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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.

Search for peripheral k+ production in pi- p interactions from 2.75 to 10 gev/c

Bashian, A. ; Finocchiaro, G. ; Good, M.L. ; et al.

Phys.Rev.D 4 (1971) 2680-2683, 1971.

Inspire Record 74755 DOI 10.17182/hepdata.23181

Upper limits are presented for the differential cross section in the reactions π−p→K+Σ− and π−p→K+Y*−(1385) with small momentum transfer from π− to K+.

2 data tables

Table 1

EXTRAPOLATED TO T=0 ASSUMING SLOPE IS 5 GEV**-2.

Table 2

ISOTROPIC ANGULAR DISTRIBUTION ASSUMED IN GIVEN T-RANGE.

Photoproduction of neutral rho mesons

Mcclellan, G. ; Mistry, Nari B. ; Mostek, P. ; et al.

Phys.Rev.D 4 (1971) 2683-2693, 1971.

Inspire Record 74765 DOI 10.17182/hepdata.23152

Results are presented on a series of measurements of ρ-photoproduction from hydrogen, deuterium, and complex nuclei ranging up to lead, at photon energies ranging from 4 to 9 GeV. Detailed dipion mass-spectrum fits are presented, using a Drell-type nonresonant background and its interference with the resonant amplitude, with no other arbitrary backgrounds. For hydrogen and deuterium, the inelastic contributions have been subtracted. The A dependence of the cross sections is analyzed to yield values of γρ24π and σρN at average photon energies of 6.1, 6.5, and 8.8 GeV. The hydrogen-to-deuterium ratios indicate the presence of possible nondiffractive amplitudes at low energies which then decrease with energy.

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Pi- p elastic scattering at 2.29 gev/c

Hagopian, S. ; Hagopian, V. ; Bogart, E. ; et al.

Phys.Rev.D 5 (1972) 2684-2688, 1972.

Inspire Record 74158 DOI 10.17182/hepdata.3597

The reaction π−+p→π−+p has been studied in the 15-in. bubble chamber at the Princeton-Pennsylvania Accelerator. The elastic scattering cross section was determined to be 8.5 ± 0.2 mb. The forward peak fits to an exponential in t with a slope of 8.1 ± 0.2 (GeV/c)−2. The forward differential cross section dσdΩ(0)=17.9±0.7 mb/sr. A fit of the center-of-mass angular distribution to Legendre polynomials needed terms up to the 12th order, corresponding to the highest nonzero partial wave of L=6.

4 data tables

Table 1

No description provided.

Table 2

FORWARD D(SIG)/DOMEGA IS 17.9 +- 0.7 MB/SR. SLOPE IS 8.1 +- 0.2 GEV**-2 (-T = 0.1 TO 0.4 GEV**2).

Table 3

OTHER 2.27 GEV/C DATA ALSO QUOTED.

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Observation of a broad peak in the production of four charged pions by e+ e- collisions around 1.6 gev

Barbarino, G. ; Grilli, M. ; Iarocci, E. ; et al.

Lett.Nuovo Cim. 3 (1972) 689-692, 1972.

Inspire Record 77547 DOI 10.17182/hepdata.37365

None

1 data table

Table 1

STATISTICAL ERRORS ONLY.

Proton compton effect in the region of the delta(1236)-resonance

Genzel, H. ; Jung, M. ; Rausch, K.R. ; et al.

Lett.Nuovo Cim. 4S2 (1972) 695-698, 1972.

Inspire Record 77720 DOI 10.17182/hepdata.37338

None

6 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Channel cross-sections of k- p reactions from 1.26 to 1.84 gev/c

de Bellefon, A. ; Berthon, A. ; Rangan, L.K. ; et al.

Nuovo Cim.A 7 (1972) 567-583, 1972.

Inspire Record 78277 DOI 10.17182/hepdata.37482

We present the results on total channel cross-sections obtained in the Saclay 180 l HBC exposed to a separated K− beam at Nimrod. The cross-sections for each channel are given at 13 incident K− momenta between 1.26 and 1.84 GeV/c.

1 data table

Table 1

No description provided.

Measurement of k- production in the reaction k- p ---> k- p

Blieden, H.R. ; Finocchiaro, G. ; Kirz, J. ; et al.

Phys.Lett.B 39 (1972) 668-670, 1972.

Inspire Record 75745 DOI 10.17182/hepdata.41300

The K ∗− spectrum in the reaction K − +p → K ∗− +p has been measured at beam momenta 10.9, 13.4 and 15.9 GeV/ c using the missing mass technique. Production of the L(1770), and a Q-K ∗ (1420) enhancement are observed. Differential cross sections in the range of momentum transfer 0.12 < | t pp | < 0.40 (GeV/ c ) 2 are given. The L meson is observed with a width Γ = 100 ± 26 MeV. The mass spectrum between the L and 2.5 GeV does not show significant structure.

2 data tables

Table 1

No description provided.

Table 2

No description provided.