Explanipedia

Progress towards precision measurements of beta-decay correlation parameters using atom and ion traps Open

D. Melconian, Spencer Behling, B. Fenker, M. Mehlman, P. D. Shidling , et al. · 2014

Physics Mathematics Computer science

The correlations of the decay products following the beta decay of nuclei have a long history of providing a low-energy probe of the fundamental symmetries of our universe. Over half a century ago, the correlation of the electrons followin…

Direct Measurement of the Pion Valence-Quark Momentum Distribution, the Pion Light-Cone Wave Function Squared Open

E. M. Aitala, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery , et al. · 2001

Physics Economics

We present the first direct measurements of the pion valence-quark momentum distribution which is related to the square of the pion light-cone wave function. The measurements were carried out using data on diffractive dissociation of 500 G…

Observation of Color-Transparency in Diffractive Dissociation of Pions Open

E. M. Aitala, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery , et al. · 2001

Physics Chemistry

We have studied the diffractive dissociation into dijets of 500 GeV/c pions scattering coherently from carbon and platinum targets. Extrapolating to asymptotically high energies (where t(min)-->0), we find that when the per-nucleus cross s…

The contribution of $\Sigma^* \to \Lambda\pi$ to measured $\Lambda$ polarization Open

D. Ashery, Harry J. Lipkin · 2000

Physics Chemistry

Calculations of the polarization of $\\Lambda$ and $\\bar{\\Lambda}$ particlesafter fragmentation of a polarized quark produced in processes like $Z$-decayand deep inelastic polarized lepton scattering must include $\\Lambda$ and$\\bar{\\L…

Diffractive Dissociation of High Momentum Pions Open

D. Ashery · 1999

Physics Chemistry

The diffractive dissociation of 500 GeV/c $π^-$ into di-jets is described as a way to measure the momentum distribution of quarks in the pion. The measurements of the pion diffractive dissociation were carried out using data from Fermilab …

Measurements of Lifetimes and a Limit on the Lifetime Difference in the Neutral-Meson System Open

E. M. Aitala, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery , et al. · 1999

Physics Chemistry

Using the large hadroproduced charm sample collected in experiment E791 at Fermilab, we report the first directly measured constraint on the decay-width difference Delta Gamma for the mass eigenstates of the D0-D0bar system. We obtain our …

Search for CP violation in charged D meson decays Open

E. M. Aitala, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery , et al. · 1997

Physics Mathematics

We report results of a search for CP violation in the singly Cabibbo-suppressed decays D+ -> K- K+ pi+, phi pi+, K*(892)0 K+, and pi- pi+ pi+ based on data from the charm hadroproduction experiment E791 at Fermilab. We search for a differe…

Observation of D - π production correlations in 500 GeV π− - N interactions Open

E. M. Aitala, S. Amato, J. C. Anjos, J. A. Appel, D. Ashery , et al. · 1997

Physics Economics

We study the charge correlations between charm mesons produced in 500 GeV pi- - N interactions and the charged pions produced closest to them in phase space. With 110,000 fully reconstructed D mesons from experiment E791 at Fermilab, the c…

Pentaquark Search with Energetic Hadron Beams Open

M. A. Moinester, D. Ashery, L.G. Landsberg, Harry J. Lipkin · 1994

Physics

The strange-anticharmed Pentaquark is a uud(cbar)s or udd(cbar)s five-quark baryon that is expected to be either a narrow resonance, or possibly even stable against strong decay. We describe this hyperon here; its structure, binding energy…

Charm physics at Fermilab E791 Open

S. Amato, J. C. Anjos, I. Bediaga, I. Costa, A. De Roeck , et al. · 1992

Physics

Experiment 791 at Fermilab's Tagged Photon Laboratory has just accumulated a high statistics charm sample by recording 20 billion events on 24000 8mm tapes. A 500 GeV/c [pi][sup [minus]] beam was used with a fixed target and a magnetic spe…

Pion Absorption on the Diproton Open

Eli Piasetzky, D. Ashery, M. A. Moinester, Gerald A. Miller, A. Gal · 1986

Physics Chemistry

A partial-wave analysis of recent low-energy pion-absorption data on a diproton ($^{1}S_{0}$) in $^{3}\mathrm{He}$ is supplemented by proton-neutron final-state-interaction phase shifts and mixing parameters, yielding a model-independent d…

Lifetime measurements of some rotational levels by a new recoil method (II) Open

D. Ashery, Neta A. Bahcall, G. Goldring, A. Sprinzak, Yulia Wolfson · 1967

Physics

Lifetime measurements of some rotational levels have been carried out by observing the decay of the excited nuclei along the recoil path following Coulomb excitation with back-scattered oxygen ions. Mean lives were determined for levels in…

Ratios of Electromagnetic Transition Probabilities in low States of Odd A Rotational Nuclei Open

D. Ashery, G. Goldring · 1966

Physics Chemistry

The systematics of M1 and E2 transition probabilities between low lying states in odd A rotational nuclei are reviewed. Some departures are found from strict rotational behaviour in ratios of M1 and E2 transition probabilities in successiv…

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