Deregel, J.
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Upper limits on rare two-body processes in k- p and anti-p p scattering at high energies

Birnbaum, D. ; Edelstein, R.M. ; Hien, N.C. ; et al.
Phys.Lett.B 31 (1970) 36-39, 1970.
Inspire Record 63230 DOI 10.17182/hepdata.6079

A missing mass spectrometer search was made for several two-body, double charge exchange reactions, including backward K −p and p̄p elastic scattering at 8 and 16 GeV/ c and small momentum transfer. No examples of any of these processes were observed.

2 data tables
Table 1

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

Table 2

No description provided.


Measurement of the polarization in backward angle [pi]+p elastic scattering between 2.50 and 3.75 GeV/c

Sherden, David J. ;
EFI-70-38, 1970.
Inspire Record 1113359 DOI 10.17182/hepdata.43799

None

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Electromagnetic proton form-factors at squared four momentum transfers between 1-GeV/c**2 and 3-GeV/c**2

Bartel, W. ; Busser, F.W. ; Dix, W.R. ; et al.
Phys.Lett.B 33 (1970) 245-248, 1970.
Inspire Record 63047 DOI 10.17182/hepdata.45284

Electron-proton elastic scattering cross sections have been measured at four-momentum transfers between 1.0 and 3.0 (GeV/ c ) 2 and at electron scattering angles between 10° and 20° and at about 86° in the laboratory. The proton electromagnetic form factors G E and G M were determined. The results indicate that G E ( q 2 ) decreases faster with increasing q 2 than G M ( q 2 ).

2 data tables
Table 1

Axis error includes +- 2.5/2.5 contribution (Due to counting statisticss, separation of elastic events, beam monitoring, incident energy, scattering angle, proton absorption, solid angle, target length and density).

Table 2

CONST(NAME=MU) is the magnetic moment.


Direct measurement of n-p and n-d total cross-sections from 700 mev/c to 2900 mev/c

Mischke, R.E. ; Devlin, T.J. ; Johnson, W. ; et al.
Phys.Rev.Lett. 25 (1970) 1724-1727, 1970.
Inspire Record 62826 DOI 10.17182/hepdata.21646

Neutron-proton and neutron-deuteron total cross sections have been measured directly at the Princeton-Pennsylvania Accelerator using time of flight to determine the incident neutron momentum. The results cover the region from 700 to 2900 MeVc with a typical accuracy of 0.8% for each of 26 momentum bins. The data are not consistent with the most precise previous measurements in the same momentum range.

1 data table
Table 1

No description provided.


Measurement of the proton-antiproton total annihilation cross section at low energy

Cline, D. ; English, J. ; Reeder, D.D. ;
Phys.Rev.Lett. 27 (1971) 71-74, 1971.
Inspire Record 68958 DOI 10.17182/hepdata.21462

The p¯p total inelastic cross section has been measured in a hydrogen bubble chamber for p¯ momenta from 100 to 550 MeV/c. Below 200 MeV/c the cross section increases rapidly to several barns. From this behavior it is inferred that high partial waves, perhaps to L=3, are important in the annihilation at the lowest momenta studied. An abrupt change in the momentum dependence of the total absorption cross section occurs at about 350 MeV/c in the vicinity of previously observed structure in backward elastic scattering.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Anti-p p annihilation into pi+ rho at small angles between 1 and 2 gev/c

Yoh, J.K. ; Barish, B. ; Nicholson, H.W. ; et al.
Phys.Rev.Lett. 26 (1971) 922-925, 1971.
Inspire Record 69017 DOI 10.17182/hepdata.21588

We have studied the process p¯p into π+X− using wire spark chambers. The data cover the angular range of cosθp¯π+* between 0.96 and 1.0 at several incident momenta between 1 and 2 GeVc. The reaction p¯p→π+ρ− was observed with (dσdΩ)* of the order of 100 μb/sr at several momenta.

1 data table
Table 1

READ FROM GRAPH.


