Precision Measurements of the Charged Pion, Charged Kaon, and Proton Electromagnetic Form Factors at s = 13.48 GeV2
Abstract
Using 20.7 pb-1 of e+e- annihilation data taken at sqrts = 3.671 GeV with the CLEO-c detector, precision measurements of the electromagnetic form factors of the charged pion, charged kaon, and proton have been made for timelike momentum transfers of |Q2| = 13.48 GeV2 by the reaction e+e- -> h+h-. The measurements are the first ever with identified pions and kaons of |Q2| > 4 GeV2, with the results |Fpi(13.48 GeV2)| = 0.075 +- 0.008(stat) +- 0.005(syst) and |FK(13.48 GeV2)| = 0.063 +- 0.004(stat) +- 0.001(syst). The result for the proton, assuming |GpE| = |GpM|, is |GpM(13.48 GeV2)| = 0.014 +- 0.002(stat) +- 0.001(syst), which is in agreement with earlier results.
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