc.contributor.author Martínez Vidal, Fernando
dc.contributor.author Oyanguren Campos, Arantza
dc.contributor.author Villanueva Pérez, Pablo
dc.date.accessioned 2016-04-20T09:43:03Z
dc.date.available 2016-04-20T09:43:03Z
dc.date.issued 2014
dc.identifier.uri http://hdl.handle.net/10550/52866
dc.description.abstract We measure the direct CP violation asymmetry, A(CP), in B -> X-s gamma and the isospin difference of the asymmetry, Delta A(CP), using 429 fb(-1) of data collected at Upsilon(4S) resonance with the BABAR detector at the PEP- II asymmetric- energy e(+)e(-) storage rings operating at the SLAC National Accelerator Laboratory. B mesons are reconstructed from ten charged B final states and six neutral B final states. We find A(CP) = +(1.7 +/- 1.9 +/- 1.0)%, which is in agreement with the Standard Model prediction and provides an improvement on the world average. Moreover, we report the first measurement of the difference between A(CP) for charged and neutral decay modes, Delta A(CP) = +(5.0 +/- 3.9 +/- 1.5)%. Using the value of Delta A(CP), we also provide 68% and 90% confidence intervals on the imaginary part of the ratio of theWilson coefficients corresponding to the chromomagnetic dipole and the electromagnetic dipole transitions.
dc.language.iso eng
dc.relation.ispartof Physical Review D, 2014, vol. 90, num. 9, p. 092001-1-092001-12
dc.rights.uri info:eu-repo/semantics/openAccess
dc.source BABAR Collaboration Martínez Vidal, Fernando Oyanguren Campos, Arantza Villanueva Pérez, Pablo 2014 Measurements of direct CP asymmetries in B -> X-s gamma decays using sum of exclusive decays Physical Review D 90 9 092001-1 092001-12
dc.subject Física nuclear
dc.title Measurements of direct CP asymmetries in B -> X-s gamma decays using sum of exclusive decays
dc.type info:eu-repo/semantics/article
dc.date.updated 2016-04-20T09:43:03Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.90.092001
dc.identifier.idgrec 101846

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