# Possible Implication of a Single Nonextensive p(T) Distribution for Hadron Production in High-Energy pp Collisions

## Abstract

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:

- ORNL
- National Centre for Nuclear Research, Warsaw, Poland
- Centro Brasileiro de Pesquisas Fisicas (CBPF), Brazil

- Publication Date:

- Research Org.:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

- Sponsoring Org.:
- USDOE

- OSTI Identifier:
- 1336586

- DOE Contract Number:
- AC05-00OR22725

- Resource Type:
- Conference

- Resource Relation:
- Conference: XLIV International Symposium on Multiparticle Dynamics (ISMD 2014), Bologna, Italy, 20140908, 20140912

- Country of Publication:
- United States

- Language:
- English

### Citation Formats

```
Wong, Cheuk-Yin, Wilk, Grzegorz, Cirto, Leonardo J. L., and Tsallis, Constantino.
```*Possible Implication of a Single Nonextensive p(T) Distribution for Hadron Production in High-Energy pp Collisions*. United States: N. p., 2015.
Web.

```
Wong, Cheuk-Yin, Wilk, Grzegorz, Cirto, Leonardo J. L., & Tsallis, Constantino.
```*Possible Implication of a Single Nonextensive p(T) Distribution for Hadron Production in High-Energy pp Collisions*. United States.

```
Wong, Cheuk-Yin, Wilk, Grzegorz, Cirto, Leonardo J. L., and Tsallis, Constantino. Thu .
"Possible Implication of a Single Nonextensive p(T) Distribution for Hadron Production in High-Energy pp Collisions". United States.
doi:. https://www.osti.gov/servlets/purl/1336586.
```

```
@article{osti_1336586,
```

title = {Possible Implication of a Single Nonextensive p(T) Distribution for Hadron Production in High-Energy pp Collisions},

author = {Wong, Cheuk-Yin and Wilk, Grzegorz and Cirto, Leonardo J. L. and Tsallis, Constantino},

abstractNote = {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.},

doi = {},

journal = {},

number = ,

volume = ,

place = {United States},

year = {Thu Jan 01 00:00:00 EST 2015},

month = {Thu Jan 01 00:00:00 EST 2015}

}