Multiplicity dependence of inclusive p_t spectra from p-p collisions at √s=200  GeV

Adams, J. and Planinić, Mirko and Poljak, Nikola and Zuo, J. X. (2006) Multiplicity dependence of inclusive p_t spectra from p-p collisions at √s=200  GeV. Physical Review D, 74 (3). pp. 32006-17. ISSN 1550-7998

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Abstract

We report measurements of transverse momentum p_t spectra for ten event multiplicity classes of p-p collisions at √s=200  GeV. By analyzing the multiplicity dependence we find that the spectrum shape can be decomposed into a part with amplitude proportional to multiplicity and described by a Lévy distribution on transverse mass mt, and a part with amplitude proportional to multiplicity squared and described by a Gaussian distribution on transverse rapidity y_t. The functional forms of the two parts are nearly independent of event multiplicity. The two parts can be identified with the soft and hard components of a two-component model of p-p collisions. This analysis then provides the first isolation of the hard component of the p_t spectrum as a distribution of simple form on y_t.

Item Type: Article
Keywords: quarks, gluons, and QCD in nuclei and nuclear processes
Date: August 2006
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2006) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 0119257
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 01 Jul 2014 13:08
Last Modified: 01 Jul 2014 13:08
URI: http://digre.pmf.unizg.hr/id/eprint/2376

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