Initial state angular asymmetries in high energy p plus A collisions: Spontaneous breaking of rotational symmetry by a color electric field and C-odd fluctuations

Author(s)

Dumitru, Adrian ^{[1, 2]} ; Giannini, Andre V. ^{[3, 1]}

Affiliation

^[1] CUNY Bernard M Baruch Coll, Dept Nat Sci, New York, NY 10010 - USA

^[2] CUNY Grad Sch & Univ Ctr, New York, NY 10016 - USA

^[3] Univ Sao Paulo, Inst Fis, BR-05315970 Sao Paulo - Brazil

• Document type: Journal article
• Source: Nuclear Physics A; v. 933, p. 212-228, JAN 2015.
• Web of Science Citations: 32

Abstract

We present a simple model for generating initial-state azimuthal asymmetries in pA collisions from dipole scattering on an anisotropic dense target. Parity even angular harmonics arise from the C-even real part of the dipole S-matrix which spontaneously breaks rotational symmetry in two dimensions due to a condensate for the color electric field. This leads to an angular correlation with the direction of E. Parity odd harmonics are generated by the C-odd imaginary part (odderon) due to coupling to coherent target fluctuations which again break rotational invariance. We perform a first qualitative extraction of the amplitude and cutoff of C-odd fluctuations in the dense target. (C) 2014 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 13/23848-5 - Phenomenology of gluon saturation in pa and AA collisions at the LHC
• Grantee: André Veiga Giannini
• Support Opportunities: Scholarships abroad - Research Internship - Doctorate