115174193
A proposal to study resonance production in pi- p --> x -p at 40 to 80 GeV/c
124802336
CYCLOTRON ORBITS: A 709 RAY-TRACE PROGRAM FOR CYLIN-DRICALLY SYMMETRIC MAGNETIC FIELDS
CYCLOTRON ORBITS is a 709 program for tracing secondary beams out of a cylindrically symmetric magnetic field. Development of a 6-by-6 transfer matrix allows one to couple to external quadrupole and bending magnets. (auth)
102780453
ELASTICALLY SCATTERED POLARIZATION OF 40-MeV PROTONS FROM DEUTERIUM
121567945
An optical model consistency condition between the regeneration phase and the real parts of the KON forward scattering amplitudes
Abstract Using just the magnitude of the regeneration amplitude we show that both the regeneration phase, ϕ r , and the sum of the ratios of the real to imaginary parts of the K O N forward scattering amplitudes, γ pn , can be determined for nuclei with zero or moderate neutron excess. We find: ϕ r = (43.5 ± 2.5) o ; γ pn = −0.73 ± 0.1 + 1.7 γ pn 〈 2.7 GeV /c 〉 = −0.65 ± 0.07 + 1.6 γ pn 〈 4.5 GeV /c 〉 , where γ pn is corresponding quantity for K O N scattering. Applications to regeneration in hydrogen and the ϕ-meson are discussed.
120314760
A Study of Jet Like Structure in High Transverse Energy Events Produced in p p Collisions at 400-GeV/c
The properties of events produced with high values of transverse energy in 400-GeV/c pp collisions are presented. The events were collected using the large-acceptance Fermilab multiparticle spectrometer. The fraction of events that are planar when a full-azimuthal-acceptance trigger is used does not increase with transverse energy. However, when additional requirements are applied to the data such as restricting the azimuth or polar-angle acceptance, limiting the particle multiplicity, or requiring dominance of electromagnetic or hadronic energy within an event, the fraction of planar events increases with transverse energy. None of these requirements explicitly impose planar structure and we conclude that the data show an indication for the emergence of jetlike structure. The trend of the data is consistent with the predictions of a QCD model; it cannot be described by an extrapolation of uncorrelated low-p/sub t/ phenomena.
120024085
Relations among the radiative decay widths of charmonium states from superconvergent sum rules
Relations among the decay widths for ${\ensuremath{\psi}}^{\ensuremath{'}}\ensuremath{\rightarrow}{\ensuremath{\chi}}_{J}\ensuremath{\gamma}$,${\ensuremath{\chi}}_{J}\ensuremath{\rightarrow}\ensuremath{\psi}\ensuremath{\gamma}$ (where ${\ensuremath{\chi}}_{J}$ is one of the $^{3}P$ charmonium states) are derived from two Drell-Hearn-type sum rules. The relations, which make no use of the nonrelativistic $c\overline{c}$ picture of the ${\ensuremath{\psi}}^{\ensuremath{'}}$, $\ensuremath{\chi}$, and $\ensuremath{\psi}$ states, predict${\ensuremath{\gamma}}_{2}^{\ensuremath{'}}:{\ensuremath{\gamma}}_{1}^{\ensuremath{'}}:{\ensuremath{\gamma}}_{0}^{\ensuremath{'}}=1.2:1.3:1.0$, ${\ensuremath{\gamma}}_{2}:{\ensuremath{\gamma}}_{1}:{\ensuremath{\gamma}}_{0}=0.9:0.8:1.0$, where ${\ensuremath{\gamma}}_{J}^{\ensuremath{'}}\ensuremath{\equiv}\frac{\ensuremath{\Gamma}({\ensuremath{\psi}}^{\ensuremath{'}}\ensuremath{\rightarrow}{\ensuremath{\chi}}_{J}\ensuremath{\gamma})}{(2J+1){k}_{J}^{\ensuremath{'}3}}$,${\ensuremath{\gamma}}_{J}\ensuremath{\equiv}\frac{\ensuremath{\Gamma}({\ensuremath{\chi}}_{J}\ensuremath{\rightarrow}\ensuremath{\psi}\ensuremath{\gamma})}{k_{J}^{}{}_{}{}^{3}}$.
12709532
NEW PREDICTIONS FOR ELECTROPRODUCTION AMPLITUDES IN THE RESONANCE REGION *
The role played by orbital angular momentum Lz in parton models at P =m is delineated. By postulating similar behavior for parton wave functions of equal L z, we are able to relate the electroexcitation form factors of the low-lying resonances to the elastic form factors of the nucleon.
119378018
Phenomenology of Randall-Sundrum black holes
We explore the phenomenology of microscopic black holes in the $S^1/Z_2$ Randall-Sundrum (RS) model. We consider the canonical framework in which both gauge and matter fields are confined to the brane and only gravity spills into the extra dimension. The model is characterized by two parameters, the mass of the first massive graviton $(m_1)$, and the curvature $1/\ell$ of the RS anti-de Sitter space. We compute the sensitivity of present and future cosmic ray experiments to various regions of $\ell$ and $m_1,$ and compare with that of Runs I and II at the Tevatron. As part of our phenomenological analysis, we examine constraints placed on $\ell$ by AdS/CFT considerations.
3112178
Auger test of the Cen A model of highest energy cosmic rays.
If, as recently proposed by Farrar and Piran, Cen A is the source of cosmic rays detected above the Greisen-Zatsepin-Kuz'min cutoff, neutrons are approximately 140 more probable than protons to be observed along its line of sight. This is because the proton flux is rendered nearly isotropic by O(microG) intergalactic magnetic fields. With the anticipated aperture of the Southern Auger Observatory, one may expect on the order of 2 neutron events /year above 10(20) eV in the line of sight of Cen A.
121355086
Estimates for the probability of detecting neutral heavy leptons in hadron-initiated interactions
A consideration of two mechanisms for the production of neutral heavy leptons (${L}^{0}$'s) in hadron-initiated interactions lead to an estimate of ${10}^{\ensuremath{-}39}$ ${\mathrm{cm}}^{2}$ for the cross section per nucleon for observing the trimuons associated with the production of $\ensuremath{\mu}$-coupled ${L}^{0}$'s. This is well below the estimated background due to the production of a pair of ${\ensuremath{\rho}}^{0}$'s which decay into $\ensuremath{\mu}$ pairs.