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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Fingerprints of disoriented chiral condensates in cosmic ray showers

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Author(s):
de Almeida, R. M. [1, 2] ; de Mello Neto, J. R. T. [1] ; Fraga, E. S. [1] ; Santos, E. M. [1]
Total Authors: 4
Affiliation:
[1] Univ Fed Rio de Janeiro, Inst Fis, BR-21941972 Rio De Janeiro, RJ - Brazil
[2] Univ Fed Fluminense, EEIMVR, BR-27255125 Volta Redonda, RJ - Brazil
Total Affiliations: 2
Document type: Journal article
Source: Astroparticle Physics; v. 37, p. 75-80, SEP 2012.
Web of Science Citations: 0
Abstract

Although the generation of disoriented chiral condensates (DCCs), where the order parameter for chiral symmetry breaking is misaligned with respect to the vacuum direction in isospin state, is quite natural in the theory of strong interactions, they have so far eluded experiments in accelerators and cosmic rays. If DCCs are formed in high-energy nuclear collisions, the relevant outcome are very large event-by-event fluctuations in the neutral-to-charged pion fraction. In this note we search for fingerprints of DCC formation in observables of ultra-high energy cosmic ray showers. We present simulation results for the depth of the maximum (X-max) and number of muons on the ground, evaluating their sensitivity to the neutral-to-charged pion fraction asymmetry produced in the primary interaction. (C) 2012 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 08/04259-0 - High energy cosmic rays
Grantee:Luiz Vitor de Souza Filho
Support Opportunities: Research Grants - Young Investigators Grants