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Please use this identifier to cite or link to this item: http://hdl.handle.net/2289/4463
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dc.contributor.authorGupta, Nayantara-
dc.date.accessioned2012-05-08T04:42:37Z-
dc.date.available2012-05-08T04:42:37Z-
dc.date.issued2004-02-
dc.identifier.citationPhysics Letters B, 2004, Vol.580, p103en
dc.identifier.issn0370-2693-
dc.identifier.urihttp://hdl.handle.net/2289/4463-
dc.descriptionRestricted Access. An open-access version is available at arXiv.org (one of the alternative locations)en
dc.description.abstractThe clustering of ultra high energy cosmic ray events suggests that they have originated from compact sources. One of the possible physical mechanisms by which ultra high energy nuclei reach the Earth from far away astrophysical sources (quasars or BL Lac objects) evading the Greisen-Zatsepin-Kuzmin (GZK) cut-off is by violation of Lorentz invariance. Assuming that there is violation of Lorentz invariance, we calculate the expected number of neutron events from some of the EGRET sources (including γ-ray loud BL Lac objects) which can be correlated in direction with ultra high energy cosmic ray events observed by AGASA above energy 4×1019 eV. We present in this Letter what AGASA should see in future if violation of Lorentz invariance is responsible for the propagation of ultra high energy cosmic rays having energies above the GZK cut-off when there is a correlation of EGRET sources with the ultra high energy cosmic ray events.en
dc.language.isoenen
dc.publisherElsevier B.V.en
dc.relation.urihttp://adsabs.harvard.edu/abs/2004PhLB..580..103Gen
dc.relation.urihttp://arxiv.org/abs/astro-ph/0309421en
dc.relation.urihttp://dx.doi.org/10.1016/j.physletb.2003.11.044en
dc.rights2004 Elsevier B.V.en
dc.subjectLorentz and Poincare invarianceen
dc.subjectQuasarsen
dc.subjectactive or peculiar galaxiesen
dc.titleObservability of neutron events above the Greisen-Zatsepin-Kuzmin cut-off due to violation of Lorentz invarianceen
dc.typeArticleen
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