Studying the scale and q2 dependence of K+→π+e+e− decay

pi^+e^+e^- amplitude scale at q^2=0 from the recent Brookhaven E865 high-statistics data. We find that the q^2=0 scale is fitted in excellent agreement with the theoretical long-distance amplitude. Lastly, we find that the observed q^2 shape is explained by the combined effect of the pion and kaon form-factor vector-meson-dominance rho, omega and phi poles, and a charged pion loop coupled to a virtual photon-->e^+e^- transition.
Comment: 8 pages, 3 figures -->
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)00656-6
Přístupová URL adresa: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::68cae30ba535047cafa5c16cb3551bcf
https://doi.org/10.1016/s0370-2693(01)00656-6
Rights: OPEN
Přírůstkové číslo: edsair.doi.dedup.....68cae30ba535047cafa5c16cb3551bcf
Autor: Michael D. Scadron, J. Lowe, H. Burkhardt, Gad Eilam
Rok vydání: 2001
Předmět:
Zdroj: Physics Letters B. 512:317-322
ISSN: 0370-2693
DOI: 10.1016/s0370-2693(01)00656-6
Popis: We extract the K^+-->pi^+e^+e^- amplitude scale at q^2=0 from the recent Brookhaven E865 high-statistics data. We find that the q^2=0 scale is fitted in excellent agreement with the theoretical long-distance amplitude. Lastly, we find that the observed q^2 shape is explained by the combined effect of the pion and kaon form-factor vector-meson-dominance rho, omega and phi poles, and a charged pion loop coupled to a virtual photon-->e^+e^- transition.
Comment: 8 pages, 3 figures
Databáze: OpenAIRE
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