Multiparton interactions with an x-dependent proton size

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Abstract

Theoretical arguments, supported by other indirect evidence, suggest that the wave function of high-x partons should be narrower than that of low-x ones. In this article, we present a modification to the variable impact parameter framework of PYTHIA 8 to model this effect. In particular, a Gaussian hadronic matter profile is introduced, with a width dependent on the x value of the constituent being probed. Results are compared against the default single-and double-Gaussian profiles, as well as an intermediate overlap function.

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Nyckelord

Originalspråkengelska
TidskriftJournal of High Energy Physics
Utgåva nummer5
StatusPublished - 2011
PublikationskategoriForskning
Peer review utfördJa