101 citations · 615 across the 39 of their papers we have counts for
33 papers · 1 filter
Symmetries of the light hadron spectrum in high temperature QCD
C. Rohrhofer, Y. Aoki, G. Cossu +6
Properties of QCD matter change significantly around the chiral crossover temperature, and the effects on and topological susceptibilities, as well as the meson spectrum h…
Approximate degeneracy of spatial correlators in high temperature QCD
C. Rohrhofer, Y. Aoki, G. Cossu +5
We study spatial isovector meson correlators in QCD with dynamical domain-wall fermions on lattices at temperatures MeV. We measure the correlato…
Operators for scattering of particles with spin
S. Prelovsek, U. Skerbis, C. B. Lang
Operators for simulating the scattering of two particles with spin are constructed. Three methods are shown to give the consistent lattice operators for PN, PV, VN and NN scatterin…
Lattice operators for scattering of particles with spin
S. Prelovsek, U. Skerbis, C. B. Lang
We construct operators for simulating the scattering of two hadrons with spin on the lattice. Three methods are shown to give the consistent operators for PN, PV, VN and NN scatter…
Pion Nucleon Scattering: Some Results from Lattice QCD
C. B. Lang, V. Verduci
Including the meson-baryon (5 quark) intermediate states in a lattice simulation is challenging. However, it is important in order to obtain the correct energy eigenstates and to r…
More effects of Dirac low-mode removal
M. Schröck, M. Denissenya, L. Ya. Glozman +1
In previous studies we have shown that hadrons, except for a pion, survive the removal of the lowest lying Dirac eigenmodes from the valence quark propagators. The low-modes are ti…
Low-lying Lambda Baryons from the Lattice
Georg P. Engel, C. B. Lang, Andreas Schäfer
In a lattice QCD calculation with two light dynamical Chirally Improved (CI) quarks we determine ground state and some excited state masses in all four Lambda baryon channels 1/2^\…
Axial charges of excited nucleons from CI-fermions
T. Maurer, T. Burch, L. Ya. Glozman +3
We report lattice QCD results on the axial charges of ground and excited nucleon states of both parities. This is the first study of these quantities with approximately chiral (CI)…
Decay of rho and a1 mesons on the lattice using distillation
S. Prelovsek, C. B. Lang, D. Mohler +1
We extract the P-wave pi-pi phase shift for five values of pion relative momenta, which gives information on the rho resonance. The Breit-Wigner formula describes the pi-pi phase s…
Effective chiral restoration in the rho'-meson in lattice QCD
L. Ya. Glozman, C. B. Lang, M. Limmer
In simulations with dynamical quarks it has been established that the ground state rho in the infrared is a strong mixture of the two chiral representations (0,1)+(1,0) and (1/2,1/…
Lattice study of light scalar tetraquarks with I=0,2,1/2,3/2: are sigma and kappa tetraquarks?
S. Prelovsek, T. Draper, C. B. Lang +4
We investigate whether the lightest scalar mesons sigma and kappa have a large tetraquark component, as is strongly supported by many phenomenological studies. A search for possibl…
Excited hadrons in n_f=2 QCD
G. Engel, C. Gattringer, C. B. Lang +3
The chirally improved (CI) fermion action allows us to obtain results for pion masses down to 320 MeV on (in lattice units) comparatively small lattices with physical extent of 2.4…
Spectroscopy of light tetraquark states
S. Prelovsek, T. Draper, C. B. Lang +4
We address the question whether the lightest scalar mesons sigma and kappa are tetraquarks, as is strongly supported by many phenomenological studies. We present a search for possi…
The chiral and angular momentum content of the rho-meson
Leonid Ya. Glozman, C. B. Lang, Markus Limmer
It is possible to define and calculate in a gauge-invariant manner the chiral as well as the partial wave content of the quark-antiquark Fock component of a meson in the infrared,…
Canonical fermion determinants in lattice QCD - Numerical evaluation and properties
Erek Bilgici, Julia Danzer, Christof Gattringer +2
We analyze canonical fermion determinants, i.e., fermion determinants projected to a fixed quark number q. The canonical determinants are computed using a dimensional reduction for…
Angular momentum content of the rho-meson in lattice QCD
Leonid Ya. Glozman, C. B. Lang, Markus Limmer
The variational method allows one to study the mixing of interpolators with different chiral transformation properties in the non-perturbatively determined physical state. It is th…
Comparison of filtering methods in SU(3) lattice gauge theory
F. Bruckmann, F. Gruber, C. B. Lang +4
We systematically compare filtering methods used to extract topological excitations from lattice gauge configurations. We show that there is a strong correlation of the topological…
Meson spectroscopy with derivative quark sources
Christof Gattringer, Leonid Ya. Glozman, C. B. Lang +2
We present results for masses of light mesons obtained with the variational method using an enhanced basis of interpolating field operators with different quark smearings. The inte…
B meson excitations with chirally improved light quarks
T. Burch, D. Chakrabarti, C. Hagen +4
We present our latest results for the excitations of static-light mesons on both quenched and unquenched lattices, where the light quarks are simulated using the chirally improved…
Excited hadrons on the lattice: Baryons
Tommy Burch, Christof Gattringer, Leonid Ya. Glozman +4
We present results for masses of excited baryons from a quenched calculation with Chirally Improved quarks at pion masses down to 350 MeV. Our analysis of the correlators is based…
Excited hadrons on the lattice: Mesons
Tommy Burch, Christof Gattringer, Leonid Ya. Glozman +3
We present results for masses of excited mesons from quenched calculations using chirally improved quarks at pion masses down to 350 MeV. The key features of our analysis are the u…
Variational method for lattice spectroscopy with ghosts
Tommy Burch, Christof Gattringer, Leonid Ya. Glozman +2
We discuss the variational method used in lattice spectroscopy calculations. In particular we address the role of ghost contributions which appear in quenched or partially quenched…
Low energy constants from the chirally improved Dirac operator D_CI
Christof Gattringer, Philipp Huber, C. B. Lang
The leading order low energy parameters like the pion decay constant or the quark condensate are well-known from "classical" low energy theorems and experiments. It is a challenge,…
Experiences with dynamical chirally improved fermions
C. B. Lang, Pushan Majumdar, Wolfgang Ortner
We simulate Quantum Chromodynamics (QCD) in four Euclidean dimensions with two (degenerate mass) flavors of dynamical quarks. The Dirac operator we use is the so-called chirally im…