Spontaneous Lorentz violation: the case of infrared QED

Balachandran, AP and Kurkcuoglu, S and de Queiroz, AR and Vaidya, S (2015) Spontaneous Lorentz violation: the case of infrared QED. In: EUROPEAN PHYSICAL JOURNAL C, 75 (2).

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Abstract

It is by now clear that the infrared sector of quantum electrodynamics (QED) has an intriguingly complex structure. Based on earlier pioneering work on this subject, two of us recently proposed a simple modification of QED by constructing a generalization of the U(1) charge group of QED to the ``Sky'' group incorporating the well-known spontaneous Lorentz violation due to infrared photons, but still compatible in particular with locality (Balachandran and Vaidya, Eur Phys J Plus 128:118, 2013). It was shown that the ``Sky'' group is generated by the algebra of angle-dependent charges and a study of its superselection sectors has revealed a manifest description of spontaneous breaking of the Lorentz symmetry. We further elaborate this approach here and investigate in some detail the properties of charged particles dressed by the infrared photons. We find that Lorentz violation due to soft photons may be manifestly codified in an angle-dependent fermion mass, modifying therefore the fermion dispersion relations. The fact that the masses of the charged particles are not Lorentz invariant affects their spin content, and time dilation formulas for decays should also get corrections.

Item Type:	Journal Article
Publication:	EUROPEAN PHYSICAL JOURNAL C
Publisher:	SPRINGER
Additional Information:	Copy right for this article belongs to the SPRINGER, 233 SPRING ST, NEW YORK, NY 10013 USA
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for High Energy Physics
Date Deposited:	22 Jun 2015 06:24
Last Modified:	22 Jun 2015 06:24
URI:	http://eprints.iisc.ac.in/id/eprint/51736

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