Journal article

Measurement of branching fractions and CP violation parameters in B -> omega K decays with first evidence of CP violation in B-0 -> omega K-s(0)

V Chobanova, J Dalseno, C Kiesling, I Adachi, H Aihara, DM Asner, V Aulchenko, T Aushev, T Aziz, AM Bakich, A Bala, Y Ban, K Belous, B Bhuyan, A Bobrov, G Bonvicini, A Bozek, M Bracko, TE Browder, D Cervenkov Show all

Physical Review D | AMER PHYSICAL SOC | Published : 2014


We present a measurement of the branching fractions and charge-parity-(CP-)violating parameters in B→ωK decays. The results are obtained from the final data sample containing 772×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. We obtain the branching fractions B(B0→ωK0)=(4.5±0.4(stat)±0.3(syst))×10-6, B(B+→ωK+)=(6.8±0.4(stat)±0.4(syst))×10-6 which are in agreement with their respective current world averages. For the CP-violating parameters, we obtain AωKS0=-0.36±0.19(stat)±0. 05(syst),SωKS0=+0.91±0.32(stat)±0.05(syst),AωK+=-0. 03±0.04(stat)±0.01(syst), where A and S represent the direct and mixing-induced CP asymmetry, resp..

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University of Melbourne Researchers


Awarded by Australian Department of Industry, Innovation, Science and Research; Austrian Science Fund

Awarded by National Natural Science Foundation of China

Awarded by Ministry of Education, Youth and Sports of the Czech Republic

Awarded by National Research Foundation of Korea

Awarded by BRL program under NRF

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 SINET4 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 and the Australian Department of Industry, Innovation, Science and Research; Austrian Science Fund under Grant No. P 22742-N16; the National Natural Science Foundation of China under Contract No. 10575109, No. 10775142, No. 10825524, No. 10875115, No. 10935008, and No. 11175187; the Ministry of Education, Youth and Sports of the Czech Republic under Contract No. MSM0021620859; the Carl Zeiss Foundation, the Deutsche Forschungsgemeinschaft, and theVolkswagenStiftung; the Department of Science and Technology of India; the Istituto Nazionale di Fisica Nucleare of Italy; the WCU program of the Ministry of Education, Science and Technology; National Research Foundation of Korea Grants No. 2011-0029457, No. 2012-0008143, No. 2012R1A1A2008330, and No. 2013R1A1A3007772; the BRL program under NRF Grant No. KRF-2011-0020333, No. KRF-2011-0021196, the BK21Plus program, and the GSDCof theKorea Institute of Science and Technology Information; 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 Federal Agency for Atomic Energy; the Slovenian Research Agency; the Basque Foundation for Science (IKERBASQUE) and the UPV/EHU under Program No. UFI 11/55; the Swiss National Science Foundation; the National Science Council and the Ministry of Education of Taiwan; and the U. S. Department of Energy and the National Science Foundation. This work is supported by a Grant-in-Aid from MEXT for Science Research in a Priority Area (" New Development of Flavor Physics") and from JSPS for Creative Scientific Research (" Evolution of Tau-lepton Physics").