2019 USQCD All-Hands Collaboration Meeting

Session

Poster Session w/ Coffee

Apr 26, 2019, 3:30 PM

Large Seminar Room (BNL Physics Department)

60. Step scaling functions for N_f=12 and 10 with Moebius Domain Wall fermions

Claudio Rebbi (Boston University)

4/26/19, 3:30 PM

We perform numerical simulations to determine the discrete beta-function for an SU(3) system with 10 and 12 fundamental flavors using stout-smeared Moebius domain-wall fermions. Project by Anna Hasenfratz, Claudio Rebbi, Oliver Witzel.

59. Investigation of near-conformal anomalous dimensions using gradient-flow RG

Anna Hasenfratz (UColorado Boulder)

4/26/19, 3:35 PM

As the number of fermion degrees of freedom in a gauge theory increases, a phase
transition is known to occur to an infrared-conformal phase lacking confinement and
chiral symmetry breaking. Uncovering the nature of this transition and the properties
of the non-trivial four-dimensional CFTs occurring inside the “conformal window” is a
long-standing and active research question in lattice gauge...

58. Grid QCD code: performance portability

Meifeng Lin (Brookhaven National Laboratory)

4/26/19, 3:40 PM

This is a poster presented at the Annual ECP meeting in January, 2019. It summarizes the progress of porting Grid to GPUs.

57. Higgs-Yukawa model with reduced staggered fermions

Nouman Butt (Syracuse University)

4/26/19, 3:45 PM

We explore the phase structure of a four dimensional $SO(4)$ invariant lattice Higgs-Yukawa model comprising four reduced staggered fermions interacting with a real scalar field.The fermions belong to the fundamental
representation of the symmetry group while the three scalar field components transform in the self-dual representation of $SO(4)$. The model is a generalization of a four fermion...

56. Neutrino Nucleon Scattering and Hadronic Tensor

Jian Liang (University of Kentucky)

4/26/19, 3:50 PM

The direct lattice calculation of hadronic tenor is helpful to the neutrino-nucleus scatterings in all the elastic, resonance and shallow inelastic scattering (SIS) regions. In this poster, we will briefly introduce the framework of calculating hadronic tenor on the lattice. Preliminary numerical results show that fine lattice spacings are crucial to our calculation.

55. Nucleon Mass with All-HISQ Fermions

Aaron Meyer (Brookhaven National Lab)

4/26/19, 3:55 PM

54. Nim metaprogramming for performance, portability, and productivity

Xiao-Yong Jin (RIKEN Advanced Institute for Computational Science)

4/26/19, 4:00 PM

The Nim programming language has an extensive metaprogramming capability. With the help of Nim's AST-based metaprogramming, we are building a framework where the application code is as high-level as in Python, and the low-level architecture specific code is compartmentalized. This allows us to target OpenMP, CUDA, and OpenCL for supported architectures. Here we describe our ongoing process of...

53. Semileptonic B- and D-meson form factors on the (2+1+1)-flavor HISQ ensembles

Zechariah Gelzer (University of Illinois at Urbana--Champaign)

4/26/19, 4:05 PM

52. Strong coupling constant and heavy quark masses in (2+1) flavor QCD

Johannes Heinrich Weber (Technische Universität München)

4/26/19, 4:10 PM

I present a determination of the strong coupling constant and heavy quark masses in (2+1)-flavor QCD using lattice calculations of the moments of the pseudo-scalar quarkonium correlators at several values of the heavy valence quark mass with Highly Improved Staggered Quark (HISQ) action.
I determine the strong coupling constant in MSbar scheme at four low energy scales corresponding to m,...