Precision Measurements of the Charged Pion, Charged Kaon, and Proton Electromagnetic Form Factors at s = 13.48 GeV^2

Details Precision Measurements of the Charged Pion, Charged Kaon, and Proton Electromagnetic Form Factors at s = 13.48 GeV^2 Precision Measurements of the Charged Pion, Charged Kaon, and Proton Electromagnetic Form Factors at s = 13.48 GeV^2

2005-12-20

arxiv.org/abs/hep-ex/0512050v2

Physics

High Energy Physics

High Energy Physics - Experiment

3 pages, 2 figures, contributed to PANIC05

Scientific paper

10.1063/1.2220265

Using 20.7 pb^-1 of e+e- annihilation data taken at sqrt{s} = 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 |Q^2| = 13.48 GeV^2 by the reaction e+e- -> h+h-. The measurements are the first ever with identified pions and kaons of |Q^2| > 4 GeV^2, with the results |F_pi(13.48 GeV^2)| = 0.075 +- 0.008(stat) +- 0.005(syst) and |F_K(13.48 GeV^2)| = 0.063 +- 0.004(stat) +- 0.001(syst). The result for the proton, assuming |G^p_E| = |G^p_M|, is |G^p_M(13.48 GeV^2)| = 0.014 +- 0.002(stat) +- 0.001(syst), which is in agreement with earlier results.

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