Perturbative QCD correlations in multi-parton collisions

The European Physical Journal C

Yu. Dokshitzer¹  B. Blok²  M. Strikman³  L. Frankfurt⁴ 

[1] CNRS, LPTHE, University Pierre et Marie Curie, UMR 7589, Paris, France;St. Petersburg Nuclear Physics Institute, Gatchina, Russia;Department of Physics, Technion-Israel Institute of Technology, Haifa, Israel;Physics Department, Penn State University, University Park, PA, USA;School of Physics and Astronomy, Tel Aviv University, Tel Aviv, Israel;

关键词: Transverse Momentum;    Integrate Cross Section;    Hard Interaction;    Longitudinal Momentum Fraction;    Collinear Approximation;   

DOI  :  10.1140/epjc/s10052-014-2926-z

来源: Springer

【 摘 要 】

We examine the role played in double-parton interactions (DPI) by the parton–parton correlations originating from perturbative QCD parton splittings. Also presented are the results of the numerical analysis of the integrated DPI cross sections at Tevatron and LHC energies. To obtain the numerical results the knowledge of the single-parton GPDs gained by the HERA experiments was used to construct the non-perturbative input for generalized double-parton distributions. The perturbative two-parton correlations induced by three-parton interactions contribute significantly to a resolution of the longstanding puzzle of an excess of multi-jet production events in the back-to-back kinematics observed at the Tevatron.

【 授权许可】

CC BY