Zobrazeno 1 - 10
of 410
pro vyhledávání: '"Leinweber, Derek B"'
Lattice QCD calculations of the $2s$ radial excitation of the nucleon place the state at an energy of approximately 1.9 GeV, raising the possibility that it is associated with the $N1/2^+(1880)$ and $N1/2^+(1710)$ resonances through mixing with two-p
Externí odkaz:
http://arxiv.org/abs/2412.08968
Evidence for the existence of a second finite-temperature transition in Quantum Chromodynamics (QCD) is obtained through the study of centre vortex geometry and its evolution with temperature. The dynamical anisotropic ensembles of the FASTSUM collab
Externí odkaz:
http://arxiv.org/abs/2411.19446
There is strong evidence supporting center vortices as underpinning confinement and dynamical chiral symmetry breaking -- the two key features of nonperturbative QCD. In our recent letter [ arXiv:2305.18690 ] we find that dynamical mass generation va
Externí odkaz:
http://arxiv.org/abs/2410.07585
Publikováno v:
Phys. Rev. D 110, 094015 (2024)
We refine our previous calculation of multipole amplitude $E_{0+}$ for pion photoproduction process, $\gamma N\rightarrow\pi N$. The treatment of final-state interactions is based upon an earlier analysis of pion-nucleon scattering within Hamiltonian
Externí odkaz:
http://arxiv.org/abs/2407.05334
Publikováno v:
Phys. Rev. D 110, 034516 (2024)
The geometry of centre vortices is studied in $\mathrm{SU(3)}$ gauge theory at finite temperature to capture the key structural changes that occur through the deconfinement phase transition. Visualisations of the vortex structure in temporal and spat
Externí odkaz:
http://arxiv.org/abs/2405.10670
Publikováno v:
Phys.Rev.D 110 (2024) 5, 054517
The parity-expanded variational analysis (PEVA) technique enables the isolation of opposite-parity eigenstates at finite momentum. The approach has been used to perform the first lattice QCD calculations of excited-baryon form factors. In particular,
Externí odkaz:
http://arxiv.org/abs/2404.07625
Autor:
Leinweber, Derek B., Abell, Curtis D., Hockley, Liam C., Kamleh, Waseem, Liu, Zhan-Wei, Stokes, Finn M., Thomas, Anthony W., Wu, Jia-Jun
This presentation opens with a brief review of lattice QCD calculations showing the $2s$ radial excitation of the nucleon sits at approximately 2 GeV, well above the Roper resonance position. We then proceed to reconcile this observation with experim
Externí odkaz:
http://arxiv.org/abs/2401.04901
Publikováno v:
Phys. Rev. D 109, 094507 (2024)
The continued development of models that propose the existence of fractional topological objects in the Yang-Mills vacuum has called for a quantitative method to study the topological structure of $\mathrm{SU}(N)$ gauge theory. We present an original
Externí odkaz:
http://arxiv.org/abs/2312.14340
Autor:
Liu, Jiong-Jiong, Liu, Zhan-Wei, Chen, Kan, Guo, Dan, Leinweber, Derek B., Liu, Xiang, Thomas, Anthony W.
Publikováno v:
Phys. Rev. D 109, 054025 (2024)
We examine the internal structure of the $\Lambda(1670)$ through an analysis of lattice QCD simulations and experimental data within Hamiltonian effective field theory. Two scenarios are presented. The first describes the $\Lambda(1670)$ as a bare th
Externí odkaz:
http://arxiv.org/abs/2312.13072
We collect spectra extracted in the $I=\ell=1$ $\pi\pi$ sector provided by various lattice QCD collaborations and study the $m_\pi$ dependence of $\rho$-meson properties using Hamiltonian Effective Field Theory (HEFT). In this unified analysis, the c
Externí odkaz:
http://arxiv.org/abs/2311.03903