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19922026
most citedThe Seventh Data Release of the Sloan Digital Sky Survey

5.4k citations

Showing 1994Show all

29 papers · 1 filter

nucl-th1994★ 42 cited

Impact-Parameter Dependence of Multiple Lepton-pair Production from Electromagnetic Fields

M. C. Guclu, J. C. Wells, A. S. Umar +2

In relativistic heavy-ion collisions, the strong Lorentz-contracted electromagnetic fields are capable of producing copious numbers of lepton pairs through the two-photon mechanism…

nucl-th1994

The Role of Final State Interactions in Quasielastic Fe Reactions at large

C. R. Chinn

A relativistic finite nucleus calculation using a Dirac optical potential is used to investigate the importance of final state interactions [FSI] at large momentum transfers in inc…

nucl-th1994

Mean Field Studies of Exotic Nuclei}

C. R. Chinn, A. S. Umar, M. Vallières +1

{Full three dimensional static and dynamic mean field calculations using collocation basis splines with a Skyrme type Hamiltonian are described. This program is developed to addres…

nucl-th1994★ 5 cited

Correlations in a Many-Body Calculation of Li

C. R. Chinn, J. Dechargé, J. -F. Berger

A many-body calculation of Li is presented where the only input is the well-tested, finite-range {\it D1S} effective interaction of {\it Gogny}. Pairing correlations are inc…

nucl-th1994★ 6 cited

Total Cross Sections for Neutron Scattering

C. R. Chinn, Ch. Elster, R. M. Thaler +1

Measurements of neutron total cross-sections are both extensive and extremely accurate. Although they place a strong constraint on theoretically constructed models, there are relat…

nucl-th1994★ 23 cited

Application of Multiple Scattering Theory to Lower Energy Elastic Nucleon-Nucleus Reactions

C. R. Chinn, Ch. Elster, R. M. Thaler +1

The optical model potentials for nucleon-nucleus elastic scattering at ~MeV are calculated for C, O, Si, Ca, Fe, Zr and Pb in…

hep-ex1994★ 21 cited

Polarized Bhabha Scattering and a Precision Measurement of the Electron Neutral Current Couplings

the SLD Collaboration

We present the first measurement of the left-right asymmetry in Bhabha scattering with a polarized electron beam. The effective electron vector and axial vector couplings to the Z0…

hep-ph1994★ 161 cited

Simple Non-Abelian Finite Flavor Groups and Fermion Masses

Paul H. Frampton, Thomas W. Kephart

The use of nonabelian discrete groups G as family symmetries is discussed in detail. Out of all such groups up to order g = 31, the most appealing candidates are two subgroups of S…

hep-ph1994★ 26 cited

Minimal Family Unification

Paul H. Frampton, Thomas W. Kephart

Absract It is proposed that there exist, within a new , a gauged discrete group (the order 12 double dihedral group) acting as a family symmetry. This nonabelian f…

gr-qc1994★ 2 cited

Massive Superstrings are Black Holes

Paul H. Frampton, Thomas W. Kephart

We argue that it is inconsistent to ignore the gravitational backreaction for on-shell superstring states at the Planck mass and beyond, and that these quantum states become Kerr b…

hep-ph1994★ 14 cited

The Higgs Mass as the Discriminator of Electroweak Models

Marco A. Diaz, Tonnis A. ter Veldhuis, Thomas J. Weiler

In the Minimal Supersymmetric Model (MSSM) and the Next to Minimal Supersymmetric Model [(M+1)SSM], an upper bound on the lightest higgs mass can be calculated. On the other hand,…

hep-th1994★ 12 cited

Field Redefinition Invariance and "Extra Terms"

K. M. Apfeldorf, C. R. Ordonez

We investigate the issue of coordinate redefinition invariance by carefully performing nonlinear transformations in the discretized quantum mechanical path integral. By resorting t…

hep-ph1994★ 20 cited

Higgs Mass Bounds Separate Models of Electroweak Symmetry Breaking

Marco A. Diaz, Tonnis A. ter Veldhuis, Thomas J. Weiler

Vacuum stability implies a lower limit on the mass of the higgs boson in the Standard Model (SM). In contrast, an upper limit on the lightest higgs mass can be calculated in supers…

hep-ex1994★ 106 cited

Measurement of the B -> D^* l nu Branching Fractions and |Vcb|

The CLEO Collaboration

We study the exclusive semileptonic B meson decays B- -> D*0 l- nu and B0 -> D*+ l- nu using data collected with the CLEO II detector at CESR. We present measurements of the branch…

hep-ex1994★ 15 cited

Semileptonic Branching Fraction of Charged and Neutral B Mesons

The CLEO collaboration

An examination of leptons in events tagged by reconstructed decays yields semileptonic branching fractions of for charged and $b_0=(10.9…

nucl-th1994★ 67 cited

Shape Coexistence Around S: The Deformed N=28 Region

T. R. Werner, J. A. Sheikh, W. Nazarewicz +3

Masses, deformations, radii, and single-particle properties of the very neutron-rich Sulfur isotopes are investigated in the framework of the selfconsistent mean-field theory. The…

hep-ph1994★ 9 cited

Closing the Light Gluino Window in Supersymmetric Grand Unified Models

Marco Aurelio Diaz

We study the light gluino scenario giving special attention to constraints from the masses of the light CP-even neutral Higgs , the lightest chargino , and the…

astro-ph1994★ 41 cited

Anharmonic Evolution of the Cosmic Axion Density Spectrum

K. Strobl, T. J. Weiler

We present analytic solutions to the spatially homogeneous axion field equation, using a model potential which strongly resembles the standard anharmonic potential, b…

hep-ex1994★ 117 cited

Precise Measurement of the Left-Right Cross Section Asymmetry in Boson Production by $\ee$ Collisions

The SLD Collaboration

We present a precise measurement of the left-right cross section asymmetry () for boson production by $\ee$ collisions. The measurement was performed at a center-of-mas…

hep-ph1994★ 32 cited

A Measurement of the Branching Fraction

The CLEO collaboration

Using data from the CLEO II detector at CESR, we measure where refers to either or . We use three different methods…

cond-mat1994★ 226 cited

The susceptibility and excitation spectrum of (VO)PO in ladder and dimer chain models

T. Barnes, J. Riera

We present numerical results for the magnetic susceptibility of a Heisenberg antiferromagnetic spin ladder, as a function of temperature and the spin-spin interaction strengths $J_…

hep-ph1994★ 9 cited

Measurement of the Branching Fraction for D^+ \to K^- π^+ π^+

The CLEO collaboration

Using the CLEO-II detector at CESR we have measured the ratio of branching fractions, ${\cal B}(D^+\rightarrow K^- π^+ π^+)/{\cal B}(D^0 \rightarrow K^-π^+) = 2.35 \pm 0.16 \pm 0.1…

hep-ph1994★ 58 cited

Production and Decay of D_1(2420)^0 and D_2^*(2460)^0

The CLEO Collaboration

We have investigated and final states and observed the two established charmed mesons, the with mass MeV/c…

hep-ph1994★ 32 cited

Measurement of Cabibbo Suppressed Decays of the Lepton

The CLEO Collaboration

Branching ratios for the dominant Cabibbo-suppressed decays of the lepton have been measured by CLEO~II in annihilation at CESR (~GeV) using kaons…