Chen, A.
[1.0, 2.0]
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MEASUREMENT OF THE POLARIZATION FOR THE REACTIONS K+ N ---> K+ N AND K0 P AT 1.06-GEV/C, 1.28-GEV/C, 1.39-GEV/C AND 1.49-GEV/C

Nakajima, K. ; Isagawa, S. ; Ishimoto, S. ; et al.
Phys.Lett.B 112 (1982) 75-79, 1982.
Inspire Record 179758 DOI 10.17182/hepdata.30955

The polarization for the K + n elastic and charge-exchange reactions was measured at the momenta of 1.06, 1.28, 1.39 and 1.49 GeV/ c . It was found to be negative for the K + n elastic process and generally positive for the charge-exchange process. The present results are compared with the predictions of phase shift analyses.

8 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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rivet Analysis
Study of $e^+ e^- \to K^0_S K^\pm \pi^\mp$ in the 1.4-{GeV} to 2.18-{GeV} Energy Range: A New Observation of an Isoscalar Vector Meson $\phi^\prime$ (1.65-{GeV})

Mane, F. ; Bisello, D. ; Bizot, J.C. ; et al.
Phys.Lett.B 112 (1982) 178-182, 1982.
Inspire Record 176801 DOI 10.17182/hepdata.30954

First measurements of the e + e − → K S 0 K ± π ∓ reaction in the 1.4–2.18 GeV energy range have been performed with the magnetic detector DM1 at the Orsay storage rings DCI. The cross section is rather large. The production is mainly K ∗0 K 0 which reveals an interference between isovector and isoscalar amplitudes. These results show again the existence of an isoscalar vector at 1.65 GeV shown to be a φ ′ meson.

1 data table
Table 1

No description provided.


rivet Analysis
Study of the $e^+ e^- \to \pi^+ \pi^- K^+ K^-$ Reaction From 1.4-{GeV} to 2.18-{GeV}

Cordier, A. ; Bisello, D. ; Bizot, J.C. ; et al.
Phys.Lett.B 110 (1982) 335-338, 1982.
Inspire Record 169382 DOI 10.17182/hepdata.30957

First measurements of the e + e − → π + π − K + K − cross section have been performed by the DM1 on DCI in the total energy range 1.4–2.18 GeV. π + π − K + K − production is dominated by K ∗ Kπ dynamics. The cross section is rather large around 1.9 GeV. Comparison with K 0 S inclusive production shows an isospin interference. Upper limits on φππ production are compatible with the OZI rule.

2 data tables
Table 1

No description provided.

Table 2

UPPER LIMITS TO PHI CROSS SECTIONS WITH CL=90 PCT.


rivet Analysis
Production of $\pi^0 \pi^0$ and $\pi^0 \eta$ in Photon - Photon Collisions

Edwards, C. ; Partridge, Richard ; Peck, C. ; et al.
Phys.Lett.B 110 (1982) 82-86, 1982.
Inspire Record 168793 DOI 10.17182/hepdata.30959

We investigate the four-photon final state produced in γγ colissions. In the π 0 π 0 channel we observe f(1270) production with predominantly helicity 2 and measure a partial width Γ γγ 2.9 +0.6 −0.4 ± keV (independent of assumptions on the helicity). We observe A 2 (1310) production in the π 0 η channel and find a partial width Γ γγ = 0.77 ± 0.18 ± 0.27 KeV (assuming helicity 2). We give an upper limit for f ≈ ηη .

3 data tables
Table 1

Data read from graph. Systematic error on M is of order of 2% or less.

Table 2

Data read from graph.

Table 3

No description provided.


rivet Analysis
Study of the $e^+ e^- \to \pi^+ \pi^- \pi^+ \pi^-$ Reaction in the 1.4-{GeV} to 2.18-{GeV} Energy Range

Cordier, A. ; Bisello, D. ; Bizot, J.C. ; et al.
Phys.Lett.B 109 (1982) 129-132, 1982.
Inspire Record 168552 DOI 10.17182/hepdata.30995

New measurements of thee + e − → π + π − π + π − cross section have been performed by the magnetic detector DM1 at DCI (ORSAY) in the 1.4−2.18 GeV total energy range with statistics of 11000 events. Assuming the4 π ± production is dominated by the ϱ′(1.6) we determine its parameters: M = 1.57 ± 0.02 (stat.) −0.00 +0.06 (syst.) GeV,Γ = 0.51 ± 0.04 (stat.) −0.01 +0.04 (syst.)GeV,Γ ρ ′ee B ϱ′→ ρ 0 π + π − = 2.67 ± 0.19 (stat.) −0.36 +0.27 (syst.)keV.

