Possible Implication of a Single Nonextensive p_T Distribution for Hadron Production in High-Energy pp Collisions
- ORNL
- National Centre for Nuclear Research, Warsaw, Poland
- Centro Brasileiro de Pesquisas Físicas (CBPF), Brazil
- Centro Brasileiro de Pesquisas Fisicas, Brazil
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.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC05-00OR22725
- OSTI ID:
- 1185827
- Resource Relation:
- Conference: XLIV International Symposium on Multiparticle Dynamics, Bologna, Italy, 20140908, 20140912
- Country of Publication:
- United States
- Language:
- English
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