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arXiv · 1612.05582

Triple parton scatterings in high-energy proton-proton collisions

David d'Enterria·Alexander M. Snigirev
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Abstract

A generic expression to compute triple parton scattering (TPS) cross sections in high-energy proton-proton (pp) collisions is presented as a function of the corresponding single-parton cross sections and the transverse parton distribution in the proton encoded in an effective parameter $σ_{\rm eff,TPS}$. The value of $σ_{\rm eff,TPS}$ is closely related to the similar effective cross section that characterizes double-parton scatterings, and amounts to $σ_{\rm eff,TPS} = 12.5 \pm 4.5$ mb. Estimates for triple charm ($\rm c\overline{c}$) and bottom ($\rm b\overline{b}$) production in pp collisions at LHC and FCC energies are presented based on next-to-next-to-leading order perturbative calculations for single $\rm c\overline{c},\rm b\overline{b}$ cross sections. At $\sqrt{s}\approx$ 100 TeV, about 15% of the pp collisions produce three $\rm c\overline{c}$ pairs from three different parton-parton scatterings.

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David d'Enterria, Alexander M. Snigirev. 2016-12-16. Triple parton scatterings in high-energy proton-proton collisions. https://doi.org/10.1103/physrevlett.118.122001

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