Results 21 to 30 of about 26,590 (306)
Three-particle quantization condition in a finite volume: 1. The role of the three-particle force
Journal of High Energy Physics, 2017 Using non-relativistic effective Lagrangians in the particle-dimer picture, we rederive the expression for the energy shift of a loosely bound three-particle bound state of identical bosons in the unitary limit.
Hans-Werner Hammer +2 more
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Towards high-precision parton distributions from lattice QCD via distillation
Journal of High Energy Physics, 2021 We apply the Distillation spatial smearing program to the extraction of the unpolarized isovector valence PDF of the nucleon. The improved volume sampling and control of excited-states afforded by distillation leads to a dramatically improved ...
Colin Egerer +8 more
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A simple approach towards the sign problem using path optimisation
Journal of High Energy Physics, 2018 We suggest an approach for simulating theories with a sign problem that relies on optimisation of complex integration contours that are not restricted to lie along Lefschetz thimbles.
Francis Bursa, Michael Kroyter
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Journal of High Energy Physics, 2021 We present the first lattice investigation of coupled-channel D D ¯ $$ D\overline{D} $$ and D s D ¯ s $$ {D}_s{\overline{D}}_s $$ scattering in the J PC = 0++ and 2++ channels.
Sasa Prelovsek +4 more
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Nuclear Lattice simulations with Chiral Effective Field Theory [PDF]
Proceedings of VIIIth Conference Quark Confinement and the Hadron Spectrum — PoS(ConfinementVIII), 2012 We present recent results on lattice simulations using chiral effective field theory. In particular we discuss lattice simulations for dilute neutron matter at next-to-leading order and three-body forces in light nuclei at next-to-next-to-leading order.
openaire +2 more sources
New techniques and results for worldline simulations of lattice field theories [PDF]
EPJ Web of Conferences, 2018 We use the complexø4field at finite density as a model system for developing further techniques based on worldline formulations of lattice field theories. More specifically we: 1) Discuss new variants of the worm algorithm for updating theø4theory and related systems with site weights.
Giuliani Mario +2 more
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Journal of High Energy Physics, 2017 We derive the three-body quantization condition in a finite volume using an effective field theory in the particle-dimer picture. Moreover, we consider the extraction of physical observables from the lattice spectrum using the quantization condition.
Hans-Werner Hammer +2 more
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Double parton distributions in the pion from lattice QCD
Journal of High Energy Physics, 2021 We perform a lattice study of double parton distributions in the pion, using the relationship between their Mellin moments and pion matrix elements of two local currents. A good statistical signal is obtained for almost all relevant Wick contractions. We
Gunnar S. Bali +6 more
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Charge-Order on the Triangular Lattice: A Mean-Field Study for the Lattice S = 1/2 Fermionic Gas [PDF]
, 2021 The adsorbed atoms exhibit tendency to occupy a triangular lattice formed by periodic potential of the underlying crystal surface. Such a lattice is formed by, e.g., a single layer of graphane or the graphite surfaces as well as (111) surface of face ...
Konrad Jerzy Kapcia +1 more
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Gradient flows without blow-up for Lefschetz thimbles
Journal of High Energy Physics, 2017 We propose new gradient flows that define Lefschetz thimbles and do not blow up in a finite flow time. We study analytic properties of these gradient flows, and confirm them by numerical tests in simple examples.
Yuya Tanizaki +2 more
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