Abstract

Recent results on e+e−annihilation to hadrons from SND experiment at VEPP-2000 collider are presented. Corresponding data set is about 200 pb−1 of integrated luminosity collected at the energy region below 2 GeV. The processes e+e− → π+π− , π0γ, ωπ0, π+π−π0, ηπ+π−π0, η, π+π−4π0 have been studied. Searches for e+e− annihilation to C-even resonances η and f1(1285) were done.

Highlights

  • The spherical neutral detector SND [1, 2] is a general purpose nonmagnetic detector

  • SND is operating at VEPP-2000 [4] e+e− collider and collected about 200 pb−1 in the center-of-mass energy range from 0.2 to 2.0 GeV

  • 1.4 GeV the cross section is about 50 pb and agrees with previous SND and CMD-2 measurements at VEPP-2M [10, 11]

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Summary

Introduction

The spherical neutral detector SND [1, 2] is a general purpose nonmagnetic detector. SND consists of the tracking system based on cylindrical drift and proportional chambers placed in a common gas volume, aerogel threshold counters [3], calorimeter and muon system based on proportional tubes and plastic scintillator. SND is operating at VEPP-2000 [4] e+e− collider and collected about 200 pb−1 in the center-of-mass energy range from 0.2 to 2.0 GeV. Cross section was measured in the energy range The measurement is based on data with an integrated luminosity of 5 pb−1.

Results
Conclusion

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