The glueball-to-vacuum matrix elements of local gluonic operators in scalar, tensor, and pseudoscalar channels are investigated numerically on several anisotropic lattices with the spatial lattice spacing ranging from 0.1--0.2 fm. These needed to predict glueball branching ratios $J/\ensuremath{\psi}$ radiative decays which will help identify states experiments. Two types improved constructed for a self-consistent check finite-volume effects studied. We find that dependence our results is...

We present the results of a lattice calculation tetraquark states with quark contents ${q}_{1}{q}_{2}\overline{Q}\overline{Q},{q}_{1},{q}_{2}\ensuremath{\subset}u,d,s,c$ and $Q\ensuremath{\equiv}b$, $c$ in both spin-0 ($J=0$) spin-1 ($J=1$) sectors. This is performed on three dynamical ${N}_{f}=2+1+1$ highly improved staggered ensembles at spacings about 0.12, 0.09, 0.06 fm. use overlap action for light to charm quarks, while nonrelativistic nonperturbatively coefficients terms up...

We present the first light-hadron spectroscopy on a set of ${N}_{f}=2+1$ dynamical, anisotropic lattices. A convenient coordinates that parameterize two-dimensional plane light and strange-quark masses is introduced. These are used to extrapolate data obtained at simulated values quark physical point. measurement Sommer scale these ensembles made, performance hybrid Monte Carlo algorithm for generating estimated.

Working with a large basis of covariant derivative-based meson interpolating fields we demonstrate the feasibility reliably extracting multiple excited states using variational method. The study is performed on quenched anisotropic lattices clover quarks at charm mass. We how knowledge continuum limit lattice field can give additional spin-assignment information, even single spacing, via overlap factors and state. Excited state masses are systematically high respect to quark-potential model...

Excited state spectra are calculated using lattice QCD for baryons that can be formed from $u$, $d$ and $s$ quarks, namely the $N$, $\Delta$, $\Lambda$, $\Sigma$, $\Xi$ $\Omega$ families of baryons. Baryonic operators constructed continuum transform as irreducible representations SU(3)$_F$ symmetry flavor, SU(4) Dirac spins quarks O(3) orbital angular momenta. Covariant derivatives used to realize Using operators, we calculate matrices correlation functions in order extract excited states....

We present the ground and excited state spectra of ${\mathrm{\ensuremath{\Omega}}}_{c}^{0}$ baryons with spin up to $7/2$ from lattice quantum chromodynamics dynamical quark fields. Based on our results, we predict numbers five baryons, which have recently been observed by LHCb Collaboration. Our results strongly indicate that states ${\mathrm{\ensuremath{\Omega}}}_{c}(3000{)}^{0}$ ${\mathrm{\ensuremath{\Omega}}}_{c}(3050{)}^{0}$ spin-parity ${J}^{P}=1/{2}^{\ensuremath{-}}$,...

We report the ground state masses of hadrons containing at least one charm and bottom quark using lattice quantum chromodynamics. These include mesons with spin (J)-parity (P) numbers J(P): 0(-), 1(-), 1(+) 0(+) spin-1/2 3/2 baryons. Among these only 0(-) is known experimentally therefore our predictions provide important information for experimental discovery all other contents.

We report a lattice QCD study of the heavy-light meson-meson interactions with an explicitly exotic flavor content <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>b</a:mi><a:mi>c</a:mi><a:mover accent="true"><a:mi>u</a:mi><a:mo stretchy="false">¯</a:mo></a:mover><a:mover accent="true"><a:mi>d</a:mi><a:mo stretchy="false">¯</a:mo></a:mover></a:math>, isospin <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"...

The mass spectrum of charmed and bottom baryons has been computed on anisotropic lattices using quenched lattice nonrelativistic QCD. Masses are extracted by splittings which more accurate than masses obtained directly the mass-energy relation. Of particular interest between spin-1/2 spin-3/2 heavy baryons, we find that these color hyperfine effects not suppressed in baryon sector although they known to be meson sector. Results compared with those a previous NRQCD calculation from...

We investigate whether the lightest scalar mesons $\ensuremath{\sigma}$ and $\ensuremath{\kappa}$ have a large tetraquark component $\overline{q}\overline{q}qq$, as is strongly supported by many phenomenological studies. A search for possible light states with ${J}^{\mathrm{PC}}={0}^{++}$ $I=0,2,1/2,3/2$ on lattice presented. perform two-flavor dynamical simulation chirally improved quarks quenched overlap quarks, finding qualitative agreement between both results. The spectrum determined...

We present the ground and excited state spectra of doubly charmed baryons from lattice QCD with dynamical quark fields. Calculations are performed on anisotropic lattices size $1{6}^{3}\ifmmode\times\else\texttimes\fi{}128$, inverse spacing in temporal direction ${a}_{t}^{\ensuremath{-}1}=5.67(4)\text{ }\mathrm{GeV}$ a pion mass about 390 MeV. A large set baryonic operators that respect symmetries yet which retain memory their continuum analogues used. These transform as irreducible...

We report a complete calculation of the quark and glue momenta angular in proton. These include contributions from both connected disconnected insertions. The insertion loops are computed with $Z_4$ noise, signal-to-noise is improved unbiased subtractions. operator comprised gauge-field tensors constructed overlap operator. carried out on $16^3 \times 24$ quenched lattice at $\beta = 6.0$ for Wilson fermions $\kappa=0.154, 0.155$, $0.1555$ which correspond to pion masses $650, 538$,...

