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Journal Articles

Heavy hadronic molecules coupled with multiquark states

Yamaguchi, Yasuhiro; Garc$'i$a-Tecocoatzi, H.*; Giachino, A.*; Hosaka, Atsushi; Santopinto, E.*; Takeuchi, Sachiko*; Takizawa, Makoto*

Few-Body Systems, 62(3), p.33_1 - 33_7, 2021/09

 Times Cited Count:0 Percentile:0(Physics, Multidisciplinary)

We investigate the hidden-charm pentaquarks as hadronic molecules of $$Lambda_cbar{D}^{(ast)}$$ and $$Sigma_c^{(ast)}bar{D}^{(ast)}$$ coupled to a $$uudcbar{c}$$ compact core by employing an interaction satisfying the heavy quark and chiral symmetries. Our model can consistently explain the masses and decay widths of $$P_c^+(4312)$$, $$P_c^+(4440)$$ and $$P_c^+(4457)$$ with spin parity assignments $$J^P=1/2^-$$, $$3/2^-$$ and $$1/2^-$$, 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.

Journal Articles

$$K^{ast 0}Sigma^+$$ photoproduction with evidence for the Kappa Meson Exchange at SPring-8/LEPS

Hwang, S. H.*; Hicks, K.*; Ahn, J. K.*; Nakano, Takashi*

Few-Body Systems, 54(7-10), p.1037 - 1041, 2013/08

 Times Cited Count:0 Percentile:0(Physics, Multidisciplinary)

Journal Articles

J-PARC E27 experiment to search for a nuclear Kaon bound state $$K^-pp$$

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

 Times Cited Count:10 Percentile:59.84(Physics, Multidisciplinary)

In the J-PARC E27 experiment, we search for a $$K^-pp$$ bound state via the $$d(pi^{+}, K^+)$$ reaction at 1.7 GeV/c at the K1.8 beam line. The binding energy and decay width of the $$K^-pp$$ bound state can be obtained in the missing mass measurement with a good energy resolution of 2 MeV/c$$^2$$. A range counter array (RCA) was constructed to detect the two high-momentum protons from the $$K^-pp$$ decay and to reduce the background such as quasi-free hyperon production. Recently, we have carried out a pilot run in June, 2012. The $$d(pi^{+}, K^+)$$ missing-mass spectrum has been obtained for the first time.

Journal Articles

Search for pentaquark $$Theta^+$$ in hadronic reaction at J-PARC

Naruki, Megumi*; Sugimura, Hitoshi; Imai, Kenichi; Ichikawa, Yudai; Hosomi, Kenji; 68 of others*

Few-Body Systems, 54(7-10), p.955 - 960, 2013/08

 Times Cited Count:2 Percentile:22.1(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Study of neutron-rich hypernuclei by the ($$pi^-,K^+$$) reaction at J-PARC

Sugimura, Hitoshi; Imai, Kenichi; 34 of others*

Few-Body Systems, 54(7-10), p.1235 - 1238, 2013/08

 Times Cited Count:0 Percentile:0(Physics, Multidisciplinary)

no abstracts in English

Journal Articles

Search for $$Theta^+$$ via the pion induced reaction at J-PARC; J-PARC E19

Shirotori, Kotaro

Few-Body Systems, 54(1-4), p.145 - 150, 2013/03

 Times Cited Count:0 Percentile:0(Physics, Multidisciplinary)

The $$Theta^+$$ pentaquark baryon was searched for via the $$pi^-prightarrow K^-X$$ reaction at J-PARC. $$pi^-$$ meson beams were irradiated on the liquid hydrogen target with the beam momentum of 1.92 GeV/$$c$$. In the missing mass spectrum, no peak structure corresponding to $$Theta^{+}$$ mass was observed. The preliminary upper limit of the differential cross section averaged over the scattering angle of 2$$^{circ}$$ to 15$$^{circ}$$ at the laboratory frame was less than 0.3 $$mu$$b/sr at the 90% confidence level in the missing mass region over 1.51 GeV/$$c^2$$ to 1.55 GeV/$$c^2$$.

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