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Jia, S.*; 谷田 聖; Belle Collaboration*; 他170名*
Physical Review D, 95(1), p.012001_1 - 012001_13, 2017/01
被引用回数:21 パーセンタイル:69.35(Astronomy & Astrophysics)We report the first search for the glueball in
and
decays with data samples of
million and
million events, respectively, collected with the Belle detector. No significant signals are observed in any of the proposed production modes, and the 90% credibility level upper limits on their branching fractions in
and
decays are obtained. The inclusive branching fractions of the
and
decays into final states with a
are measured to be
with an improved precision over prior measurements and
for the first time.
Chang, Y. Y.*; 谷田 聖; Belle Collaboration*; 他170名*
Physical Review Letters, 115(22), p.221803_1 - 221803_8, 2015/11
被引用回数:11 パーセンタイル:60.53(Physics, Multidisciplinary)We report the first observation of the decays . The data sample of 711 fb
used in this analysis corresponds to
pairs, collected at the
resonance by the Belle detector at the KEKB asymmetric-energy
collider. We observe
and
excesses of events for the two decay modes and measure the branching fractions of
and
to be
and
, respectively, where the first uncertainties are statistical and the second are systematic. These results are not compatible with the predictions based on the generalized factorization approach. In addition, a threshold enhancement in the dibaryon (
) system is observed, consistent with that observed in similar
decays.
山我 拓巳*; 谷田 聖; J-PARC E31 Collaboration*; 他70名*
JPS Conference Proceedings (Internet), 8, p.021016_1 - 021016_5, 2015/09
We are planning to carry out an experimental study of hyperon resonance via the reaction using kaon beam which has momentum of 1 GeV/
at the J-PARC hadron experimental facility. In the presented reaction,
can be produced dynamically from meson-baryon resonant state. The performance of the counters was tested at the previous beam time of the J-PARC. The counters worked as expected. The preparation of experimental setup had been done.