First Observation of CP Violation in B^0 →D(*)_(CP)h^0 Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data
Abstract
We report a measurement of the time-dependent CP asymmetry of B^0 →D(*)_(CP)h^0 decays, where the light neutral hadron h^0 is a π^0, η, or ω meson, and the neutral D meson is reconstructed in the CP eigenstates K+ K−, K^0_S π^0, or K^0_Sω. 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)×10^6 BB pairs recorded by the BABAR detector and (772±11)×10^6 BB pairs recorded by the Belle detector. We measure the CP asymmetry parameters –η_fS=+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^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.
Additional Information
© 2015 American Physical Society. Received 14 May 2015; published 16 September 2015. We thank the PEP-II and KEKB groups for the excellent operation of the accelerators, and the computing organizations that support BABAR and Belle. The Belle experiment wishes to acknowledge the KEK cryogenics group for efficient solenoid operations. This work was supported by ARC and DIISR (Australia); FWF (Austria); NSERC (Canada); NSFC (China); MSMT (Czechia); CEA and CNRS-IN2P3 (France); BMBF, CZF, DFG, and VS (Germany); DST (India); INFN (Italy); MEXT, JSPS and Nagoya TLPRC (Japan); MOE, MSIP, NRF, GSDC of KISTI, and BK21Plus (Korea); FOM (The Netherlands); NFR (Norway); MNiSW and NCN (Poland); MES and RFAAE (Russian Federation); ARRS (Slovenia); IKERBASQUE, MINECO and UPV/EHU (Spain); SNSF (Switzerland); NSC and MOE (Taiwan); STFC (United Kingdom); BSF (USA-Israel); and DOE and NSF (USA). Individuals have received support from the Marie Curie EIF (European Union) and the A. P. Sloan Foundation (USA).Attached Files
Published - PhysRevLett.115.121604.pdf
Submitted - 1505.04147v2.pdf
Files
1505.04147v2.pdf
Additional details
Additional titles
- Alternative title
- First Observation of CP Violation in B0->D(*)CP h0 Decays by a Combined Time-Dependent Analysis of BaBar and Belle Data
Identifiers
- Eprint ID
- 61145
- Resolver ID
- CaltechAUTHORS:20151015-103355620
Related works
- Describes
- http://arxiv.org/abs/1505.04147 (URL)
Funding
- Australian Research Council
- Department of Innovation, Industry, Science and Research (DIISR)
- FWF Der Wissenschaftsfonds
- Natural Sciences and Engineering Research Council of Canada (NSERC)
- National Natural Science Foundation of China
- MSMT (Czechia)
- Commissariat à l'Energie Atomique (CEA)
- Centre National de la Recherche Scientifique (CNRS)
- Bundesministerium für Bildung und Forschung (BMBF)
- CZF (Germany)
- Deutsche Forschungsgemeinschaft (DFG)
- VS (Germany)
- Department of Science and Technology (India)
- Istituto Nazionale di Fisica Nucleare (INFN)
- Ministry of Education, Culture, Sports, Science and Technology (MEXT)
- Japan Society for the Promotion of Science (JSPS)
- Nagoya TLPRC (Japan)
- Ministry of Education (Korea)
- MSIP (Korea)
- National Research Foundation of Korea
- GSDC of KISTI (Korea)
- BK21Plus (Korea)
- Stichting voor Fundamenteel Onderzoek der Materie (FOM)
- NFR (Norway)
- MNiSW (Poland)
- NCN (Poland)
- MES (Russia)
- RFAAE (Russia)
- ARRS (Slovenia)
- IKERBASQUE (Spain)
- Ministerio de Economía y Competitividad (MINECO)
- UPV/EHU (Spain)
- Swiss National Science Foundation (SNSF)
- National Science Council (Taipei)
- Ministry of Education (Taipei)
- Science and Technology Facilities Council (STFC)
- Binational Science Foundation (USA-Israel)
- Department of Energy (DOE)
- NSF
- Marie Curie Fellowship
- Alfred P. Sloan Foundation
Dates
- Created
-
2015-10-15Created from EPrint's datestamp field
- Updated
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2021-11-10Created from EPrint's last_modified field