Measurement of the Pion Form Factor with CMD-3 Detector and Its Implication to the Hadronic Contribution to Muon (g-2)

F V Ignatov; R R Akhmetshin; A N Amirkhanov; A V Anisenkov; V M Aulchenko; N S Bashtovoy; D E Berkaev; A E Bondar; A V Bragin; S I Eidelman; D A Epifanov; L B Epshteyn; A L Erofeev; G V Fedotovich; A O Gorkovenko; F J Grancagnolo; A A Grebenuk; S S Gribanov; D N Grigoriev; V L Ivanov; S V Karpov; A S Kasaev; V F Kazanin; B I Khazin; A N Kirpotin; I A Koop; A A Korobov; A N Kozyrev; E A Kozyrev; P P Krokovny; A E Kuzmenko; A S Kuzmin; I B Logashenko; P A Lukin; A P Lysenko; K Yu Mikhailov; I V Obraztsov; V S Okhapkin; A V Otboev; E A Perevedentsev; Yu N Pestov; A S Popov; G P Razuvaev; Yu A Rogovsky; A A Ruban; N M Ryskulov; A E Ryzhenenkov; A V Semenov; A I Senchenko; P Yu Shatunov; Yu M Shatunov; V E Shebalin; D N Shemyakin; B A Shwartz; D B Shwartz; A L Sibidanov; E P Solodov; A A Talyshev; M V Timoshenko; V M Titov; S S Tolmachev; A I Vorobiov; Yu V Yudin; I M Zemlyansky; D S Zhadan; Yu M Zharinov; A S Zubakin; CMD-3 Collaboration

doi:10.1103/PhysRevLett.132.231903

Measurement of the Pion Form Factor with CMD-3 Detector and Its Implication to the Hadronic Contribution to Muon (g-2)

Phys Rev Lett. 2024 Jun 7;132(23):231903. doi: 10.1103/PhysRevLett.132.231903.

Authors

F V Ignatov^{1

2}, R R Akhmetshin^{1

2}, A N Amirkhanov^{1

2}, A V Anisenkov^{1

2}, V M Aulchenko^{1

2}, N S Bashtovoy¹, D E Berkaev^{1

2}, A E Bondar^{1

2}, A V Bragin¹, S I Eidelman^{1

2}, D A Epifanov^{1

2}, L B Epshteyn^{1

2

3}, A L Erofeev^{1

2}, G V Fedotovich^{1

2}, A O Gorkovenko^{1

3}, F J Grancagnolo⁴, A A Grebenuk^{1

2}, S S Gribanov^{1

2}, D N Grigoriev^{1

2

3}, V L Ivanov^{1

2}, S V Karpov¹, A S Kasaev¹, V F Kazanin^{1

2}, B I Khazin¹, A N Kirpotin¹, I A Koop^{1

2}, A A Korobov^{1

2}, A N Kozyrev^{1

2

3}, E A Kozyrev^{1

2}, P P Krokovny^{1

2}, A E Kuzmenko¹, A S Kuzmin^{1

2}, I B Logashenko^{1

2}, P A Lukin^{1

2}, A P Lysenko¹, K Yu Mikhailov^{1

2}, I V Obraztsov^{1

2}, V S Okhapkin¹, A V Otboev¹, E A Perevedentsev^{1

2}, Yu N Pestov¹, A S Popov^{1

2}, G P Razuvaev^{1

2}, Yu A Rogovsky^{1

2}, A A Ruban¹, N M Ryskulov¹, A E Ryzhenenkov^{1

2}, A V Semenov^{1

2}, A I Senchenko¹, P Yu Shatunov¹, Yu M Shatunov¹, V E Shebalin^{1

2}, D N Shemyakin^{1

2}, B A Shwartz^{1

2}, D B Shwartz^{1

2}, A L Sibidanov⁵, E P Solodov^{1

2}, A A Talyshev^{1

2}, M V Timoshenko¹, V M Titov¹, S S Tolmachev^{1

2}, A I Vorobiov¹, Yu V Yudin^{1

2}, I M Zemlyansky¹, D S Zhadan¹, Yu M Zharinov¹, A S Zubakin¹; CMD-3 Collaboration

Affiliations

¹ Budker Institute of Nuclear Physics, SB RAS, Novosibirsk 630090, Russia.
² Novosibirsk State University, Novosibirsk 630090, Russia.
³ Novosibirsk State Technical University, Novosibirsk 630092, Russia.
⁴ Instituto Nazionale di Fisica Nucleare, Sezione di Lecce, Lecce, Italy.
⁵ University of Victoria, Victoria, BC V8W 3P6, Canada.

PMID: 38905689
DOI: 10.1103/PhysRevLett.132.231903

Abstract

The cross section of the process e^{+}e^{-}→π^{+}π^{-} has been measured in the center-of-mass energy range from 0.32 to 1.2 GeV with the CMD-3 detector at the electron-positron collider VEPP-2000. The measurement is based on an integrated luminosity of about 88 pb^{-1}, of which 62 pb^{-1} represent a complete dataset collected by CMD-3 at center-of-mass energies below 1 GeV. In the dominant region near the ρ resonance a systematic uncertainty of 0.7% was achieved. The implications of the presented results for the evaluation of the hadronic contribution to the anomalous magnetic moment of the muon are discussed.