Decay Anisotropy of $e^{+}{e}^{-}$ Sources from $pN$ and $pd$ collisions

Abstract

A full calculation of lepton-pair angular characteristics is carried out for $e^{+}{e}^{-}$ pairs created in $pp$, $pn$ and $pd$ collisions at intermediate energies. It is demonstrated that the proposed new observable, the dilepton decay anisotropy, quite sensitively changes for different sources and may be useful for their disentangling. The relevance of the dilepton decay anisotropy is shown in the context of a puzzling energy behavior for the ratio of the lepton yield from $pd$ to $pp$ reactions as observed at the BEVALAC.

8 pages, LaTeX, plus 5 postscript figures tarred, compressed and uuencoded in separate file

References in corpus (2)

• Dilepton Production in Nucleon-Nucleon Interactions
• Dilepton Production in Nucleon-Nucleon Reactions With and Without Hadronic Inelasticities

Cited by in corpus (4)

• Inclusive Dielectron Cross Sections in p+p and p+d Interactions at Beam Energies from 1.04 to 4.88 GeV
• Production of $\omega$ and $\varphi$ Mesons in Near-Threshold $\pi N$ Reactions: Baryon Resonances and Validity of the OZI Rule
• Dilepton anisotropy from $p+Be$ and $Ca+Ca$ collisions at BEVALAC energies
• Bremsstrahlung in intermediate-energy nucleon reactions within an effective one-boson exchange model