Relativistic Hard-Scattering and Tsallis Fits to pT Spectra in pp Collisions at the LHC

Conference · Sun Sep 01 00:00:00 EDT 2013

OSTI ID:1570921

Wong, Cheuk-Yin ^[1]; Wilk, Grzegorz ^[2]

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1. ORNL
2. National Centre for Nuclear Research, Warsaw, Poland

Motivated by the good Tsallis fits to the high-pT spectra in pp collisions at the LHC, we study the relativistic hard-scattering model and obtain an approximate analytical expression for the differential hard-scattering cross section at \eta~0. The power-law behavior of the transverse spectra, in the form of d\sigma/ dpT^2 ~ 1/pT^n, gives a power index n in the range of 4.5-5.5 for jet production as predicted by pQCD, after the dependencies of the structure functions and the running coupling constant are properly taken into account. The power indices for hadron production n are slightly greater than those for jet production.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1570921
• Resource Relation: Conference: International Workshop on Low-x Physics (Low-x 2013) - Rehotvot and Eilat, , Israel - 5/30/2013 4:00:00 AM-6/4/2013 4:00:00 AM
• Country of Publication: United States
• Language: English