Observation of D-0 -> rho(0)gamma and Search for CP Violation in Radiative Charm Decays

T Nanut; A Zupanc; I Adachi; H Aihara; S Al Said; DM Asner; V Aulchenko; T Aushev; R Ayad; V Babu; I Badhrees; AM Bakich; V Bansal; P Behera; V Bhardwaj; J Biswal; A Bondar; A Bozek; M Bracko; TE Browder; D Cervenkov; V Chekelian; A Chen; BG Cheon; R Chistov; K Cho; S-K Choi; Y Choi; D Cinabro; N Dash; S Di Carlo; Z Dolezal; D Dutta; S Eidelman; H Farhat; JE Fast; T Ferber; BG Fulsom; V Gaur; N Gabyshev; A Garmash; R Gillard; P Goldenzweig; B Golob; K Hayasaka; H Hayashii; W-S Hou; T Iijima; K Inami; G Inguglia; A Ishikawa; Y Iwasaki; WW Jacobs; I Jaegle; D Joffe; KK Joo; T Julius; AB Kaliyar; KH Kang; T Kawasaki; DY Kim; JB Kim; KT Kim; MJ Kim; SH Kim; K Kinoshita; P Kodys; S Korpar; P Krokovny; T Kuhr; R Kulasiri; A Kuzmin; Y-J Kwon; JS Lange; IS Lee; CH Li; L Li; Y Li; L Li Gioi; J Libby; D Liventsev; M Lubej; M Masuda; T Matsuda; D Matvienko; K Miyabayashi; H Miyata; R Mizuk; GB Mohanty; HK Moon; M Nakao; KJ Nath; M Nayak; NK Nisar; S Nishida; S Ogawa; S Okuno; P Pakhlov; G Pakhlova; B Pal; C-S Park; CW Park; H Park; S Paul; TK Pedlar; L Pesantez; R Pestotnik; M Petric; LE Piilonen; K Prasanth; C Pulvermacher; J Rauch; M Ritter; A Rostomyan; Y Sakai; S Sandilya; L Santelj; T Sanuki; Y Sato; V Savinov; T Schulter; O Schneider; G Schnell; C Schwanda; AJ Schwartz; Y Seino; K Senyo; O Seon; ME Sevior; V Shebalin; CP Shen; T-A Shibata; J-G Shiu; B Shwartz; E Solovieva; S Stanic; M Staric; JF Strube; J Stypula; T Sumiyoshi; M Takizawa; U Tamponi; F Tenchini; K Trabelsi; M Uchida; S Uno; Y Ushiroda; G Varner; A Vinokurova; V Vorobyev; A Vossen; CH Wang; M-Z Wang; P Wang; Y Watanabe; E Widmann; E Won; J Yamaoka; Y Yamashita; J Yelton; ZP Zhang; V Zhilich; V Zhukova; V Zhulanov

Journal article

Observation of D-0 -> rho(0)gamma and Search for CP Violation in Radiative Charm Decays

T Nanut, A Zupanc, I Adachi, H Aihara, S Al Said, DM Asner, V Aulchenko, T Aushev, R Ayad, V Babu, I Badhrees, AM Bakich, V Bansal, P Behera, V Bhardwaj, J Biswal, A Bondar, A Bozek, M Bracko, TE Browder Show all

Physical Review Letters | American Physical Society | Published : 2017

DOI: 10.1103/PhysRevLett.118.051801

Abstract

We report the first observation of the radiative charm decay D0→ρ0γ and the first search for CP violation in decays D0→ρ0γ, ϕγ, and ¯K*0(892)γ, using a data sample of 943 fb−1 collected with the Belle detector at the KEKB asymmetric-energy e+e− collider. The branching fraction is measured to be B(D0→ρ0γ)=(1.77±0.30±0.07)×10−5, where the first uncertainty is statistical and the second is systematic. The obtained CP asymmetries ACP(D0→ρ0γ)=+0.056±0.152±0.006, ACP(D0→ϕγ)=−0.094±0.066±0.001, and ACP(D0→¯K*0γ)=−0.003±0.020±0.000 are consistent with no CP violation. We also present an improved measurement of the branching fractions B(D0→ϕγ)=(2.76±0.19±0.10)×10−5 and B(D0→¯K*0γ)=(4.66±0.21±0.21)×1..

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University of Melbourne Researchers

Martin Sevior Author

G. N. Taylor Author

Grants

Funding Acknowledgements

We thank the KEKB group for the excellent operation of the accelerator; the KEK cryogenics group for the efficient operation of the solenoid; and the KEK computer group, the National Institute of Informatics, and the PNNL/EMSL computing group for valuable computing and SINET5 network support. We acknowledge support from the Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan, the Japan Society for the Promotion of Science (JSPS), and the Tau-Lepton Physics Research Center of Nagoya University; the Australian Research Council; Austrian Science Fund; the National Natural Science Foundation of China; the Chinese Academy of Science Center for Excellence in Particle Physics; the Ministry of Education, Youth and Sports of the Czech Republic; the Carl Zeiss Foundation, the Deutsche Forschungsgemeinschaft, the Excellence Cluster Universe, and the VolkswagenStiftung; the Department of Science and Technology of India; the Istituto Nazionale di Fisica Nucleare of Italy; the WCU program of the Ministry of Education, National Research Foundation (NRF) of Korea; the Brain Korea 21-Plus program and Radiation Science Research Institute; the Polish Ministry of Science and Higher Education and the National Science Center; the Ministry of Education and Science of the Russian Federation and the Russian Foundation for Basic Research; the Slovenian Research Agency; Ikerbasque, Basque Foundation for Science and the Euskal Herriko Unibertsitatea (UPV/EHU) (Spain); the Swiss National Science Foundation; the Ministry of Education and the Ministry of Science and Technology of Taiwan; and DOE and NSF (USA).