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First Observation of CP Violation in B ̄ 0 → DCP (∗) h0 Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data

Abdesselam, A.
•
Adachi, I.
•
Adametz, A.
altro
Zupanc, A.
2015
  • journal article

Periodico
PHYSICAL REVIEW LETTERS
Abstract
We report a measurement of the time-dependent CP asymmetry of B ̄0→D(*)CPh0 decays, where the light neutral hadron h0 is a π0, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K+K−, K0Sπ0, or K0Sω. The measurement is performed combining the final data samples collected at the Υ(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)×106BB ̄ pairs recorded by the BABAR detector and (772±11)×106BB ̄ pairs recorded by the Belle detector. We measure the CP asymmetry parameters −ηf=+0.66±0.10(stat)±0.06(syst) and =−0.02±0.07(stat)±0.03(syst). These results correspond to the first observation of CP violation in B ̄0→D(*)CPh0 decays. The hypothesis of no mixing-induced CP violation is excluded in these decays at the level of 5.4 standard deviations.
DOI
10.1103/PhysRevLett.115.121604
WOS
WOS:000361316500005
Archivio
http://hdl.handle.net/11368/2863578
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84942156070
http://harvest.aps.org/bagit/articles/10.1103/PhysRevLett.115.121604/apsxml
Diritti
open access
license:digital rights management non definito
FVG url
https://arts.units.it/bitstream/11368/2863578/1/PhysRevLett.115.121604.pdf
Soggetti
  • 13.25.Hw Decays of bo...

  • 11.30.Er Charge conju...

  • parity

  • time reversal and oth...

  • 12.15.Hh Determinatio...

Web of Science© citazioni
18
Data di acquisizione
Mar 26, 2024
Visualizzazioni
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Data di acquisizione
Apr 19, 2024
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