Gluon gravitational form factors of the nucleon and the pion from lattice QCD
Abstract
A future electron-ion collider will enable the gluon contributions to the gravitational form factors of the proton to be constrained experimentally for the first time. Here, the first calculation of these form factors from lattice quantum chromodynamics is presented. The calculations use a larger-than-physical value of the light quark mass corresponding to mπ ~ 450 MeV . All three form factors, which encode the momentum dependence of the lowest moment of the spin-independent gluon generalized parton distributions and are related to different components of the energy-momentum tensor, are resolved. In particular, the gluon D-term form factor, related to the pressure distribution inside the nucleon, is determined for the first time. The gluon contributions to the two gravitational form factors of the pion are also determined, and are compared to existing lattice determinations of the quark contributions to the gravitational form factors and to phenomenology.
- Authors:
- Publication Date:
- Research Org.:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1491778
- Alternate Identifier(s):
- OSTI ID: 1544130; OSTI ID: 1635361
- Grant/Contract Number:
- AC02-05CH11231; SC0010495; SC0018121; SC0011090
- Resource Type:
- Published Article
- Journal Name:
- Physical Review. D.
- Additional Journal Information:
- Journal Name: Physical Review. D. Journal Volume: 99 Journal Issue: 1; Journal ID: ISSN 2470-0010
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Shanahan, P. E., and Detmold, W. Gluon gravitational form factors of the nucleon and the pion from lattice QCD. United States: N. p., 2019.
Web. doi:10.1103/PhysRevD.99.014511.
Shanahan, P. E., & Detmold, W. Gluon gravitational form factors of the nucleon and the pion from lattice QCD. United States. https://doi.org/10.1103/PhysRevD.99.014511
Shanahan, P. E., and Detmold, W. Wed .
"Gluon gravitational form factors of the nucleon and the pion from lattice QCD". United States. https://doi.org/10.1103/PhysRevD.99.014511.
@article{osti_1491778,
title = {Gluon gravitational form factors of the nucleon and the pion from lattice QCD},
author = {Shanahan, P. E. and Detmold, W.},
abstractNote = {A future electron-ion collider will enable the gluon contributions to the gravitational form factors of the proton to be constrained experimentally for the first time. Here, the first calculation of these form factors from lattice quantum chromodynamics is presented. The calculations use a larger-than-physical value of the light quark mass corresponding to mπ ~ 450 MeV . All three form factors, which encode the momentum dependence of the lowest moment of the spin-independent gluon generalized parton distributions and are related to different components of the energy-momentum tensor, are resolved. In particular, the gluon D-term form factor, related to the pressure distribution inside the nucleon, is determined for the first time. The gluon contributions to the two gravitational form factors of the pion are also determined, and are compared to existing lattice determinations of the quark contributions to the gravitational form factors and to phenomenology.},
doi = {10.1103/PhysRevD.99.014511},
journal = {Physical Review. D.},
number = 1,
volume = 99,
place = {United States},
year = {Wed Jan 23 00:00:00 EST 2019},
month = {Wed Jan 23 00:00:00 EST 2019}
}
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