Study of the Process e+ e- ---> eta gamma in c.m. Energy Range 600-1380 MeV at CMD-2

The CMD-2 collaboration Akhmetshin, R.R. ; Anashkin, E.V. ; Aulchenko, V.M. ; et al.
Phys.Lett.B 509 (2001) 217-226, 2001.
Inspire Record 554522 DOI 10.17182/hepdata.27025

The cross section of the process e+ e- ---> eta gamma has been measured in the 600-1380 MeV c.m. energy range with the CMD-2 detector. The following branching ratios have been determined: B(rho ---> eta gamma) = (3.28 +- 0.37 +- 0.23) 10^{-4}, B(omega ---> eta gamma) = (5.10 +- 0.72 +- 0.34) 10^{-4}, B(phi --> eta gamma) = (1.287 +- 0.013 +- 0.063) 10^{-2}. Evidence for the rho'(1450) ---> eta gamma decay has been obtained for the first time.

1 data table

The measured Born cross section for the ETA GAMMA final state.


Study of the process e+e- to pi+pi-pi+pi-pi0 with CMD-2 detector

The CMD-2 collaboration Akhmetshin, R.R. ; Anashkin, E.V. ; Aulchenko, V.M. ; et al.
Phys.Lett.B 489 (2000) 125-130, 2000.
Inspire Record 532970 DOI 10.17182/hepdata.28019

The process e+e- to pi+ pi- pi+ pi- pi0 has been studied in the center of mass energy range 1280 -- 1380 MeV using 3.0 1/pb of data collected with the CMD-2 detector in Novosibirsk. Analysis shows that the cross section of the five pion production is dominated by the contributions of the eta pi+pi- and omega pi+pi- intermediate states.

3 data tables

Axis error includes +- 15/15 contribution.

Axis error includes +- 15/15 contribution.

Axis error includes +- 15/15 contribution.


Observation of multihadronic events in e+ e- collisions at the energy of 1.18-1.34 gev

Kurdadze, L.M. ; Onuchin, A.P. ; Serednyakov, S.I. ; et al.
Phys.Lett.B 42 (1972) 515-518, 1972.
Inspire Record 84975 DOI 10.17182/hepdata.28190

Using the electron-positron storage ring VEPP-2 multipionic events have been observed at a total energy of 1.18–1.34 GeV. The experimental cross-section appears to be considerably larger than calculated within the framework of the vector dominance model for the processes e + e − → ϱπ , ϱϵ , ωπ , A 1 π . The data on the total cross-section obtained in the framework of the statistical model with 4 pions are presented.

1 data table

DATA VALUES MEASURED OFF GRAPH IN JOURNAL. VALUES OF R CALCULATED FROM TOTAL MULTIHADRONIC CROSS SECTION.


Measurement of the electron-positron annihilation cross-section into pi+ pi-, k+ k- pairs at the total energy 1.18-1.34 gev

Balakin, V.E. ; Budker, G.I. ; Kurdadze, L.M. ; et al.
Phys.Lett.B 41 (1972) 205-208, 1972.
Inspire Record 75634 DOI 10.17182/hepdata.28229

Using the electron-position storage ring VEPP-2 an experiment has been performed in which the cross-sections of the reactions e + e − → π + π − and e + e − →K + K − were measured in the energy regi on 1.18–1.34 GeV. The experimental values of the formfactors lie higher than curves extrapolated from the ϱ- and ϕ-meson region.

2 data tables

No description provided.

No description provided.


Pion Form-Factor Measurement by e+ e- --> pi+ pi- in the Energy Range 2 e from 0.78-GeV Up to 1.34-GeV

Bukin, A.D. ; Vasserman, I.B. ; Koop, I.A. ; et al.
Phys.Lett.B 73 (1978) 226-228, 1978.
Inspire Record 134220 DOI 10.17182/hepdata.27474

The cross section of the reaction e + e − → π + π − has been measured in the energy range 2 E from 0.78 up to 1.34 GeV. The obtained experimental values of the pion form factor exceed notably the ρ -meson tail.

1 data table

No description provided.


PRODUCTION OF POSITIVE PIONS ON POLARIZED PROTONS BY LINEARLY POLARIZED PHOTONS IN THE ENERGY REGION 300-MEV - 420-MEV. (IN RUSSIAN)

Getman, V.A. ; Gorbenko, V.G. ; Grushin, V.F. ; et al.
Yad.Fiz. 32 (1980) 1008-1019, 1980.
Inspire Record 159789 DOI 10.17182/hepdata.18891

None

6 data tables

SEE ABBREVIATIONS IN CR.

SEE ABBREVIATIONS IN CR.

SEE ABBREVIATIONS IN CR.

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Recent Results of Experiments at VEPP-2M

Sidorov, V. ;
eConf C790823 (1979) 490, 1979.
Inspire Record 149218 DOI 10.17182/hepdata.75440

None

2 data tables

No description provided.

No description provided.


Measurement of the Charged Kaon Form-factor in the Energy Range 1.0-{GeV} to 1.4-{GeV}

Ivanov, P.M. ; Kurdadze, L.M. ; Lelchuk, M.Yu. ; et al.
Phys.Lett.B 107 (1981) 297-300, 1981.
Inspire Record 173076 DOI 10.17182/hepdata.31025

The cross section of the reaction e + e − → K + K − has been measured at the electron-positron storage ring VEPP-2M in the c.m. energy range 1.0–1.4 GeV. At energies above 1.15 GeV the experimental values of the charged kaon form factor considerably exceed the predictions of the simplest vector dominance model with ϱ, ω, ψ mesons.

1 data table

No description provided.


POLARIZATION PARAMETERS SIGMA, T, P FOR THE REACTION GAMMA P ---> P PI0 NEAR THE FIRST RESONANCE. (IN RUSSIAN)

Belyaev, A.A. ; Getman, V.A. ; Gorbenko, V.G. ; et al.
Yad.Fiz. 35 (1982) 693-699, 1982.
Inspire Record 179827 DOI 10.17182/hepdata.18756

None

2 data tables

No description provided.

No description provided.


EXPERIMENTAL STUDIES OF THE SIGMA, T, P POLARIZATION PARAMETERS AND THE GAMMA P ---> P PI0 REACTION MULTIPOLE ANALYSIS IN THE FIRST RESONANCE REGION

Belyaev, A.a. ; Getman, V.a. ; Gorbenko, V.g. ; et al.
Nucl.Phys.B 213 (1983) 201-222, 1983.
Inspire Record 192457 DOI 10.17182/hepdata.34021

A description is given of the experimental techniques and investigation results of the parameters Σ , T , P for the γ p→p π 0 reaction using linear polarized photons and a polarized proton target. The measurements have been made in the photon energy range 280–450 MeV at pion c.m. angles between 60° and 135°. The new experimental data are used in an energy-independent channel multipole analysis without the Watson theorem.

8 data tables

No description provided.

No description provided.

No description provided.

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