TY - JOUR
T1 - Charmed tetraquarks Tcc and Tcs from dynamical lattice QCD simulations
AU - Ikeda, Yoichi
AU - Charron, Bruno
AU - Aoki, Sinya
AU - Doi, Takumi
AU - Hatsuda, Tetsuo
AU - Inoue, Takashi
AU - Ishii, Noriyoshi
AU - Murano, Keiko
AU - Nemura, Hidekatsu
AU - Sasaki, Kenji
N1 - Funding Information:
The authors thank T. Hyodo, T. Matsuki, M. Oka, S. Takeuchi, M. Takizawa and S. Yasui for fruitful discussions, and authors and maintainer of CPS++ [31] , whose modified version is used in this Letter. We also thank ILDG/JLDG [32] for providing us with full QCD gauge configurations used in this study. Numerical calculations were carried out on NEC-SX9 and SX8R at Osaka University and SR16000 at YITP in Kyoto University. This project is supported in part by Grant-in-Aid for Scientific Research on Innovative Areas (No. 2004:20105001 , 20105003 ) and for Scientific Research (Nos. 25800170 , 25287046 , 24740146 , 24540273 , 23540321 ) and SPIRE (Strategic Program for Innovative Research) . T.H. was partially supported by RIKEN iTHES project.
Publisher Copyright:
© 2014 The Authors.
PY - 2014/2/5
Y1 - 2014/2/5
N2 - Charmed tetraquarks Tcc=(ccu-d-) and Tcs=(csu-d-) are studied through the S-wave meson-meson interactions, D-D, K--D, D-D* and K--D*, on the basis of the (2+1)-flavor lattice QCD simulations with the pion mass mπ≃410, 570 and 700 MeV. For the charm quark, the relativistic heavy quark action is employed to treat its dynamics on the lattice. Using the HAL QCD method, we extract the S-wave potentials in lattice QCD simulations, from which the meson-meson scattering phase shifts are calculated. The phase shifts in the isospin triplet (I=1) channels indicate repulsive interactions, while those in the I=0 channels suggest attraction, growing as mπ decreases. This is particularly prominent in the Tcc(JP=1+, I=0) channel, though neither bound state nor resonance are found in the range mπ=410-700 MeV. We make a qualitative comparison of our results with the phenomenological diquark picture.
AB - Charmed tetraquarks Tcc=(ccu-d-) and Tcs=(csu-d-) are studied through the S-wave meson-meson interactions, D-D, K--D, D-D* and K--D*, on the basis of the (2+1)-flavor lattice QCD simulations with the pion mass mπ≃410, 570 and 700 MeV. For the charm quark, the relativistic heavy quark action is employed to treat its dynamics on the lattice. Using the HAL QCD method, we extract the S-wave potentials in lattice QCD simulations, from which the meson-meson scattering phase shifts are calculated. The phase shifts in the isospin triplet (I=1) channels indicate repulsive interactions, while those in the I=0 channels suggest attraction, growing as mπ decreases. This is particularly prominent in the Tcc(JP=1+, I=0) channel, though neither bound state nor resonance are found in the range mπ=410-700 MeV. We make a qualitative comparison of our results with the phenomenological diquark picture.
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U2 - 10.1016/j.physletb.2014.01.002
DO - 10.1016/j.physletb.2014.01.002
M3 - Article
AN - SCOPUS:84908388424
SN - 0370-2693
VL - 729
SP - 85
EP - 90
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
ER -