Ivanov, P M
E+ E- --> PI+ PI-
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Measurement of the Pion Form-factor in the Timelike Region for $q^2$ Values Between .1-{GeV}/$c^2$ and .18-{GeV}/$c^2$

Amendolia, S.R. ; Badelek, B. ; Batignani, G. ; et al.
Phys.Lett.B 138 (1984) 454-458, 1984.
Inspire Record 195944 DOI 10.17182/hepdata.30572

The EM form factor of the pion has been studied in the time-like region by measuring σ (e + e − → π + π − ) normalized to σ (e + e − → μ + μ − ). Results have been obtained for q 2 down to the physical threshold.

1 data table
Table 1

No description provided.


MEASUREMENT OF THE PION FORM-FACTOR NEAR THE THRESHOLD OF THE REACTION e+ e- ---> pi+ pi- WITH A TIME-OF-FLIGHT DETECTOR

Vasserman, I.B. ; Ivanov, P.M. ; Kezerashvili, G.Ya. ; et al.
SLAC-TRANS-0196, 1981.
Inspire Record 164524 DOI 10.17182/hepdata.37120

None

1 data table
Table 1

RADIATIVE CORRECTIONS APPLIED.


Version 2
Pion Form-factor Measurement in the Reaction $e^+ e^- \to \pi^+ \pi^-$ for Energies Within the Range From 0.4-{GeV} to 0.46-{GeV}

Vasserman, I.B. ; Ivanov, P.M. ; Kezerashvili, G.Ya. ; et al.
Yad.Fiz. 33 (1981) 709-714, 1981.
Inspire Record 167191 DOI 10.17182/hepdata.18823

None

1 data table
Table 1

Measured value of the total E+ E- --> PI+ PI- cross section


MEASUREMENTS OF THE EM TIMELIKE FORM-FACTORS FOR KAON AND PION AT S**(1/2) = 1.5-GEV

Esposito, B. ; Marini, A. ; Piano Mortari, Giovanni ; et al.
Lett.Nuovo Cim. 28 (1980) 337-342, 1980.
Inspire Record 158283 DOI 10.17182/hepdata.37369

None

1 data table
Table 1

No description provided.


Pion Form-Factor Measurement from e+ e- --> pi+ pi- Near Threshold by electron-Positron Colliding Beams

Vasserman, I.B. ; Ivanov, P.M. ; Koop, I.A. ; et al.
Yad.Fiz. 28 (1978) 968-971, 1978.
Inspire Record 136394 DOI 10.17182/hepdata.19016

None

1 data table
Table 1

No description provided.


rivet Analysis
Pion Form-Factor from 480-MeV to 1100-MeV

Quenzer, A. ; Ribes, M. ; Rumpf, F. ; et al.
Phys.Lett.B 76 (1978) 512-516, 1978.
Inspire Record 134061 DOI 10.17182/hepdata.27443

The pion form factor is measured in the reaction e + e − → π + π − for center of mass energies in the range 480–1100 MeV. Our results are first analysed in terms of the conventional Vector Meson Dominance formalism, and then taking into account the ωπ inelastic channel. The result of this later formalism is a pion form factor ( F π ) which fits quite well all the existing data on F π both in the timelike and spacelike regions, and pion mean square radius of 〈 r π 2 〉 = 0.460 ± 0.011 fm 2 or 〈r π 2 〉 1 2 = 0.678 ± 0.008 fm .

1 data table
Table 1

No description provided.


Momentum Analysis of Kaon and Pion Pairs Produced from Timelike Photons at 1.6-GeV Energy

Esposito, B. ; Felicetti, F. ; Marini, A. ; et al.
Phys.Lett.B 67 (1977) 239-242, 1977.
Inspire Record 124109 DOI 10.17182/hepdata.27574

We present results for the total cross section of e + e − annihilation into two hadrons at 1.6 GeV: σ ππ = σ KK = (1.8 ± 1.1) × 10 -33 cm 2 .From these values we obtain the time-like electromagnetic form factors these mesons: | F π | 2 = 0.24 ± 0.14 and | F K | 2 = 0.46 ± 0.26.

1 data table
Table 1

No description provided.


Measurement of the electron-Positron Annihilation Cross-Section Into pi+ pi- at the Energies 915-MeV, 990-MeV and 1076-MeV

Cosme, G. ; Courau, A. ; Dudelzak, B. ; et al.
LAL-1287, 1976.
Inspire Record 109771 DOI 10.17182/hepdata.38244

None

1 data table
Table 1

No description provided.


Search for rho Like Vector Mesons in the Mass Range 1.2-GeV to 3.0-GeV

Bollini, D. ; Giusti, P. ; Massam, T. ; et al.
Lett.Nuovo Cim. 15 (1976) 393, 1976.
Inspire Record 100567 DOI 10.17182/hepdata.37442

None

1 data table
Table 1

No description provided.


A Study of the Possible Existence of rho-prime and rho-prime-prime

Alles-Borelli, V. ; Bernardini, M. ; Bollini, D. ; et al.
Nuovo Cim.A 30 (1975) 136, 1975.
Inspire Record 100204 DOI 10.17182/hepdata.37699

The possible existence of new vector mesons above the ρ is investigated. The conclusion is that our data are compatible with the existence of the ρ′-meson only if we assume as a firm theoretical prediction the Gounaris-Sakurai tail of the standard ρ-meson. Furthermore our data are compatible with the existence of the ρ″-meson if we assume the validity of the\(\bar p\)p model for the calculation of the multihadron cross-section.

3 data tables
Table 1

THESE MEASUREMENTS OF THE PION FORM FACTOR ARE GIVEN IN D. BOLLINI ET AL., NCL 14, 418 (1975).

Table 2

THESE MEASUREMENTS OF THE FOUR CHARGED PION CROSS SECTION ARE GIVEN IN M. BERNARDINI ET AL., PL 53B, 384 (1974).

Table 3

THESE MEASUREMENTS OF THE TOTAL HADRONIC CROSS SECTION ARE GIVEN IN M. BERNARDINI ET AL., PL 51B, 200 (1974).