Antiproton Lifetime Limits from Recent Cosmic Ray Measurements - Approximate Analytic Solutions of Heliospheric Cosmic Ray Transport

Details Antiproton Lifetime Limits from Recent Cosmic Ray Measurements - Approximate Analytic Solutions of Heliospheric Cosmic Ray Transport Antiproton Lifetime Limits from Recent Cosmic Ray Measurements - Approximate Analytic Solutions of Heliospheric Cosmic Ray Transport

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aps..apr.m1205k&link_type=abstract

American Physical Society, APS/AAPT Joint Meeting, April 18-21, 1997, abstract #M12.05

Physics

Scientific paper

Laboratory determinations have been made of some of the properties of antimatter, which are, within errors, the charge-conjugated values implied by the corresponding particles. Certain properties, such as the intrinsic decay lifetime, cannot be limited with artificially produced antimatter at a level remotely approaching that possible with matter. The decay lifetime of antiprotons, by the CPT theorem of relativistic quantum field theory, should be the same as the decay lifetime of protons and can be bounded by measurement of the secondary antiprotons produced in our Galaxy. The storage time of these antiprotons is of order 10-100 Myr, but energy-dependent effects reduce the inferred lifetime limit to order 0.1 Myr. The comparison of inferred and expected proton and antiproton spectra must be corrected for heliospheric modulation of the cosmic ray flux. Analytic approximations for the heliospheric transport (including the effects of solar wind convection, adiabatic deceleration, magnetic curvature drift, and stochastic diffusion in turbulent magnetic fields) can be obtained.

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