Soft and hard components of two-particle distributions on ($y_t,η,φ$) from p-p collisions at $\sqrt{s} = 200$ GeV

Details Soft and hard components of two-particle distributions on ($y_t,η,φ$) from p-p collisions at $\sqrt{s} = 200$ GeV Soft and hard components of two-particle distributions on ($y_t,η,φ$) from p-p collisions at $\sqrt{s} = 200$ GeV

2004-06-29

arxiv.org/abs/hep-ph/0406330v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

3 pages, 4 figures, Quark Matter 2004 poster writeup

Scientific paper

We report measurements of large-scale two-particle correlations for 200 GeV p-p collisions on momentum components transverse rapidity $y_t$ (pion mass assigned), pseudorapidity $\eta$ and azimuth angle $\phi$. In both transverse $y_t \otimes y_t$ and axial $(\eta\otimes\eta,\phi\otimes\phi) $ two-particle subspaces we observe two components of correlation structure (soft and hard) which we interpret respectively in terms of longitudinal string fragmentation and transverse minimum-bias parton fragmentation (minijets). This combination is also represented by Lund-model-based Monte Carlo simulations such as Pythia.

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