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Title: Mobius domain-wall fermions on gradient-flowed dynamical HISQ ensembles

Here, we report on salient features of a mixed lattice QCD action using valence M\"{o}bius domain-wall fermions solved on the dynamical $$N_f=2+1+1$$ HISQ ensembles generated by the MILC Collaboration. The approximate chiral symmetry properties of the valence fermions are shown to be significantly improved by utilizing the gradient-flow scheme to first smear the HISQ configurations. The greater numerical cost of the M\"{o}bius domain-wall inversions is mitigated by the highly efficient QUDA library optimized for NVIDIA GPU accelerated compute nodes. We have created an interface to this optimized QUDA solver in Chroma. We provide tuned parameters of the action and performance of QUDA using ensembles with the lattice spacings $$a \simeq \{0.15, 0.12, 0.09\}$$ fm and pion masses $$m_\pi \simeq \{310, 220,130\}$$ MeV. We have additionally generated two new ensembles with $$a\sim0.12$$ fm and $$m_\pi\sim\{400, 350\}$$ MeV. With a fixed flow-time of $$t_{gf}=1$$ in lattice units, the residual chiral symmetry breaking of the valence fermions is kept below 10\% of the light quark mass on all ensembles, $$m_{res} \lesssim 0.1\times m_l$$, with moderate values of the fifth dimension $$L_5$$ and a domain-wall height $$M_5 \leq 1.3$$. As a benchmark calculation, we perform a continuum, infinite volume, physical pion and kaon mass extrapolation of $$F_{K^\pm}/F_{\pi^\pm}$$ and demonstrate our results are independent of flow-time, and consistent with the FLAG determination of this quantity at the level of less than one standard deviation.
Authors:
 [1] ;  [2] ;  [3] ;  [4] ;  [5] ;  [3] ;  [6] ;  [7] ;  [8] ;  [9] ;  [10] ;  [11]
  1. Forschungszentrum Julich, Julich (Germany); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Univ. of Glasgow, Glasgow (United Kingdom); College of William and Mary, Williamsburg, VA (United States)
  3. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  4. NVIDIA Corp., Santa Clara, CA (United States)
  5. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  6. The State Univ. of New Jersey, Piscataway, NJ (United States)
  7. Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
  8. College of William and Mary, Williamsburg, VA (United States); Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
  9. Brookhaven National Lab. (BNL), Upton, NY (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  10. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); NVIDIA Corp., Santa Clara, CA (United States)
  11. NVIDIA Corp., Santa Clara, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Publication Date:
Report Number(s):
JLAB-THY-17-2503; DOE/OR/23177-4168; arXiv:1701.07559; LLNL-JRNL-719521; RBRC-1227; BNL-114865-2017-JAAM
Journal ID: ISSN 2470-0010; PRVDAQ
Grant/Contract Number:
PHY-1125915; AC05-00OR22725; AC52-07NA27344; AC05-06OR23177; AC02-05CH11231; FG02-04ER41302; SC00046548; SC0015376; KB0301052; SC0012704
Type:
Accepted Manuscript
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 96; Journal Issue: 5; Journal ID: ISSN 2470-0010
Publisher:
American Physical Society (APS)
Research Org:
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 73 NUCLEAR PHYSICS AND RADIATION PHYSICS
OSTI Identifier:
1425425
Alternate Identifier(s):
OSTI ID: 1394687; OSTI ID: 1395852; OSTI ID: 1413172; OSTI ID: 1425164