1,759 research outputs found
Photon mass via current confinement
A parity invariant theory, consisting of two massive Dirac fields, defined in
three dimensional space-time, with the confinement of a certain current is
studied. It is found that the electromagnetic field, when coupled minimally to
these Dirac fields, becomes massive owing to the current confinement. It is
seen that the origin of photon mass is not due to any kind of spontaneous
symmetry breaking, but only due to current confinement.Comment: LaTeX2e, 14 pages, No figures, to appear in Physics Letters B. arXiv
admin note: text overlap with arXiv:1107.552
Spiky strings on AdS3 x S3 with NS-NS flux
We study rigidly rotating strings in the background of AdS3 x S3 with
Neveu-Schwarz (NS) fluxes. We find two interesting limiting cases corresponding
to the known giant magnon and the new single spike solution of strings in the
above background and write down the dispersion relations among various
conserved charges. We use proper regularization to find the correct relations
among them. We further study the circular and infinite spiky strings on AdS and
study their properties.Comment: 19 pages, added clarification, typos fixe
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