3,634 research outputs found
Flavor violating from SUSY GUT in High-Scale SUSY
We propose an supersymmetric grand unified theory (SUSY GUT), where
the gauge symmetry breaks down to at the GUT scale and is radiatively broken at
the SUSY-braking scale. In order to achieve the observed Higgs mass around
GeV and also to satisfy constraints on flavor- and/or CP-violating
processes, we assume that the SUSY-breaking scale is TeV, so that the
breaking scale is also TeV. One big issue in the SO(10) GUTs
is how to realize realistic Yukawa couplings. In our model, not only -dimensional but also -dimensional matter fields are introduced
to predict the observed fermion masses and mixings. The Standard-Model quarks
and leptons are linear combinations of the - and -dimensional fields so that the gauge interaction may be
flavor-violating. We investigate the current constraints on the
flavor-violating interaction from the flavor physics and discuss prospects
for future experiments.Comment: 13 pages, IPMU-15-003
Glauber dynamics in the continuum via generating functionals evolution
We construct the time evolution for states of Glauber dynamics for a spatial
infinite particle system in terms of generating functionals. This is carried
out by an Ovsjannikov-type result in a scale of Banach spaces, leading to a
local (in time) solution which, under certain initial conditions, might be
extended to a global one. An application of this approach to Vlasov-type
scaling in terms of generating functionals is considered as well.Comment: 24 page
Differential activation of p38 and extracellular signal-regulated kinase in spinal cord in a model of bee venom-induced inflammation and hyperalgesia
<p>Abstract</p> <p>Background</p> <p>Honeybee's sting on human skin can induce ongoing pain, hyperalgesia and inflammation. Injection of bee venom (BV) into the intraplantar surface of the rat hindpaw induces an early onset of spontaneous pain followed by a lasting thermal and mechanical hypersensitivity in the affected paw. The underlying mechanisms of BV-induced thermal and mechanical hypersensitivity are, however, poorly understood. In the present study, we investigated the role of mitogen-activated protein kinase (MAPK) in the generation of BV-induced pain hypersensitivity.</p> <p>Results</p> <p>We found that BV injection resulted in a quick activation of p38, predominantly in the L4/L5 spinal dorsal horn ipsilateral to the inflammation from 1 hr to 7 d post-injection. Phosphorylated p38 (p-p38) was expressed in both neurons and microglia, but not in astrocytes. Intrathecal administration of the p38 inhibitor, SB203580, prevented BV-induced thermal hypersensitivity from 1 hr to 3 d, but had no effect on mechanical hypersensitivity. Activated ERK1/2 was observed exclusively in neurons in the L4/L5 dorsal horn from 2 min to 1 d, peaking at 2 min after BV injection. Intrathecal administration of the MEK inhibitor, U0126, prevented both mechanical and thermal hypersensitivity from 1 hr to 2 d. p-ERK1/2 and p-p38 were expressed in neurons in distinct regions of the L4/L5 dorsal horn; p-ERK1/2 was mainly in lamina I, while p-p38 was mainly in lamina II of the dorsal horn.</p> <p>Conclusion</p> <p>The results indicate that differential activation of p38 and ERK1/2 in the dorsal horn may contribute to the generation and development of BV-induced pain hypersensitivity by different mechanisms.</p
Small Fermi surface in the one-dimensional Kondo lattice model
We study the one-dimensional Kondo lattice model through the density matrix
renormalization group (DMRG). Our results for the spin correlation function
indicate the presence of a small Fermi surface in large portions of the phase
diagram, in contrast to some previous studies that used the same technique. We
argue that the discrepancy is due to the open boundary conditions, which
introduce strong charge perturbations that strongly affect the spin Friedel
oscillations.Comment: 5 pages, 7 figure
Darboux Transformations for Supersymmetric Korteweg - de Vries Equations
\hspace{.2in}We consider the Darboux type transformations for the spectral
problems of supersymmetric KdV systems. The supersymmetric analogies of Darboux
and Darboux-Levi transformations are established for the spectral problems of
Manin-Radul-Mathieu sKdV and Manin-Radul sKdV. Several B\"acklund
transformations are derived for the MRM sKdV and MR sKdV systems.Comment: Latex, 8 pages AS-ITP-94-4
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