Update of the e^+e^-\to\pi^+\pi^- cross section measured by SND detector in the energy region 400<\sqrt{s}<1000 MeV
M.N.Achasov, K.I.Beloborodov, A.V.Berdyugin, A.G.Bogdanchikov,, A.V.Bozhenok, A.D.Bukin, D.A.Bukin, T.V.Dimova, V.P.Druzhinin, V.B.Golubev,, A.A.Korol, S.V.Koshuba, E.V.Pakhtusova, S.I.Serednyakov, Yu.M.Shatunov,, V.A.Sidorov, Z.K.Silagadze, A.N.Skrinsky, Yu.A.Tikhonov
TL;DR
This paper presents an updated measurement of the e^+e^- to pi^+pi^- cross section in the 400-1000 MeV energy range, correcting previous data due to flaws in Monte Carlo event generators used in analysis.
Contribution
It provides a corrected cross section measurement for e^+e^- to pi^+pi^- in a specific energy range, improving the accuracy of previous results.
Findings
Updated cross section data with corrections applied.
Identification and correction of flaws in Monte Carlo generators.
Enhanced precision in e^+e^- to pi^+pi^- measurements.
Abstract
The corrected cross section of the e^+e^-\to\pi^+\pi^- process measured in the SND experiment at the VEPP-2M e^+e^- collider is presented. The update is necessary due to a flaw in the e^+e^-\to\pi^+\pi^- and e^+e^-\to\mu^+\mu^- Monte Carlo events generators used previously in data analysis.
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