Pi- p elastic scattering near 180 degrees between 600 and 1280 mev/c

Crabb, D.G. ; Keller, R. ; O' Fallon, J.R. ; et al.
Phys.Rev.Lett. 27 (1971) 216-219, 1971.
Inspire Record 68952 DOI 10.17182/hepdata.21460

The differential cross sections for π−p elastic scattering over the angular range 155° to 177° in the center of mass have been measured at 33 incident-pion momenta in the range 600 to 1280 MeV/c. Angular distributions are presented. The extrapolated differential cross sections at 180° show considerable structure, in particular a dip near 1150 MeV/c. In general the near-180° cross sections do not agree with existing phase shift solutions above 1000 MeV/c

48 data tables
Table 1

INTERPOLATED DATA.

Table 2

INTERPOLATED DATA.

Table 3

INTERPOLATED DATA.

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A2+ mass spectrum in pi+ p interactions at 3.7 gev/c

Barnham, K.W.J. ; Abrams, G.S. ; Butler, W.R. ; et al.
Phys.Rev.Lett. 26 (1971) 1494-1498, 1971.
Inspire Record 68979 DOI 10.17182/hepdata.21630

A study of the A2+ mass spectrum in π+p interactions at 3.7 GeVc is presented. For a cut of t′=0.1−2.0 GeV2 and on eliminating the Δ++ we find that the three-pion mass spectrum in the A2+ region is fitted by the dipole formula with a confidence level of 53% and a single Breit-Wigner formula with a confidence level of 11%. Our result thus favors A2+ splitting although a single Breit-Wigner fit cannot be ruled out. We also report the A2+ decay branching fractions measured over all t′ values. They are 0.78 ± 0.05, 0.15 ± 0.04, 0.06 ± 0.03, and < 0.02 for ρπ, ηπ, KK¯, and η′π, respectively, in good agreement with other experiments.

1 data table
Table 1

No description provided.


Additional data in the reaction pi+ p ---> sigma+ k+ at 1.28 and 1.41 gev/c and a test of charge independence in the center-of-mass energy range 1.820 to 2.090 gev

Kalmus, G.E. ; Borreani, G. ; Louie, J. ;
Phys.Rev.D 4 (1971) 916-918, 1971.
Inspire Record 67769 DOI 10.17182/hepdata.23075

Data at two additional π+ momenta (1.28 and 1.41 GeVc) in the reaction π+p→Σ+K+ are presented. Charge independence is tested over the c.m. energy range 1.820 to 2.090 GeV; we used our data for the Σ+K+ channel and published data for the π−p→Σ0K0 and Σ−K+ channels.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Study of the two-charged-particle final states of 3.9-gev/c pi+- p interactions including a longitudinal-momentum analysis of the one-pion- production channels

Bastien, P.L. ; Carmel, Z. ; Dao, F.T. ; et al.
Phys.Rev.D 3 (1971) 2047-2064, 1971.
Inspire Record 68000 DOI 10.17182/hepdata.23677

We have analyzed the two-prong final states in π+p interactions at 3.9 GeVc. Our result for elastic scattering is σ (elastic) = 6.50±0.1 mb (statistical error only). We find the elastic slope to be 6.61±0.14 (GeVc)−2. We find the elastic forward cross section to be 40.0±1.4 mb(GeVc)2. We have applied a longitudinal-momentum analysis to the one-pion-production channel. We find the cross section for the reaction π++p→π++π0+p to be 2.30±0.06 mb and that for π++p→π++π++n to be 1.45±0.05 mb. For resonance-production cross sections in these channels we find Δ(1236)=0.60±0.07 mb, ρ(760)=0.86±0.06 mb, and diffraction dissociation = 1.69±0.11 mb. We find that we can satisfactorily fit all distributions in the one-pion-production channel without assuming any phase-space production. In the missing-mass channel we observe dominant Δ++(1236) production plus evidence for A2+ production.

15 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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