Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Li, Y. B.*; 谷田 聖; Belle Collaboration*; 他161名*
Physical Review Letters, 122(8), p.082001_1 - 082001_7, 2019/03
被引用回数:36 パーセンタイル:90.14(Physics, Multidisciplinary)We present the first measurements of absolute branching fractions of decays into , , and final states. The measurements are made using a data set comprising pairs collected at the resonance with the Belle detector at the KEKB collider. We first measure the absolute branching fraction for using a missing-mass technique, the result is . We subsequently measure the product branching fractions , , and with improved precision. Dividing these product branching fractions by the result for yields the following branching fractions: , , and . Our result for can be combined with branching fractions measured relative to to yield other absolute branching fractions.
Seidl, R.*; 谷田 聖; Belle Collaboration*; 他161名*
Physical Review D, 96(3), p.032005_1 - 032005_21, 2017/08
被引用回数:11 パーセンタイル:50.23(Astronomy & Astrophysics)The inclusive cross sections for dihadrons of charged pions and kaons () in electron-positron annihilation are reported. They are obtained as a function of the total fractional energy and invariant mass for any di-hadron combination in the same hemisphere as defined by the thrust event-shape variable and its axis. Since same-hemisphere dihadrons can be assumed to originate predominantly from the same initial parton, di-hadron fragmentation functions are probed. These di-hadron fragmentation functions are needed as an unpolarized baseline in order to quantitatively understand related spin-dependent measurements in other processes and to apply them to the extraction of quark transversity distribution functions in the nucleon. The di-hadron cross sections are obtained from a 655 fb data sample collected at or near the resonance with the Belle detector at the KEKB asymmetric-energy collider.