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Open Access item Improved measurement of time-dependent CP asymmetries and the CP-odd fraction in the decay B(0) -> D*D(+)*(-)

Authors:Grauges, E.
Davier, Michel
Chen, Shaomin
Azzolini, Virginia
López-March, Neus
Martínez-Vidal, Fernando
Milanés, Diego A.
Oyanguren, Arantza
Höcker, Andreas
Babar Collaboration
Aubert, B.
Keywords:Violating asymmetries, [PACS] Hadronic decays of bottom mesons, [PACS] Charge conjugation, parity, time reversal, and other discrete symmetries in particles and fields, [PACS] Determination of electroweak Kobayashi–Maskawa matrix elements
Issue Date:26-Dec-2007
Publisher:American Physical Society
Citation:Physical Review D 76(11): 111102 (2007)
Abstract:We present an updated measurement of the CP-odd fraction and the time-dependent CP asymmetries in the decay B(0) -> D*D(+)*(-) using (383 ± 4)x10(6)B[overline B] pairs collected with the BABAR detector. We determine the CP-odd fraction to be 0.143±0.034(stat)±0.008(syst). The time-dependent CP asymmetry parameters are determined to be C(+)=-0.05±0.14(stat)±0.02(syst) and S(+)=-0.72±0.19(stat)±0.05(syst). The nonzero value of the measured S(+) indicates the evidence of CP violation at the 3.7σ confidence level.
Description:8 pages, 3 figures, 1 table.-- PACS nrs.: 13.25.Hw; 11.30.Er; 12.15.Hh.-- ISI Article Identifier: 000251987200002.-- ArXiv pre-print available at: http://arxiv.org/abs/0708.1549.-- et al.
Publisher version (URL):http://dx.doi.org/10.1103/PhysRevD.76.111102
URI:http://hdl.handle.net/10261/9896
ISSN:1550-7998
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Appears in Collections:(IFIC) Artículos

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