TY - JOUR
T1 - The tetraquark candidate Zc (3900) from dynamical lattice QCD simulations
AU - Ikeda, Yoichi
N1 - Funding Information:
The author thanks all the members of the HAL QCD Collaboration for discussions. The authors are also grateful to ILDG/JLDG [44] for providing us with the full QCD gauge configurations used in this study, and to Dr C Z Yuan for providing us with BESIII experimental data. Numerical calculations were carried out on NEC-SX9 at RCNP in Osaka University and SR16000 at YITP in Kyoto University. This study is supported in part by JSPS KAKENHI Grants Number JP17K14287, and by MEXT as Priority Issue on Post-K computer (Elucidation of the Fundamental Laws and Evolution of the Universe) and SPIRE (Strategic Program for Innovative REsearch).
Funding Information:
The author thanks all the members of the HAL QCD Collaboration for discussions. The authors are also grateful to ILDG/JLDG [44] for providing us with the full QCD gauge configurations used in this study, and to Dr C Z Yuan for providing us with BESIII experimental data. Numerical calculations were carried out on NEC-SX9 at RCNP in Osaka University and SR16000 at YITP in Kyoto University. This study is supported in part by JSPS KAKENHI Grants Number JP17K14287, and by MEXT as ‘Priority Issue on Post-K computer’ (Elucidation of the Fundamental Laws and Evolution of the Universe) and SPIRE (Strategic Program for Innovative REsearch).
Publisher Copyright:
© 2018 IOP Publishing Ltd Printed in the UK.
PY - 2018/2
Y1 - 2018/2
N2 - The structure of the tetraquark candidate Zc (3900), which has been experimentally reported in e+e- collisions, is studied by s-wave meson-meson coupled-channel scattering on the lattice. The s-wave interactions among the πJ/φ, ρηc and DD̄∗ channels are derived from (2 + 1)-flavor dynamical QCD simulations at mπ = 410-700MeV. It is found that the interactions are dominated by the off-diagonal πJ/φ-DD̄z.ast; and ρηc-DD̄z.ast; couplings. With the interactions obtained, the s-wave two-body amplitudes and the pole position in πJ/φ-ρηc-DD̄z.ast; coupled-channel scattering are calculated. The results show that Zc (3900) is not a conventional resonance but a threshold cusp. A semiphenomenological analysis with the coupled-channel interaction to the experimentally observed decay mode is also presented to confirm the conclusion.
AB - The structure of the tetraquark candidate Zc (3900), which has been experimentally reported in e+e- collisions, is studied by s-wave meson-meson coupled-channel scattering on the lattice. The s-wave interactions among the πJ/φ, ρηc and DD̄∗ channels are derived from (2 + 1)-flavor dynamical QCD simulations at mπ = 410-700MeV. It is found that the interactions are dominated by the off-diagonal πJ/φ-DD̄z.ast; and ρηc-DD̄z.ast; couplings. With the interactions obtained, the s-wave two-body amplitudes and the pole position in πJ/φ-ρηc-DD̄z.ast; coupled-channel scattering are calculated. The results show that Zc (3900) is not a conventional resonance but a threshold cusp. A semiphenomenological analysis with the coupled-channel interaction to the experimentally observed decay mode is also presented to confirm the conclusion.
UR - http://www.scopus.com/inward/record.url?scp=85040663995&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85040663995&partnerID=8YFLogxK
U2 - 10.1088/1361-6471/aa9afd
DO - 10.1088/1361-6471/aa9afd
M3 - Article
AN - SCOPUS:85040663995
VL - 45
JO - Journal of Physics G: Nuclear and Particle Physics
JF - Journal of Physics G: Nuclear and Particle Physics
SN - 0954-3899
IS - 2
M1 - 024002
ER -