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High Energy Physics - Lattice

New submissions

[ total of 7 entries: 1-7 ]
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New submissions for Thu, 21 Sep 17

[1]  arXiv:1709.06596 [pdf, other]
Title: Topological susceptibility from twisted mass fermions using spectral projectors and the gradient flow
Comments: 18 pages, 19 figures
Subjects: High Energy Physics - Lattice (hep-lat)

We compare lattice QCD determinations of topological susceptibility using a gluonic definition from the gradient flow and a fermionic definition from the spectral projector method. We use ensembles with dynamical light, strange and charm flavors of maximally twisted mass fermions. For both definitions of the susceptibility we employ ensembles at three values of the lattice spacing and several quark masses at each spacing. The data are fitted to chiral perturbation theory predictions with a discretization term to determine the continuum chiral condensate in the massless limit and estimate the overall discretization errors. We find that both approaches lead to compatible results in the continuum limit, but the gluonic ones are much more affected by cut-off effects. This finally yields a much smaller total error in the spectral projector results. We show that there exists, in principle, a value of the spectral cutoff which would completely eliminate discretization effects in the topological susceptibility.

Replacements for Thu, 21 Sep 17

[2]  arXiv:1702.02954 (replaced) [pdf, ps, other]
Title: The non-perturbative structure of the photon and gluon propagators
Authors: Peter Lowdon
Comments: 17 pages; v2: additional comments added, matches published version
Journal-ref: Phys. Rev. D 96, 065013 (2017)
Subjects: High Energy Physics - Theory (hep-th); High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph)
[3]  arXiv:1704.03015 (replaced) [pdf, other]
Title: Tensor network simulation of QED on infinite lattices: learning from (1+1)d, and prospects for (2+1)d
Authors: Kai Zapp, Roman Orus
Comments: 14 pages, 12 figures, 2 tables. Final version
Journal-ref: Phys. Rev. D 95, 114508 (2017)
Subjects: High Energy Physics - Lattice (hep-lat); Strongly Correlated Electrons (cond-mat.str-el); Quantum Physics (quant-ph)
[4]  arXiv:1706.00265 (replaced) [pdf, ps, other]
Title: A complete non-perturbative renormalization prescription for quasi-PDFs
Comments: 24 pages, 10 figures, 2 Tables, Section 3 largely expanded compared to v1. Version accepted for publication in Nucl. Phys. B (invited Frontiers Article)
Subjects: High Energy Physics - Lattice (hep-lat); High Energy Physics - Phenomenology (hep-ph)
[5]  arXiv:1706.00469 (replaced) [pdf, other]
Title: Nucleon electromagnetic form factors using lattice simulations at the physical point
Comments: 20 pages, 32 figures, and 11 tables. Changes in version 2: Updated to match published version
Subjects: High Energy Physics - Lattice (hep-lat)
[6]  arXiv:1706.09833 (replaced) [pdf, other]
Title: Cosmological Effective Hamiltonian from full Loop Quantum Gravity Dynamics
Comments: 6 pages, 2 figures. Added references and a section with a toy model (example of the effective dynamics)
Subjects: General Relativity and Quantum Cosmology (gr-qc); High Energy Physics - Lattice (hep-lat); High Energy Physics - Theory (hep-th)
[7]  arXiv:1707.04279 (replaced) [pdf, other]
Title: Testing the threshold expansion for three-particle energies at fourth order in $φ^4$ theory
Comments: 33 pages, 8 figures (v2: Typos corrected, explanations improved, results unchanged---consistent with published version)
Subjects: High Energy Physics - Lattice (hep-lat)
[ total of 7 entries: 1-7 ]
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