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Title: Possible Implication of a Single Nonextensive p_T Distribution for Hadron Production in High-Energy pp Collisions

Multiparticle production processes in $pp$ collisions at the central rapidity region are usually considered to be divided into independent "soft" and "hard" components. The first is described by exponential (thermal-like) transverse momentum spectra in the low-$$p_T$$ region with a scale parameter $T$ associated with the temperature of the hadronizing system. The second is governed by a power-like distributions of transverse momenta with power index $n$ at high-$$p_T$$ associated with the hard scattering between partons. We show that the hard-scattering integral can be approximated as a nonextensive distribution of a quasi-power-law containing a scale parameter $T$ and a power index $n=1/(q -1)$, where $q$ is the nonextensivity parameter. We demonstrate that the whole region of transverse momenta presently measurable at LHC experiments at central rapidity (in which the observed cross sections varies by $14$ orders of magnitude down to the low $$p_T$$ region) can be adequately described by a single nonextensive distribution. These results suggest the dominance of the hard-scattering hadron-production process and the approximate validity of a ``no-hair" statistical-mechanical description of the $$p_T$$ spectra for the whole $$p_T$$ region at central rapidity for $pp$ collisions at high-energies.
Authors:
 [1] ;  [2] ;  [3] ;  [4]
  1. ORNL
  2. National Centre for Nuclear Research, Warsaw, Poland
  3. Centro Brasileiro de Pesquisas FĂ­sicas (CBPF), Brazil
  4. Centro Brasileiro de Pesquisas Fisicas, Brazil
Publication Date:
OSTI Identifier:
1185827
DOE Contract Number:
DE-AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Conference: XLIV International Symposium on Multiparticle Dynamics, Bologna, Italy, 20140908, 20140912
Research Org:
Oak Ridge National Laboratory (ORNL)
Sponsoring Org:
SC USDOE - Office of Science (SC)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS