TY  - JOUR
AU  - BABAR Collaboration (Lees, J. P. et al
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
PY  - 2015
DA  - 2015//
TI  - Study of the e(+)e(-) -> K+K- reaction in the energy range from 2.6 to 8.0 GeV
T2  - Phys. Rev. D
JO  - Physical Review D
SP  - 072008
EP  - 16pp
VL  - 92
IS  - 7
PB  - Amer Physical Soc
AB  - 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.
SN  - 1550-7998
UR  - http://arxiv.org/abs/1507.04638
UR  - https://doi.org/10.1103/PhysRevD.92.072008
DO  - 10.1103/PhysRevD.92.072008
LA  - English
N1  - WOS:000363014900002
ID  - BABARCollaborationLees_etal2015
ER  -