Comparing the same-side "ridge" in CMS p-p angular correlations to RHIC p-p data

Details Comparing the same-side "ridge" in CMS p-p angular correlations to RHIC p-p data Comparing the same-side "ridge" in CMS p-p angular correlations to RHIC p-p data

2010-10-15

arxiv.org/abs/1010.3048v2

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 4 figures, response to referee comments

Scientific paper

The CMS collaboration has recently reported the appearance of a same-side "ridge" structure in two-particle angular correlations from 7 TeV p-p collisions. The ridge in p-p collisions at 7 TeV has been compared to a ridge structure in more-central Au-Au collisions at 0.2 TeV interpreted by some as evidence for a dense, flowing QCD medium. In this study we make a detailed comparison between 0.2 TeV p-p correlations and the CMS results. We find that 7 TeV minimum-bias jet correlations are remarkably similar to those at 0.2 TeV, even to the details of the same-side peak geometry. Extrapolation of azimuth quadrupole systematics from 0.2 TeV suggests that the same-side ridge at 7 TeV is a manifestation of the azimuth quadrupole with amplitude enhanced by applied cuts.

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