J/Ψat high temperatures in anisotropic lattice QCD
| dc.creator | Iida, Hideaki | |
| dc.creator | Doi, Takumi | |
| dc.creator | Ishii, Noriyoshi | |
| dc.creator | Suganuma, Hideo | |
| dc.date | 2005-09-26 | |
| dc.date.accessioned | 2026-07-07T06:23:41Z | |
| dc.date.available | 2026-07-07T06:23:41Z | |
| dc.description | J/Ψand η_c above the QCD critical temperature T_c are studied in anisotropic quenched lattice QCD, considering whether the c\bar c systems above T_c are compact quasi-bound states or scattering states. We adopt the standard Wilson gauge action and O(a)-improved Wilson quark action with renormalized anisotropy a_s/a_t =4 at β=6.10 on 16^3\times (14-26) lattices, which correspond to the spatial lattice volume V\equiv L^3\simeq(1.55{\rm fm})^3 and temperatures T\simeq(1.11-2.07)T_c. To clarify whether compact charmonia survive in the deconfinement phase, we investigate spatial boundary-condition dependence of the energy of the c\bar c systems above T_c. In fact, for low-lying c \bar c scattering states, there appears a significant energy difference ΔE \equiv E{\rm (APBC)}-E{\rm (PBC)} between periodic and anti-periodic boundary conditions as ΔE\simeq2\sqrt{m_c^2+3π^2/L^2}-2m_c (m_c: charm quark mass) on the finite-volume lattice. In contrast, for compact charmonia, there is no significant energy difference between periodic and anti-periodic boundary conditions. As a lattice QCD result, we find almost no spatial boundary-condition dependence for the energy of the c\bar c system in J/Ψand η_c channels for T\simeq(1.11-2.07)T_c, which indicates that J/Ψand η_c would survive as compact c\bar c quasi-bound states below 2T_c. | |
| dc.description | 6 pages, 4 figures, talk given at the XXIII International Symposium on Lattice Field Theory, School of Mathematics, Trinity College, Dublin, Ireland, Monday 25th July to Saturday 30th July 2005 | |
| dc.identifier | https://arxiv.org/abs/hep-lat/0509129 | |
| dc.identifier | http://arxiv.org/abs/hep-lat/0509129 | |
| dc.identifier | PoS LAT2005 (2005) 184 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/96321 | |
| dc.subject | High Energy Physics - Lattice | |
| dc.title | J/Ψat high temperatures in anisotropic lattice QCD | |
| dc.type | text |