Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Adam Freese"'
Publikováno v:
Physics Letters B, Vol 857, Iss , Pp 138999- (2024)
In the Standard Model of particle physics, the axial current is not conserved, due both to fermion masses and to the axial anomaly. Using perturbative quantum chromodynamics, we calculate matrix elements of the local and non-local axial current for a
Externí odkaz:
https://doaj.org/article/e8b2504a3b634de8b59bc2c5f87bac84
Publikováno v:
Physics Letters B, Vol 839, Iss , Pp 137768- (2023)
We calculate the gravitational form factors of the electron at one loop in quantum electrodynamics, decomposing these into contributions from the electron and photon parts of the energy momentum tensor. Ultraviolet divergences are removed through ren
Externí odkaz:
https://doaj.org/article/06bd12002fec458aa4f9451c335c97c0
Publikováno v:
Physics Letters B, Vol 823, Iss , Pp 136719- (2021)
Gluon dressing of the light quarks within hadrons is very strong and extremely important in that it dynamically generates most of the observable mass through the breaking of chiral symmetry. The quark and gluon parton densities, q(x) and g(x), are ne
Externí odkaz:
https://doaj.org/article/4f077e0ebd7a4470ae1dc7d792320931
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 79, Iss 6, Pp 1-14 (2019)
Abstract We provide the complete decomposition of the local gauge-invariant energy-momentum tensor for spin-1 hadrons, including non-conserved terms for the individual parton flavors and antisymmetric contributions originating from intrinsic spin. We
Externí odkaz:
https://doaj.org/article/7e843f355c0e4927922e7592405abac4
Autor:
Adam Freese, Gerald A. Miller
Publikováno v:
Physical Review
We clarify the physical origin and meaning of the two-dimensional relativistic densities of the light front formalism. The densities are shown to originate entirely from the use of light front time instead of instant form time, which physically corre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f884e8698839fb0a54fdc2fb5addcda4
http://arxiv.org/abs/2302.09171
http://arxiv.org/abs/2302.09171
Autor:
Adam Freese, Gerald A. Miller
Publikováno v:
Physical Review
We obtain the energy-momentum tensor (EMT) in the 't Hooft model of two-dimensional quantum chromodynamics. The EMT is decomposed into contributions from quark and gluon fields, with all of the (plus component of) the light front momentum being carri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::686bf3475963bea0d850133a45eef63f
http://repo.scoap3.org/api
http://repo.scoap3.org/api
Autor:
Adam Freese
Publikováno v:
Physical Review
Noether's first and second theorems both imply conserved currents that can be identified as an energy-momentum tensor (EMT). The first theorem identifies the EMT as the conserved current associated with global spacetime translations, while the second
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8654a0a63fcad738a77687f30e0d107
https://doi.org/10.1103/physrevd.106.125012
https://doi.org/10.1103/physrevd.106.125012
Publikováno v:
Physics Letters
We calculate the gravitational form factors of the electron at one loop in quantum electrodynamics, decomposing these into contributions from the electron and photon parts of the energy-momentum tensor. Ultraviolet divergences are removed through ren
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::974de4262eaf70a2673413548c19df58
http://arxiv.org/abs/2212.12197
http://arxiv.org/abs/2212.12197
Autor:
Adam Freese, Wim Cosyn
Publikováno v:
Physical Review
Densities associated with the energy-momentum tensor are calculated for spin-one targets. These calculations are done in a light front formalism, which accounts for relativistic effects due to boosts and allows for arbitrary spatial localization of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1ffc02d3622cef38e626531bee5f319d
https://doi.org/10.1103/physrevd.106.114013
https://doi.org/10.1103/physrevd.106.114013
Autor:
Adam Freese, Ian C. Cloët
Publikováno v:
Physical Review C. 105
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::871dbbbc3214b557ba0e60887dba3213
https://doi.org/10.1103/physrevc.105.059901
https://doi.org/10.1103/physrevc.105.059901