McNeil, R.R.
Integrated Cross Section
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A study of the reactions k- n ---> pi- pi- pi+ lambda0, k- n ---> pi- pi- pi+ sigma0, and k- n ---> pi- pi- pi+ lambda0 pi0 at 4.91 gev/c

Berg, R.E. ; Price, R.R. ; Waters, J.W. ; et al.
Nucl.Phys.B 39 (1972) 509-524, 1972.
Inspire Record 75242 DOI 10.17182/hepdata.32956

We have measured the cross sections for these reactions and the cross sections of resonances produced in them. The production of Y ∗± (1385) , ϱ o (765), and f o (1260) is observed in the first reaction; ϱ o (765) in the second; Y ∗−,o (1385), ω o (748), B − (1235), probably ϱ o,− (765), and an enhancement we interpret to be the J P = 1 2 − Σ o (1750) in the third. Single particle longitudinal momentum distributions and average values of transverse momentum are presented. The observed single particle production angular distributions show good qualitative but not quantitative agreement with the Reggeized multiperipheral model of Chan, Loskiewicz, and Allison. We found strong disagreement between the amounts of observed resonance production and the results of the multiperipheral model of Plahte and Roberts that is based on the models of Chan et al. and Veneziano. However, we included isospin effects only in an approximate manner.

1 data table
Table 1

No description provided.


A study of the reactions k- n ---> pi- pi- p anti-k0, k- n ---> pi- pi- p anti-k0 pi0, and k- n ---> pi- pi- pi+ anti-k0 n at 4.91 gev/c

Price, R.R. ; Berg, R.E. ; Waters, J.W. ; et al.
Nucl.Phys.B 39 (1972) 572-586, 1972.
Inspire Record 75241 DOI 10.17182/hepdata.32957

Resonance production in the above reactions containing a proton in the final state is characterized primarily by the production of K ∗− (890). The events with a final state neutron are characterized by the production of either K ∗− (890) or Δ − (1236), but very little double resonance production. Cross sections are presented. Exponential slopes for the momentum-transfer distributions of the K ∗− (890) and Δ − (1236) were determined and found to be much smaller than for elastic scattering. For the π − π − p K 0 events the spin density matrix elements for the decay of the K ∗− (890) in the Jackson frame imply alignment. Single particle longitudinal momentum distributions and average values of transverse momentum are presented. The single particle production angular distributions of all three reactions were compared with the results of the Reggeized multiperipheral model of Chan, Loskiewicz, and Allison (CLA) modified to include resonance production. Good qualitative agreement was found. The data from the π − π − p K 0 events were also compared with a multiperipheral model of Plahte and Roberts that is based on the CLA and Veneziano models.

1 data table
Table 1

No description provided.


Proton-antiproton annihilation into pi+ pi- and k+ k- from 700 to 1100 mev/c

Mandelkern, M.A. ; Burns, R.R. ; Condon, P.E. ; et al.
Phys.Rev.D 4 (1971) 2658-2666, 1971.
Inspire Record 74756 DOI 10.17182/hepdata.23118

Total and differential cross sections are presented for proton-antiproton annihilation into π+π− and K+K− at six laboratory momenta between 686 and 1098 MeV/c. The two-pion final state displays moderate energy dependence in its differential cross section, but shows no evidence of any direct-channel resonances. In contrast, the two-kaon final state exhibits some behavior in the total and differential cross section suggestive of a possible direct-channel effect between 800 and 1000 MeV/c.

3 data tables
Table 1

NOTE CUT EXCLUDES LARGE FORWARD CROSS SECTION.

Table 2

LEGENDRE COEFFICIENTS NORMALIZED TO LEGN(L=0) = 0.5.

Table 3

LEGENDRE COEFFICIENTS NORMALIZED TO LEGN(L=0) = 0.5.


Four-pion final state in anti-p p annihilations at 940 mev/c

Burns, R.R. ; Condon, P.E. ; Donahue, J. ; et al.
Nucl.Phys.B 27 (1971) 109-124, 1971.
Inspire Record 68769 DOI 10.17182/hepdata.33655

Resilts are reported on the four-pion final state from antiproton annihilations in hydrogen in the vicinity of 940 MeV/ c . The cross section for π − π − π + π + is found to be 3.6 mb. Abundant resonance production is observed, with fits indicating that quasi-two-body production constitutes approximately half the four-pion events. The model employed, which includes resonance production and Bose symmetrization, yields excellent fits to mass distributions and angular correlations.

2 data tables
Table 1

ASSUMING TOTAL AP P CROSS SECTION OF 122 MB. ERRORS INCLUDE SYSTEMATIC UNCERTAINTIES.

Table 2

ANALYSIS OF 4PION FINAL STATE. FIXED MASS AND WIDTH BREIT-WIGNER RESONANCES AND BACKGROUND FITTED TO DATA. CROSS SECTIONS CALCULATED BY PDG (COMPILATION PDG3). ERROR GIVEN IS SCATTER FROM VARIOUS FITS.


Scattering of antineutrons by protons

Franklin, A.D. ; Socash, R.R. ;
Phys.Rev. 184 (1969) 1413-1414, 1969.
Inspire Record 62285 DOI 10.17182/hepdata.5406

The total and elastic cross sections for antineutrons on protons have been measured for antineutron momenta from 0.5 to 2.5 GeV/c. The results are in agreement with previous p¯p data at these momenta.

2 data tables
Table 1

'1'. '2'. '3'.

Table 2

No description provided.