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Title: The shape of the proton at high energies

We present first calculations of the fluctuating gluon distribution in a proton as a function of impact parameter and rapidity employing the functional Langevin form of the JIMWLK renormalization group equation. We demonstrate that when including effects of confinement by screening the long range Coulomb field of the color charges, the evolution is unitary. The large-x structure of the proton, characterized by the position of three valence quarks, retains an effect on the proton shape down to very small values of x. We determine the dipole scattering amplitude as a function of impact parameter and dipole size and extract the rapidity evolution of the saturation scale and the proton radius.
Authors:
 [1] ;  [1]
  1. Brookhaven National Laboratory (BNL), Upton, NY (United States)
Publication Date:
Report Number(s):
BNL-107948-2015-JA
Journal ID: ISSN 0370-2693; R&D Project: KB0301020; KB0301020
Grant/Contract Number:
SC00112704; AC02-05CH11231; AC02-98CH10886
Type:
Published Article
Journal Name:
Physics Letters. Section B
Additional Journal Information:
Journal Volume: 739; Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Nuclear Physics (NP) (SC-26)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; proton
OSTI Identifier:
1197752
Alternate Identifier(s):
OSTI ID: 1183840