Gravitational Form Factors of the Proton from Lattice QCD

Hackett, Daniel C.; Pefkou, Dimitra A.; Shanahan, Phiala E.

doi:10.1103/PhysRevLett.132.251904

Gravitational Form Factors of the Proton from Lattice QCD

Journal Article · Fri Jun 21 00:00:00 EDT 2024 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.132.251904· OSTI ID:2376241

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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 $0 \leq - t \leq 2 {GeV}^{2}$ . 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.

Published by the American Physical Society 2024

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Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: AC02-05CH11231; SC0011090; SC0021006; SC0023646; SC0023116; SC0004658; AC02-06CH11357; AC02-07CH11359

OSTI ID:: 2376241

Alternate ID(s):: OSTI ID: 2202851
OSTI ID: 2969753

Journal Information:: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 25 Vol. 132; ISSN 0031-9007; ISSN PRLTAO

Publisher:: American Physical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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