The results of the experiment on the measurement of the e+e− → π+π− cross section in a cm energy range of 370–520 MeV are presented. The systematic measurement error is equal to 0.7%. In the vector ...dominance model, the pion electromagnetic radius is calculated using all the CMD-2 data on the pion form factor. The cross section for the production of a muon pair is measured in the energy range of the experiment.
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, SIK, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
We present a measurement of the pion form factor based on e+e− annihilation data from the CMD-2 detector in the energy range 0.6<s<1.0 GeV with a systematic uncertainty of 0.8%. A data sample is five ...times larger than that used in our previous measurement.
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GEOZS, IJS, IMTLJ, KILJ, KISLJ, NUK, OILJ, PNG, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
The updated results of the precise measurements of the processes e+e−→ρ→π+π−, e+e−→ω→π+π−π0 and e+e−→φ→K0LK0S performed by the CMD-2 Collaboration are presented. The update appeared necessary due to ...an overestimate of the integrated luminosity in previous analyses.
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IJS, IMTLJ, KILJ, KISLJ, NUK, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
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IJS, IMTLJ, KILJ, KISLJ, NUK, SBCE, SBJE, UL, UM, UPCLJ, UPUK
6.
Study of Φ → π+π-π0 with CMD-2 detector AKHMETSHIN, R. R; AULCHENKO, V. M; FEDOTOVICH, G. V ...
Physics letters. B,
2006, Volume:
642, Issue:
3
Journal Article
Peer reviewed
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IJS, IMTLJ, KILJ, KISLJ, NUK, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Results of the measurement of the φ meson parameters with the general purpose detector CMD-2 at the upgraded
e
+
e
− collider VEPP-2M at Novosibirsk are presented. This is the first measurement of ...the four major φ decay modes in a single
e
+
e
− experiment. The results based on about 55,600 identified hadronic events are consistent with previous measurements, and have precision comparable to the current world average.
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IJS, IMTLJ, KILJ, KISLJ, NUK, SBCE, SBJE, UL, UM, UPCLJ, UPUK
Radiative decays of the
φ meson have been studied using a data sample of about 20 million
φ decays collected by the CMD-2 detector at VEPP-2M collider in Novosibirsk. From selected
e
+
e
−→
π
+
π
−
γ ...events the
φ→
π
+
π
−
γ decay has been observed for the first time. Under the assumption that the intermediate
f
0(980)
γ state dominates in the
φ→
π
+
π
−
γ decay, the corresponding branching ratio is
Br(
φ→
f
0(980)
γ)=(1.93±0.46±0.50)×10
−4. Selected
e
+
e
−→
μ
+
μ
−
γ events were used to obtain
Br(
φ→
μ
+
μ
−
γ)=(1.43±0.45±0.14)×10
−5 for
E
γ
>20 MeV. Using the same data sample, upper limits at 90% CL have been obtained for the C-violating decay of the
φ:
Br(
φ→
ργ)<1.2×10
−5; and for the P- and CP-violating decay of the
η:
Br(
η→
π
+
π
−)<3.3×10
−4.
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IJS, IMTLJ, KILJ, KISLJ, NUK, SAZU, SBCE, SBJE, UL, UM, UPCLJ, UPUK
The CMD-2 cryogenic magnetic detector Anashkin, E. V.; Aul’chenko, V. M.; Akhmetshin, R. R. ...
Instruments and experimental techniques (New York),
12/2006, Volume:
49, Issue:
6
Journal Article
Peer reviewed
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DOBA, EMUNI, FIS, FZAB, GEOZS, GIS, IJS, IMTLJ, IZUM, KILJ, KISLJ, MFDPS, NLZOH, NUK, OILJ, PILJ, PNG, SAZU, SBCE, SBJE, SBMB, UILJ, UKNU, UL, UM, UPUK, VKSCE, ZAGLJ
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