Zobrazeno 1 - 10
of 285
pro vyhledávání: '"Bali Gunnar"'
Nucleon weak matrix elements can be extracted from nucleon correlation functions with lattice QCD simulations. The signal-to-noise ratio prohibits the analysis at large source-sink separations and as a consequence, excited state contamination affects
Externí odkaz:
http://arxiv.org/abs/2405.20875
Autor:
Bali, Gunnar S., Collins, Sara, Heybrock, Simon, Löffler, Marius, Rödl, Rudolf, Söldner, Wolfgang, Weishäupl, Simon
Publikováno v:
Phys.Rev.D 108, 034512 (2023)
We determine the axial, scalar and tensor isovector charges of the nucleon, sigma and cascade baryons as well as the difference between the up and down quark masses, $m_u-m_d$. We employ gauge ensembles with $N_f=2+1$ non-perturbatively improved Wils
Externí odkaz:
http://arxiv.org/abs/2305.04717
Autor:
Auge, Tanja, Bali, Gunnar, Klettke, Meike, Ludäscher, Bertram, Söldner, Wolfgang, Weishäupl, Simon, Wettig, Tilo
We present a provenance model for the generic workflow of numerical Lattice Quantum Chromodynamics (QCD) calculations, which constitute an important component of particle physics research. These calculations are carried out on the largest supercomput
Externí odkaz:
http://arxiv.org/abs/2303.12640
Autor:
Petrak, Pia Leonie Jones, Bali, Gunnar, Collins, Sara, Heitger, Jochen, Jenkins, Daniel, Weishäupl, Simon
A lot of progress has been made in the direct determination of nucleon sigma terms. Using similar methods, we consider the sigma terms of the other octet baryons as well. These are determined on CLS gauge field ensembles employing the L\"uscher-Weisz
Externí odkaz:
http://arxiv.org/abs/2301.03871
Autor:
Bali, Gunnar, Bignell, Ryan, Francis, Anthony, Gottlieb, Steven, Gupta, Rajan, Kanamori, Issaku, Kostrzewa, Bartosz, Kotov, Andrey Yu., Kuramashi, Yoshinobu, Mawhinney, Robert, Schmidt, Christian, Söldner, Wolfgang, Sun, Peng
Publikováno v:
PoS(LATTICE2022)203
The generation of ensembles of gauge configurations is a considerable expense. The preservation and curation of these ensembles constitutes a valuable shared resource for the lattice field theory community. The organizers of Lattice 2022 dedicated a
Externí odkaz:
http://arxiv.org/abs/2212.10138
Publikováno v:
EPJ Web of Conferences, Vol 175, p 13005 (2018)
The leptonic decay of the charged pion in the presence of background magnetic fields is investigated using quenched Wilson fermions. It is demonstrated that the magnetic field opens up a new channel for this decay. The magnetic field-dependence of th
Externí odkaz:
https://doaj.org/article/92e0296a012b4cc899ab10f0fbc7141e
Publikováno v:
EPJ Web of Conferences, Vol 175, p 05028 (2018)
We present preliminary results for the masses and decay constants of the η and η′ mesons using CLS Nf = 2 + 1 ensembles. One of the major challenges in these calculations are the large statistical fluctuations due to disconnected quark loops. We
Externí odkaz:
https://doaj.org/article/7cb148025e1d4b1d8590e9d7515fe419
Autor:
Bali Gunnar, Collins Sara, Mohler Daniel, Padmanath M., Piemonte Stefano, Prelovsek Sasa, Weishäupl Simon
Publikováno v:
EPJ Web of Conferences, Vol 175, p 05020 (2018)
The nature of resonances and excited states near decay thresholds is encoded in scattering amplitudes, which can be extracted from single-particle and multiparticle correlators in finite volumes. Lattice calculations have only recently reached the pr
Externí odkaz:
https://doaj.org/article/a9a22c56dd95438a817846dc38356672
Autor:
Bali Gunnar S., Collins Sara, Gläßle Benjamin, Heybrock Simon, Korcyl Piotr, Löffler Marius, Rödl Rudolf, Schäfer Andreas
Publikováno v:
EPJ Web of Conferences, Vol 175, p 06014 (2018)
We have implemented a new way of computing three-point correlation functions. It is based on a factorization of the entire correlation function into two parts which are evaluated with open spin-(and to some extent flavor-) indices. This allows us to
Externí odkaz:
https://doaj.org/article/94cbea4f6c1d4419834c458cf4eadeaf
Publikováno v:
Phys.Rev.D 107 (2023) 5
QCD matrix elements of axial and vector currents between nucleons are required for the Monte Carlo reconstruction of the energy of neutrinos that are detected in long baseline oscillation experiments in the quasi-elastic regime. The cleanest approach
Externí odkaz:
http://arxiv.org/abs/2211.12278