Loomis, W.A.
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K0(s) k- decay of a2- produced by 20.3-gev/c pi- on hydrogen

Foley, K.J. ; Love, W.A. ; Ozaki, S. ; et al.
Phys.Rev.D 6 (1972) 747-756, 1972.
Inspire Record 73969 DOI 10.17182/hepdata.22252

We present the results of an analysis of data for the reaction π−p→KS0K−p at 20.3-GeV/c incident π momentum. We find that the K0K− effective-mass spectrum shows a single peak in the A2 region which is well fitted by a Breit-Wigner shape. The data in the A2-peak region are inconsistent with the split-A2 shape reported earlier. The distribution in t of the A2 events shows a forward dip followed by an exponential falloff. The A2 decay angular distribution is well fitted by a single resonance with quantum numbers JP=2+. The results of an analysis of the density-matrix elements for this reaction are given.

2 data tables
Table 1

CORRECTED FOR UNSEEN K0 DECAYS AND FOR BREIT-WIGNER RESONANCE TAILS.

Table 2

INCLUDING THE DENSITY MATRIX ELEMENTS OMITTED FROM THIS FIT GIVES NO SIGNIFICANT IMPROVEMENT AND THE NEW PARAMETERS ARE CLOSE TO ZERO. LIM INDICATES FITTED VALUE LIMITED FROM VARIATION BY PHYSICAL CONSTRAINTS FROM OTHER PARAMETERS.


Absence of discrete s-channel resonances in anti-p p interactions at intermediate energies

Fields, T. ; Cooper, W.A. ; Rhines, D.S. ; et al.
Phys.Rev.Lett. 27 (1971) 1749-1752, 1971.
Inspire Record 75556 DOI 10.17182/hepdata.21475

We give new experimental results on ρω interference and two-body cross sections in p¯p annihilation at 2.3GeVc. These are used, together with ρω interference results from lower energies, to argue that the annihilation process is not mediated by discrete s-channel mesonic resonances in the mass range 2.1-2.6 GeV.

1 data table
Table 1

No description provided.


Nucleon Isobar Production in Proton-Proton Collisions between 3 and 7 GeVc

Ankenbrandt, C.M. ; Clark, A.R. ; Cork, Bruce ; et al.
Phys.Rev. 170 (1968) 1223-1236, 1968.
Inspire Record 54418 DOI 10.17182/hepdata.26506

A systematic study has been made of the reactions pp→pp and pp→pN* in the angular range from θlab=10∘ to θc.m.=90∘ at 3, 4, 5, 6, and 7 GeVc. An orthogonal dispersion magnetic spectrometer detected protons from interactions in hydrogen with momentum transfer (−t) in excess of 0.5 (GeV)2. Well-defined peaks in the missing-mass spectra occurred at average N* masses of 1240±6, 1508±2, and 1683±3 MeV with average full widths of 102±4, 92±3, and 110±4 MeV, respectively. Below 2400 MeV no other significant enhancements were found. The N* production cross sections dσdt near θc.m.=90∘ are in qualitative agreement with the predictions of the statistical model. For each isobar the differential cross section at fixed energy varies as exp(−vv0), where v≡[−tu(t+u)]; v0 varies systematically with energy and tends toward the same value (≈0.4 GeV2) for each isobar at the upper limit of our energy range.

1 data table
Table 1

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


High-energy, small angle, p p and anti-p p scattering and p p total cross-sections

Foley, K.J. ; Jones, R.S. ; Lindenbaum, S.J. ; et al.
Phys.Rev.Lett. 19 (1967) 857-859, 1967.
Inspire Record 51178 DOI 10.17182/hepdata.3459

None

5 data tables
Table 2

No description provided.

Table 3

No description provided.

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Elastic Scattering of Protons, Antiprotons, Negative Pions, and Negative Kaons at High Energies

Foley, K.J. ; Gilmore, R.S. ; Lindenbaum, S.J. ; et al.
Phys.Rev.Lett. 15 (1965) 45-50, 1965.
Inspire Record 49102 DOI 10.17182/hepdata.204

None

7 data tables
Table 1

'1'. '2'. '3'. '4'.

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Small-Angle Elastic Scattering of Protons and Pions, 7-20 BeV/c

Foley, K.J. ; Lindenbaum, S.J. ; Love, W.A. ; et al.
Phys.Rev.Lett. 11 (1963) 425-429, 1963.
Inspire Record 46642 DOI 10.17182/hepdata.228

None

8 data tables
Table 1

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

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Antiproton and Kaon Elastic Scattering at High Energies

Foley, K.J. ; Lindenbaum, S.J. ; Love, W.A. ; et al.
Phys.Rev.Lett. 11 (1963) 503-506, 1963.
Inspire Record 44671 DOI 10.17182/hepdata.208

None

5 data tables
Table 1

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

Table 2

No description provided.

Table 3

No description provided.

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Polarization in pi--p Scattering between 500 and 940 Mev

Beall, E.F. ; Cork, B. ; Murphy, P.G. ; et al.
Phys.Rev. 126 (1962) 1554-1560, 1962.
Inspire Record 944982 DOI 10.17182/hepdata.26812

A graphite-plate spark chamber has been used to analyze the polarization of protons recoiling from π−−p scattering. The observations were made at 90° (c.m. system) pion scattering angle for seven incident pion energies between 500 and 940 Mev, at 120° or 135° for five energies in this interval, and also at 75° for 500 Mev only. The results are compared with predictions of several models used to explain the maxima in the π−−p scattering cross section. Qualitative arguments show that the energy intervals between these maxima are not completely dominated by neighboring single-state resonances. Phase shifts found to be large in scattering also seem to be large in polarization.

10 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Antiproton-Proton and Proton-Proton Total Cross Sections from 4 to 20 Bev/c

Lindenbaum, S.J. ; Love, W.A. ; Niederer, J.A. ; et al.
Phys.Rev.Lett. 7 (1961) 185-188, 1961.
Inspire Record 944907 DOI 10.17182/hepdata.191

None

2 data tables
Table 1

'1'. '2'. '3'. '4'.

Table 2

No description provided.


K--p and K--n Cross Sections in the Momentum Range 1-4 Bev/c

Cook, V. ; Cork, Bruce ; Hoang, T.F. ; et al.
Phys.Rev. 123 (1961) 320-332, 1961.
Inspire Record 46822 DOI 10.17182/hepdata.26808

The energy dependence of the K−-nucleon total cross sections has been measured over the K− momentum range 0.98-3.98 Bev/c. K−−n cross sections were obtained by deuterium-hydrogen subtraction, with a correction for screening effects. There is evidence for structure in the T=0 K−-nucleon state in the momentum range 0.98-2.0 Bev/c. This structure is absent in the T=1 state. In addition, a measurement was made at 1.95 Bev/c of the angular distribution of the K−−p elastic scattering at small angles. The forward-scattering amplitude obtained from the data gives a ratio of real part to imaginary part 0.5±0.2 at 00. The corresponding ratio for π− mesons at this momentum was found to be 0.4−0.4+0.2. Measurements of the K−−p "elastic" charge exchange gives a cross section which falls from about 10 mb at 1 Bev/c to at most a few mb at 4 Bev/c.

1 data table
Table 1

No description provided.