Lattice gauge theory for physics beyond the Standard Model

Abstract

This document is one of a series of white papers from the USQCD Collaboration. Here, we discuss opportunities for lattice field theory research to make an impact on models of new physics beyond the Standard Model, including composite Higgs, composite dark matter, and supersymmetric theories.

Lattice QCD and neutrino-nucleus scattering

“…For the full energy range of LBNF/DUNE, it will be necessary to trace out the full q 2 A from dipole fits are underestimated and the two small lattice-QCD error bars stem from incomplete error analyses (critiqued below). The references for r 2 A from top to bottom are as follows: "νd and eN → eN π (dipole)" [50], "νd (z exp.)" [58], "MuCap this work" [59], LHPC [62] (NB: one lattice spacing and M π = 317 MeV), ETMC [63] (NB: no strange sea and a small volume such that M π L < 3), CLS [64], PNDME [65].…”

Status and future perspectives for lattice gauge theory calculations to the exascale and beyond

“…We have determined that, with access to exascale computing resources, we can determine many of the strong-interaction physics quantities that are important to the DOE missions in nuclear physics and in high-energy physics with the required precision. Indeed, that is the focus of this and the companion whitepapers [1][2][3][4][5][6]. That said, we have also determined that there are other important physics quantities that will not be able to be determined with sufficient precision, even with access to exascale computing resources or beyond.…”

“…In 2018, the USQCD collaborations Executive Committee organized several subcommittees to recognize future opportunities and formulate possible goals for lattice field theory calculations in several physics areas. The conclusions of these studies, along with community input, are presented in seven whitepapers [1][2][3][4][5][6][7].…”

“…We also consider rapidly developing new areas of computation such as machine learning (ML) and Big Data approaches and quantum computing. We refer the reader to the companion whitepapers for details of research opportunities in various areas of nuclear and high energy physics [1][2][3][4][5][6].…”

Exascale applications: skin in the game

“…The advance to exascale capability over the coming decade offers exciting opportunities for ground-breaking discoveries in high-energy and nuclear physics. Exascale computing has the potential to realistically simulate the atomic nucleus and to discover the first harbingers of new laws of nature [11,12,13], revealing a deeper theory which underlies the present 'elementary' particles [14]. These possibilities can be achieved if new and impending advances in computer science via the ECP can be harnessed to provide a software framework that allows lattice QCD applications to efficiently exploit exascale architectures and application scientists to refine that application as new challenges and ideas emerge.…”