1,423 research outputs found
Probing gauge-phobic heavy Higgs bosons at high energy hadron colliders
We study the probe of the gauge-phobic (or nearly gauge-phobic) heavy Higgs
bosons (GPHB) at high energy hadron colliders including the 14 TeV LHC and the
50 TeV Super Proton-Proton Collider (SppC). We take the process , and study it at the hadron level including simulating the jet
formation and top quark tagging (with jet substructure). We show that, for a
GPHB with GeV, can be determined by adjusting the value
of in the theoretical distribution to fit the observed
distribution, and the resonance peak can be seen at the SppC for
=800 GeV and 1 TeV.Comment: 6 pages, with 7 eps files for 7 figure
Effects of Gamma Irradiation on in Vitro Cultures of Selected Orchid Hybrids
Mutation breeding is an alternative strategy to conventional breeding.
The physical mutagen, gamma (y) radiation, has long been used in various
mutation breeding programmes. In this connection it is necessary to determine
the optimum dose before starting any mutation breeding programme.
In vitro cultured protocorm-like bodies (PLBs) of 2 orchid hybrids,
Mokara Chark Kuan and Dendrobium Jacky were used to study the effects of yirradiation
and to determine the optimum dose. The PLBs were irradiated with
y-rays at different doses of 0, 25, 50, 75, 100, 125 and 150 Grays (Gy) in Set I and 0, 20, 40, 60 and 80 Gy in Set II of the experiment. A senes of
observations on the effects of y-irradiation were recorded. Effects on genomic
DNA were also observed.
The present study showed that irradiation resulted in various degrees of
lethality to in vitro cultures of both Mokara Chark Kuan and Dendrobium
Jacky. Decrease in survival with increasing doses of y-irradiation was
significantly observed. Optimum dose of y-irradiation for in vitro cultures of
Mokara Chark Kuan and Dendrobium Jacky were estimated to be in the range
of 20-40 Gy and 60-70 Gy respectively.
Regeneration of plantlets was found to decline when higher irradiation
doses were applied. Irradiation also has inhibited regeneration of in vitro
cultures of both hybrids
Pole analysis on the hadron spectroscopy of
In this paper we study the spectroscopy in the process of
. The final state interactions of coupled channel
~-~ ~-~ are constructed
based on K-matrix with the Chew-Mandelstam function. We build the amplitude according to the Au-Morgan-Pennington method. The event
shape is fitted and the decay width of is used to
constrain the parameters, too. With the amplitudes we extract out the poles and
their residues. Our amplitude and pole analysis suggest that the
should be molecule, the could be an S-wave
compact pentaquark state, and the structure around is caused by the
cusp effect. The future experimental measurement of the decays of and would further
help to study the nature of these resonances.Comment: updated to the published versio
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