3,914 research outputs found
Drell-Yan Production of Z' in the Three-Site Higgsless Model at the LHC
In the Higgsless models, there are extra gauge bosons which keep the
perturbative unitarity of a longitudinally polarized gauge boson. The
three-site Higgsless model is a minimal Higgsless model and contains three
extra gauge bosons, and Z'. In this paper, we report the
discovery potential of the Z' gauge boson via Drell-Yan production with
Z'(mass=380, 500, 600 GeV) (,
) at the LHC (=14 TeV).Comment: 7 pages, 5 figures included. References revise
Microscopic Theory of Protein Folding Rates.II: Local Reaction Coordinates and Chain Dynamics
The motion involved in barrier crossing for protein folding are investigated
in terms of the chain dynamics of the polymer backbone, completing the
microscopic description of protein folding presented in the previous paper.
Local reaction coordinates are identified as collective growth modes of the
unstable fluctuations about the saddle-points in the free energy surface. The
description of the chain dynamics incorporates internal friction (independent
of the solvent viscosity) arising from the elementary isomerizations of the
backbone dihedral angles. We find that the folding rate depends linearly on the
solvent friction for high viscosity, but saturates at low viscosity because of
internal friction. For -repressor, the calculated folding rate
prefactor, along with the free energy barrier from the variational theory,
gives a folding rate that agrees well with the experimentally determined rate
under highly stabilizing conditions, but the theory predicts too large a
folding rate at the transition midpoint. This discrepancy obtained using a
fairly complete quantitative theory inspires a new set of questions about chain
dynamics, specifically detailed motions in individual contact formation.Comment: 18 pages, 8 figure
Biotechnical aspects in marine pearl production
India is one in the countries in the World having pearl oyster resource. The oysters are available in the Gulf of Mannar (southeast coast) in large number and ill the Gulf of Kutch northwest coast in lesser numbers. From time immemorial the oysters from thes regions were fished for natural pearls. The famed "Oriental pearls" of the ancient times were the pearls produced from here and the Middle-East Asia
Modeling the Polarization of Dusty Scattering Cones in Active Galactic Nuclei
We have used the STOKES radiative transfer code, to model polarization induced by dust scattering in the polar regions of Active Galactic Nuclei (AGN). We discuss the wavelength-dependence of the spectral intensity and polarization over the optical/UV range at different viewing angles for two different types of dust: a Galactic dust model, and a dust model inferred from extinction properties of AGN
Lattice Heavy Quark Effective Theory and the Isgur-Wise function
We compute the Isgur-Wise function using heavy quark effective theory
formulated on the lattice. The non-relativistic kinetic energy term of the
heavy quark is included to the action as well as terms remaining in the
infinite quark mass limit. The classical velocity of the heavy quark is
renormalized on the lattice and we determine the renormalized velocity
non-perturbatively using the energy-momentum dispersion relation. The slope
parameter of the Isgur-Wise function at zero recoil is obtained at
on a lattice for three values of .Comment: 14 pages of A4 format and 8 figures in one uuencoded postscript fil
Fruit scent and observer colour vision shape food-selection strategies in wild capuchin monkeys
The senses play critical roles in helping animals evaluate foods, including fruits that can change both in colour and scent during ripening to attract frugivores. Although numerous studies have assessed the impact of colour on fruit selection, comparatively little is known about fruit scent and how olfactory and visual data are integrated during foraging. We combine 25 months of behavioural data on 75 wild, white-faced capuchins (Cebus imitator) with measurements of fruit colours and scents from 18 dietary plant species. We show that frequency of fruit-directed olfactory behaviour is positively correlated with increases in the volume of fruit odours produced during ripening. Monkeys with red-green colour blindness sniffed fruits more often, indicating that increased reliance on olfaction is a behavioural strategy that mitigates decreased capacity to detect red-green colour contrast. These results demonstrate a complex interaction among fruit traits, sensory capacities and foraging strategies, which help explain variation in primate behaviour.https://www.nature.com/articles/s41467-019-10250-9Published versio
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