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Nayak, M.*; 谷田 聖; Belle Collaboration*; 他180名*
Physical Review D, 102(7), p.071102_1 - 071102_8, 2020/10
被引用回数:6 パーセンタイル:42.3(Astronomy & Astrophysics)We report the first measurement of the charm-mixing parameter in decays to the -odd final state . The study uses the full Belle annihilation data sample of taken at or near the centre-of-mass energy. We find , where the first uncertainty is statistical, the second is systematic due to event selection and background, and the last is due to possible presence of -even decays in the data sample.
Guido, E.*; 谷田 聖; Belle Collaboration*; 他180名*
Physical Review D, 96(5), p.052005_1 - 052005_11, 2017/09
被引用回数:14 パーセンタイル:57.78(Astronomy & Astrophysics)We study hadronic transitions between bottomonium states using 496 fb data collected at the resonance with the Belle detector at the KEKB asymmetric energy collider. We measure , , and . We measure the ratio of branching fractions . We search for the decay , but do not find significant evidence for such a transition. We also measure the initial-state radiation production cross sections of the resonances and we find values compatible with the expected ones. Finally, the analysis of the events shows indications for a resonant contribution due to the meson.