Isoscalar and isovector kaon form factors from e+e− and τ data

Konstantin Beloborodov; Vladimir Druzhinin; Sergey Serednyakov

doi:10.1051/epjconf/201921203006

EPJ

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Proceedings

Open Access

EPJ Web of Conferences 212, 03006 (2019)
https://doi.org/10.1051/epjconf/201921203006

Isoscalar and isovector kaon form factors from e⁺e⁻ and τ data

Konstantin Beloborodov¹^,2^*, Vladimir Druzhinin¹^,2 and Sergey Serednyakov¹^,2

¹ Budker Institute of Nuclear Physics, 630090 Novosibirsk, Russia
² Novosibirsk State University, 630090 Novosibirsk, Russia

^* e-mail: K.I.Beloborodov@inp.nsk.su

Published online: 17 June 2019

Abstract

The recent precise measurements of the e⁺e⁻→ K_S K_L and e⁺e⁻→ K⁺K⁻ cross sections and the hadronic spectral function of the τ⁻→ K⁻K_S ν_τ decay are used to extract the isoscalar and isovector electromagnetic kaon form factors and their relative phase in a model independent way. The experimental results are compared with a fit based on the vector-meson-dominance model.

© The Authors, published by EDP Sciences, 2019

This is an open access article distributed under the terms of the Creative Commons Attribution License 4.0 (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.