Please use this identifier to cite or link to this item: http://hdl.handle.net/2445/131829
Title: Precision measurement of the e+e- → K+K-(γ) cross section with the initial-state radiation method at BABAR
Author: Graugés Pous, Eugeni
BABAR Collaboration
Keywords: Física de partícules
Experiments
Mesuraments físics
Particle physics
Experiments
Physical measurements
Issue Date: 27-Aug-2013
Publisher: American Physical Society
Abstract: A precise measurement of the cross section for the process e + e − → K + K − ( γ ) from threshold to an energy of 5 GeV is obtained with the initial-state radiation (ISR) method using 232     fb − 1 of data collected with the BABAR detector at e + e − center-of-mass energies near 10.6 GeV. The measurement uses the effective ISR luminosity determined from the e + e − → μ + μ − ( γ ) γ ISR process with the same data set. The corresponding lowest-order contribution to the hadronic vacuum polarization term in the muon magnetic anomaly is found to be a K K , LO μ = ( 22.93 ± 0.18 stat ± 0.22 syst ) × 10 − 10 . The charged kaon form factor is extracted and compared to previous results. Its magnitude at large energy significantly exceeds the asymptotic QCD prediction, while the measured slope is consistent with the prediction.
Note: Reproducció del document publicat a: https://doi.org/10.1103/PhysRevD.88.032013
It is part of: Physical Review D, 2013, vol. 88, num. 3, p. 032013
URI: http://hdl.handle.net/2445/131829
Related resource: https://doi.org/10.1103/PhysRevD.88.032013
ISSN: 1550-7998
Appears in Collections:Articles publicats en revistes (Física Quàntica i Astrofísica)

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