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Asymmetry of the Dielectron Emission Rate in an Isospin-Asymmetric Pion MediumKämpfer, B.; Gumalov, T. I.; Titov, A. I.
Asymmetry of the Dielectron Emission Rate in an
Isospin-Asymrnetric Pion Medium
T.I. GULANOVA,1 A. I. TITOV
Bogoliubov Theoretical Laboratory, Joint Institute for Nuclear Research,
141980 Dubna, Russia
Research Center Rossendorf, Institute for Nuclear and Hadron Physics,
PF 510119, 01314 Dresden, Germany
Institute for Theoretical Physics, Technical University Dresden,
Mommsenstr. 13, 01062 Dresden, Germany
The dielectron emission by pion annihilation in an isospin-asymmetric pion gas at finite temperature is considered. Due to the differente between the longitudinal and tramverse parts of the in-medium p meson self-energy a specific asymmetry of the rates is caused for electron pairs with relative momenta perpendicular or parallel to the total pair momentum. This asymmetry may be considered as a sensitive signal of in-medium-modifications of the p properties.
1Permanent- address: Physical and Technical Institute of Uzbek Academy of Sciences, 700084 Tashkent,
- Physics Letters B 372 (1996) pp. 187-192
- Forschungszentrum Rossendorf; FZR-113 Preprint