Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Pittler Ferenc"'
Publikováno v:
Phys. Rev. D 110, 094514 (2024)
We investigate contributions of excited states to nucleon matrix elements computed in lattice QCD by employing, in addition to the standard nucleon interpolating operator, pion-nucleon ($\pi$-$N$) operators. We solve a generalized eigenvalue problem
Externí odkaz:
http://arxiv.org/abs/2408.03893
We investigate contributions of excited states to nucleon matrix elements by studying the two- and three-point functions using nucleon and pion-nucleon interpolating fields. This study is carried out using twisted mass fermion ensembles with pion mas
Externí odkaz:
http://arxiv.org/abs/2312.15737
Autor:
Alexandrou, Constantia, Bacchio, Simone, Koutsou, Giannis, Leontiou, Theodoros, Paul, Srijit, Petschlies, Marcus, Pittler, Ferenc
Publikováno v:
Phys. Rev. D109 (2024) 3, 034509
We present an investigation of pion-nucleon elastic scattering in the $I\,(J^P) = \frac{3}{2}\,(\frac{3}{2}^+)$ channel using lattice QCD with degenerate up and down, strange and charm quarks with masses tuned to their physical values. We use an ense
Externí odkaz:
http://arxiv.org/abs/2307.12846
Autor:
Capitani Stefano, De Divitiis Giulia Maria, Dimopoulos Petros, Frezzotti Roberto, Garofalo Marco, Knippschild Bastian, Kostrzewa Bartosz, Pittler Ferenc, Rossi Giancarlo, Urbach Carsten
Publikováno v:
EPJ Web of Conferences, Vol 175, p 08008 (2018)
Based on a recent proposal according to which elementary particle masses could be generated by a non-perturbative dynamical phenomenon, alternative to the Higgs mechanism, we carry out lattice simulations of a model where a non-abelian strongly inter
Externí odkaz:
https://doaj.org/article/3551444598af4342a25cc1bbbc8d96dd
Autor:
Bruckmann Falk, Endrődi Gergely, Giordano Matteo, Katz Sándor D., Kovács Tamás G., Pittler Ferenc, Wellnhofer Jacob
Publikováno v:
EPJ Web of Conferences, Vol 175, p 07014 (2018)
We will discuss the issue of Landau levels of quarks in lattice QCD in an external magnetic field. We will show that in the two-dimensional case the lowest Landau level can be identified unambiguously even if the strong interactions are turned on. St
Externí odkaz:
https://doaj.org/article/18217f0b0bbc475fb3f6abdae4439e21
Autor:
Capitani Stefano, Divitiis Giulia Maria de, Dimopoulos Petros, Frezzotti Roberto, Garofalo Marco, Knippschild Bastian, Kostrzewa Bartosz, Pittler Ferenc, Rossi Giancarlo, Urbach Carsten
Publikováno v:
EPJ Web of Conferences, Vol 175, p 08009 (2018)
In this contribution we lay down a lattice setup that allows for the nonperturbative study of a field theoretical model where a SU(2) fermion doublet, subjected to non-Abelian gauge interactions, is also coupled to a complex scalar field doublet via
Externí odkaz:
https://doaj.org/article/5bf2df0e8d6b45278e0bd25274c6085b
Autor:
Burri, Sebastian, Kanwar, Gurtej, Alexandrou, Constantia, Bacchio, Simone, Bergner, Georg, Finkenrath, Jacob, Gasbarro, Andrew, Hadjiyiannakou, Kyriakos, Jansen, Karl, Kostrzewa, Bartosz, Koutsou, Giannis, Ottnad, Konstantin, Petschlies, Marcus, Pittler, Ferenc, Steffens, Fernanda, Urbach, Carsten, Wenger, Urs
Pseudoscalar-pole diagrams are an important component of estimates of the hadronic light-by-light (HLbL) contribution to the muon $g-2$. We report on our computation of the transition form factors $\mathcal{F}_{P \rightarrow \gamma^* \gamma^*}$ for t
Externí odkaz:
http://arxiv.org/abs/2212.10300
Autor:
Alexandrou, Constantia, Bacchio, Simone, Burri, Sebastian, Finkenrath, Jacob, Gasbarro, Andrew, Hadjiyiannakou, Kyriakos, Jansen, Karl, Kanwar, Gurtej, Kostrzewa, Bartosz, Ottnad, Konstantin, Petschlies, Marcus, Pittler, Ferenc, Urbach, Carsten, Wenger, Urs
Publikováno v:
Phys. Rev. D 108 (2023) 054509
We calculate the double-virtual $\eta \rightarrow \gamma^* \gamma^*$ transition form factor $\mathcal{F}_{\eta \to \gamma^* \gamma^*}(q_1^2,q_2^2)$ from first principles using a lattice QCD simulation with $N_f=2+1+1$ quark flavors at the physical pi
Externí odkaz:
http://arxiv.org/abs/2212.06704
Autor:
Kostrzewa, Bartosz, Bacchio, Simone, Finkenrath, Jacob, Garofalo, Marco, Pittler, Ferenc, Romiti, Simone, Urbach, Carsten
We present how we ported the Hybrid Monte Carlo implementation in the tmLQCD software suite to GPUs through offloading its most expensive parts to the QUDA library. We discuss our motivations and some of the technical challenges that we encountered a
Externí odkaz:
http://arxiv.org/abs/2212.06635
Autor:
Bruckmann Falk, Endrődi Gergely, Giordano Matteo, Katz Sándor D., Kovács Tamás G., Pittler Ferenc, Wellnhofer Jacob
Publikováno v:
EPJ Web of Conferences, Vol 137, p 03003 (2017)
The thermodynamics of Quantum Chromodynamics (QCD) in external (electro-)magnetic fields shows some unexpected features like inverse magnetic catalysis, which have been revealed mainly through lattice studies. Many effective descriptions, on the othe
Externí odkaz:
https://doaj.org/article/30f23dda7974472fa5dba9c6cf1cb41a