HEPData

The apparatus and the experimental method used for the measurements of the single-π+ photoproduction by linearly polarized γ rays are described. The present results on the asymmetry ratioA (θ) are summaized. The range covered by our results is θ=(30÷145)o (c.m.) andE γ=(200÷450) MeV.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

$\pi^{-} + p$ elastic scattering in the neighbourhood of $N^{*}_1/2$ (2190)

Busza, W. ; Davis, D.G. ; Duff, B.G. ; et al.

Nuovo Cim. 52A (1967) 331-341, 1967.

Inspire Record 1185326 DOI 10.17182/hepdata.37568

Elastic π−+p differential cross-section data are presented at the incident-pion momenta 1.72, 1.89, 2.07, 2.27 and 2.46 GeV/c. Resonant behaviour in the coefficients of a Legendre polynomial expansion indicates G- or H-wave resonance. Further analysis using an energy-dependent parametrization of G- and H-waves shows the results to be compatible with the 7−/2 assignment for the , but equally acceptable solutions are obtained with the inclusion of an additional 9+/2 resonance contribution.

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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$\Lambda^{0}$-polarization from the reaction $\gamma+p = \Lambda^{0}+K^{+}$ in the energy range (950÷1050)MeV

Grilli, M. ; Mezzetti, L. ; Nigro, M. ; et al.

Nuovo Cim. 38 (1965) 1467-1488, 1965.

Inspire Record 1185245 DOI 10.17182/hepdata.37616

We report some measurements of the Λ polarization in the reaction Υ+P=K+Λ+0, for 950<Eγ<1050 MeV. In Sects. 1 and 2 the experimental apparatus and the detection techniques used are described. In Sect.3 we discuss our results and those of other groups and compare them with the theoretical predictions.

1 data table

Table 1

Axis error includes +- 0.0/0.0 contribution (?////).

$\Lambda^{0}$ polarization from the reaction $\gamma + p=K^{+} + \Lambda^{0}$ in the energy range (950÷1050) MeV

Borgia, B. ; Grilli, M. ; Joos, P. ; et al.

Nuovo Cim. 32 (1964) 218-223, 1964.

Inspire Record 1185014 DOI 10.17182/hepdata.37674

1 data table

Table 1

Axis error includes +- 0.0/0.0 contribution (?////).

K+ P ELASTIC SCATTERING AT 3.5-GeV/c AND 5.0-GeV/c

De Baere, W. ; Debaisieux, J. ; Dufour, J.P. ; et al.

Nuovo Cim. A45 (1966) 885, 1966.

Inspire Record 50048 DOI 10.17182/hepdata.37572

The elastic scattering of K+ mesons on protons is studied at 3.5 and 5 GeV/c. The total elastic cross-sections are found to be (4.36±0.36) mb and (3.82±0.41) mb respectively. The differential elastic cross-sections, which exhibit characteristic diffraction peaks, are fitted by dσ/dt=(dσ/dt)0eαt, giving α=(3.85±0.12) and (4.70±0.21) (GeV/c)−2 for the two momenta respectively, with |t|⪝0.65 (GeV/c)2. The results are compared to those at neighbouring energies, giving some support to the presence of a real part of the forward scattering amplitude. The diffraction peak shows definite shrinking with increasing momenta. The data are examined in the light of models for high-energy scattering.

1 data table

Table 1

No description provided.

K+p elastic scattering at 3.0 GeV/c

Debaisieux, J. ; Grard, F. ; Heughebaert, J. ; et al.

Nuovo Cim. 43A (1966) 142-153, 1966.

