Sensitive search for resonances in low-energy e+e- scattering

A. L. Hallin; F. P. Calaprice; R. A. McPherson; E. R.J. Saettler

doi:10.1103/PhysRevD.45.3955

Sensitive search for resonances in low-energy e+e- scattering

A. L. Hallin, F. P. Calaprice, R. A. McPherson, E. R.J. Saettler

Physics

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8 Scopus citations

Abstract

We have searched for resonances in e+e- scattering in a range of positron kinetic energies from 1.9 to 2.5 MeV (1.75-1.88 MeV invariant energy). Such resonances would exist if the anomalous electron-positron pairs observed in heavy-ion collisions were due to two-body decay of a neutral object. Our 97% confidence limit excludes resonances with an energy-integrated cross section greater than 0.3 to 2.4 beV/sr, depending upon the incident positron energy. For scalar resonances, this corresponds to a lower limit on the lifetime that varies from 8 × 10-14 to 5 × 10-13 sec. These are the most sensitive limits to date.

Original language	English (US)
Pages (from-to)	3955-3960
Number of pages	6
Journal	Physical Review D
Volume	45
Issue number	11
DOIs	https://doi.org/10.1103/PhysRevD.45.3955
State	Published - 1992

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics

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10.1103/PhysRevD.45.3955

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abstract = "We have searched for resonances in e+e- scattering in a range of positron kinetic energies from 1.9 to 2.5 MeV (1.75-1.88 MeV invariant energy). Such resonances would exist if the anomalous electron-positron pairs observed in heavy-ion collisions were due to two-body decay of a neutral object. Our 97% confidence limit excludes resonances with an energy-integrated cross section greater than 0.3 to 2.4 beV/sr, depending upon the incident positron energy. For scalar resonances, this corresponds to a lower limit on the lifetime that varies from 8 × 10-14 to 5 × 10-13 sec. These are the most sensitive limits to date.",

author = "Hallin, {A. L.} and Calaprice, {F. P.} and McPherson, {R. A.} and Saettler, {E. R.J.}",

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AU - Hallin, A. L.

AU - Calaprice, F. P.

AU - McPherson, R. A.

AU - Saettler, E. R.J.

PY - 1992

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N2 - We have searched for resonances in e+e- scattering in a range of positron kinetic energies from 1.9 to 2.5 MeV (1.75-1.88 MeV invariant energy). Such resonances would exist if the anomalous electron-positron pairs observed in heavy-ion collisions were due to two-body decay of a neutral object. Our 97% confidence limit excludes resonances with an energy-integrated cross section greater than 0.3 to 2.4 beV/sr, depending upon the incident positron energy. For scalar resonances, this corresponds to a lower limit on the lifetime that varies from 8 × 10-14 to 5 × 10-13 sec. These are the most sensitive limits to date.

AB - We have searched for resonances in e+e- scattering in a range of positron kinetic energies from 1.9 to 2.5 MeV (1.75-1.88 MeV invariant energy). Such resonances would exist if the anomalous electron-positron pairs observed in heavy-ion collisions were due to two-body decay of a neutral object. Our 97% confidence limit excludes resonances with an energy-integrated cross section greater than 0.3 to 2.4 beV/sr, depending upon the incident positron energy. For scalar resonances, this corresponds to a lower limit on the lifetime that varies from 8 × 10-14 to 5 × 10-13 sec. These are the most sensitive limits to date.

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Sensitive search for resonances in low-energy e+e- scattering

Abstract

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