%0 Journal Article
%T Study of the e(+)e(-) -> K+K- reaction in the energy range from 2.6 to 8.0 GeV
%A BABAR Collaboration (Lees, J. P. et al
%A Martinez-Vidal, F.
%A Oyanguren, A.
%J Physical Review D
%D 2015
%V 92
%N 7
%I Amer Physical Soc
%@ 1550-7998
%G English
%F BABARCollaborationLees_etal2015
%O WOS:000363014900002
%O exported from refbase (https://references.ific.uv.es/refbase/show.php?record=2413), last updated on Thu, 05 Nov 2015 13:42:29 +0000
%X The e(+)e(-) -> K+K- cross section and charged-kaon electromagnetic form factor are measured in the e(+)e(-) center-of-mass energy range (E) from 2.6 to 8.0 GeV using the initial-state radiation technique with an undetected photon. The study is performed using 469 fb(-1) of data collected with the BABAR detector at the PEP-II2 e(+)e(-) collider at center-of-mass energies near 10.6 GeV. The form factor is found to decrease with energy faster than 1/E-2 and approaches the asymptotic QCD prediction. Production of the K+K- final state through the J/psi and psi(2S) intermediate states is observed. The results for the kaon form factor are used together with data from other experiments to perform a model-independent determination of the relative phases between electromagnetic (single-photon) and strong amplitudes in J/psi and psi(2S). K+K- decays. The values of the branching fractions measured in the reaction e(+)e(-) -> K+K- are shifted relative to their true values due to interference between resonant and nonresonant amplitudes. The values of these shifts are determined to be about +/- 5% for the J/psi meson and +/- 15% for the psi(2S) meson.
%R 10.1103/PhysRevD.92.072008
%U http://arxiv.org/abs/1507.04638
%U https://doi.org/10.1103/PhysRevD.92.072008
%P 072008-16pp