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Two-body strange-particle final states in pi- p interactions at 4.5 and 6 gev/c

Crennell, D.J. ; Gordon, H.A. ; Lai, Kwan-Wu ; et al.
Phys.Rev.D 6 (1972) 1220-1254, 1972.
Inspire Record 73936 DOI 10.17182/hepdata.3601

Results on the following π−p reactions involving a hyperon are studied at 4.5 and 6.0 GeV/c from a high-statistics bubble-chamber experiment. (1) π−p→(Λ, Σ0)K0: Differential cross sections and hyperon polarizations are presented. Comparison with the line-reversed reactions K¯N→(Λ, Σ0)π indicates the failure of the predictions of K*(890) and K*(1420) exchange degeneracy. Effective trajectories for these two reactions are compared. Shrinkage is observed in K¯N→Λπ and not in π−p→ΛK0. (2) π−p→(Λ, Σ0)K*(890)0: Differential cross sections, hyperon polarizations, and K*(890)0 density-matrix elements are determined. ΛK*(890)0 decay correlations are found to impose strong constraints on the scattering amplitudes. The data indicate that both natural- and unnatural-parity exchanges contribute large, but opposite, Λ polarizations. This behavior cannot be explained by a simple exchange model utilizing K and the exchange-degenerate K*(890) and K*(1420) only. Additional trajectories or absorption effects are required to obtain the observed Λ-polarization effects. Comparison of ΛK*(890)0 and Σ0K*(890)0 indicates the greater importance of unnatural-parity exchange in the former reaction. We observe no evidence for deviations from isospin predictions in ΛK*(890)0 production where K*(890)0→K+π− and KS0π0. (3) π−p→ΛK*(1420)0 and ΛK*(1300)0: K*(1420)0 density-matrix elements satisfying positivity constraints are determined allowing for s-wave interference effects. Evidence of the existence of a narrow K*(1300)0→Kππ with a dominant K+ρ− decay mode is observed in the 4.5- and 6-GeV/c data. (4) Σ(1385), Λ(1405), Λ(1520) production: Differential cross sections for the quasi-two-body reactions π−p→Y0K0, where Y0 is Λ(1405), Λ(1520), or Σ(1385)0, are presented and found to have a very similar flat slope in the forward direction. Data for forward K+ scattering in the reaction π−p→Σ(1385)−K+ are presented and discussed. It is argued that this forward peak cannot be explained by kinematic reflection or an s-channel effect and therefore must be due to either two-particle exchange or a single exotic exchange in the t channel.

39 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

FIT FOR FORWARD CROSS SECTION AND SLOPE.

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The Reaction $p + p \rightarrow p + p + {\pi}^0$ in the Energy Range from Threshold to 665 MeV

Dunaitsev, A.F. ; Prokoshkin, Yu.D. ;
Sov.Phys.JETP 9 (1959) 1179, 1959.
Inspire Record 1408597 DOI 10.17182/hepdata.70460

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


The momentum dependence of the differential pion charge exchange cross section from 1.3 to 3.8 GeV/c

Kistiakowsky, V. ; Bastian, P. ; Brabson, B. ; et al.
Conference Paper, 1976.
Inspire Record 1408079 DOI 10.17182/hepdata.70407

None

18 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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QUADRUPOLE EFFECT IN ELASTIC PROTON SCATTERING WITH 1-GEV ENERGY ON THE NUCLEI OF THE P SHELL. (IN RUSSIAN)

Alkhazov, G.D. ; Belostotsky, S.L. ; Vorobev, A.A ; et al.
Pisma Zh.Eksp.Teor.Fiz. 29 (1979) 88-92, 1979.
Inspire Record 145178 DOI 10.17182/hepdata.70237

None

26 data tables
Table 1

X ERROR D(THETA) = 0.2000 DEG.

Table 2

X ERROR D(TARGET) = 99.60 PCT. X ERROR D(THETA) = 0.2000 DEG.

Table 3

X ERROR D(THETA) = 0.2000 DEG.

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An Investigation of the $\pi + p \longrightarrow n + {\pi}^0$ Charge Exchange Scattering and the ${\pi}^{-} + p \longrightarrow n + {\eta}({\eta} {\longrightarrow} 2\gamma)$ Reaction in the 1.55-4.5 BeV/c Region

Barmin, V.V. ; Dolgolenko, A.G. ; Krestnikov, Yu.S. ; et al.
Sov.Phys.JETP 19 (1964) 102-106, 1964.
Inspire Record 1407540 DOI 10.17182/hepdata.70207

The rr- + p- n + rr0 charge-exchange scattering and the rr- + p- n + 1J ( 1J- 2y) reaction were investigated in 1.55-4.5 BeVIc region in a 17-liter propane-xenon bubble chamber. The total cross sections of both reactions were measured in this region. The angular distributions of the rr0 mesons in the charge-exchange reaction were obtained. The backward exchange-scattering cross sections du( rr- + p- n + rr 0 )ldQ were estimated.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Investigation of $\pi^- + p \rightarrow \pi^0 + n$ exchange scattering at 2.8. BeV/c

Barmin, V.V. ; Dolgolenko, A.G. ; Meshkovskii, A.G. ; et al.
Sov.J.Nucl.Phys. 4 (1967) 592-595, 1967.
Inspire Record 1407282 DOI 10.17182/hepdata.69980

None

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Summary data on elastic $pp$ and $pd$ scattering at small angles and the real part of the $pn$-scattering amplitude in the energy interval 1-10 BeV

Dalkhazhav, N. ; Devinski, P.A. ; Zayachki, V.I. ; et al.
Sov.J.Nucl.Phys. 8 (1969) 196-202, 1969.
Inspire Record 1392874 DOI 10.17182/hepdata.69719

None

32 data tables
Table 1

RE/IM MEASUREMENTS TAKEN FROM TABLE 1 OF KIRILLOVA 65.

Table 2

TABLE 1 (REF. 1 ).

Table 3

RE/IM MEASUREMENTS TAKEN FROM TABLE 1 OF KIRILLOVA 65.

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The Photoproduction of Neutral Pions from Protons Between 0.7-GeV and 1.7-GeV

Barton, J.S. ; Booth, P.S.L. ; Carroll, L.J. ; et al.
Nucl.Phys.B 84 (1975) 449-466, 1975.
Inspire Record 90496 DOI 10.17182/hepdata.32128

Measurements of differential cross sections for pi-zero photoproduction from protons have been made at angles between 60° and 140° c.m. in the photon energy range 0.7 GeV to 1.7 GeV. The data are compared with the rits provided by three recent partial-wave analyses of pion photoproduction and some significant discrepancies observed.

9 data tables
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Forward $\pi^-p$ charge exchange scattering between 0.8 and 1.9 GeV

Borgeaud, P. ; Bruneton, C. ; Ducros, Y. ; et al.
Phys.Lett. 10 (1964) 134-137, 1964.
Inspire Record 1400914 DOI 10.17182/hepdata.31224

None

15 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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The angular distribution of backward elastically scattered pions at 3.55 GeV/c

Baker, W.F. ; Carlson, P.J. ; Chabaud, V. ; et al.
Phys.Lett. 23 (1966) 605-609, 1966.
Inspire Record 1389621 DOI 10.17182/hepdata.29776

The elastic scattering of 3.55 GeV/ c π + and π − mesons by protons was measured at centre-of-mass angles between 165° and 177°. The angular distributions for 864 events show a steeply rising backward peak for π + p, while the shape is less clear for π − p.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

Extrapolations.