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Title: Tsallis Fits to p_T Spectra and Multiple Hard Scattering in pp Collisions at LHC

Abstract

Phenomenological Tsallis fits to the CMS, ATLAS, and ALICE transverse momentum spectra of hadrons for pp collisions at LHC were recently found to extend over a large range of the fitting transverse momentum. We investigate whether the few degrees of freedom in the Tsallis parametrization may arising from the relativistic parton-parton hard-scattering and related hard processes. The effects of multiple hard-scattering and parton showering on the power law are discussed. We find that although the transverse spectra of both hadrons and jets exhibit power-law behaviour of 1/pT^n at high pT, the power indices n for hadrons are categorically greater than those for jets, for which n~4.

Authors:
 [1];  [2]
  1. ORNL
  2. National Centre for Nuclear Research, Warsaw, Poland
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1082996
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Volume: 87; Journal Issue: 11; Journal ID: ISSN 1550--7998
Country of Publication:
United States
Language:
English

Citation Formats

Wong, Cheuk-Yin, and Wilk, Grzegorz. Tsallis Fits to p_T Spectra and Multiple Hard Scattering in pp Collisions at LHC. United States: N. p., 2013. Web. doi:10.1103/PhysRevD.87.114007.
Wong, Cheuk-Yin, & Wilk, Grzegorz. Tsallis Fits to p_T Spectra and Multiple Hard Scattering in pp Collisions at LHC. United States. https://doi.org/10.1103/PhysRevD.87.114007
Wong, Cheuk-Yin, and Wilk, Grzegorz. Tue . "Tsallis Fits to p_T Spectra and Multiple Hard Scattering in pp Collisions at LHC". United States. https://doi.org/10.1103/PhysRevD.87.114007.
@article{osti_1082996,
title = {Tsallis Fits to p_T Spectra and Multiple Hard Scattering in pp Collisions at LHC},
author = {Wong, Cheuk-Yin and Wilk, Grzegorz},
abstractNote = {Phenomenological Tsallis fits to the CMS, ATLAS, and ALICE transverse momentum spectra of hadrons for pp collisions at LHC were recently found to extend over a large range of the fitting transverse momentum. We investigate whether the few degrees of freedom in the Tsallis parametrization may arising from the relativistic parton-parton hard-scattering and related hard processes. The effects of multiple hard-scattering and parton showering on the power law are discussed. We find that although the transverse spectra of both hadrons and jets exhibit power-law behaviour of 1/pT^n at high pT, the power indices n for hadrons are categorically greater than those for jets, for which n~4.},
doi = {10.1103/PhysRevD.87.114007},
url = {https://www.osti.gov/biblio/1082996}, journal = {Physical Review D},
issn = {1550--7998},
number = 11,
volume = 87,
place = {United States},
year = {2013},
month = {1}
}