CVC test in and processes

Autor: A. D. Bukin, V. P. Druzhinin, V. B. Golubev, E. V. Pakhtusova, S. I. Serednyakov, Konstantin Beloborodov
Rok vydání: 2008
Předmět:
Zdroj: Nuclear Physics B - Proceedings Supplements. :306-310
ISSN: 0920-5632
DOI: 10.1016/j.nuclphysbps.2008.09.055
Popis: The combined fitting of the e + e − → K + K − and K S K L cross sections in the energy range from K K ¯ threshold up to 2.15 GeV is done. The fit includes contributions from ρ, ω, ϕ mesons, and their radial and orbital excitations. As a result of the fit, the isovector and isoscalar contributions to the total e + e − → K K ¯ cross section are obtained. The isovector part agrees with the τ → K K ¯ ν spectral function, confirming CVC hypothesis.
Databáze: OpenAIRE