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First Observation of CP Violation in (B)over-bar(0) -˃ D(CP)((*))h(0) Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data

Title
First Observation of CP Violation in (B)over-bar(0) -˃ D(CP)((*))h(0) Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data
Author
천병구
Keywords
DETECTOR; PHYSICS
Issue Date
2015-09
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW LETTERS, v. 115, NO 12, Page. 121604-121604
Abstract
We report a measurement of the time-dependent CP asymmetry of (B) over bar (0) -˃ D(CP)((*))h(0) decays, where the light neutral hadron h(0) is a pi(0), eta , or omega meson, and the neutral D meson is reconstructed in the CP eigenstates K+K-, K-S(0)pi(0) or K-S(0)omega. The measurement is performed combining the final data samples collected at the Upsilon(4S) resonance by the BABAR and Belle experiments at the asymmetric-energy B factories PEP-II at SLAC and KEKB at KEK, respectively. The data samples contain (471 +/- 3) x 10(6) B (B) over bar pairs recorded by the BABAR detector and (772 +/- 11) x 10(6) B (B) over bar pairs recorded by the Belle detector. We measure the CP asymmetry parameters -eta S-f = +0.66 +/- 0.10(stat) +/- 0.06(syst) and C = -0.02 +/- 0.07(stat) +/- 0.03(syst). These results correspond to the first observation of CP violation in (B) over bar (0) -˃ D(CP)((*))h(0) decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.
URI
http://adsabs.harvard.edu/abs/arXiv:1505.04147http://hdl.handle.net/20.500.11754/27488
ISSN
0031-9007; 1079-7114
DOI
10.1103/PhysRevLett.115.121604
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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