# The multiplicity dependence of inclusive $p_t$ spectra from p-p collisions at $\sqrt{s}$ = 200 GeV

Abstract : We report measurements of transverse momentum $p_t$ spectra for ten event multiplicity classes of p-p collisions at $\sqrt{s} = 200$ 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 $m_t$, 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 $y_t$.
Document type :
Journal articles

http://hal.in2p3.fr/in2p3-00092883
Contributor : Dominique Girod Connect in order to contact the contributor
Submitted on : Tuesday, September 12, 2006 - 2:39:48 PM
Last modification on : Wednesday, April 27, 2022 - 4:31:26 AM

### Citation

J. Adams, M. M. Aggarwal, Z. Ahammed, J. Amonett, B. D. Anderson, et al.. The multiplicity dependence of inclusive $p_t$ spectra from p-p collisions at $\sqrt{s}$ = 200 GeV. Physical Review D, American Physical Society, 2006, 74, pp.032006. ⟨10.1103/PhysRevD.74.032006⟩. ⟨in2p3-00092883⟩

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