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arXiv · 1203.4129

Production of two $c \bar c$ pairs in gluon-gluon scattering in high energy proton-proton collisions

Wolfgang Schäfer·Antoni Szczurek
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Abstract

We calculate cross sections for $g g \to Q \bar Q Q \bar Q$ in the high-energy approximation in the mixed (longitudinal momentum fraction, impact parameter) and momentum space representations. Besides the total cross section as a function of subsystem energy also differential distributions (in quark rapidity, transverse momentum, $Q Q$, $Q \bar Q$ invariant mass) are presented. The elementary cross section is used to calculate production of $(c \bar c) (c \bar c)$ in single-parton scattering (SPS) in proton-proton collisions. We present integrated cross section as a function of proton-proton center of mass energy as well as differential distribution in $M_{(c \bar c)(c \bar c)}$. The results are compared with corresponding results for double-parton scattering (DPS) discussed recently in the literature. We find that the considered SPS contribution to $(c \bar c)(c \bar c)$ production is at high energy ($\sqrt{s} >$ 5 TeV) much smaller than that for DPS contribution.

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Wolfgang Schäfer, Antoni Szczurek. 2012-03-19. Production of two $c \bar c$ pairs in gluon-gluon scattering in high energy proton-proton collisions. https://doi.org/10.1103/physrevd.85.094029

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