Results 61 to 70 of about 487,040 (231)
Renormalisation of composite operators in lattice QCD: perturbative versus nonperturbative [PDF]
, 2010 The perturbative and nonperturbative renormalisation of quark-antiquark operators in lattice QCD with two flavours of clover fermions is investigated within the research programme of the QCDSF collaboration.
James Zanotti +21 more
core +1 more source
Berry Phase in Lattice QCD [PDF]
Physical Review Letters, 2016 We propose the lattice QCD calculation of the Berry phase which is defined by the ground state of a single fermion. We perform the ground-state projection of a single-fermion propagator, construct the Berry link variable on a momentum-space lattice, and calculate the Berry phase. As the first application, the first Chern number of the (2+1)-dimensional
openaire +3 more sources
The γπ → ππ anomaly from lattice QCD and dispersion relations
Journal of High Energy Physics, 2021 We propose a formalism to extract the γπ → ππ chiral anomaly F 3π from calculations in lattice QCD performed at larger-than-physical pion masses. To this end, we start from a dispersive representation of the γ (*) π → ππ amplitude, whose main quark-mass ...
Malwin Niehus +2 more
doaj +1 more source
Lattice QCD and string theory [PDF]
Proceedings of XXIIIrd International Symposium on Lattice Field Theory — PoS(LAT2005), 2005 Bosonic string formation in gauge theories is reviewed with particular attention to the confining flux in lattice QCD and its string theory description. Recent results on the Casimir energy of the ground state and the string excitation spectrum are analyzed in the Dirichlet string limit of large separation between static sources.
openaire +4 more sources
Small, EarlyView.Nanometer‐sized Rh clusters provide a specific reaction environment that facilitates the balanced co‐adsorption of styrene, CO, and H, thereby promoting hydroformylation. ABSTRACT The size of the reactive metal domain, termed an ‘ensemble’, in supported metal catalysts critically influences their catalytic activity.
Yuki Nakaya +5 more
wiley +1 more source
Scalar mesons and tetraquarks by means of lattice QCD [PDF]
, 2012 We study the light scalar mesons a_0(980) and kappa using N_f = 2+1+1 flavor lattice QCD. In order to probe the internal structure of these scalar mesons, and in particular to identify, whether a sizeable tetraquark component is present, we use a large ...
Daldrop, Jan Oliver +7 more
core
Improved hadronic measurements and spectral sums on the lattice [PDF]
, 2008 In this thesis we address several topics of lattice QCD. As a first project we perform calculations of ground and excited states of light mesons. Especially the extraction of the excited states turns out be very difficult.
Hagen, Christian
core +1 more source
Polynomial Preconditioning for Indefinite Matrices
Numerical Linear Algebra with Applications, Volume 33, Issue 5, October 2026.ABSTRACT Polynomial preconditioning is an important tool in solving large linear systems and eigenvalue problems. A polynomial from GMRES can be used to precondition restarted GMRES and restarted Arnoldi. Here we give methods for indefinite matrices that make polynomial preconditioning more generally applicable. The new techniques include balancing the
Hayden Henson, Ronald B. Morgan
wiley +1 more source
Charmonium correlation and spectral functions in quenched lattice QCD at finite temperature [PDF]
, 2010 Ding H. Charmonium correlation and spectral functions in quenched lattice QCD at finite temperature. Bielefeld (Germany): Bielefeld University; 2010.In this thesis, we have investigated the properties of charmonium states at finite temperature in ...
Ding, Hengtong
core
Search of QCD phase transition points in the canonical approach of the NJL model
Physics Letters B, 2019 We study the Lee-Yang zeros in the canonical approach to search phase transition points at finite temperature and density in the Nambu-Jona-Lasinio (NJL) model as an effective model of QCD.
Masayuki Wakayama, Atsushi Hosaka
doaj +1 more source