scholarly journals Stringy excitation and role of IR/UV gluons in lattice QCD

2012 ◽  
Author(s):  
Hiroshi Ueda ◽  
Takahiro M Doi ◽  
Sho Fujibayashi ◽  
Shoichiro Tsutsui ◽  
Takumi Iritani ◽  
...  
Keyword(s):  
Lattice Qcd

scholarly journals van der Waals Interactions and Hadron Resonance Gas: Role of resonance widths modeling on conserved charges fluctuations

2018 ◽  
Vol 171 ◽  
pp. 14006
Author(s):  
Volodymyr Vovchenko ◽  
Paolo Alba ◽  
Mark I. Gorenstein ◽  
Horst Stoecker
Keyword(s):  
Lattice Qcd ◽  
Temperature Region ◽  
Van Der Waals ◽  
Baryon Number ◽  
The Other ◽  
Van Der Waals Interactions ◽  
Crossover Temperature ◽  
Lattice Data ◽  
The Ideal

The quantum van der Waals (QvdW) extension of the ideal hadron resonance gas (HRG) model which includes the attractive and repulsive interactions between baryons – the QvdW-HRG model – is applied to study the behavior of the baryon number related susceptibilities in the crossover temperature region. Inclusion of the QvdW interactions leads to a qualitatively different behavior of susceptibilities, in many cases resembling lattice QCD simulations. It is shown that for some observables, in particular for χBQ11/χB2, effects of the QvdW interactions essentially cancel out. It is found that the inclusion of the finite resonance widths leads to an improved description of χB2, but it also leads to a worse description of χBQ11/χB2, as compared to the lattice data. On the other hand, inclusion of the extra, unconfirmed baryons into the hadron list leads to a simultaneous improvement in the description of both observables.

scholarly journals Lattice QCD study for stringy excitation and role of IR/UV gluons

2013 ◽  
Author(s):  
Hiroshi Ueda ◽  
Takahiro M Doi ◽  
Sho Fujibayashi ◽  
Shoichiro Tsutsui ◽  
Takumi Iritani ◽  
...  
Keyword(s):  
Lattice Qcd

scholarly journals The possibility of twin star solutions in a model based on lattice QCD thermodynamics

2021 ◽  
Vol 81 (1) ◽  
Author(s):  
P. Jakobus ◽  
A. Motornenko ◽  
R. O. Gomes ◽  
J. Steinheimer ◽  
H. Stoecker
Keyword(s):  
Neutron Stars ◽  
Lattice Qcd ◽  
Model Equation ◽  
Compact Stars ◽  
Model Parameters ◽  
Bag Model ◽  
First Order ◽  
Stellar Masses ◽  
First Order Phase

AbstractThe properties of compact stars and in particular the existence of twin star solutions are investigated within an effective model that is constrained by lattice QCD thermodynamics. The model is modified at large baryon densities to incorporate a large variety of scenarios of first order phase transitions to a phase of deconfined quarks. This is achieved by matching two different variants of the bag model equation of state, in order to estimate the role of the Bag model parameters on the appearance of a second family of neutron stars. The produced sequences of neutron stars are compared with modern constrains on stellar masses, radii, and tidal deformability from astrophysical observations and gravitational wave analyses. It is found that those scenarios in our analysis, in which a third family of stars appeared due to the deconfinement transition, are disfavored from astrophysical constraints.

scholarly journals Role of the double pole in lattice QCD with mixed actions

2005 ◽  
Vol 71 (11) ◽  
Author(s):  
Maarten Golterman ◽  
Taku Izubuchi ◽  
Yigal Shamir
Keyword(s):  
Lattice Qcd ◽  
Double Pole

HADRON SPIN PHYSICS — A THEORY UPDATE

2005 ◽  
Vol 20 (19) ◽  
pp. 4419-4424
Author(s):  
ANDREAS SCHÄFER
Keyword(s):  
Lattice Qcd ◽  
Short Description ◽  
Spin Physics ◽  
Parton Distributions ◽  
Generalized Parton Distributions ◽  
Recent Developments

I give a short description of some recent developments in hadron spin physics focussing on the concept of Generalized Parton Distributions and the role of lattice-QCD-calculations.

scholarly journals The computational challenge of lattice chiral symmetry - Is it worth the expense?

2020 ◽  
Vol 245 ◽  
pp. 06034
Author(s):  
Adam Virgili ◽  
Waseem Kamleh ◽  
Derek Leinweber
Keyword(s):  
Energy Spectrum ◽  
Lattice Qcd ◽  
Chiral Symmetry ◽  
Significant Role ◽  
Potential Role ◽  
Roper Resonance ◽  
Nucleon Spectrum ◽  
Significant Interest ◽  
The Subject

The origin of the low-lying position of the Roper resonance in the nucleon energy spectrum has been the subject of significant interest for many years, including several investigations using lattice QCD. It has been claimed that chiral symmetry plays an important role in our understanding of this resonance. We present results from our systematic examination of the potential role of chiral symmetry in the low-lying nucleon spectrum through the direct comparison of the clover and overlap fermion actions. After a brief summary of the background motivation, we specify the computational details of the study and outline our comparison methodologies. We do not find any evidence supporting the claim that chiral symmetry plays a significant role in understanding the Roper resonance on the lattice.

scholarly journals The role of SU(3)-flavour symmetry breaking in B-meson decay constants from Lattice QCD

2017 ◽  
Author(s):  
Sophie Hollitt ◽  
Paul Douglas Jackson ◽  
Ross Young ◽  
James Zanotti
Keyword(s):  
Symmetry Breaking ◽  
Lattice Qcd ◽  
B Meson ◽  
Meson Decay ◽  
B Meson Decay ◽  
Decay Constants ◽  
Flavour Symmetry
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