Inspire Record 1185324 DOI 10.17182/hepdata.37574

In the course of a systematic study of K+p interactions at 3.0 GeV/c, the elastic-scattering reaction has been investigated. A total of 1720 events were identified as elastic scatters, giving a cross-section of (4.8±0.4) mb. The angular distribution shows characteristic diffraction peaking and was fitted using dσ/d|t|=(dσ/d|t|)0 exp [αt+βt 2], in the momentum-transfer region (0.05÷1.14) (GeV/c)2. The best fit gaveα=(4.55±0.39) (GeV/c)−2 andβ=(0.64±0.42)(GeV/c)−4. The extrapolated experimental cross-section at 0°, (dσ/dt)0, is found to be (19.5±2.3) mb/(GeV/c)2, and exceeds the optical-theorem prediction by (3.8±2.3) mb/(GeV/c)2, implying that there is a contribution from the real part of the K+p scattering amplitude at 3.0 GeV/c.

1 data table

Table 1

No description provided.

Single-$\pi^{0}$ photoproduction from hydrogen around the «Second resonance»

Bellettini, G. ; Bemporad, C. ; Biggs, P.J. ; et al.

2016.

Inspire Record 1185321 DOI 10.17182/hepdata.37693

New results are presented on the differential cross-section for the reaction α+p→π0+p, at energies between 600 and 1000 MeV, and c.m. pion angles Θ*π=40° and Θ*π=60°. The present data, together with that at Θ*π=40° already published (11), show an angle-independent position of the second resonance at about 750 MeV. Rather flat angular distributions in the forward c.m. hemisphere are also favoured by these data. On comparing the cross-sections obtained when detecting both the neutral pion and the recoil proton, and when detecting only the latter, estimates of the background of «ghost protons» are obtained, in agreement with the empirical curve proposed in ref. (11).

1 data table

Table 1

No description provided.

$\pi^{-}p$ interactions at 720 MeV

Van de Walle, R.T. ; Pols, C.L.A. ; Schotanus, D.J. ; et al.

Nuovo Cim. 53A (1968) 745-761, 1968.

Inspire Record 1185327 DOI 10.17182/hepdata.37519

The interactions of 720 MeV negative pions with protons were investigated using pictures from the 35 cm Saclay hydrogen bubble chamber. Partial cross-sections were determined with the following results: σ(elastic)=13.2±0.5) mb, σ(π−pπ0)=(5.25±0.30) mb, σ(π−π+n)=()7.17±0.35) mb σ (neutrals)=(9.9±0.7) mb, σ (2π production)=(1.03±0.13) mb. The elastic-scattering angular distribution was fitted with a fifth-order polynomial in cos θ* π which shows the effect of a significantF 5/2-D 5/2 interference contribution and predicts a value for (dσ/dΩ) (0°) in agreement with dispersion theory. For both single-π production channels, the two-body effective mass plots and c.m. angular distributions are presented, discussed and compared with the predictions from phase-space, the Olsson-Yodh isobar model and the pole model of isobar production. TheN *(3/2, 3/2) isobar is seen to play an important role in the ππN final states, but the agreement of the data with the existing isobar models and their assumptions is not satisfactory. A comparison of the different two-pion production cross-sections π−pπ−π+, π−pπ0π0 and π−π+nπ0 suggests a strong contribution of π−p→η0n to the π−π+nπ0 final state. An upper limit for σ(π−p→η0n) of (3.0±0.4) mb was obtained.

1 data table

Table 1

No description provided.

Small-angle photoproduction of single positive pions on hydrogen at energies around the « second resonance »

Beneventano, M. ; Finzi, R. ; Mezzetti, L. ; et al.

Nuovo Cim. 28 (1963) 1464-1483, 1963.

Inspire Record 1185011 DOI 10.17182/hepdata.37694

Cross-sections of single positive pions produced in hydrogen by photons of laboratory energies between 550 and 900 MeV at centre of-mass angle between 0° and 10° have been measured, using a magnetic spectrometer and an appropriate counter arrangement. The experiment is described in detail. Angular distributions at constant y-ray energy and the dependence of the differential cross-section on energy at variousconstant centre-of-mass angles are given and their significance discussed.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Single pion production and multiple pion annihilations in p−p interactions at 7 GeV/c

Ferbel, T. ; Firestone, A. ; Johnson, J. ; et al.

Nuovo Cim. 38 (1965) 12-18, 1965.

