scholarly journals PRESENT CONSTRAINTS ON THE H-DIBARYON AT THE PHYSICAL POINT FROM LATTICE QCD

2011 ◽  
Vol 26 (34) ◽  
pp. 2587-2595 ◽  
Author(s):  
◽  
S. R. BEANE ◽  
E. CHANG ◽  
W. DETMOLD ◽  
B. JOÓ ◽  
...  
Keyword(s):  
Binding Energy ◽  
Lattice Qcd ◽  
Lattice Spacing ◽  
Pion Mass ◽  
Physical Point ◽  
Physical Pion ◽  
Scattering State ◽  
H Dibaryon ◽  
Near Threshold

The current constraints from lattice QCD on the existence of the H-dibaryon are discussed. With only two significant lattice QCD calculations of the H-dibaryon binding energy at approximately the same lattice spacing, the forms of the chiral and continuum extrapolations to the physical point are not determined. In this brief report, we consider the constraints on the H-dibaryon imposed by two simple chiral extrapolations. In both instances, the extrapolation to the physical pion mass allows for a bound H-dibaryon or a near-threshold scattering state. Further lattice QCD calculations are required to clarify this situation.

scholarly journals Heavy light tetraquarks from Lattice QCD

2018 ◽  
Vol 175 ◽  
pp. 05014 ◽  
Author(s):  
Parikshit Junnarkar ◽  
M Padmanath ◽  
Nilmani Mathur
Keyword(s):  
Lattice Qcd ◽  
Lattice Spacing ◽  
Energy Levels ◽  
Clear Indication ◽  
Lattice Calculation ◽  
Charm Quarks ◽  
Preliminary Results ◽  
Scattering State

We present preliminary results from a lattice calculation of tetraquark states in the charm and bottom sector of the type udbb, usbb, udcc and scbb. These calculations are performed on Nf = 2 + 1 + 1 MILC ensembles with lattice spacing of a = 0:12 fm and a = 0:06 fm. A relativistic action with overlap fermions is employed for the light and charm quarks while a non-relativistic action with non-perturbatively improved coefficients is used in the bottom sector. Preliminary results provide a clear indication of presence of energy levels below the relevant thresholds of different tetraquark states in the double bottom sector while a scattering state is observed in the charm sector.

scholarly journals Nucleon structure from Lattice QCD using a nearly physical pion mass

2014 ◽  
Vol 734 ◽  
pp. 290-295 ◽  
Author(s):  
J.R. Green ◽  
M. Engelhardt ◽  
S. Krieg ◽  
J.W. Negele ◽  
A.V. Pochinsky ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Nucleon Structure ◽  
Physical Pion

scholarly journals Lattice QCD study of the rare kaon decay K+→π+νν¯ at a near-physical pion mass

2019 ◽  
Vol 100 (11) ◽  
Author(s):  
Norman H. Christ ◽  
Xu Feng ◽  
Antonin Portelli ◽  
Christopher T. Sachrajda ◽  
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Kaon Decay ◽  
Physical Pion

scholarly journals Complete flavor decomposition of the spin and momentum fraction of the proton using lattice QCD simulations at physical pion mass

2020 ◽  
Vol 101 (9) ◽  
Author(s):  
C. Alexandrou ◽  
S. Bacchio ◽  
M. Constantinou ◽  
J. Finkenrath ◽  
K. Hadjiyiannakou ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Momentum Fraction ◽  
Physical Pion

scholarly journals Nonperturbatively renormalized glue momentum fraction at the physical pion mass from lattice QCD

2018 ◽  
Vol 98 (7) ◽  
Author(s):  
Yi-Bo Yang ◽  
Ming Gong ◽  
Jian Liang ◽  
Huey-Wen Lin ◽  
Keh-Fei Liu ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Momentum Fraction ◽  
Physical Pion

scholarly journals Nucleon electromagnetic form factors from lattice QCD using a nearly physical pion mass

2014 ◽  
Vol 90 (7) ◽  
Author(s):  
J. R. Green ◽  
J. W. Negele ◽  
A. V. Pochinsky ◽  
S. N. Syritsyn ◽  
M. Engelhardt ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Form Factors ◽  
Electromagnetic Form Factors ◽  
Physical Pion

scholarly journals The ρ-resonance from N = 2 lattice QCD including the physical pion mass

2021 ◽  
pp. 136449
Author(s):  
Matthias Fischer ◽  
Bartosz Kostrzewa ◽  
Maxim Mai ◽  
Marcus Petschlies ◽  
Ferenc Pittler ◽  
...  
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Physical Pion

HYPERON-NUCLEON FORCES CALCULATED FROM LATTICE QCD

2009 ◽  
Vol 24 (11) ◽  
pp. 2110-2117
Author(s):  
H. NEMURA ◽  
N. ISHII ◽  
S. AOKI ◽  
T. HATSUDA
Keyword(s):  
Numerical Calculation ◽  
Lattice Qcd ◽  
Quark Mass ◽  
Lattice Spacing ◽  
Finite Lattice ◽  
Temporal Part ◽  
Lattice Volume ◽  
Scattering State ◽  
Spatial Lattice ◽  
Scattering Lengths

We study the hyperon-nucleon (YN) forces by using quenched lattice QCD. The Bethe-Salpeter amplitudes are calculated for the lowest scattering state of the systems so as to obtain the YN potentials. The numerical calculation is twofold: (i) The pΞ0 potentials and scattering lengths are obtained by using lattice QCD with β = 5.7, the lattice spacing of a = 0.1416(9) fm , on the 323 × 32 lattice. Two kinds of ud quark mass are used, corresponding to mπ ≃ 0.37 GeV and 0.51 GeV. The spatial lattice volume is (4.5 fm)3. The scattering lengths obtained from Lüscher's formula show that the pΞ0 interactions are both attractive at 1S0 and 3S1 channels, and the interaction in the 3S1 is more attractive than in the 1S0. These attractive forces become stronger as the u, d quark mass decreases. (ii) The pΛ potentials are calculated. The lattice setup is almost same as the former calculation except for the temporal part. The calculation is performed on 323 × 48 lattice. Two kinds of ud quark mass are used, corresponding to mπ ≃ 0.47 GeV and 0.51 GeV. The lowest scattering energies in the finite lattice volume are calculated.

scholarly journals Pion structure from twisted mass lattice QCD down to the physical pion mass

2017 ◽  
Author(s):  
Bartosz Kostrzewa ◽  
Maximilian Oehm ◽  
Francesco Sanfilippo ◽  
Silvano Simula ◽  
Carsten Urbach
Keyword(s):  
Lattice Qcd ◽  
Pion Mass ◽  
Physical Pion ◽  
Twisted Mass ◽  
Pion Structure
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