Title
On correlations in high-energy hadronic processes and the CMS ridge : a manifestation of quantum entanglement?
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Singapore ,
Subject
Physics
Source (journal)
International journal of modern physics: A: particles and fields, gravitation, cosmology. - Singapore
Volume/pages
27(2012) :2 , 14 p.
ISSN
0217-751X
0217-751X
Article Reference
1250008
Carrier
E-only publicatie
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
We discuss the possibility of quantum entanglement for pairs of charged particles produced in high-energy pp-collisions at the LHC. Using a framework of interacting Wilson lines, we calculate 2D and 1D two-particle angular correlation functions in terms of the differences of the pseudorapidities and azimuthal angles of the produced particles. The calculated near-side angular correlation shows a localized maximum around Delta phi approximate to 0, though it is less pronounced compared to the peak observed by the CMS Collaboration. We argue that this soft correlation is universal and insensitive to the specific properties of the matter (quark-gluon plasma, QCD vacuum, etc.) used to describe hadronic states - though such properties can be included to further improve the results.
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