Pion gravitational form factors in the QCD instanton vacuum. II

Liu, Wei-Yang; Shuryak, Edward; Zahed, Ismail

doi:10.1103/physrevd.110.054022

Title: Pion gravitational form factors in the QCD instanton vacuum. II

Journal Article · 18 September 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.110.054022 · OSTI ID:2446993

^[1]; Shuryak, Edward ^[1]; Zahed, Ismail ^[1]

Stony Brook University, NY (United States)

We revisit the hard QCD contributions to the pion gravitational form factors, in terms of the twist-2,3 pion distribution amplitudes (DAs), including novel semihard contributions from the instantons. The pion DAs are evaluated in the QCD instanton vacuum and then properly evolved to higher resolution. The results are compared to our recent results from the QCD instanton vacuum, as well as Bethe-Salpeter calculations and recent lattice data. The interpolated hard and soft contributions to the pion D form factor are used to derive the (gravitational) pressure and shear within the pion, with a clear delineation of their range.

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Research Organization:: Stony Brook University, NY (United States)

Sponsoring Organization:: Office of science US Department of Energy; USDOE; USDOE Office of Science (SC), Nuclear Physics (NP)

Grant/Contract Number:: FG02-88ER40388; SC0023646

OSTI ID:: 2446993

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 5 Vol. 110; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Title: Pion gravitational form factors in the QCD instanton vacuum. II

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