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Experimental input from $e^+e^-$ machines to hadronic contribution to muon (g-2)
by M.N. Achasov, R.R. Akhmetshin, A.N. Amirkhanov, A.V. Anisenkov, V.M. Aulchenko, V.Sh. Banzarov, A.Yu. Barnyakov, N.S. Bashtovoy, K.I. Beloborodov, A.V. Berdyugin, D.E. Berkaev, A.G. Bogdanchikov, A.E. Bondar, A.A. Botov, A.V. Bragin, T.V. Dimova, V.P. Druzhinin, S.I. Eidelman, D.A. Epifanov, L.B. Epshteyn, A.L. Erofeev, G.V. Fedotovich, S.E. Gayazov, V.B. Golubev, A.A. Grebenuk, S.S. Gribanov, D.N. Grigoriev, F.V. Ignatov, V.L. Ivanov, L.V. Kardapoltsev, S.V. Karpov, V.F. Kazanin, A.G. Kharlamov, A.N. Kirpotin, I.A. Koop, A.A. Korol, A.A. Korobov, S.V. Koshuba, A.N. Kozyrev, E.A. Kozyrev, D.P. Kovrizhin, P.P. Krokovny, A.S. Kupich, A.E. Kuzmenko, A.S. Kuzmin, R.A. Litvinov, I.B. Logashenko, P.A. Lukin, K.A. Martin, N.A. Melnikova, K.Yu. Mikhailov, A.E. Obrazovsky1, V.S. Okhapkin1, A.V. Otboev1, E.V. Pakhtusova1, Yu.N. Pestov1, A.S. Popov1,2, K.V. Pugachev1,2, G.P. Razuvaev1,2, A.A. Ruban1, N.M. Ryskulov1, A.E. Ryzhenenkov1,2, A.I. Senchenko1, S.I. Serednyakov1,2, Yu.M. Shatunov1, P.Yu. Shatunov, V.E. Shebalin, D.N. Shemyakin, D.A. Shtol, B.A. Shwartz*, D.B. Shwartz, A.L. Sibidanov, Z.K. Silagadze, E.P. Solodov, I.K. Surin, A.A. Talyshev, V.M. Titov, S.S. Tolmachev, A.I. Vorobiov, I.M. Zemlyansky, Yu.V. Yudin
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Submission summary
| Authors (as registered SciPost users): | Tatyana Dimova · Boris Shwartz |
| Submission information | |
|---|---|
| Preprint Link: | scipost_201811_00021v1 (pdf) |
| Date submitted: | 2018-11-15 01:00 |
| Submitted by: | Shwartz, Boris |
| Submitted to: | SciPost Physics Proceedings |
| Proceedings issue: | The 15th International Workshop on Tau Lepton Physics (TAU2018) |
| Ontological classification | |
|---|---|
| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
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:
Reports on this Submission
Report 1 by Gerco Onderwater on 2018-12-4 (Invited Report)
- Cite as: Gerco Onderwater, Report on arXiv:scipost_201811_00021v1, delivered 2018-12-04, doi: 10.21468/SciPost.Report.702
Strengths
- addresses an important issue in the determination of the relative hadron production cross section R(s), necessary for, among other, the determination of the hadronic correction to a(mu)
- concise sketch of the context and the experimental setup
- more in-depth discussion of some preliminary new experimental results.
Report
Very topical and to-the-point summary of interesting new results from the recently upgraded VEPP-2000 facility, and elsewhere. Good and concise sketch of the context and general experiment features. More in-depth discussion of new results and how they were obtained.
Requested changes
Usage of articles can be improved somewhat:
"... it is clear that THE low energy range provides THE dominant contribution to this value."
"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'
"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"
"A special system based on the Compton back scattering ..."
"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."
"... 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 ..."
"... cross section is AN important part of the experiments ..."
Fig. 3: slight cut-off on the top-left
"However, other channels, for example 2(π+π−), DO not demonstrate ..."
sublect -> subject
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.
"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."