Two-particle azimuthal and rapidity correlations in intervals of transverse momentum in π+ p-interactions at 250 GeV/c

Scaling laws for density correlations and fluctuations in multiparticle dynamics

“…Early results on this topic can be found in [87]. Recent data on K 2 (0, y 2 ) [88] for all particles and for particles with p T smaller or larger than 0.3 GeV/c, plotted in Fig. 3.14, indeed reveal a strong sensitivity to transverse momentum.…”

“…In Fig. 3.17, the distribution W (∆ϕ, ∆y), normalized to unity, is shown as a function of ∆ϕ, for all charge combinations, in the intervals ∆y < 1, 1 < ∆y < 2 and 2 < ∆y < 3 [88]. A horizontal line at the average value 1/π corresponds to a flat distribution in ∆ϕ.…”

“…17 W (∆ϕ, ∆y) for inclusive non-single-diffractive π + p interactions at 250 GeV/c as compared to FRITIOF2.0 (dot-dashed), DPM (full) and QGSM (dashed)[88].…”

“…18 W (∆ϕ, ∆y, p T ) as compared with calculations in FRITIOF2.0 (dot-dashed), DPM (full) and QGSM (dashed) for ∆y < 1 and p T cuts as indicated[88].…”

Soft Ridge in Proton–proton Collisions

“…Of particular interest is the possible connection of this phenomenon to the similar structure of the long-range near side correlations earlier discovered in heavy ion collisions at RHIC at √ s = 200 GeV [2,3,4]. Still earlier, before RHIC, experimental analysis of C(∆η, ∆φ) did not reveal such ridge-like structures (e.g., see [5,6] and the review paper [7]).…”