# Experimental input from $e^+e^-$ machines to hadronic contribution to muon (g-2)

### Submission summary

 As Contributors: Boris Shwartz Preprint link: scipost_201811_00021v2 Date accepted: 2019-01-17 Date submitted: 2018-12-14 Submitted by: Shwartz, Boris Submitted to: SciPost Physics Proceedings Proceedings issue: The 15th International Workshop on Tau Lepton Physics (Amsterdam, 2018-09) Domain(s): Experimental Subject area: Quantum Physics

### Abstract

Precise study of the hadrons production in $e^+e^-$ annihilation at low energies provides important information about interactions of light quarks and spectroscopy of their bound states. These studies are especially important for theoretical calculations of the muon $(g-2)$ via the Standard Model because of the present difference between theoretical and experimental values exceeds three standard deviations. In this report we will discuss current status and recent results obtained by the CMD-3 experiment and will give a brief look to status of the BaBar and Belle II experiments.

###### Current status:

Dear Prof.Onderwater, dear colleagues,

Thank you very much for careful reading and corrections.
The corrected versions is attached. Best regards, Sorry, but my contribution

Boris.

### List of changes

Usage of articles can be improved somewhat:
"... it is clear that THE low energy range provides THE dominant contribution to this value."

corrected

"Until 2010 *the* precise data on the hadronic cross sections obtained in the energy scan
mode were provided by experiments at THE VEPP-2M collider " -> scrap first 'the'

corrected

"THE new VEPP-2000 e+e− collider for the center-of-mass energy range from 0.3 to 2 GeV
has been operating at BINP"

corrected

"A special system based on the Compton back scattering ..."

corrected

"Then experiments at VEPP-2000 were resumed in 2017 after A three year shutdown taken for THE new intensive positron injection source implementation as well as for AN upgrade of THE 1 GeV booster."

corrected

"... a compact multipurpose detector COMBINING magnetic spectrometry with high resolution calorimetry"
"THE main instrument of the SND detector, ... , is A high resolution calorimeter ..."
"THE dominant contribution to the ahμ value ..."

corrected

"... cross section is AN important part of the experiments ..."

corrected

Fig. 3: slight cut-off on the top-left

figure corrected

"However, other channels, for example 2(π+π−), DO not demonstrate ..."

corrected

sublect -> subject

corrected

Caption fig. 7: "... process measured by *the* CMD-3" -> remove 'the' (same in caption fig. 8 for *the* SND).
Also caption fig. 7: "THE vertical lineS indicate the pp ̄and nn ̄ thresholds ..." Note: 'and' inside math-mode.

corrected

"The VEPP-2000 resumed operation in 2017 after A three year shutdown taken for new intensive positron injection source implementation as well as to upgrade THE 1 GeV booster."

corrected

### Submission & Refereeing History

Resubmission scipost_201811_00021v2 on 14 December 2018
Submission scipost_201811_00021v1 on 15 November 2018