Study of the process $e^+e^-{\to}K^+K^-\eta$ with the CMD-3 detector at the VEPP-2000 collider - INSPIRE

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Study of the process $e^+e^-{\to}K^+K^-\eta$ with the CMD-3 detector at the VEPP-2000 collider

V.L. Ivanov
(
- Novosibirsk, IYF and
- Novosibirsk State U.
)
,
G.V. Fedotovich
(
- Novosibirsk, IYF and
- Novosibirsk State U.
)
,
R.R. Akhmetshin
(
- Novosibirsk, IYF and
- Novosibirsk State U.
)
,
A.N. Amirkhanov
(
- Novosibirsk, IYF and
- Novosibirsk State U.
)
,
A.V. Anisenkov
(
- Novosibirsk, IYF and
- Novosibirsk State U.
)

Jun 19, 2019

25 pages

Published in:

Phys.Lett.B 798 (2019) 134946

Published: Nov 10, 2019

e-Print:

1906.08006 [hep-ex]

DOI:

10.1016/j.physletb.2019.134946 (publication)

PDG:

{{\mathit \phi}{(1680)}}

\rightarrow

{{\mathit \eta}}{{\mathit \phi}}

View in:

ADS Abstract Service

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Abstract: (Elsevier)

The process e+e−→K+K−η has been studied in the center-of-mass energy range from 1.59 to 2.007 GeV using the data sample of 59.5 pb −1 , collected with the CMD-3 detector at the VEPP-2000 e+e− collider in 2011, 2012 and 2017. The K+K−η final state is found to be dominated by the contribution of the ϕ(1020)η intermediate state. The cross section of the process e+e−→ϕ(1020)η has been measured with a systematic uncertainty of 5.1% on the base of 3009 ± 67 selected events. The obtained cross section has been used to calculate the contribution to the anomalous magnetic moment of the muon: aμϕη(E<1.8GeV)=(0.321±0.015stat±0.016syst)×10−10 , aμϕη(E<2.0GeV)=(0.440±0.015stat±0.022syst)×10−10 . From the cross section approximation the ϕ(1680) meson parameters have been determined with better statistical precision, than in previous studies.

muon: magnetic moment
Novosibirsk VEPP-2000
intermediate state
magnetic moment: calculated
meson
energy
dependence
numerical calculations

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Figures(20)

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