Non-relativistic QCD Study of Excited Bottomonia at Finite Temperatures on a Fine Lattice
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73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
Engineering topics
Meinel, Stefan
Publications and source records attributed to Meinel, Stefan.
Transverse momentum-dependent parton distributions for longitudinally polarized nucleons from domain wall fermion calculations at the physical pion mass
Previous Lattice QCD calculations of nucleon transverse momentum-dependent parton distribu?tions (TMDs) focused on the case of transversely polarized nucleons, and thus did not encompass two leading-twist TMDs associated with longitudinal polarization, namely, the helicity TMD and the worm-gear TMD corresponding to transversely polarized quarks in a longitudinally polarized nucleon. Based on a definition of TMDs via hadronic matrix elements of quark bilocal operators containing staple-shaped gauge connections, TMD observables characterizing the aforementioned two TMDs are evaluated, utilizing an RBC/UKQCD domain wall fermion ensemble at the physical pion mass.
Engelhardt, Michael↗
P -wave nucleon-pion scattering amplitude in the Δ ( 1232 ) channel from lattice QCD
Not Available
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Low-energy pion-nucleon scattering and the Δ resonance in lattice QCD
We report on our investigation of low-energy pion-nucleon scattering from lattice QCD with Wilson type fermions. Our focus is on the isospin I = 3/2 channel, which couples to the Delta resonance. We discuss our calculations aiming at the extraction of the Delta resonance mass, width and effective coupling at pion mass 250 MeV, using the Lüscher finite-volume method to extract the phase shift δ J=3/2,l=1 .
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Excited bottomonia in quark-gluon plasma from lattice QCD
Not Available
73 NUCLEAR PHYSICS AND RADIATION PHYSICS↗
Opportunities for Lattice QCD in quark and lepton flavor physics
This document is one of a series of white papers from the USQCD Collaboration. Here, we discuss opportunities for Lattice QCD in quark and lepton flavor physics. New data generated at Belle II, LHCb, BES III, NA62, KOTO, and Fermilab E989, combined with precise calculations of the relevant hadronic physics, may reveal what lies beyond the Standard Model. We outline a path toward improvements of the precision of existing Lattice QCD calculations and discuss groundbreaking new methods that allow Lattice QCD to access new observables.
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS↗
Hadrons and nuclei
In 2018, the USQCD Collaboration’s 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 white papers. Here, we discuss opportunities for lattice QCD calculations related to the structure and spectroscopy of hadrons and nuclei. An overview of recent lattice calculations of the structure of the proton and other hadrons is presented along with prospects for future extensions. Progress and prospects of hadronic spectroscopy and the study of resonances in the light, strange and heavy quark sectors are summarized. In conclusion recent advances in the study of light nuclei from lattice QCD are addressed and the scope of future investigations that are currently envisioned is outlined.
74 ATOMIC AND MOLECULAR PHYSICS↗