The spectrum of excitations triply-charmed baryons is computed using lattice QCD including dynamical light quark fields. Calculations are performed on anisotropic lattices with temporal and spatial spacings a_t = 0.0351(2) a_s ~ 0.12 fm respectively pion mass about 390 MeV. obtained has baryonic states well-defined total spin up to 7/2 the low-lying closely resemble expectation from models an SU(6)X O(3) symmetry. Energy splittings between extracted states, those due spin-orbit coupling in...

We report the first lattice QCD study of heavy dibaryons in which all six quarks have bottom (beauty) flavor. Performing a state-of-the-art calculation we find clear evidence for deeply bound Ω_{bbb}-Ω_{bbb} dibaryon ^{1}S_{0} channel, as pole singularity S-wave scattering amplitude with binding energy -81( _{-16}^{+14}) MeV. With such deep binding, Coulomb repulsion serves only perturbation on ground state wave function parametrized strong potential and may shift by few percent. Considering...

We present a lattice QCD study of the elastic <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>S</a:mi></a:math>-wave <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:mi>D</c:mi><c:mover accent="true"><c:mi>B</c:mi><c:mo stretchy="false">¯</c:mo></c:mover></c:math> scattering in search tetraquark candidates with explicitly exotic flavor content <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"...

Masses of singly and doubly charmed baryons are calculated in quenched lattice QCD using an improved action the D234 type on anisotropic lattice. The mass differences between spin 3/2 1/2 baryon states compared to vector pseudoscalar mesons. suppression splittings mesons containing heavy quarks, characteristic simulations, is not observed sector. dependence color hyperfine effects discussed within context quark model effective theory.

We study the ${a}_{0}$ and $\ensuremath{\sigma}$ mesons with overlap fermion in chiral regime pion mass as low 182 MeV quenched approximation. After ${\ensuremath{\eta}}^{\ensuremath{'}}\ensuremath{\pi}$ ghost states are separated, we find $q\overline{q}$ interpolation field to be almost independent of quark region below strange mass. The chirally extrapolated results consistent ${a}_{0}(1450)$ being $u\overline{d}$ meson ${K}_{0}^{*}(1430)$ $u\overline{s}$ calculated masses at...

Highly excited states for isospin $\frac{1}{2}$ baryons are calculated the first time using lattice QCD with two flavors of dynamical quarks. Anisotropic lattices used pion masses, ${m}_{\ensuremath{\pi}}=416(36)\text{ }\text{ }\mathrm{MeV}$ and 578(29) MeV. The lowest four energies reported in each six irreducible representations octahedral group at mass. have dimensions ${24}^{3}\ifmmode\times\else\texttimes\fi{}64$, spatial spacing ${a}_{s}\ensuremath{\approx}0.11\text{ }\mathrm{fm}$,...

The overlap fermion propagator is calculated on 2+1 flavor domain wall gauge configurations 16^3 x 32, 24^3 64 and 32^3 lattices. With HYP smearing low eigenmode deflation, it shown that the inversion of operator can be expedited by ~ 20 times for 32 lattice 80 lattice. Through study hyperfine splitting, we found O(m^2a^2) error small these dynamical lattices adequately accommodate quark mass up to charm quark. energy constant \Delta_{mix} which characterizes discretization pion made a pair...

We report the first lattice quantum chromodynamics (QCD) study of deuteron($np$)-like dibaryons with heavy quark flavours. These include particles following dibaryon structures and valence contents: $\Sigma_c\Xi_{cc} (uucucc)$, $\Omega_c\Omega_{cc} (sscscc)$, $\Sigma_b\Xi_{bb} (uububb)$, $\Omega_b\Omega_{bb} (ssbsbb)$ $\Omega_{ccb}\Omega_{cbb} (ccbcbb)$, spin ($J$)-parity ($P$), $J^{P} \equiv 1^{+}$. Using a state-of-the art QCD calculation, after controlling relevant systematic errors, we...

We present a quenched lattice QCD calculation of spin-$1/2$ five-quark states with $uudd\overline{s}$ quark content for both positive and negative parities. do not observe any bound pentaquark state in these channels either $I=0$ or $I=1$. The we found are consistent $KN$ scattering which checked to exhibit the expected volume dependence spectral weight. results based on overlap-fermion propagators two lattices, ${12}^{3}\ifmmode\times\else\texttimes\fi{}28$...

While sign-coherent 4-dimensional structures cannot dominate topological charge fluctuations in the QCD vacuum at all scales due to reflection positivity, it is possible that enhanced coherence exists over extended space-time regions of lower dimension. Using overlap Dirac operator calculate density, we present evidence for such structure pure-glue SU(3) lattice gauge theory. It found a typical equilibrium configuration dominated by two oppositely charged connected (``sheets'') covering...

We present the N_f=2+1 clover fermion lattice QCD calculation of nucleon strangeness form factors. evaluate disconnected insertions using Z(4) stochastic method, along with unbiased subtractions from hopping parameter expansion. find that increasing number sources for each configuration improves signal significantly. obtain G_M^s(0) = -0.017(25)(07), where first error is statistical, and second uncertainties in Q^2 chiral extrapolations. This consistent experimental values, has an order...

We present the energy spectra of low-lying doubly charmed baryons using lattice quantum chromodynamics. precisely predict ground state mass charmed-strange ${\mathrm{\ensuremath{\Omega}}}_{cc}(1/{2}^{+})$ baryon to be 3712(11)(12) MeV which could well next discovered at LHCb experiment CERN. also masses other strange with numbers $3/{2}^{+}$, $1/{2}^{\ensuremath{-}}$, and $3/{2}^{\ensuremath{-}}$.