Study of the process $e^+e^-\to p\bar{p}$ in the c.m. energy range from threshold to 2 GeV with the CMD-3 detector

R R Akhmetshin,A N Amirkhanov,Alexey Anisenkov,V Aulchenko,V Sh Banzarov,N S Bashtovoy,D E Berkaev, A Bondar,A V Bragin,S Eidelman,D Epifanov, L B Epshteyn,A L Erofeev,G V Fedotovich, S E Gayazov,A A Grebenuk,S S Gribanov,D N Grigoriev,E M Gromov,F V Ignatov,V Ivanov,Sergey Karpov, A S Kasaev,V F Kazanin,B I Khazin, A N Kirpotin,I A Koop, Oleksandr Kovalenko,A N Kozyrev,E A Kozyrev,P Krokovny, A E Kuzmenko,A Kuzmin,I B Logashenko,P Lukin,K Yu Mikhailov,V S Okhapkin,A V Otboev,Y Pestov,S G Pivovarov,A S Popov,G P Razuvaev,A L Romanov,A A Ruban,N M Ryskulov, A E Ryzhenenkov,V Shebalin,D N Shemyakin,B Shwartz,D B Shwartz,A Sibidanov,Yu M Shatunov,E P Solodov,V M Titov,Alexey Talyshev, A I Vorobiov,Yu V Yudin,Yu M Zharinov

Physics Letters B（2015）

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摘要

Using a data sample of 7.7pb−1 collected with the CMD-3 detector at the VEPP-2000 e+e− collider we select about 2900 events of the process e+e−→pp¯ and measure its cross section at 12 energy points with about 6% systematic uncertainty. From the angular distribution of produced nucleons we obtain the ratio GE/GM.

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