26505270
Decoupling and anomalous bandcrossings in odd-proton nuclei.
The anomalous bandcrossing observed in the [541] [down arrow] bands of odd-[ital Z] nuclei from the rare-earth region was investigated in the framework of the particle-rotor model. The participation of the decoupling term in the [ital K]=1/2 band will give rise to a significant shift of the bandcrossing frequency, with an amplitude comparable to the observed values.
126195733
Double beta decay‐an experimental review
In this review, a brief discussion on the experimental objectives and theoretical conceptions of the neutrinos was introduced. Two different types of experimental methods and their results were presented and discussed.
29674729
Relation between the kinematic and dynamic moments of inertia in superdeformed nuclei.
The relation between the kinematic and dynamic moments of inertia, {ital scrJ}{sup (1)} and {ital scrJ}{sup (2)}, was analyzed for the normally deformed and superdeformed rotational bands. According to the {ital ab} expression for rotational spectrum, {ital E}({ital I})={ital a}( {radical}1+{ital bI}({ital I}+1) {minus}1), the ratio {ital R}= {radical}({ital scrJ}{sup (1)}){sup 3}/{ital scrJ}{sup (2)} should be {ital I} independent. Extensive analyses for the normally deformed rotational bands in the rare-earth and actinide nuclei show that the {ital R}'s do remain {ital I} independent. The same relation holds well for the superdeformed bands observed in the {ital A}{similar to}190 region, and seems also to hold for those in the {ital A}{similar to}150 region, if spin assignments are made correctly. The {ital I} independence of {ital R} provides an additional support to the spin assignments.
121100619
NEW HIGH ACCURACY MEASUREMENT OF THE PIONIC MASS
The pionic x-ray energies of the 4f-3d transition in ..pi..-P and the 5f-4d transition in ..pi..-Ti were measured with a bent-crystal spectrometer at the Nevis synchrocyclotron; and a new value of the pionic mass is deduced to be 139567.5 +- 0.9 keV, leading to an improved value for the ..mu..-neutrino mass of m..nu../sub ..mu..//sup 2/=0.102 +- 0.119 MeV/sup 2/; m..nu../sub ..mu../<0.52 MeV, at 90% confidence level.
120646099
MUONIC ATOMS. I. DYNAMIC HYPERFINE STRUCTURE IN THE SPECTRA OF DEFORMED NUCLEI.
120538673
A streamer chamber used in a search for double beta decay
Abstract A 53 cm dia., 8 cm deep helium-filled streamer chamber is described. At a field strength of 6.2 kV/cm, streamers extend over the entire space between the plates of the chamber and the particle track is shown by bright, narrow regions in the streamers. The mechanism of electrical breakdown in this mode of operation and other modes was investigated. The streamer theory of Raether correctly predicts breakdown-time and dead-space. Penning effect by impurities in the chamber gas appears to influence discharge development significantly at the low field strengths used in track-projecting chambers but not at the high field strengths used in streamer chambers.
44568977
Is the Gepner three generation model phenomenologically viable?
The low-energy spectrum of the Gepner three generation model constructed from the discrete series of the [ital N]=2 superconformal theory below the intermediate scale is studied. It is found that, aside from the usual standard model leptons and quarks, there appear four Higgs doublets, six exotic light neutral particles, and a pair of light color Higgs triplets. Although the proton is stable, the presence of these new particles and the difficulty for the up and down quarks and the first two lepton generations to grow nonzero masses may rule out this model phenomenologically. Despite this discouraging result we do find that the nonrenormalizable interactions can provide a viable mechanism to solve the lepton-quark mass hierarchy problem, due to the large VEV growth of the standard model singlet fields at the intermediate symmetry-breaking scale.
18651854
Sources of CP violation in the two-Higgs-doublet model.
Assuming $\mathrm{CP}$ violation arises solely through the Higgs potential, we develop the most general two-Higgs-doublet model. There is no discrete symmetry that distinguishes the two Higgs bosons. It is assumed that an approximate global family symmetry sufficiently suppresses flavor-changing neutral scalar interactions. In addition to a Cabibbo-Kobayashi-Maskawa phase, neutral boson mixing, and superweak effects, there can be significant $\mathrm{CP}$ violation due to charged Higgs boson exchange. The value of $\frac{{\ensuremath{\epsilon}}^{\ensuremath{'}}}{\ensuremath{\epsilon}}$ due to this last effect could be as large as in the standard model.
29537174
Interacting string field theory and Chern-Simons form.
We propose a new gauge-invariant action for an interacting open-string field theory based on an analogy with the Chern-Simons form. We also discuss the Becchi-Rouet-Stora-Tyutin quantization of this action.