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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
Times Cited Count:1 Percentile:0(Physics, Multidisciplinary)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.
Takeuchi, Sachiko*; Giachino, A.*; Takizawa, Makoto*; Santopinto, E.*; Oka, Makoto
Hadron Spectroscopy and Structure; Proceedings of the 18th International Conference (HADRON 2019), p.333 - 337, 2020/08
Pentaquarks with or heavy quarks are very much interesting. We analyze the strange pentaquark with or in the coupled-channel quark cluster model. We find bound, resonance and cusp like states.
Yamaguchi, Yasuhiro*; Hosaka, Atsushi; Takeuchi, Sachiko*; Takizawa, Makoto*
Journal of Physics G; Nuclear and Particle Physics, 47(5), p.053001_1 - 053001_67, 2020/05
Times Cited Count:43 Percentile:88.76(Physics, Nuclear)Yamaguchi, Yasuhiro; Garca-Tecocoatzi, H.*; Giachino, A.*; Hosaka, Atsushi; Santopinto, E.*; Takeuchi, Sachiko*; Takizawa, Makoto*
Physical Review D, 101(9), p.091502_1 - 091502_7, 2020/05
Times Cited Count:46 Percentile:95.34(Astronomy & Astrophysics)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.
Giachino, A.*; Hosaka, Atsushi; Santopinto, E.*; Takeuchi, Sachiko*; Takizawa, Makoto*; Yamaguchi, Yasuhiro*
Recent Progress in Few-Body Physics; Springer Proceedings in Physics, Vol.238, p.621 - 627, 2020/01
Times Cited Count:3 Percentile:94.26(Quantum Science & Technology)Yamaguchi, Yasuhiro*; Giachino, A.*; Hosaka, Atsushi; Santopinto, E.*; Takeuchi, Sachiko*; Takizawa, Makoto*
Physical Review D, 96(11), p.114031_1 - 114031_25, 2017/12
Times Cited Count:52 Percentile:91.2(Astronomy & Astrophysics)Mizuhashi, Kiyoshi; Takizawa, Haruki; Hosono, Masakazu; Nakamura, Yoshiteru*; Kaneya, Satoshi*; Mochizuki, Seigo*; Asai, Takahiro*; Kawabata, Michiko*; Daikubara, Kazuko*
JAEA-Review 2012-046, JAEA Takasaki Annual Report 2011, P. 171, 2013/01
Fiscal year 2011 was significantly influenced by the East Japan Great Earthquake (March 11, 2011). The operation of the TIARA facility which was being planned from April started from the middle of May. Lost beam-time of the experiment due to the great earthquake was compensated with operations on Saturday biweekly. And it was obliged to re-examine the operation plan during the period of electric power reduction in July, August, and September. The demanded reduction rate of electric power in daytime for summer season was 15% as compared with 2010. The limited value in daytime was 3,600 kW. Therefore, the experiment in daytime was conducted with light ions (H, D with 20 MeV) only by the AVF Cyclotron. As mentioned above, the electric power in the daytime of summer did not exceed 3,200 kW. Moreover, the beam time as an ordinary year was secured.
Yamaguchi, Yasuhiro; Hosaka, Atsushi; Takeuchi, Sachiko*; Takizawa, Makoto*
no journal, ,
We study the pentaquarks that were reported by LHCb collaboration in 2019. We employ the hadronic molecular model where the one pion exchange potential is introduced as the long-range hadron interaction. As for the short-range interaction, we introduce coupling to the five-quark states in the hadronic molecule. By solving the Schrodinger equation by using the variational method and the complex scaling method, we obtain the energies and decay widths. We also discuss the role of the tensor force and the short-range interaction.
Yamaguchi, Yasuhiro; Hosaka, Atsushi; Takeuchi, Sachiko*; Takizawa, Makoto*
no journal, ,
Recently, the exotic hadrons considered to be a pentaquark have been reported in the LHCb experiments. In this talk, we study the states as the hadronic molecule of a heavy meson and heavy baryon, where the pseudoscalar-meson exchange potential and the coupling to the compact five-quark states are introduced. We compute an energy and a decay width, and discuss a role of the interactions introduced.
Yamaguchi, Yasuhiro; Takeuchi, Sachiko*; Takizawa, Makoto*; Hosaka, Atsushi
no journal, ,
has been known as a candidate of the exotic hadron, while the nature has not been understood yet. The mass spectrum of , near the threshold, indicates the composite structure, so called a hadronic molecule. On the other hand, measurements of the production ratio prefer the compact structure. To understand the nature of , we employ the hybrid model with the charmonium and hadronic molecular components, and study a mass spectrum and decay properties. The model reasonably reproduces the spectrum, where the coupling plays an important role. We also introduce the and molecular components and find that the finite width of and is important to explain the pole position appearing above the threshold.