Compact Exotic Tetraquark Mesons in Large-Nc QCD
نویسندگان
چکیده
منابع مشابه
Mesons at large Nc from lattice QCD
We calculate the pion and ρ meson masses in quenched SU(N) gauge theories for N = 2, 3, 4 and 6. Extrapolating these results to the chiral and large-N limits, we find mρ = (1.670± 0.024) √ σ = (741± 11) MeV for the ρ meson mass at a fixed lattice spacing a ≈ 0.093 fm. We estimate a continuum value, mρ = (786 ± 22) MeV, where we use the value σ = 1 GeV/fm ≈ (444 MeV) for the string tension. We f...
متن کاملLattice QCD Evidence for Exotic Tetraquark Resonance
We study the manifestly exotic tetraquark D s0 cus̄d̄ and the scalar tetraquark f0 udūd̄ in SU(3)c anisotropic quenched lattice QCD. We adopt the O a -improved Wilson (clover) fermion at β 5 75 on 123 96 with renormalized anisotropy as at 4, and investigate the correlator of the four-quark (4Q) system, cus̄d̄, with various quark masses including the idealized SU(4) f case. For f0 udūd̄ etc., we only ...
متن کاملTetraquark mesons in large-N quantum chromodynamics.
It is argued that exotic mesons consisting of two quarks and two antiquarks are not ruled out in quantum chromodynamics with a large number N of colors, as generally thought. Tetraquarks of one class are typically long-lived, with decay rates proportional to 1/N.
متن کاملExotic mesons in quenched lattice QCD
Claude Bernard and James E. Hetrick Department of Physics, Washington University, St. Louis, MO 63130, USA Thomas A. DeGrand and Matthew Wingate Physics Department, University of Colorado, Boulder, CO 80309, USA Carleton DeTar and Craig McNeile Physics Department, University of Utah, Salt Lake City, UT 84112, USA and Zentrum für Interdisziplinäre Forschung, Universität Bielefeld, Bielefeld, Ger...
متن کاملExotic Mesons in Quenched Lattice Qcd 1
Since gluons in QCD are interacting fundamental constituents just as quarks are, we expect that in addition to mesons made from a quark and an antiquark, there should also be glueballs and hybrids (bound states of quarks, antiquarks and gluons). In general, these states would mix strongly with the conventional qq mesons. However, 1 Submitted to Physical Review D. they can also have exotic quant...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: EPJ Web of Conferences
سال: 2018
ISSN: 2100-014X
DOI: 10.1051/epjconf/201819104003