54,913 research outputs found
New meter probes provide protection from high current power sources at potentials up to 600 volts
Meter probes incorporating integral fuse holder which contains limitation fuse of 600 V, 5A, with interruption rating of 50,000 KVA. provide required protection and minimize danger incurred by defective or improperly operated meter
On M-Theory Embedding of Topologically Massive Gravity
We show that topologically massive gravity can be obtained by the consistent
Kaluza-Klein reduction from recently constructed seven-dimensional gravity with
topological terms. The internal four-manifold should be Einstein with the
Pontryagin four-form constantly proportional to the volume form. We also
discuss the possible lift of the system to D=11. This enables us to connect the
mass parameter \tilde\mu in D=3 to the M5-brane charge. The dimensionless
quantity 3/(G\tilde \mu) is discrete and proportional to N, where N is the
number of M5-branes.Comment: 8 pages, no figures, references added, version appeared in
Int.J.Mod.Phys.
Most General Spherically Symmetric M2-branes and Type IIB Strings
We obtain the most general spherically symmetric M2-branes and type IIB
strings, with \R^{1,2}\times SO(8) and \R^{1,1}\times SO(8) isometries
respectively. We find that there are twelve different classes of M2-branes, and
we study their curvature properties. In particular we obtain new smooth
M2-brane wormholes that connect two asymptotic regions: one is flat and the
other can be either flat or AdS_4\times S^7. We find that these wormholes are
traversable with certain time-like trajectories. We also obtain the most
general Ricci-flat solutions in five dimensions with \R^{1,1}\times SO(3)
isometries.Comment: 37 pages, 1 table, revised version to appear in PR
Exact Green's Function and Fermi Surfaces from Conformal Gravity
We study the Dirac equation of a charged massless spinor on the general
charged AdS black hole of conformal gravity. The equation can be solved exactly
in terms of Heun's functions. We obtain the exact Green's function in the phase
space (\omega,k). This allows us to obtain Fermi surfaces for both Fermi and
non-Fermi liquids. Our analytic results provide a more elegant approach of
studying some strongly interacting fermionic systems not only at zero
temperature, but also at any finite temperature. At zero temperature, we
analyse the motion of the poles in the complex \omega plane and obtain the
leading order terms of the dispersion relation, expressed as the Laurent
expansion of \omega in terms of k. We illustrate new distinguishing features
arising at the finite temperature. The Green's function with vanishing \omega
at finite temperature has a fascinating rich structure of spiked maxima in the
plane of k and the fermion charge q.Comment: 12 pages, typos corrected, further discussions on the properties of
the Green's function and dispersion relation, new figures of the motion of
poles added. Version to appear in Phys. Lett.
Single Z' production at CLIC based on e^- gamma collisions
We analyze the potential of CLIC based on e- gamma collisions to search for
new gauge boson. Single Z' production at e-gamma colliders in two SU(3)_C
X SU(3)_L X U(1)_N models: the minimal model and the model with right-handed
(RH) neutrinos is studied in detail. Results show that new Z' gauge bosons can
be observed at the CLIC, and the cross sections in the model with RH neutrinos
are bigger than those in the minimal one.Comment: 11 pages, 4 figures, To appear in JET
A simple model of gauged lepton and baryon charges
We argue that simpler fermionic contents, responsible for the extension of
the standard model with gauged lepton and baryon charges, can be constructed by
assuming existence of so-called leptoquarks (j,k) with exotic electric charges
q_j=1/2, q_k=-1/2. Some new features in our model are that (i) as the natural
consequences of anomaly cancelation the right-handed neutrinos exist, and the
number of the observed fermion families is equal to the number of the
fundamental colors; (ii) although the lepton and baryon charges are conserved,
the neutrinos can obtain small masses through the type I seesaw mechanism in
similarity to the standard context, and the baryogenesis can be generated in
several cases. They all are natural results due to the spontaneous breaking of
these charges. Some constraints on the new physics via flavor changing and
related phenomenologies such as the stable scalar with anomalous electric
charge and interested processes at colliders are also discussed.Comment: 13 pages, revised versio
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