Gluon gravitational form factors of the nucleon and the pion from lattice QCD
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-th...
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| Format: | Article |
| Language: | English |
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American Physical Society
2019
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| Online Access: | http://hdl.handle.net/1721.1/120119 https://orcid.org/0000-0002-0400-8363 |
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| author | Shanahan, Phiala E Detmold, William |
| author2 | Massachusetts Institute of Technology. Center for Theoretical Physics |
| author_facet | Massachusetts Institute of Technology. Center for Theoretical Physics Shanahan, Phiala E Detmold, William |
| author_sort | Shanahan, Phiala E |
| collection | MIT |
| description | 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 m[subscript π]∼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. |
| first_indexed | 2024-09-23T11:50:19Z |
| format | Article |
| id | mit-1721.1/120119 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:50:19Z |
| publishDate | 2019 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/1201192022-10-01T06:23:32Z Gluon gravitational form factors of the nucleon and the pion from lattice QCD Shanahan, Phiala E Detmold, William Massachusetts Institute of Technology. Center for Theoretical Physics Massachusetts Institute of Technology. Department of Physics Shanahan, Phiala E Detmold, William 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 m[subscript π]∼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. National Science Foundation (U.S.) (Grant 1841699) United States. Department of Energy (Award DE-SC0010495) United States. Department of Energy (Grant DE-SC0011090) 2019-01-23T21:06:04Z 2019-01-23T21:06:04Z 2019-01 2018-10 2019-01-23T18:00:33Z Article http://purl.org/eprint/type/JournalArticle 2470-0010 2470-0029 http://hdl.handle.net/1721.1/120119 Shanahan, P. E. and W. Detmold. "Gluon gravitational form factors of the nucleon and the pion from lattice QCD." Physical Review D 99, 1 (January 2019): 014511 https://orcid.org/0000-0002-0400-8363 en http://dx.doi.org/10.1103/PhysRevD.99.014511 Physical Review D Creative Commons Attribution http://creativecommons.org/licenses/by/3.0 application/pdf American Physical Society American Physical Society |
| spellingShingle | Shanahan, Phiala E Detmold, William Gluon gravitational form factors of the nucleon and the pion from lattice QCD |
| title | Gluon gravitational form factors of the nucleon and the pion from lattice QCD |
| title_full | Gluon gravitational form factors of the nucleon and the pion from lattice QCD |
| title_fullStr | Gluon gravitational form factors of the nucleon and the pion from lattice QCD |
| title_full_unstemmed | Gluon gravitational form factors of the nucleon and the pion from lattice QCD |
| title_short | Gluon gravitational form factors of the nucleon and the pion from lattice QCD |
| title_sort | gluon gravitational form factors of the nucleon and the pion from lattice qcd |
| url | http://hdl.handle.net/1721.1/120119 https://orcid.org/0000-0002-0400-8363 |
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