Zobrazeno 1 - 10
of 527
pro vyhledávání: '"P. de Forcrand"'
We study good, bad and not-even-bad diquarks on the lattice in a gauge-invariant formalism in full QCD. We establish their spectral masses with short extrapolations to the physical point, observing agreement with phenomenological expectations. We fin
Externí odkaz:
http://arxiv.org/abs/2201.03332
We study diquarks on the lattice in the background of a static quark, in a gauge-invariant formalism with quark masses down to almost physical $m_\pi$. We determine mass differences between diquark channels as well as diquark-quark mass differences.
Externí odkaz:
http://arxiv.org/abs/2106.09080
Autor:
de Forcrand, Philippe, Jäger, Benjamin
We present an update on our efforts to determine the Taylor coefficients of the $\mu/T$ expansion of the pressure for finite-density QCD. Here, we explore alternatives based on the Cauchy Residue Theorem, which allows us to use a discretized contour
Externí odkaz:
http://arxiv.org/abs/1812.00869
Autor:
Bietenholz, Wolfgang, de Forcrand, Philippe, Gerber, Urs, Mejía-Díaz, Héctor, Sandoval, Ilya O.
Publikováno v:
Phys. Rev. D 98, 114501 (2018)
The 2d O(3) model is widely used as a toy model for ferromagnetism and for Quantum Chromodynamics. With the latter it shares --- among other basic aspects --- the property that the continuum functional integral splits into topological sectors. Topolo
Externí odkaz:
http://arxiv.org/abs/1808.08129
Autor:
de Forcrand, Philippe, Keegan, Liam
Publikováno v:
Phys. Rev. E 98, 043306 (2018)
The dominant cost of most lattice QCD simulations is the inversion of the Dirac operator required to calculate the force term in the RHMC update. One way to improve this situation is to use multiple pseudofermions, which reduces the size and variance
Externí odkaz:
http://arxiv.org/abs/1808.01829
Autor:
Mejía-Díaz, Héctor, Bietenholz, Wolfgang, Cichy, Krzysztof, de Forcrand, Philippe, Dromard, Arthur, Gerber, Urs, Sandoval, Ilya O.
We study the impact of the Gradient Flow on the topology in various models of lattice field theory. The topological susceptibility $\chi_{\rm t}$ is measured directly, and by the slab method, which is based on the topological content of sub-volumes (
Externí odkaz:
http://arxiv.org/abs/1712.01395
Publikováno v:
Journal of High Energy Physics, Vol 2022, Iss 5, Pp 1-21 (2022)
Abstract We study diquarks on the lattice in the background of a static quark, in a gauge-invariant formalism with quark masses down to almost physical m π . We determine mass differences between diquark channels as well as diquark-quark mass differ
Externí odkaz:
https://doaj.org/article/cd731bf9a9394872bb8871d4bf80167d
Coupling spin models to complex external fields can give rise to interesting phenomena like zeroes of the partition function (Lee-Yang zeroes, edge singularities) or oscillating propagators. Unfortunately, it usually also leads to a severe sign probl
Externí odkaz:
http://arxiv.org/abs/1711.00042
Several important observables, like the quark condensate and the Taylor coefficients of the expansion of the QCD pressure with respect to the chemical potential, are based on the trace of the inverse Dirac operator and of its powers. Such traces are
Externí odkaz:
http://arxiv.org/abs/1710.07305
Publikováno v:
Phys. Rev. D 97, 034512 (2018)
Anisotropic lattice spacings are mandatory to reach the high temperatures where chiral symmetry is restored in the strong coupling limit of lattice QCD. Here, we propose a simple criterion for the nonperturbative renormalisation of the anisotropy cou
Externí odkaz:
http://arxiv.org/abs/1710.00611