INVESTIGADORES
MONTICELLI Fernando Gabriel
artículos
Título:
Observation of associated near- and away-side long-range pseudorapidity correlations in sqrts_{nn} =5.02 TeV proton-lead collisions at the LHC with the ATLAS detector
Autor/es:
ATLAS COLLABORATION, G. AAD, F. MONTICELLI, ET AL
Revista:
PHYSICAL REVIEW LETTERS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2012 vol. 110 p. 1 - 27
ISSN:
0031-9007
Resumen:
Two-particle correlations in relative azimuthal angle (Δϕ) and pseudorapidity (Δη) 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 transverse momentum (pT) and the transverse energy (ΣETPb) summed over 3.1<η<4.9
in the direction of the Pb beam. The correlation function, constructed
from charged particles, exhibits a long-range (2<|Δη|<5) near-side (Δϕ∼0) correlation that grows rapidly with increasing ΣETPb. A long-range away-side (Δϕ∼π)
correlation, obtained by subtracting the expected contributions from
recoiling dijets and other sources estimated using events with small ΣETPb, is found to match the near-side correlation in magnitude, shape (in Δη and Δϕ) and ΣETPb dependence. The resultant Δϕ correlation is approximately symmetric about π/2, and is consistent with a dominant cos2Δϕ modulation for all ΣETPb ranges and particle pT.