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pair production in single-tag two-photon collisions増田 正孝*; 谷田 聖; Belle Collaboration*; 他185名*
Physical Review D, 97(5), p.052003_1 - 052003_20, 2018/03
被引用回数：6 パーセンタイル：32.94(Astronomy & Astrophysics)We report a measurement of the cross section for pair production in single-tag two-photon collisions, 
, for 
up to 30 GeV
, where is the negative of the invariant mass squared of the tagged photon. The measurement covers the kinematic range 1.0 GeV 
2.6 GeV and 
for the total energy and kaon scattering angle, respectively, in the 
center-of-mass system. These results are based on a data sample of 759 fb
collected with the Belle detector at the KEKB asymmetric-energy 
collider. For the first time, the transition form factor of the 
meson is measured separately for the helicity-0, -1, and -2 components and also compared with theoretical calculations. Finally, the partial decay widths of the 
and 
mesons are measured as a function of .
pair production in single-tag two-photon collisions増田 正孝*; 谷田 聖; Belle Collaboration*; 他178名*
Physical Review D, 93(3), p.032003_1 - 032003_34, 2016/02
被引用回数：47 パーセンタイル：88.25(Astronomy & Astrophysics)We report a measurement of the differential cross section of pair production in single-tag two-photon collisions, 
, in 
scattering. The cross section is measured for up to 30 GeV, where is the negative of the invariant mass squared of the tagged photon, in the kinematic range 0.5 GeV 2.1 GeV and 
for the total energy and pion scattering angle, respectively, in the 
center-of-mass system. The results are based on a data sample of 759 fb collected with the Belle detector at the KEKB asymmetric-energy collider. The transition form factor of the 
and that of the 
with the helicity-0, -1, and -2 components separately are measured for the first time and are compared with theoretical calculations.
