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Massless and massive photons within basis light-front quantization

Journal Article · · Physical Review. D.
We compute the structure function, transverse momentum dependent parton distributions (TMDs), and generalized parton distributions (GPDs) for the photon from the light-front quantum electrodynamics (QED) Hamiltonian, determined for its constituent bare photon and electron-positron Fock components within the basis light-front quantization framework. While the structure function and GPDs align well with expectations, some oscillatory behavior in the TMDs emerges as a finite-basis artifact. We also compute the GPD and the corresponding structure function for the longitudinal polarization mode of the massive photon. We further study the photon mass dependence of the calculated observables. After performing nonperturbative renormalization, we obtain a good quality description of the perturbative QED properties of the photon, as well as good agreement with the experimental data for the massless photon’s structure function.
Research Organization:
Iowa State Univ., Ames, IA (United States); Iowa State University, Ames, IA (United States); Univ. of California, Oakland, CA (United States)
Sponsoring Organization:
Central Funds Guiding the Local Science and Technology Development of Gansu Province; Chinese Academy of Sciences; National Natural Science Foundation of China; Natural Science Foundation of Gansu Province, China; USDOE; USDOE Office of Science (SC); USDOE Office of Science (SC), Basic Energy Sciences (BES). Scientific User Facilities (SUF)
Contributing Organization:
BLFQ Collaboration
Grant/Contract Number:
AC02-05CH11231; SC0023692; SC0023707
OSTI ID:
2228986
Alternate ID(s):
OSTI ID: 2579305
OSTI ID: 3006647
Journal Information:
Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 11 Vol. 108; ISSN 2470-0010; ISSN 2470-0029
Publisher:
American Physical Society (APS)Copyright Statement
Country of Publication:
United States
Language:
English

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