Study of the process e+e−→ K+K−π0 in the center-of-mass energy range 1.2–2 GeV with the CMD-3 detector

A.l Erofeev ,Yu M Shatunov,E P Solodov,A I Senchenko,D B Shwartz,D.n Shemyakin ,А.і Воробйов ,I.b Logashenko ,D.n Grigoriev ,R.r Akhmetshin ,I A Koop,S.e Gayazov ,A.a Grebenuk ,V Aulchenko ,A Bondar ,Alexei Talyshev ,A Semenov ,P Lukin ,S.s Gribanov ,A.e Kuzmenko ,L.b Epshteyn ,A.v Otboev ,F.v Ignatov ,Y Pestov ,P Krokovny ,D E Berkaev,S Eidelman ,А П Лысенко ,A Korobov ,Г В Федотович ,K Mikhailov ,A.e Ryzhenenkov ,A V Anisenkov,Aleksei Kozyrev ,В Ф Казанин ,A Sibidanov ,A Kuzmin ,N.s Bashtovoy ,B Shwartz ,А.а Рубан ,V.s Okhapkin ,E A Kozyrev,D Epifanov ,V Shebalin ,G.p Razuvaev ,S V Karpov,А С Попов ,A.v Bragin ,V.sh Banzarov ,E A Perevedentsev,В Л Иванов ,В.м Титов ,N.m Ryskulov ,A.n Amirkhanov ,A S Kasaev,Yu V Yudin

doi:10.1051/epjconf/201921204007

Abstract

The process e+ e−→ K+ K−π0 has been studied in the center-of-mass energy range from 1.2 to 2 GeV using a 80.6 pb−1 data sample collected with the CMD-3 detector at the electron-positron collider VEPP-2000. Preliminary results of the cross-section measurement are presented.

Highlights

The process e+e− → K+K−π0 has been studied up to now with low statistical accuracy by the DM2 [1] and BABAR [2] experiments
The data on the total cross section of this process are needed for precise calculation of the hadronic contribution to the muon g − 2 and α(MZ2)
Its tracking system consists of the cylindrical drift chamber (DC) and double-layer multiwire proportional Z-chamber with both subsystems installed inside a thin superconducting solenoid with 1.3 T magnetic field

Summary

Introduction

The process e+e− → K+K−π0 has been studied up to now with low statistical accuracy by the DM2 [1] and BABAR [2] experiments. A detailed study of the production dynamics will improve our understanding of strong interactions at low energies and theoretical models of light hadron production. Its tracking system consists of the cylindrical drift chamber (DC) and double-layer multiwire proportional Z-chamber with both subsystems installed inside a thin superconducting solenoid with 1.3 T magnetic field. Both subsystems are used to generate a trigger signal. The barrel electromagnetic calorimeters placed outside the solenoid are based on liquid xenon (LXe) and CsI crystals with a thickness of 5.4 X0 and. The endcap calorimeter is based on BGO scintillation crystals with a thickness of 13.4 X0

Data analysis

Results

Conclusion and acknowledgments