Zobrazeno 1 - 10
of 1 850
pro vyhledávání: '"P. Leinweber"'
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
The magnetic polarisabilities of octet baryons are calculated close to the physical quark-mass point using the background field method in lattice QCD. This first calculation draws on the identification and elimination of exceptional configurations th
Externí odkaz:
http://arxiv.org/abs/2412.08960
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
The quark mass dependence of octet baryon magnetic polarisabilities is examined at the level of individual quark-sector contributions in the uniform background-field approach of lattice QCD. The aim is to understand the direct impact of increasing th
Externí odkaz:
http://arxiv.org/abs/2410.15632
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
We present an exploratory lattice QCD analysis of the $ \Omega $-baryon spectrum. Using smeared three-quark operators in a correlation matrix analysis, we report masses for the ground, first and second excited states of the $ J^P = 1/2^\pm,\, 3/2^\pm
Externí odkaz:
http://arxiv.org/abs/2408.16281
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, 074514 (2024)
Drawing on recent advances in lattice-QCD background-field techniques, the magnetic polarisability of octet baryons is calculated from the first principles of QCD. The results are presented in the context of new constituent quark-model calculations p
Externí odkaz:
http://arxiv.org/abs/2407.01064
We present a coupled-channel analysis of the $ J^P = 3/2^+ \Delta $-baryon spectrum, based in the framework of Hamiltonian Effective Field Theory (HEFT). We construct a Hamiltonian which mixes quark model-like single-particle states and two-particle
Externí odkaz:
http://arxiv.org/abs/2406.00981
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