The first observation of the decays anti-B0s → Ds+ K− π+ π− and anti-B0 → Ds+ K− π+ π− are reported using an integrated luminosity of 1.0 fb^−1 recorded by the LHCb experiment. The branching fractions, normalized with respect to anti-B0s → Ds+ π− π+ π− and anti-B0s → Ds+ K− π+ π−, respectively, are measured to be B(anti-B0s → Ds+ K− π+ π−)/B(anti-B0s → Ds+ π− π+ π−) = (5.2 ± 0.5 ± 0.3) x 10^−2 and B(anti-B0 → Ds+ K− π+ π−)/B(anti-B0s → Ds+ K− π+ π−) = 0.54 ± 0.07 ± 0.07, where the first uncertainty is statistical and the second is systematic. The anti-B0s → Ds+ K− π+ π− decay is of particular interest as it can be used to measure the weak phase γ. First observation of the anti-B0s → Ds1(2536)+ π−, Ds1+ → Ds+ π− π+ decay is also presented, and its branching fraction relative to anti-B0s → Ds+ π− π+ π− is found to be B(anti-B0s → Ds1(2536)+ π−, Ds1+ → Ds+ π− π+)/B(anti-B0s → Ds+ π− π+ π−) = (4.0 ± 1.0 ± 0.4) x 10^−3.

R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2012). First Observation of the Decays anti-B0(s) → Ds+ K− π+ π− and anti-B0s → Ds1(2536)+ π−. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 86(11), 1-11 [10.1103/PhysRevD.86.112005].

First Observation of the Decays anti-B0(s) → Ds+ K− π+ π− and anti-B0s → Ds1(2536)+ π−

CARBONE, ANGELO;GALLI, DOMENICO;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;
2012

Abstract

The first observation of the decays anti-B0s → Ds+ K− π+ π− and anti-B0 → Ds+ K− π+ π− are reported using an integrated luminosity of 1.0 fb^−1 recorded by the LHCb experiment. The branching fractions, normalized with respect to anti-B0s → Ds+ π− π+ π− and anti-B0s → Ds+ K− π+ π−, respectively, are measured to be B(anti-B0s → Ds+ K− π+ π−)/B(anti-B0s → Ds+ π− π+ π−) = (5.2 ± 0.5 ± 0.3) x 10^−2 and B(anti-B0 → Ds+ K− π+ π−)/B(anti-B0s → Ds+ K− π+ π−) = 0.54 ± 0.07 ± 0.07, where the first uncertainty is statistical and the second is systematic. The anti-B0s → Ds+ K− π+ π− decay is of particular interest as it can be used to measure the weak phase γ. First observation of the anti-B0s → Ds1(2536)+ π−, Ds1+ → Ds+ π− π+ decay is also presented, and its branching fraction relative to anti-B0s → Ds+ π− π+ π− is found to be B(anti-B0s → Ds1(2536)+ π−, Ds1+ → Ds+ π− π+)/B(anti-B0s → Ds+ π− π+ π−) = (4.0 ± 1.0 ± 0.4) x 10^−3.
2012
R. Aaij, C. Abellan Beteta, A. Adametz, B. Adeva, M. Adinolfi, C. Adrover, et al. (2012). First Observation of the Decays anti-B0(s) → Ds+ K− π+ π− and anti-B0s → Ds1(2536)+ π−. PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY, 86(11), 1-11 [10.1103/PhysRevD.86.112005].
R. Aaij; C. Abellan Beteta; A. Adametz; B. Adeva; M. Adinolfi; C. Adrover; A. Affolder; Z. Ajaltouni; J. Albrecht; F. Alessio; M. Alexander; S. Ali; G...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/132994
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