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@INPROCEEDINGS{Bali:874412,
      author       = {Bali, Gunnar S. and Collins, Sara},
      title        = {{F}lavour {S}tructure of the {B}aryon {O}ctet},
      volume       = {50},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2020-01422},
      series       = {Publication Series of the John von Neumann Institute for
                      Computing (NIC) NIC Series},
      pages        = {175 - 184},
      year         = {2020},
      comment      = {NIC Symposium 2020},
      booktitle     = {NIC Symposium 2020},
      abstract     = {We investigate aspects of the structure of different
                      baryons via simulations of quantum chromodynamics in lattice
                      regularisation (Lattice QCD). In particular, we study the
                      mass spectrum, (generalised) isovector charges as well as
                      moments of light cone distribution amplitudes. The charges
                      correspond to moments of parton distribution functions
                      (PDFs). Almost all visible matter in the universe consists
                      of nucleons (i. e. protons and neutrons), which are also the
                      prime probes for new physics, be it in accelerator
                      experiments or dark matter and neutrino detectors. The
                      results will increase the precision of the relation between
                      experimental cross sections and decay rates and the
                      underlying fundamental theory, which describes interactions
                      on the quarks and gluon level rather than interactions with
                      the nucleons (which are composed of quarks and gluons). By
                      extending the study to so-called hyperons that contain
                      strange quarks, in addition to the up and down quarks of the
                      nucleon, at many different quark mass combinations, the
                      validity range of chiral perturbation theory (ChPT) and
                      quark flavour symmetry relations can be checked and low
                      energy constants predicted. The simulations are carried out
                      in N$_f$ = 2 + 1 QCD, neglecting the mass difference between
                      up and down quarks and the electric charges of the quarks.
                      We employ Coordinated Lattice Simulations (CLS) gauge
                      ensembles. These were generated in a Markov chain using the
                      hybrid Monte Carlo (HMC) algorithm with open boundary
                      conditions in time, on several European supercomputers
                      including JUWELS and JUQUEEN. The Wilson fermion
                      discretisation is used, with non-perturbative removal of
                      lattice spacing effects that are proportional to the lattice
                      constant (order $a$ improvement). The main computational
                      task in the analysis that is carried out on the Xeon-Phi
                      Booster module of JURECA of these gauge ensembles with
                      volumes ranging from 64 $\cdot$ 32$^3$ up to 192 $\cdot$
                      96$^3$ points, encompassing 1000–2000 configurations each,
                      is the multiple solution of sparse large linear systems with
                      a dimension of up to (2 $\cdot$ 10$^9$)2 complex variables.
                      This is achieved by an adaptive algebraic multigrid
                      algorithm. A novel stochastic method allows us to obtain
                      results for four different baryons and many momentum
                      combinations with little computational overhead, relative to
                      just computing the structure of the nucleon at a few
                      momenta.},
      month         = {Feb},
      date          = {2020-02-27},
      organization  = {NIC Symposium 2020, Jülich (Germany),
                       27 Feb 2020 - 28 Feb 2020},
      cin          = {NIC},
      cid          = {I:(DE-Juel1)NIC-20090406},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)8 / PUB:(DE-HGF)7},
      url          = {https://juser.fz-juelich.de/record/874412},
}