Zobrazeno 1 - 10
of 1 833
pro vyhledávání: '"P. Leinweber"'
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
We refine our previous calculation of multipole amplitude $E_{0+}$ for pion photo-production process, $\gamma N\rightarrow\pi N$. The treatment of final state interactions is based upon an earlier analysis of pion-nucleon scattering within Hamiltonia
Externí odkaz:
http://arxiv.org/abs/2407.05334
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
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:
Pfister, Lena, Gohm, Alexander, Kossmann, Meinolf, Wieser, Andreas, Babić, Nevio, Handwerker, Jan, Wildmann, Norman, Vogelmann, Hannes, Baumann-Stanzer, Kathrin, Alexa, Almut, Lapo, Karl, Paunović, Ivan, Leinweber, Ronny, Sedlmeier, Katrin, Lehner, Manuela, Hieden, Alexander, Speidel, Johannes, Federer, Maria, Rotach, Mathias W.
The multi-scale transport and exchange processes in the atmosphere over mountains -- programme and experiment (TEAMx) wants to advance the understanding of transport and exchange processes over mountainous terrain as well as to collect unique multi-s
Externí odkaz:
http://arxiv.org/abs/2401.06500
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