Color fluctuation approximation for multiple interactions in leading twist theory of nuclear shadowing

Journal Article · Thu Apr 01 04:00:00 EDT 2010 · Physics Letters B

DOI:https://doi.org/10.1016/j.physletb.2010.03.008· OSTI ID:977102

Vadim Guzey, Mark Strikman

The leading twist theory of nuclear shadowing predicts nuclear parton distributions in the small $$x$$ shadowing region by connecting them to the leading twist hard diffraction in electron-nucleon scattering. The uncertainties of the predictions are related to the shadowing effects resulting from the interaction of the hard probe with $$N \ge 3$$ nucleons. We argue that the pattern of hard diffraction observed at HERA allows one to reduce these uncertainties, and we develop a new approach to the treatment of these multiple collisions. It is based on the concept of the color fluctuations and accounts for the presence of both point-like and hadron-like configurations in the virtual photon. Using the developed framework, we update our predictions for the effect of the leading twist nuclear shadowing in nuclear parton distributions of heavy nuclei at small $$x$$.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States)
• Sponsoring Organization: USDOE Office of Energy Research (ER)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 977102
• Report Number(s): JLAB-THY-09-1048; DOE/OR/23177-0948
• Journal Information: Physics Letters B, Journal Name: Physics Letters B Vol. 687
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
APPROXIMATIONS
COLOR
DIFFRACTION
FLUCTUATIONS
HEAVY NUCLEI
NUCLEONS
PROBES
SCATTERING