Zobrazeno 1 - 10
of 232
pro vyhledávání: '"Bali, Gunnar S."'
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:
Bali, Gunnar S., Collins, Sara, Georg, Peter, Jenkins, Daniel, Korcyl, Piotr, Schäfer, Andreas, Scholz, Enno E., Simeth, Jakob, Söldner, Wolfgang, Weishäupl, Simon
Publikováno v:
JHEP 05 (2023) 035
We determine the light baryon spectrum on ensembles generated by the Coordinated Lattice Simulations (CLS) effort, employing $N_f=2+1$ flavours of non-perturbatively improved Wilson fermions. The hadron masses are interpolated and extrapolated within
Externí odkaz:
http://arxiv.org/abs/2211.03744
Publikováno v:
Phys. Rev. D 105, 054516 (2022)
We determine the leading order mesonic~($B_0$ and $F_0$) and baryonic~($m_0$, $D$ and $F$) SU(3) chiral perturbation theory low energy constants from lattice QCD. We employ gauge ensembles with $N_f=3$ (i.e., $m_u=m_d=m_s$) non-perturbatively improve
Externí odkaz:
http://arxiv.org/abs/2201.05591
Publikováno v:
PoS(LATTICE2021)286
We present results for the $\eta$ and $\eta^\prime$ masses and their four independent decay constants at the physical point as well as their anomalous gluonic matrix elements $a_{\eta^{(\prime)}}$. The chiral and continuum limit extrapolation is perf
Externí odkaz:
http://arxiv.org/abs/2111.05656
Excited state contamination is one of the most challenging sources of systematics to tackle in the determination of nucleon matrix elements and form factors. The signal-to-noise problem prevents one from considering large source-sink time separations
Externí odkaz:
http://arxiv.org/abs/2110.11908
Publikováno v:
JHEP08(2021)137
We determine the masses, the singlet and octet decay constants as well as the anomalous matrix elements of the $\eta$ and $\eta^\prime$ mesons in $N_f=2+1$ QCD\@. The results are obtained using twenty-one CLS ensembles of non-perturbatively improved
Externí odkaz:
http://arxiv.org/abs/2106.05398
Publikováno v:
JHEP09(2021)106
We evaluate nucleon four-point functions in the framework of lattice QCD in order to extract the first Mellin moment of double parton distributions (DPDs) in the unpolarized proton. In this first study, we employ an nf = 2 + 1 ensemble with pseudosca
Externí odkaz:
http://arxiv.org/abs/2106.03451
Autor:
Bali, Gunnar S., Castagnini, Luca, Diehl, Markus, Gaunt, Jonathan R., Gläßle, Benjamin, Schäfer, Andreas, Zimmermann, Christian
We perform a lattice study of double parton distributions in the pion, using the relationship between their Mellin moments and pion matrix elements of two local currents. A good statistical signal is obtained for almost all relevant Wick contractions
Externí odkaz:
http://arxiv.org/abs/2006.14826
Publikováno v:
JHEP 07 (2020) 183
We determine the magnetic susceptibility of thermal QCD matter by means of first principles lattice simulations using staggered quarks with physical masses. A novel method is employed that only requires simulations at zero background field, thereby c
Externí odkaz:
http://arxiv.org/abs/2004.08778
Autor:
Bali, Gunnar S., Barca, Lorenzo, Collins, Sara, Gruber, Michael, Löffler, Marius, Schäfer, Andreas, Söldner, Wolfgang, Wein, Philipp, Weishäupl, Simon, Wurm, Thomas
Publikováno v:
JHEP05 (2020) 126
We present a new analysis method that allows one to understand and model excited state contributions in observables that are dominated by a pion pole. We apply this method to extract axial and (induced) pseudoscalar nucleon isovector form factors, wh
Externí odkaz:
http://arxiv.org/abs/1911.13150