Lattice QCD signal for a bottom-bottom tetraquark

Lattice QCD signal for a bottom-bottom tetraquark

Utilizing lattice QCD results for the potential of two static antiquarks and two dynamical quarks as well as quark model techniques for the dynamics of two heavy antiquarks in a cloud of two light quarks, we are provided with an accurate framework for the study of possibly existing heavy-heavylight-light tetraquarks. Among the possible quantum numbers of such a system, we find binding in only o...

Charmed bottom baryon spectroscopy from lattice QCD

Zachary S. Brown, William Detmold, Stefan Meinel, and Kostas Orginos Department of Physics, College of William and Mary, Williamsburg, Virginia 23187, USA Thomas Jefferson National Accelerator Facility, Newport News, Virginia 23606, USA Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA Department of Physics, University of Arizona, Tucson,...

Lattice 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 ...

Excited-state spectroscopy of triply-bottom baryons from lattice QCD

The spectrum of baryons containing three b quarks is calculated in nonperturbative QCD, using the lattice regularization. The energies of ten excited bbb states with J = 1 2 + , 3 2 + , 5 2 + , 7 2 + , 1 2 − , and 3 2 − are determined with high precision. A domain-wall action is used for the up-, downand strange quarks, and the bottom quarks are implemented with NRQCD. The computations are done...

QCD Plasma Instabilities and Bottom-Up Thermalization