Photon structure studied at an electron ion collider

Chu, X.; Aschenauer, E. C.; Lee, J. H.; Zheng, L.

doi:10.1103/PhysRevD.96.074035

Photon structure studied at an electron ion collider

Journal Article · Mon Oct 30 00:00:00 EDT 2017 · Physical Review D

DOI:https://doi.org/10.1103/PhysRevD.96.074035· OSTI ID:1413939

Chu, X. ^[1]; Aschenauer, E. C. ^[2]; Lee, J. H. ^[2]; Zheng, L. ^[3]

Normal University, Wuhan (China). Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China; Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Brookhaven National Lab. (BNL), Upton, NY (United States). Dept. of Physics
Normal University, Wuhan (China). Key Laboratory of Quark and Lepton Physics (MOE) and Institute of Particle Physics, Central China

We report that a future electron ion collider (EIC) will be able to provide collisions of polarized electrons with protons and heavy ions over a wide range of center-of-mass energies (20 GeV to 140 GeV) at an instantaneous luminosity of 10³³ - 10³⁴cm^-2s^-1. One of its promising physics programs is the study of the partonic structure of quasireal photons. Measuring dijets in quasireal photoproduction events, one can effectively access the underlying parton dynamics of the photons. In this paper, we discuss the feasibility of tagging resolved photon processes and measuring the dijet cross section as a function of jet transverse momentum in the range of 0.01 < x$$rec\atop{γ}$$ < 1 at an EIC. Finally, it will be shown that both unpolarized and polarized parton distributions in the photon can be extracted, and that the flavor of the parton can be tagged at an EIC.

View Accepted Manuscript (DOE)

Research Organization:: Brookhaven National Laboratory (BNL), Upton, NY (United States)

Sponsoring Organization:: USDOE; USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)

Grant/Contract Number:: SC0012704

OSTI ID:: 1413939

Alternate ID(s):: OSTI ID: 1406139

Report Number(s):: BNL--114708-2017-JA; KB0202012

Journal Information:: Physical Review D, Journal Name: Physical Review D Journal Issue: 7 Vol. 96; ISSN PRVDAQ; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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