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Spin Parity Analysis of the rho (1.71) Resonance Produced in 9.1-GeV/c pi- p Interactions

Armenise, N. ; Fogli Muciaccia, M.T. ; Silvestri, A. ; et al.

Lett.Nuovo Cim. 14 (1975) 177-183, 1975.

Inspire Record 103792 DOI 10.17182/hepdata.37443

None

1 data table

Table 1

FOUR PION RESONANCE CALLED RHO(1.71) BY AUTHORS. DECAY IS CONSISTENT WITH 100 PCT <RHO0 RHO-> MODE.

Pi0 photoproduction from neutrons

Osborne, A.M. ; Brownam, A. ; Hanson, K. ; et al.

Phys.Rev.Lett. 29 (1972) 1621-1624, 1972.

Inspire Record 84571 DOI 10.17182/hepdata.21431

We have measured the ratio of the cross section for γ+n→π0+n to the cross section for γ+p→π0+p at 4.7 and 8.2 GeV. The measurements were made by detecting the recoil nucleons in coincidence with the decay γ rays of the π0's produced from a deuterium target. At 4.7 GeV the cross-section ratio, R≡σ(γ+n→π0+n)σ(γ+p→π0+p), is less than 1.0 at low t, with an indication of a dip at about t=−0.7(GeVc)2, and rises to 1.0 at high t. The ratios at the higher energy have less structure and are uniformly closer to 1.0.

2 data tables

Table 1

No description provided.

Table 2

No description provided.

Analysis of the reaction pi- p ---> p omega pi- at 9.1 gev/c

Armenise, N. ; Fogli Muciaccia, M.T. ; Silvestri, A. ; et al.

Nuovo Cim.A 17 (1973) 707-720, 1973.

Inspire Record 87699 DOI 10.17182/hepdata.37770

The reaction π-p→pωπ- has been studied at 9.1 GeV/c, its total cross-section is σ=(123±22) μb. The pB− and the quasi-three-body channels contribute with cross-section of σ=(24±7) μb and σ=(94±23) μb, respectively. The main features of the quasi-three-body pωπ- channel, displayed by some techniques of data presentation, are satisfactorily described by a double-Regge-pole model. In this model pomeron-meson and meson-meson exchanges are taken into account. An OPE modelà la Veneziano predicts a total cross-section too high and reproduces very poorly the observed features.

1 data table

Table 1

BREIT-WIGNER PLUS BACKGROUND FITS FOR B(1235)- AND OMEGA MESONS.

Proton proton elastic scattering and nucleon resonance production at high-energies

Allaby, J.V. ; Diddens, A.N. ; Dobinson, R.W. ; et al.

Nucl.Phys.B 52 (1973) 316-382, 1973.

Inspire Record 73454 DOI 10.17182/hepdata.32650

Angular distributions of proton-proton elastic scattering have been measured for incident beam momenta of 10.0, 12.0, 14.2 and 24.0 GeV/ c over a range of lab scattering angles from 12 to 152 mrad. This is equivalent to a range of four-momentum transfer squared from about 0.1 to 6.7 GeV 2 at the highest momentum. Nucleon resonance production in the two-body reaction p + p → p + X has been studied at 24.0 GeV/ c incident momentum from 13.5 to 112 mrad by measuring the proton momentum spectra from the elastic peak down to a momentum corresponding to a missing mass of about 2.6 GeV. The new data are compared with previous results and theoretical models.

10 data tables

Table 1

ESTIMATED 8 PCT RANDOM ERROR.

Table 2

ESTIMATED 8 PCT RANDOM ERROR.

Table 3

ESTIMATED 8 PCT RANDOM ERROR.