Final-state interaction as the origin of the cronin effect

The Cronin effect that refers to the enhancement of hadron spectra at intermediate p(T) with increasing A in pA collisions is traditionally explained in terms of the broadening of the parton transverse momentum in the initial state. We show that recent data on the nuclear modification factor at eta=...

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Veröffentlicht in:	Physical review letters 2004-08, Vol.93 (8), p.082302.1-082302.4, Article 082302
Hauptverfasser:	HWA, Rudolph C, YANG, C. B
Format:	Artikel
Sprache:	eng
Schlagworte:	Exact sciences and technology Nuclear physics Nuclear reactions: general Nuclear reactions: specific reactions Physics Quarks, gluons, and qcd in nuclei and nuclear processes Relativistic heavy-ion reactions (collisions induced by light ions studied to calibrate relativistic heavy ion collisions, should be classified under both 001b20e75 and the 001b10c ou 001b20e category appropriate to the light ions)
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Zusammenfassung:	The Cronin effect that refers to the enhancement of hadron spectra at intermediate p(T) with increasing A in pA collisions is traditionally explained in terms of the broadening of the parton transverse momentum in the initial state. We show that recent data on the nuclear modification factor at eta=0 for d+Au collisions can be understood in terms of the recombination of soft and shower partons in the final state. It is the centrality dependence of the soft parton density that leads to the Cronin effect.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/physrevlett.93.082302