53,068 research outputs found
Minimal Models for Axion and Neutrino
The PQ mechanism resolving the strong CP problem and the seesaw mechanism
explaining the smallness of neutrino masses may be related in a way that the PQ
symmetry breaking scale and the seesaw scale arise from a common origin.
Depending on how the PQ symmetry and the seesaw mechanism are realized, one has
different predictions on the color and electromagnetic anomalies which could be
tested in the future axion dark matter search experiments. Motivated by this,
we construct various PQ seesaw models which are minimally extended from the
(non-) supersymmetric Standard Model and thus set up different benchmark points
on the axion-photon-photon coupling in comparison with the standard KSVZ and
DFSZ models.Comment: 12 pages and 2 figures, references added, matched with the published
version in PL
Hawking temperature from scattering off the charged 2D black hole
The charged 2D black hole is visualized as presenting an potential barrier
to on-coming tachyon wave. Since this takes the complicated
form, an approximate form is used for scattering analysis. We
calculate the reflection and transmission coefficients for scattering of
tachyon off the charged 2D black hole. The Hawking temperature is also derived
from the reflection coefficient by Bogoliubov transformation. In the limit of
, we recover the Hawking temperature of the 2D dilaton black hole.Comment: 12 pages 3 figures, RevTeX, to obtain figures contact author
([email protected]
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