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Multiplicity dependence of inclusive pt spectra from p-p collisions at s=200GeV
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SYSNO ASEP 0096778 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Ostatní články Title Multiplicity dependence of inclusive pt spectra from p-p collisions at s=200GeV Title Multiplicitní závislost inkluzivních pt-spekter ze srážek p-p při s=200GeV Author(s) Adams, J. (US)
Bielčík, J. (CZ)
Bielčíková, J. (CZ)
Bysterský, Michal (UJF-V)
Chaloupka, Petr (UJF-V) RIDSource Title Physical Review D: Particles, Fields, Gravitation and Cosmology. - : American Physical Society - ISSN 1550-7998
Roč. 74, č. 3 (2006), 032006-032006Number of pages 1 s. Language eng - English Country US - United States Keywords analysis ; spectrum Subject RIV BF - Elementary Particles and High Energy Physics R&D Projects GA202/04/0793 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10480505 - UJF-V (2005-2011) Annotation We report measurements of transverse momentum pt spectra for ten event multiplicity classes of p-p collisions at s=200GeV. 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 Lèvy distribution on transverse mass mt, and a part with amplitude proportional to multiplicity squared and described by a gaussian distribution on transverse rapidity yt. 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 $y_t$. Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2008
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