Inspire Record 1185177 DOI 10.17182/hepdata.37641

A preliminary study of single pion production with no annihilation and multiple pion annihilation in antiproton-proton interactions at 7 GeV/c indicates that the single pion production cross-section is 5.6±1.2mb, and the multipion annihilation cross-section is ∼24mb. Although there is strong evidence for resonance production in the one pion production channels, these states do not appear to be dominated by any single resonance. Resonance production in the annihilation channels is small compared to rates observed at lower energies.

1 data table

Table 1

No description provided.

Antiproton-proton total cross-sections between 0.575 and 5.35 GeV/c

Amaldi, U. ; Fazzini, T. ; Legros, M. ; et al.

Nuovo Cim. 34 (1964) 825-853, 1964.

Inspire Record 1185176 DOI 10.17182/hepdata.37642

Total p−p cross-section measurements have been made at 28 momenta, in the range (0.575÷5.35) GeV/c. The cross-section decreases monotonically with increasing momentum. No important irregularity has been found.

1 data table

Table 1

No description provided.

Date

Collaboration

Subject_areas

Phrases

Reactions

Observables

CM Energies (GeV)

Authors

Inclusive anti-K* (890) Production in pi- p Interactions at 16-GeV/c

Transverse Momentum of Hadrons Produced in Neutrino and Anti-neutrino Interactions on an Isoscalar Target in BEBC

Large Transverse Momentum Particle Production in $\alpha \alpha$ and $p p$ Collisions at the {CERN} {ISR}

Inclusive Production of $\rho^0$ in Neutrino $p$ Charged Current Interactions

Study of Longitudinal Distributions in the Fragmentation Regions, Using the Quark - Parton Model in $K^- p$ Interactions at 70-{GeV}/$c$

Inclusive Production of $\gamma$, Neutral $K$, $\Lambda^0$ and $\bar{\Lambda}^0$ in $K^- p$ Interactions at 110-{GeV}/$c$

Inclusive Neutral Kaon Production in 70-{GeV}/$c K^+ P$ Interactions

Inclusive Neutral Strange Particle Production in Neutrino $p$ Interactions

Inclusive Production of Muon Pairs and Vector Mesons in $\pi^- N$ Collisions at Momenta 27-{GeV}/$c$ and 40-{GeV}/$c$

An Investigation of Quark and Diquark Fragmentation in Neutrino $p$ and Anti-neutrino $p$ Charged Current Interactions in {BEBC}

Inclusive Production of Lambdas and Anti-lambdas in $\gamma p$ Interactions for Photon Energies Between 25-{GeV} and 70-{GeV}

A Study of Deep Inelastic Hadron - Hadron Collisions with a Large Acceptance Calorimeter Trigger

Inclusive V0 Production in anti-p p Interactions at 12-GeV/c

A Triple Regge Analysis of the Inclusive Reaction p p --> Lambda x++ at 19-GeV/c

Positive-pion photoproduction by linearly polarized $\gamma$ rays. I: experimental method and results

$\pi^{-} + p$ elastic scattering in the neighbourhood of $N^{*}_1/2$ (2190)

$\Lambda^{0}$-polarization from the reaction $\gamma+p = \Lambda^{0}+K^{+}$ in the energy range (950÷1050)MeV

$\Lambda^{0}$ polarization from the reaction $\gamma + p=K^{+} + \Lambda^{0}$ in the energy range (950÷1050) MeV

K+ P ELASTIC SCATTERING AT 3.5-GeV/c AND 5.0-GeV/c

K+p elastic scattering at 3.0 GeV/c

Single-$\pi^{0}$ photoproduction from hydrogen around the «Second resonance»

$\pi^{-}p$ interactions at 720 MeV

Small-angle photoproduction of single positive pions on hydrogen at energies around the « second resonance »

Single pion production and multiple pion annihilations in p−p interactions at 7 GeV/c

Antiproton-proton total cross-sections between 0.575 and 5.35 GeV/c