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openQ*D code: a versatile tool for QCD+QED simulations
/ Campos, Isabel (Cantabria Inst. of Phys.) ; Fritzsch, Patrick (CERN) ; Hansen, Martin (INFN, Rome) ; Marinkovic, Marina Krstic (TCD, Dublin) ; Patella, Agostino (Humboldt U., Berlin) ; Ramos, Alberto (TCD, Dublin) ; Tantalo, Nazario (Rome U., Tor Vergata ; INFN, Rome)
/RC* Collaboration
We present the open-source package openQ*D-1.0, which has been primarily, but not uniquely, designed to perform lattice simulations of QCD+QED and QCD, with and without C* boundary conditions, and O(a) improved Wilson fermions. The use of C* boundary conditions in the spatial direction allows for a local and gauge-invariant formulation of QCD+QED in finite volume, and provides a theoretically clean setup to calculate isospin-breaking and radiative corrections to hadronic observables from first principles. [...]
arXiv:1908.11673; CERN-TH-2019-136.-
2020-03-03 - 41 p.
- Published in : Eur. Phys. J. C 80 (2020) 195
Article from SCOAP3: 88551ccc8063f247b799c8063ae2ca02 - PDFPDFA; scoap3-fulltext - PDF; scoap - PDF; Fulltext: PDF; External link: Article from SCOAP3
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How perturbative are heavy sea quarks?
/ Athenodorou, Andreas (Cyprus U. ; Cyprus Inst.) ; Finkenrath, Jacob (Cyprus Inst.) ; Knechtli, Francesco (Wuppertal U.) ; Korzec, Tomasz (Wuppertal U.) ; Leder, Björn (Humboldt U., Berlin) ; Krstić Marinković, Marina (Trinity Coll., Dublin) ; Sommer, Rainer (Julich, NIC ; Humboldt U., Berlin)
/ALPHA Collaboration
Effects of heavy sea quarks on the low energy physics are described by an effective theory where the expansion parameter is the inverse quark mass, 1/$M$. At leading order in 1/$M$ (and neglecting light quark masses) the dependence of any low energy quantity on $M$ is given in terms of the ratio of $\Lambda$ parameters of the effective and the fundamental theory. [...]
arXiv:1809.03383; DESY 18-134; HU-EP-18/28; WUB/18-03; DESY-18-134; HU-EP-18-28; WUB-18-03.-
2019-06 - 38 p.
- Published in : Nucl. Phys. B 943 (2019) 114612
Article from SCOAP3: PDF; Fulltext: PDF;
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openQ*D simulation code for QCD+QED
/ Campos, Isabel (Madrid, IFT ; Cantabria Inst. of Phys.) ; Fritzsch, Patrick (CERN) ; Hansen, Martin (Southern Denmark U., CP3-Origins) ; Marinković, Marina Krstić (CERN ; Trinity Coll., Dublin) ; Patella, Agostino (CERN ; Plymouth U., Math. Stat. Dept.) ; Ramos, Alberto (CERN) ; Tantalo, Nazario (Rome U., Tor Vergata ; INFN, Rome2)
The openQ*D code for the simulation of QCD+QED with C$^\star$ boundary conditions is presented. This code is based on openQCD-1.6, from which it inherits the core features that ensure its efficiency: the locally-deflated SAP-preconditioned GCR solver, the twisted-mass frequency splitting of the fermion action, the multilevel integrator, the 4th order OMF integrator, the SSE/AVX intrinsics, etc. [...]
arXiv:1710.08839; CERN-TH-2017-217.-
2018 - 16 p.
- Published in : EPJ Web Conf. 175 (2018) 09005
Fulltext: arXiv:1710.08839 - PDF; epjconf_lattice2018_09005 - PDF;
In : 35th International Symposium on Lattice Field Theory, Granada, Spain, 18 - 24 Jun 2017, pp.09005
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Computing the muon anomalous magnetic moment using the hybrid method with physical quark masses
/ Spraggs, Matthew (Southampton U.) ; Boyle, Peter A (Edinburgh U.) ; Del Debbio, Luigi (Edinburgh U.) ; Izubuchi, Taku (Brookhaven ; RIKEN BNL) ; Jüttner, Andreas (Southampton U.) ; Lehner, Christoph (Brookhaven) ; Maltman, Kim (York U., Canada ; U. Adelaide, Sch. Math. Sci.) ; Marinkovic, Marina Krstic (CERN) ; Portelli, Antonin (Southampton U. ; Edinburgh U.)
I present our work on the leading strange quark-connected contribution to the muon anomalous magnetic moment using RBC/UKQCD physical point domain wall fermion ensembles. I also present preliminary results of a computation of the light quark-connected contribution using a similar approach..
SISSA, 2016 - 7 p.
- Published in : PoS LATTICE2016 (2016) 184
Fulltext: PDF; External link: PoS server
In : 34th International Symposium on Lattice Field Theory, Southampton, UK, 24 - 30 Jul 2016, pp.184
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The strange contribution to $a_{\mu}$ with physical quark masses using Möbius domain wall fermions
/ Spraggs, Matt (Southampton U.) ; Boyle, Peter (Edinburgh U.) ; Del Debbio, Luigi (Edinburgh U.) ; Jüttner, Andreas (Southampton U.) ; Lehner, Christoph (Brookhaven) ; Maltman, Kim (Adelaide U. ; York U., Canada) ; Marinkovic, Marina (CERN) ; Portelli, Antonin (Southampton U. ; Brookhaven)
We present preliminary results for the strange leading-order hadronic contribution to the anomalous magnetic moment of the muon using RBC/UKQCD physical point domain wall fermions ensembles. We discuss various analysis strategies in order to constrain the systematic uncertainty in the final result..
arXiv:1601.00537.-
SISSA, 2016-06-23 - 7 p.
- Published in : PoS: LATTICE2015 (2016) , pp. 106
Fulltext: arXiv:1601.00537 - PDF; PoS(LATTICE 2015)106 - PDF; External link: Preprint
In : 33rd International Symposium on Lattice Field Theory, Kobe, Japan, 14 - 18 Jul 2015, pp.106
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Improved lattice fermion action for heavy quarks
/ Cho, Yong-Gwi (Tsukuba U., GSPAS) ; Hashimoto, Shoji (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) ; Jüttner, Andreas (Southampton U.) ; Kaneko, Takashi (KEK, Tsukuba ; Tsukuba, Graduate U. Adv. Studies) ; Marinkovic, Marina (CERN ; Southampton U.) ; Noaki, Jun-Ichi (KEK, Tsukuba) ; Tsang, Justus Tobias (Southampton U.)
We develop an improved lattice action for heavy quarks based on Brillouin-type fermions, that have excellent energy-momentum dispersion relation. The leading discretization errors of $O(a)$ and $O(a^2)$ are eliminated at tree-level. [...]
arXiv:1504.01630; UTHEP-673; KEK-CP-321; CERN-PH-TH-2015-074; CERN-PH-TH-2015-074.-
Geneva : CERN, 2015-05-14 - 33 p.
- Published in : JHEP 05 (2015) 072
Article from SCOAP3: PDF; Fulltext: PDF; Springer Open Access article: PDF; External link: Preprint
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