Preposition: in

• pomeron: Several options for the parametrization of the pomeron flux are available as well as different choices for the density of partons in the pomeron.

Adjective modifier

• collinear: Then the strong interacting particles experience additional radiation of soft or collinear partons described by means of the parton shower.

Modifies a noun

• density: A numerical agreement of better than ± 0.05 % of the parton densities has been achieved between five of the evolution programs.

• distribution: Oct 22nd Anders Edin A model for parton distributions in hadrons For recent publications see here.

• shower: Detailed discussion on kinematics of parton shower is presented in this paper.

• function: We are investigating the determination of the uncertainty of the proton parton density functions.

• level: Solution method: Monte Carlo techniques are used to produce the central exclusive parton level system.

• quark: This effect was most pronounced in the case of the initial parton quarks.

Noun used with modifier

• proton: We are investigating the determination of the uncertainty of the proton parton density functions.