Korolev, G.A
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Photoproduction of single pi+- mesons on nuclei at e(gamma)=2 and 3 gev. parameters of proton-neutron distribution in nuclei

Abramyan, S.R. ; Aganyants, Aleksandr O. ; Adamyan, F.V. ; et al.
Yad.Fiz. 16 (1972) 739-747, 1972.
Inspire Record 85228 DOI 10.17182/hepdata.18402

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


A formation study of n anti-n interactions between 1.09 and 3.45 gev/c. (iv)-features of annihilations into k anti-k and pi mesons

Oh, B.Y. ; Eastman, P.S. ; Ming, Ma.Z. ; et al.
Nucl.Phys.B 63 (1973) 1-27, 1973.
Inspire Record 83880 DOI 10.17182/hepdata.32487

Final state resonance production and single particle momentum spectra are presented for p p annihilations into K K and π's between 1.09 and 3.45 GeV/ c . Resonance production generally agrees with the Lamb statistical model. Momentum spectra of K's and π's are independent of incident energy, while the mean multiplicity increases in proportion to the c.m. energy, supporting the annihilation model of Jacob and Nussinov.

2 data tables
Table 1

THESE CROSS SECTIONS WERE GIVEN IN DETAIL IN B. Y. OH ET AL., NP B51, 57 (1973).

Table 2

No description provided.


A formation study of n anti-n interactions between 1.51 and 2.90 gev/c. i. topological and reaction cross-sections

Eastman, P.S. ; Ming, Ma.Z. ; Oh, B.Y. ; et al.
Nucl.Phys.B 51 (1973) 29-56, 1973.
Inspire Record 84299 DOI 10.17182/hepdata.32706

A systematic study of p p and p d topological and reaction cross sections between 1.51 and 2.90 GeV/ c has been completed. The data have been analysed in relation to the three known structures at c.m. N N energies of 2190, 2350 and 2375 MeV. The data suggest that four- and six-pion annihilations of antiprotons on neutrons may be the source of the 2350 MeV effect. Further data below 1.60 GeV/ c are required to verify this tentative conclusion.

3 data tables
Table 1

No description provided.

Table 2

INCLUDING 3 PCT SYSTEMATIC ERROR.

Table 3

No description provided.


A formation study of n anti-n interactions between 1.51 and 2.90 gev/c. iii. resonance production

Ming, Ma.Z. ; Eastman, P.S. ; Oh, B.Y. ; et al.
Nucl.Phys.B 51 (1973) 77-94, 1973.
Inspire Record 84298 DOI 10.17182/hepdata.32684

A systematic study of p p and p d resonance production cross sections in non-strange annihilation channels between 1.51 and 2.90 GeV/ c has been completed. The data have been analysed in relation to the three known structures at c.m. N N energies of 2190, 2350 and 2375 MeV. Several resonance intermediate states may have broad maxima near the isopin one 2350 MeV structure. However, more data below 1.6 GeV/ c are required to better describe the background in this region before firm conclusions may be drawn.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


MEASUREMENT OF THE ASYMMETRY PARAMETER IN THE PHOTOPRODUCTION OF phi MESONS

Halpern, H.J. ; Prepost, R. ; Tompkins, D.H. ; et al.
Phys.Rev.Lett. 29 (1972) 1425-1427, 1972.
Inspire Record 73540 DOI 10.17182/hepdata.21442

We have measured the asymmetry parameter Σ=(σ∥−σ⊥)(σ∥+σ⊥) for the photoproduction of ϕ mesons with photons polarized parallel and perpendicular to the plane of decay for the reaction γp→ϕp→K+K−p. We find Σ=0.985±0.12 at a photon energy of 8.14 GeV and |t| of 0.2 (GeVc)2, consistent with pure diffraction production, or pure naturalparity Regge exchange.

1 data table
Table 1

No description provided.


