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He
reaction for the 
bound-state search in the J-PARC E15 experimentSekihara, Takayasu; Oset, E.*; Ramos, A.*
JPS Conference Proceedings (Internet), 26, p.023009_1 - 023009_4, 2019/11
molecular state as a "
pentaquark" in a three-body calculationYamagata-Sekihara, Junko*; Sekihara, Takayasu
Physical Review C, 100(1), p.015203_1 - 015203_12, 2019/07
Times Cited Count：2 Percentile：23.19(Physics, Nuclear)
interaction; Meson exchanges, inelastic channels, and quasibound stateSekihara, Takayasu; Kamiya, Yuki*; Hyodo, Tetsuo*
Physical Review C, 98(1), p.015205_1 - 015205_20, 2018/07
Times Cited Count：22 Percentile：86.47(Physics, Nuclear)
bound state and its 
-channel formation in the 
reactionSekihara, Takayasu; Fujioka, Hiroyuki*; Ishikawa, Takatsugu*
Physical Review C, 97(4), p.045202_1 - 045202_9, 2018/04
Times Cited Count：4 Percentile：36.29(Physics, Nuclear)
He 
reaction for the bound-state search in the J-PARC E15 experimentSekihara, Takayasu; Oset, E.*; Ramos, A.*
Proceedings of Science (Internet), 310, p.199_1 - 199_5, 2018/03
invariant-mass spectrum in the 
reaction?Sekihara, Takayasu; Oset, E.*; Ramos, A.*
Acta Physica Polonica B, 48(10), p.1869 - 1874, 2017/10
Times Cited Count：1 Percentile：12.03(Physics, Multidisciplinary)Cho, S.*; Hyodo, Tetsuo*; Jido, Daisuke*; Ko, C. M.*; Lee, S. H.*; Maeda, Saori*; Miyahara, Kenta*; Morita, Kenji*; Nielsen, M.*; Onishi, Akira*; et al.
Progress in Particle and Nuclear Physics, 95, p.279 - 322, 2017/07
Times Cited Count：93 Percentile：89.92(Physics, Nuclear)With upgraded detectors at the Relativistic Heavy Ion Collider (RHIC) and the Large Hadron Collider (LHC), it has become possible to measure hadrons beyond their ground states in high energy heavy ion collisions. Therefore, heavy ion collisions provide a new method for studying exotic hadrons that are either molecular states made of various hadrons or compact system consisting of muliquarks. Because their structures are related to the fundamental properties of Quantum Chromodynamics (QCD), studying exotic hadrons is currently one of the most active areas of research in hadron physics. The present review is a summary of the current understanding of a selected set of exotic candidate particles that can be potentially measured in heavy ion collisions.
Sekihara, Takayasu; Hyodo, Tetsuo*; Jido, Daisuke*; Yamagata-Sekihara, Junko*; Yasui, Shigehiro*
Proceedings of Science (Internet), 281, p.289_1 - 289_8, 2017/05
He
reaction around the ThresholdSekihara, Takayasu; Oset, E.*; Ramos, A.*
JPS Conference Proceedings (Internet), 13, p.020002_1 - 020002_5, 2017/02
Sekihara, Takayasu
Physical Review C, 95(2), p.025206_1 - 025206_16, 2017/02
Times Cited Count：21 Percentile：83.48(Physics, Nuclear)He(
reaction at J-PARCSekihara, Takayasu; Oset, E.*; Ramos, A.*
Progress of Theoretical and Experimental Physics (Internet), 2016(12), p.123D03_1 - 123D03_27, 2016/12
Times Cited Count：37 Percentile：85.97(Physics, Multidisciplinary)
bound state on a deuteron target with forward proton emissionSekihara, Takayasu; Sakai, Shuntaro*; Jido, Daisuke*
Physical Review C, 94(2), p.025203_1 - 025203_11, 2016/08
Times Cited Count：4 Percentile：33.5(Physics, Nuclear) bound state on deuteron target with forward proton emissionSekihara, Takayasu; Sakai, Shuntaro*; Jido, Daisuke*
no journal, ,
Sekihara, Takayasu
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He
reaction at J-PARCSekihara, Takayasu; Oset, E.*; Ramos, A.*
no journal, ,
Sekihara, Takayasu
no journal, ,
In this contribution, I introduce the physical meaning of the compositeness, its expression, and theoretical evaluation in effective models. In particular, we show that the two-body wave function of the bound state corresponds to the residue of the scattering amplitude at the bound state pole, which means that solving the Lippmann-Schwinger equation at the bound state pole is equivalent to evaluating the two-body wave function of the bound state. Then, we evaluate the compositeness for the so-called dynamically generated resonances in the chiral unitary approach, such as 
, 
, and 
, and investigate their internal structure in terms of the hadronic molecular components.
Sekihara, Takayasu
no journal, ,
From the scattering amplitude we can extract automatically normalized two-body wave functions for general bound states. Thanks to this fact, we can discuss the internal structure of hadronic molecule candidates in terms of their two-body wave functions from scattering amplitudes.
He( reaction at J-PARCSekihara, Takayasu; Oset, E.*; Ramos, A.*
no journal, ,
and 
resonances from the 
scattering amplitudeSekihara, Takayasu
no journal, ,
The meson-baryon components for the and resonances can be investigated in terms of the compositeness, which is defined as the norm of the two-body wave function from the meson-baryon scattering amplitudes. For this purpose I first show that one can calculate the two-body wave function from the scattering amplitudes (not by the Schrodinger equation) by considering several schematic models. Then I explain my plan to evaluate / compositeness from the scattering amplitudes, which has been determined precisely in the partial wave analyses.
He( reaction at J-PARCSekihara, Takayasu; Oset, E.*; Ramos, A.*
no journal, ,
