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Long Range Energy-energy Correlator at the LHC
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abstract
We study the forward-backward azimuthal angular correlations of hadrons in association with multi-particle production in the central rapidity region in proton-proton collisions at the LHC. We apply the nucleon energy-energy correlator framework, where the spinning gluon distribution introduces a nontrivial $\cos(2\phi)$ asymmetries. We will demonstrate that the fundamental helicity structure of QCD amplitudes predicts a unique power counting rule: $\cos(2\phi)$ asymmetry starts at ${O}(\alpha_s^2)$ order for dijet, ${O}(\alpha_s)$ for three jet and ${O}(1)$ for four (and more) jet productions. Our results will help us to understand the long standing puzzle of nearside ridge behavior observed in high multiplicity events of $pp$ collisions at the LHC.
Forward citations
Cited by 3 Pith papers
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Gluonic nucleon energy correlators and fracture functions for Color Glass Condensate
Gluonic nucleon energy correlators in the CGC reduce at eikonal accuracy to the unpolarized and linearly polarized gluon components, both given by the adjoint dipole S-matrix, and the linearly polarized one drives a s...
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Energy-Energy Correlator at Hadron Colliders: Celestial Blocks and Singularities
First analytic leading-order calculation of the full-angle energy-energy correlator in hadron collisions, with celestial block decomposition and Regge-limit factorization.
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Energy-Energy Correlator for jet production in $pp$ and $pA$ collisions
A TMD-inspired non-perturbative model plus leading-logarithm perturbative evolution describes the full angular energy-energy correlator in pp and pA jet production and attributes the observed pA suppression to medium-...
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