Yamaguchi, Yasuhiro; Garca-Tecocoatzi, H.*; Giachino, A.*; Hosaka, Atsushi; Santopinto, E.*; Takeuchi, Sachiko*; Takizawa, Makoto*
Few-Body Systems, 62(3), p.33_1 - 33_7, 2021/09
We investigate the hidden-charm pentaquarks as hadronic molecules of and coupled to a compact core by employing an interaction satisfying the heavy quark and chiral symmetries. Our model can consistently explain the masses and decay widths of , and with spin parity assignments , and , respectively. We find that the mass ordering is dominantly determined by the short-range interaction given by coupling to the compact core, while the decay widths by the tensor force of the one-pion exchange.
Hwang, S. H.*; Hicks, K.*; Ahn, J. K.*; Nakano, Takashi*
Few-Body Systems, 54(7-10), p.1037 - 1041, 2013/08
Imai, Kenichi; Ichikawa, Yudai; Hasegawa, Shoichi; Sako, Hiroyuki; Sato, Susumu; Kiuchi, Ryuta*; Hosomi, Kenji; Sugimura, Hitoshi; 36 of others*
Few-Body Systems, 54(7-10), p.1191 - 1194, 2013/08
In the J-PARC E27 experiment, we search for a bound state via the reaction at 1.7 GeV/c at the K1.8 beam line. The binding energy and decay width of the bound state can be obtained in the missing mass measurement with a good energy resolution of 2 MeV/c. A range counter array (RCA) was constructed to detect the two high-momentum protons from the decay and to reduce the background such as quasi-free hyperon production. Recently, we have carried out a pilot run in June, 2012. The missing-mass spectrum has been obtained for the first time.
Naruki, Megumi*; Sugimura, Hitoshi; Imai, Kenichi; Ichikawa, Yudai; Hosomi, Kenji; 68 of others*
Few-Body Systems, 54(7-10), p.955 - 960, 2013/08
no abstracts in English
Sugimura, Hitoshi; Imai, Kenichi; 34 of others*
Few-Body Systems, 54(7-10), p.1235 - 1238, 2013/08
no abstracts in English
Few-Body Systems, 54(1-4), p.145 - 150, 2013/03
The pentaquark baryon was searched for via the reaction at J-PARC. meson beams were irradiated on the liquid hydrogen target with the beam momentum of 1.92 GeV/. In the missing mass spectrum, no peak structure corresponding to mass was observed. The preliminary upper limit of the differential cross section averaged over the scattering angle of 2 to 15 at the laboratory frame was less than 0.3 b/sr at the 90% confidence level in the missing mass region over 1.51 GeV/ to 1.55 GeV/.