15,885 research outputs found
Higgs Sector of the Left-Right Model with Explicit CP Violation
We explore the Higgs sector of the Minimal Left-Right (LR) Model based on the
gauge group SU(2)_L x SU(2)_R x U(1)_{B-L} with explicit CP violation in the
Higgs potential. Since flavour-changing neutral current experiments and the
small scale of neutrino masses both place stringent constraints on the Higgs
potential, we seek to determine whether minima of the Higgs potential exist
that are consistent with current experimental bounds. We focus on the case in
which the right-handed symmetry-breaking scale is only ``moderately'' large, of
order 15-50 TeV. Unlike the case in which the Higgs potential is CP-invariant,
the CP noninvariant case does yield viable scenarios, although these require a
small amount of fine-tuning. We consider a LR model supplemented by an
additional U(1) horizontal symmetry, which results in a Higgs sector consistent
with current experimental constraints and a realistic spectrum of neutrino
masses.Comment: 20 pages, 2 figure
Gauge model at finite temperature with massive quarks and at finite density on anisotropic lattice
Critical properties of QCD and the chiral condensate at finite density are
analytically studied on an anisotropic lattice in the approximation SU(N)
\simeq Z(N). Asymptotic behavior of the partition function and its continuum
limit are discussed.Comment: talk given by L.A.Averchenkova at LATTICE'98, Boulder, CO, USA, 13-18
July 1998, 3 pages, LaTex, no figure
Novel mechanism for temperature-independent transitions in flexible molecules: role of thermodynamic fluctuations
Novel physical mechanism is proposed for explanation of
temperature-independent transition reactions in molecular systems. The
mechanism becomes effective in the case of conformation transitions between
quasi-isoenergetic molecular states. It is shown that at room temperatures,
stochastic broadening of molecular energy levels predominates the energy of low
frequency vibrations accompanying the transition. This leads to a cancellation
of temperature dependence in the stochastically averaged rate constants. As an
example, physical interpretation of temperature-independent onset of P2X_3
receptor desensitization in neuronal membranes is provided.Comment: 4 pages, 1 figur
The Schwarzschild black hole as a point particle
The description of a point mass in general relativity (GR) is given in the
framework of the field formulation of GR where all the dynamical fields,
including the gravitational field, are considered in a fixed background
spacetime. With the use of stationary (not static) coordinates non-singular at
the horizon, the Schwarzschild solution is presented as a point-like field
configuration in a whole background Minkowski space. The requirement of a
stable -causality stated recently in [J.B.Pitts and W.C.Schieve, Found.
Phys., v. 34, 211 (2004)] is used essentially as a criterion for testing
configurations.Comment: LATEX, 8 pages, no figure
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