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

Abdesselam, A. and Chao, D. S. and Cheng, C. H. and Echenard, B. and Flood, K. T. and Hitlin, D. G. and Miyashita, T. S. and Ongmongkolkul, P. and Porter, F. C. and Röhrken, M. (2015) First Observation of CP Violation in B^0 →D(*)_(CP)h^0 Decays by a Combined Time-Dependent Analysis of BABAR and Belle Data. Physical Review Letters, 115 (12). Art. No. 121604. ISSN 0031-9007. https://resolver.caltech.edu/CaltechAUTHORS:20151015-103355620

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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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.115.121604 DOIArticle
http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.121604PublisherArticle
http://arxiv.org/abs/1505.04147arXivDiscussion Paper
ORCID:
AuthorORCID
Hitlin, D. G.0000-0003-4028-6982
Porter, F. C.0000-0003-1948-8889
Alternate Title:First Observation of CP Violation in B0->D(*)CP h0 Decays by a Combined Time-Dependent Analysis of BaBar and Belle Data
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).
Funders:
Funding AgencyGrant Number
Australian Research CouncilUNSPECIFIED
Department of Innovation, Industry, Science and Research (DIISR)UNSPECIFIED
FWF Der WissenschaftsfondsUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
National Natural Science Foundation of ChinaUNSPECIFIED
MSMT (Czechia)UNSPECIFIED
Commissariat à l’Energie Atomique (CEA)UNSPECIFIED
Centre National de la Recherche Scientifique (CNRS)UNSPECIFIED
Bundesministerium für Bildung und Forschung (BMBF)UNSPECIFIED
CZF (Germany)UNSPECIFIED
Deutsche Forschungsgemeinschaft (DFG)UNSPECIFIED
VS (Germany)UNSPECIFIED
Department of Science and Technology (India)UNSPECIFIED
Istituto Nazionale di Fisica Nucleare (INFN)UNSPECIFIED
Ministry of Education, Culture, Sports, Science and Technology (MEXT)UNSPECIFIED
Japan Society for the Promotion of Science (JSPS)UNSPECIFIED
Nagoya TLPRC (Japan)UNSPECIFIED
Ministry of Education (Korea)UNSPECIFIED
MSIP (Korea)UNSPECIFIED
National Research Foundation of KoreaUNSPECIFIED
GSDC of KISTI (Korea)UNSPECIFIED
BK21Plus (Korea)UNSPECIFIED
Stichting voor Fundamenteel Onderzoek der Materie (FOM)UNSPECIFIED
NFR (Norway)UNSPECIFIED
MNiSW (Poland)UNSPECIFIED
NCN (Poland)UNSPECIFIED
MES (Russia)UNSPECIFIED
RFAAE (Russia)UNSPECIFIED
ARRS (Slovenia)UNSPECIFIED
IKERBASQUE (Spain)UNSPECIFIED
Ministerio de Economía y Competitividad (MINECO)UNSPECIFIED
UPV/EHU (Spain)UNSPECIFIED
Swiss National Science Foundation (SNSF)UNSPECIFIED
National Science Council (Taipei)UNSPECIFIED
Ministry of Education (Taipei)UNSPECIFIED
Science and Technology Facilities Council (STFC)UNSPECIFIED
Binational Science Foundation (USA-Israel)UNSPECIFIED
Department of Energy (DOE)UNSPECIFIED
NSFUNSPECIFIED
Marie Curie FellowshipUNSPECIFIED
Alfred P. Sloan FoundationUNSPECIFIED
Issue or Number:12
Classification Code:PACS numbers: 13.25.Hw, 11.30.Er, 12.15.Hh
Record Number:CaltechAUTHORS:20151015-103355620
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20151015-103355620
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:61145
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:15 Oct 2015 18:10
Last Modified:03 Oct 2019 09:04

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