Journal article

Study of the K pi( ) pi(-) final state in B -> J/psi K pi( ) pi(-) and B -> psi ' K pi( ) pi(-)

H Guler, H Aihara, K Arinstein, V Aulchenko, T Aushev, AM Bakich, V Balagura, E Barberio, K Belous, V Bhardwaj, M Bischofberger, A Bozek, M Bracko, TE Browder, P Chang, Y Chao, A Chen, P Chen, BG Cheon, K Cho Show all



Using 535×106 B-meson pairs collected by the Belle detector at the KEKB e+e- collider, we measure branching fractions of (7.16±0.10(stat)±0.60(syst)×10-4 for B +→J/ψK+π+π- and (4.31±0.20(stat)±0.50(syst))×10-4 for B +→ψ′K+π+π -. We perform amplitude analyses to determine the resonant structure of the K+π+π- final state in B +→J/ψK+π+π- and B+→ψ′K+π+π - and find that the K1(1270) is a prominent component of both decay modes. There is significant interference among the different intermediate states, which leads, in particular, to a striking distortion of the ρ line shape due to the ω. Based on the results of the fit to the B+→J/ψK+π+π- data, the relative decay fractions of the K1(1270) to Kρ, ..

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Awarded by National Natural Science Foundation of China

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

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 and the National Institute of Informatics for valuable computing and SINET3 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; the National Natural Science Foundation of China under Contract No. 10575109, 10775142, 10875115, and 10825524; the Ministry of Education, Youth, and Sports of the Czech Republic under Contract No. LA10033 and MSM0021620859; the Department of Science and Technology of India; the BK21 and WCU program of the Ministry Education Science and Technology, National Research Foundation of Korea, and NSDC of the Korea Institute of Science and Technology Information; the Polish Ministry of Science and Higher Education; the Ministry of Education and Science of the Russian Federation and the Russian Federal Agency for Atomic Energy; the Slovenian Research Agency; the Swiss National Science Foundation; the National Science Council and the Ministry of Education of Taiwan; and the U.S. Department of Energy. 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'').