Gravitational Form Factors of the Proton from Lattice QCD

Oct 12, 2023
Published in:
  • Phys.Rev.Lett. 132 (2024) 25, 251904
  • Published: Jun 21, 2024
e-Print:
Report number:
  • MIT-CTP/5630,
  • FERMILAB-PUB-23-592-T

Citations per year

2023202420257385
Abstract: (APS)
The gravitational form factors (GFFs) of a hadron encode fundamental aspects of its structure, including its shape and size as defined from, e.g., its energy density. This Letter presents a determination of the flavor decomposition of the GFFs of the proton from lattice QCD, in the kinematic region 0-t2GeV2. The decomposition into up-, down-, strange-quark, and gluon contributions provides first-principles constraints on the role of each constituent in generating key proton structure observables, such as its mechanical radius, mass radius, and D term.
Note:
  • Version published in PRL
  • form factor: gravitation
  • p: form factor
  • hadron: form factor
  • energy: density
  • lattice field theory
  • structure
  • GeV
  • gluon
  • kinematics
  • flavor