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Experimental High Energy Physics

Publications

Observation of Associated Near-side and Away-side Long-range Correlations in sNN−−−−√=5.02 TeV Proton-lead Collisions with the ATLAS Detector

Publicaciones

Observation of Associated Near-side and Away-side Long-range Correlations in sNN−−−−√=5.02 TeV Proton-lead Collisions with the ATLAS Detector

Research areas:

Física Experimental de Alta Energía

Year:

2013

Type of Publication:

In Proceeding

Authors:

Journal:

Phys. Rev. Lett

Volume:

110

Pages:

5

Abstract:

Two-particle correlations in relative azimuthal angle (Δ−ϕ) and pseudorapidity (Δ−η) are measured in sNN−−−√ = 5.02 TeV p+Pb collisions using the ATLAS detector at the LHC. The measurements are performed using approximately 1 μb−1 of data as a function of pT and the transverse energy (∑EPbT) summed over 3.1 recoiling dijets and other sources estimated using events with small ∑EPbT, is found to match the near-side correlation in magnitude, shape (in Δ−η and Δ−ϕ) and ∑EPbT dependence. The resultant Δ−ϕ correlation is approximately symmetric about π/2, and is consistent with a cos(2Δ−ϕ) modulation for all ∑EPbT ranges and particle pT. The amplitude of this modulation is comparable in magnitude and pT dependence to similar modulations observed in heavy-ion collisions, suggestive of final-state collective effects in high multiplicity events.

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