Measurements of the symmetries in the differential cross sections for anti-p p ---> anti-p p and anti-p p ---> pi- pi+ using polarized protons

Ehrlich, R.D. ; Etkin, A. ; Glodis, P. ; et al.
Phys.Rev.Lett. 28 (1972) 1147-1150, 1972.
Inspire Record 75507 DOI 10.17182/hepdata.21461

We report measured asymmetries as a function of polar scattering angle for the reactions p¯p→π−π+ and p¯p→p¯p, using a polarized proton target. The annihilation data, obtained at a p¯ momentum of 1.64 GeV/c, are the first asymmetry data to be collected for this channel. A fit of these data and published differential cross section data is made by a partial-wave expansion, and the results are compared with a previous analysis. The elastic scattering data, obtained at 1.64 and 2.55 GeV/c, are fitted with an eight-parameter strong-absorption model.

1 data table
Table 1

No description provided.


Anti-proton-deuteron elastic scattering between 1.60 and 2.00 gev/c

Ming, Ma.Z. ; Smith, G.A. ;
Phys.Rev.Lett. 27 (1971) 344-347, 1971.
Inspire Record 68950 DOI 10.17182/hepdata.3515

We have studied antiproton-deuteron elastic scattering between 1.60 and 2.00 GeV/c incident momenta. The differential cross sections may be characterized by a very steep forward peak (with b∼43 GeV−2) and a prominent break near −t∼0.2 GeV2. The results are used to test the validity of Glauber's multiple-scattering theory. Within the experimental range of measurements (−t between 0.028 and 0.46 GeV2), the theory provides a good qualitative description of the data.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Charge exchange and production of eta mesons and multiple neutral pions in pi- p reactions between 654 and 1247 mev/c

Bulos, F. ; Lanou, R.E. ; Piper, A.E. ; et al.
Phys.Rev. 187 (1969) 1827-1844, 1969.
Inspire Record 62084 DOI 10.17182/hepdata.5293

An experiment designed to study the π−p total neutral cross section and its breakdown into several channels has been performed at eleven incident pion momenta ranging from 654 to 1247 MeV/c. Angular distributions for the charge exchange π0 and for η0 production are given in terms of Legendre-polynomial expansion coefficients. Forward and backward differential cross sections are presented for the charge-exchange channel and comparisons with recent dispersion-relation predictions for the forward cross section are made.

34 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Polarization of the Recoil Proton from pi0 Photoproduction in Hydrogen

Maloy, J.O. ; Peterson, V.Z. ; Salandin, G.A. ; et al.
Phys.Rev. 139 (1965) B733-B746, 1965.
Inspire Record 944960 DOI 10.17182/hepdata.26657

The polarization of the recoil proton in neutral single-pion photoproduction from hydrogen, γ+p→p+π0, has been measured for pion center-of-mass angles near 90° at 7 photon energies from 450 to 900 MeV. The polarization rises to a maximum of 0.58 near 600 MeV and is still 0.42 at 900 MeV. The sign of the polarization is negative in the sense of k×q, where k is the photon momentum and q is the pion momentum. The measured values are given as functions of laboratory photon energy and c.m. pion angle as follows: 450 MeV, 109°, -0.16±0.14; 525 MeV, 84°, -0.36±0.19; 585 MeV, 86°, -0.58±0.15; 660 MeV, 77°, -0.51±0.17; 755 MeV, 76°, -0.55±0.15; 810 MeV, 89°, -0.45±0.17; 895 MeV, 90°, -0.42±0.16. The recoil protons were momentum-analyzed with a magnetic spectrometer. Nuclear emulsion was used as scatterer and detector. The emulsion technique is discussed in detail. The number of individual scatterings in emulsion used for each measurement varied between 750 and 1000.

1 data table
Table 1

No description provided.


Elastic and quasielastic scattering of 660-MeV protons by deuterons

Leksin, G.A. ;
Sov.Phys.JETP 5 (1957) 371-377, 1957.
Inspire Record 42734 DOI 10.17182/hepdata.21928

None

1 data table