Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Gunnar S. Bali"'
Autor:
The RQCD collaboration, Gunnar S. Bali, Sara Collins, Peter Georg, Daniel Jenkins, Piotr Korcyl, Andreas Schäfer, Enno E. Scholz, Jakob Simeth, Wolfgang Söldner, Simon Weishäupl
Publikováno v:
Journal of High Energy Physics, Vol 2023, Iss 5, Pp 1-131 (2023)
Abstract 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 extrapol
Externí odkaz:
https://doaj.org/article/472532da0c334f24a466ed3c0f69deea
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 9, Pp 1-75 (2021)
Abstract 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 n f = 2+1 ensemble with p
Externí odkaz:
https://doaj.org/article/b2d0a2d69eaf4438a23fa3bf4784b629
Autor:
The RQCD collaboration, Gunnar S. Bali, Vladimir Braun, Sara Collins, Andreas Schäfer, Jakob Simeth
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 8, Pp 1-94 (2021)
Abstract We determine the masses, the singlet and octet decay constants as well as the anomalous matrix elements of the η and η′ mesons in N f = 2 + 1 QCD. The results are obtained using twenty-one CLS ensembles of non-perturbatively improved Wil
Externí odkaz:
https://doaj.org/article/9885411c675440fab0a5983adf9599ae
Autor:
Gunnar S. Bali, Luca Castagnini, Markus Diehl, Jonathan R. Gaunt, Benjamin Gläßle, Andreas Schäfer, Christian Zimmermann
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 2, Pp 1-57 (2021)
Abstract 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 con
Externí odkaz:
https://doaj.org/article/72f03637e43d4c82a020037a1326e2ec
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 7, Pp 1-43 (2020)
Abstract 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,
Externí odkaz:
https://doaj.org/article/b8fc1a14ae0d42fd9c18be6aadf0caeb
Autor:
The RQCD collaboration, Gunnar S. Bali, Lorenzo Barca, Sara Collins, Michael Gruber, Marius Löffler, Andreas Schäfer, Wolfgang Söldner, Philipp Wein, Simon Weishäupl, Thomas Wurm
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 5, Pp 1-59 (2020)
Abstract 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 fa
Externí odkaz:
https://doaj.org/article/ca8b777e03574a99b87093098503dd55
Autor:
Gunnar S. Bali, Vladimir M. Braun, Simon Bürger, Meinulf Göckeler, Michael Gruber, Fabian Hutzler, Piotr Korcyl, Andreas Schäfer, André Sternbeck, Philipp Wein, on behalf of the RQCD collaboration
Publikováno v:
Journal of High Energy Physics, Vol 2020, Iss 11, Pp 1-3 (2020)
Abstract We update our lattice determination of the two lowest Gegenbauer moments of the leading-twist pion and kaon light-cone distribution amplitudes [1]
Externí odkaz:
https://doaj.org/article/d0ca58ead03d478eb9dbf10a9a002e12
Autor:
Gunnar S. Bali, Vladimir M. Braun, Simon Bürger, Meinulf Göckeler, Michael Gruber, Fabian Hutzler, Piotr Korcyl, Andreas Schäfer, André Sternbeck, Philipp Wein, on behalf of the RQCD collaboration
Publikováno v:
Journal of High Energy Physics, Vol 2019, Iss 8, Pp 1-35 (2019)
Abstract We present the first lattice determination of the two lowest Gegenbauer moments of the leading-twist pion and kaon light-cone distribution amplitudes with full control of all errors: a 2 π = 0.101 − 24 + 24 $$ {a}_2^{\pi }={0.101}_{-24}^{
Externí odkaz:
https://doaj.org/article/de6d73512e564e3c931c35e33fb0110d
Autor:
Gunnar S. Bali, Peter C. Bruns, Luca Castagnini, Markus Diehl, Jonathan R. Gaunt, Benjamin Gläßle, Andreas Schäfer, André Sternbeck, Christian Zimmermann
Publikováno v:
Journal of High Energy Physics, Vol 2018, Iss 12, Pp 1-48 (2018)
Abstract We perform a systematic study of the correlation functions of two quark currents in a pion using lattice QCD. We obtain good signals for all but one of the relevant Wick contractions of quark fields. We investigate the quark mass dependence
Externí odkaz:
https://doaj.org/article/aa10e9f175664520b14086637699d4be
Autor:
Gunnar S. Bali, Vladimir M. Braun, Benjamin Gläßle, Meinulf Göckeler, Michael Gruber, Fabian Hutzler, Piotr Korcyl, Bernhard Lang, Andreas Schäfer, Philipp Wein, Jian-Hui Zhang
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 78, Iss 3, Pp 1-8 (2018)
Abstract Following the proposal in (Braun and Müller. Eur Phys J C55:349, 2008), we study the feasibility to calculate the pion distribution amplitude (DA) from suitably chosen Euclidean correlation functions at large momentum. In our lattice study
Externí odkaz:
https://doaj.org/article/3abdbbe0c21b4dfba92fb19bbd32b278