1 data table
Table 1

No description provided.


MEASUREMENT OF THE POLARIZED TARGET ASYMMETRY ON gamma p ---> pi+ n IN THE THIRD RESONANCE REGION

Fujii, K. ; Hayashii, H. ; Iwata, S. ; et al.
DPNU-28-81, 1981.
Inspire Record 166957 DOI 10.17182/hepdata.34173

None

4 data tables
Table 1

Axis error includes +- 3/3 contribution.

Table 2

Axis error includes +- 3/3 contribution.

Table 3

Axis error includes +- 3/3 contribution.

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First Measurement of the Photon Structure Function F2

The PLUTO collaboration Berger, Christoph ; Genzel, H. ; Grigull, R. ; et al.
Phys.Lett.B 107 (1981) 168-172, 1981.
Inspire Record 167681 DOI 10.17182/hepdata.31043

Using data taken at PETRA we present results on deep inelastic electron photon scattering at momentum transfers 1 < Q 2 < 15 GeV 2 . The results are expressed in terms of the photon structure function F 2 and are compared with QCD predictions and “hadronic” models of the photon. The pointlike component of the photon is found to be dominant.

2 data tables
Table 1

Data read from graph.. Data for W < 3.5 in Berger et al. 1981, PL 99B,287 (<a href=http://durpdg.dur.ac.uk/scripts/reacsearch.csh/TESTREAC/red+1164> RED = 1164 </a>).

Table 2

PHOTON STRUCTURE FUNCTION. NUMERICAL VALUES OF DATA ON FIGURE SUPPLIED BY W. WAGNER.


rivet Analysis
Study of the Reaction $e^+ e^- \to 3 \pi^+ 3 \pi^-$ in the Total Energy Range 1400-{MeV} to 2180-{MeV}

Bisello, D. ; Bizot, J.C. ; Buon, J. ; et al.
Phys.Lett.B 107 (1981) 145-147, 1981.
Inspire Record 166353 DOI 10.17182/hepdata.31033

The e + e − → 3 π + 3 π − cross section has been measured between 1400 and 2180 MeV with the magnetic detector DM1 at the Orsay storage rings DCI. The cross section increases continuously above 1600 MeV and reaches 2 nb at the maximum explored energy, much larger than VDM previous estimates.

1 data table
Table 1

No description provided.


The Cross-section Ratio $\sigma(\nu n)/\sigma(\nu p)$ for Charged Current and Neutral Current Interactions Below 10-{GeV}

Jacques, P.F. ; Kalelkar, M. ; Miller, P.A. ; et al.
Phys.Rev.D 24 (1981) 1067-1070, 1981.
Inspire Record 165487 DOI 10.17182/hepdata.24072

We have measured the cross-section ratio σ(νn)σ(νp) for both charged-current and neutral-current interactions at low energy. The experiment used the wide-band neutrino beam at Brookhaven National Laboratory. The detector was the 7-foot bubble chamber filled with a 62% neon-hydrogen mixture. For charged-current events we find that the ratio reaches an asymptotic value of 1.80±0.19 for neutrino energies above 1 GeV. For neutral-current events we measure the ratio to be 1.07±0.24. Both of these results are in agreement with the quark model.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A Measurement of the Cross-Section for Four Pion Production in gamma gamma Collisions at SPEAR

Burke, D.L. ; Abrams, G.S. ; Alam, M.S. ; et al.
Phys.Lett.B 103 (1981) 153-156, 1981.
Inspire Record 165016 DOI 10.17182/hepdata.31168

We present a measurement of the cross section for the reaction e + e − → e + e − π + π − π + π − at SPEAR. This channel is found to be large and dominated by the process γγ → ϱ 0 ϱ 0 → π + π − π + π − . The cross section, which is small just above the four-pion threshold, exhibits a large enhancement near the ϱ 0 ϱ 0 threshold.

1 data table
Table 1

Axis error includes +- 0.0/0.0 contribution (THE QUOTED ERRORS INCLUDE VARIOUS SYSTEMATIC ERRORS ADDED QUADRATICALLY).