Study of the process $e^+e^- \rightarrow \eta \eta \gamma $ in the energy range $\sqrt{s} = \text{1.17--2.00 }$ GeV with the SND detector

Achasov, M.N.; Barnyakov, A.Yu.; Beloborodov, K.I.; Berdyugin, A.V.; Berkaev, D.E.; Bogdanchikov, A.G.; Botov, A.A.; Dimova, T.V.; Druzhinin, V.P.; Kirpotin, A.N.

doi:10.1140/epjc/s10052-022-10102-9

Study of the process $e^+e^- \rightarrow \eta \eta \gamma$ in the energy range $\sqrt{s} = \text{1.17--2.00 }$ GeV with the SND detector

SND

Collaboration

•

M.N. Achasov
(
- Novosibirsk, IYF and
- Novosibirsk State U.
)

Oct 12, 2021

6 pages

Published in:

Eur.Phys.J.C 82 (2022) 2, 168

Published: Feb 23, 2022

e-Print:

2110.05845 [hep-ex]

DOI:

10.1140/epjc/s10052-022-10102-9

PDG:

{{\mathit \rho}{(1700)}}

\rightarrow

{{\mathit f}_{{{0}}}{(1500)}}{{\mathit \gamma}}

Experiments:

NOVOSIBIRSK-SND

View in:

ADS Abstract Service

reference search8 citations

Citations per year

Abstract: (Springer)

The process

e^+e^-\rightarrow \eta \eta \gamma

is studied in the center-of-mass energy range 1.17–2.00 GeV using data with an integrated luminosity of 201 pb

^{-1}

collected by the SND detector at the VEPP-2000

e^+e^-

collider. The

e^+e^-\rightarrow \eta \eta \gamma

cross section is measured for the first time. It is shown that the dominant mechanism of this reaction is the transition through the

\phi \eta

intermediate state. Our result on the

e^+e^-\rightarrow \eta \eta \gamma

cross section is consistent with the

e^+e^-\rightarrow \phi \eta

measurement in the

\phi \rightarrow K^+ K^-

mode. The search for radiative processes contributing to the

e^+e^-\rightarrow \eta \eta \gamma

cross section is performed, and no significant signal is observed.

Note:

6 pages, 3 figures, to be submitted to European Physical Journal C. arXiv admin note: text overlap with arXiv:2006.05465

electron positron: annihilation
electron positron: colliding beams
eta: pair production
photon: associated production
channel cross section: measured
SND
intermediate state
Novosibirsk VEPP-2000
experimental results
electron positron --> 2eta photon

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Study of the process e+e−→ηηγe^+e^- \rightarrow \eta \eta \gamma e+e−→ηηγ in the energy range s=1.17–2.00 \sqrt{s} = \text{1.17--2.00 }s​=1.17–2.00 GeV with the SND detector

Citations per year

Study of the process $e^+e^- \rightarrow \eta \eta \gamma$ in the energy range $\sqrt{s} = \text{1.17--2.00 }$ GeV with the SND detector