Engelmann, Roderich J.
Max results
Sort by Reverse order

Showing 10 of 6778 results

Date

Further results on small angle elastic proton proton scattering at very high energies

Holder, M. ; Radermacher, E. ; Staude, A. ; et al.
Phys.Lett.B 36 (1971) 400-402, 1971.
Inspire Record 69148 DOI 10.17182/hepdata.28407

This work extends our previous investigations at the CERN Intersecting Storage Rings, with improved statistics at three different energies, wider angular range and a better control over systematic errors. Values for the (diffraction) shape parameter b are given.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Momentum transfer dependence of nucleon resonance production in proton proton collisions at 24 gev/c

Amaldi, U. ; Biancastelli, R. ; Bosio, C. ; et al.
Phys.Lett.B 34 (1971) 435-438, 1971.
Inspire Record 69310 DOI 10.17182/hepdata.28714

Nucleon resonance production in the two-body reaction p + p → p + N ∗ has been studied at 24 GeV/ c incident momentum for angles from 12 to 117 mrad by measuring proton momentum spectra from the elastic peak down to a momentum corresponding to a missing mass of about 2.6 GeV.

1 data table
Table 1

No description provided.


Observation of k(l) - k(s) regeneration from liquid hydrogen. aachen-cern-turin collaboration,

Darriulat, P. ; Grosso, C. ; Holder, M. ; et al.
Phys.Lett.B 33 (1970) 433-437, 1970.
Inspire Record 69387 DOI 10.17182/hepdata.28718

The K L K S transmission regeneration of a K L beam traversing a liquid hydrogen target has been observed over the momentum interval 3.0–6.0 GeV/ c . Results are in good agreement with predictions based on dispersion relations.

2 data tables
Table 1

Regeneration amplitude.

Table 2

No description provided.


The reactions pi- p ---> n pi0 and pi- p ---> n eta0 in the backward hemisphere

Boright, J.P. ; Bowen, D.R. ; Groom, Donald E. ; et al.
Phys.Lett.B 33 (1970) 615-619, 1970.
Inspire Record 69352 DOI 10.17182/hepdata.28717

Cross sections for π − p→n π o at 5.9, 10.1 and 13.8 GeV/ c incident momentum are presented in the angular region from 180 o to u , the crossed four-momentum transfer squared, of −2(GeV) 2 and the energy dependence is discussed. The cross section for π − p→n η o integrated over the same angular region at 5.9 GeV/ c is also presented.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


Elastic forward and backward scattering of pi- and k-mesons at 5.2 and 7.0 gev/c

Baker, W.F. ; Berkelman, Karl ; Carlson, P.J. ; et al.
Nucl.Phys.B 25 (1971) 385-410, 1971.
Inspire Record 68816 DOI 10.17182/hepdata.33834

We present results of measurements of the differential cross sections for the following elastic-scattering reactions: (i) π + p at 5.2 and 7.0 GeV/ c in the range −1 < u < 0.02 (GeV/ c ) 2 , (ii) π − p at 7.0 GeV/ c in the range −0.7 < u < 0.05 (GeV/ c ) 2 , (iii) K + p at 5.2 and 7.0 GeV/ c in the ranges −1 < t < −0.01 (GeV/ c ) 2 and −1 < u < 0 (GeV/ c ) 2 , and K − p at 7.0 GeV/ c in the range −1 < u < 0 (GeV/ c ) 2 .

9 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

SIDE GEOMETRY.

More…

Measurement of neutron-proton charge exchange scattering at 8, 19 and 24 gev/c

Engler, J. ; Horn, K. ; Moennig, F. ; et al.
Phys.Lett.B 34 (1971) 528-532, 1971.
Inspire Record 69285 DOI 10.17182/hepdata.28571

The t -dependence of the differential cross-section for elastic neutron-proton charge exchange scattering has been measured at 8, 19.2 and 24 GeV/ c . The extremely narrow peak in the forward direction, previously observed for momenta up to 8 GeV/ c , presists at the higher momenta, and the t -dependence shows practically no change with energy. Approximate values of the absolute cross-section were also determined for these momenta.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Resonance production in k- neutron interactions at k- momenta of 1.45 and 1.65 gev/c

Colley, D.C. ; Cox, G.F. ; Eastwood, D. ; et al.
Nucl.Phys.B 31 (1971) 61-85, 1971.
Inspire Record 68588 DOI 10.17182/hepdata.33257

Results are reported on K − -neutron interactions at c.m. energies near 2 GeV. The interactions are dominated by strong production of hyperon resonances, particularly Σ(1385), Λ(1405) and Λ(1520). Production cross sections and angular distributions are given for the Σ(1385), Λ(1405) and Λ(1520) and branching fractions to decay modes observed in the experiment are given for Σ(1385) and Λ(1520). The strong energy dependence of some features of the data suggests that s -channel effects are dominant.

6 data tables
Table 1

No description provided.

Table 2

RESONANCE CROSS SECTIONS FOR <K- PI- P> FINAL STATE.

Table 3

RESONANCE CROSS SECTIONS FOR <AK0 PI- N> FINAL STATE.

More…

Pi+ p elastic scattering at 3.6 gev/c

Macnaughton, J. ; Butler, W.R. ; Coyne, D.G. ; et al.
Nucl.Phys.B 33 (1971) 101-108, 1971.
Inspire Record 68509 DOI 10.17182/hepdata.33221

The elastic scattering of 3.6 GeV/ c π + mesons by protons has been studied in a hydrogen bubble chamber experiment. The elastic cross section has a measured value of 7.07 ± 0.20 mb. The forward diffraction peak has been fitted in the region 0.05 ≦ − t ≦ 0.6 (GeV/ c ) 2 by a form (d σ /d t ) = Ae Bt , where A = 46.5 ± 1.8 mb/(GeV/ c ) 2 and B = 6.85 ± 0.20 (GeV/ c ) −2 . From this fit and the optical theorem, the magnitude of the ratio of real to imaginary forward amplitude is 0.39 ± 0.06, in reasonable agreement with dispersion relation calculations and simple Regge model predictions.

3 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.


The annihilation process p anti-p ---> 2pi+ 2pi- pi0 at 2.5 gev/c

Clayton, J. ; Mason, P. ; Muirhead, H. ; et al.
Nucl.Phys.B 30 (1971) 605-616, 1971.
Inspire Record 68592 DOI 10.17182/hepdata.33476

Substantial production of the resonances ϱ, f and ω has been observed in this reaction. In contrast with the channel p p → 2π + 2π − , associated production of resonances was found to occur. The behaviour of the associated production of ω-mesons with other resonances is shown to be consistent with some very simple assumptions. Alternative methods of displaying data for p p → ππω are discussed; it is shown that the longitudinal phase plot for this reaction is unlike that obtained for any previously reported reaction. Reasonable agreement for the behaviour of this channel is found with the multiperipheral model of Chan, Łoskiewicz and Allison.

2 data tables
Table 1

STATISTICAL ERRORS ONLY. FOR MULTIPLE PI0 PRODUCTION, RESULTS ARE MODEL DEPENDENT.

Table 2

ANALYSIS OF 5PION FINAL STATE. DISTRIBUTION FITTED WITH FIXED MASS AND WIDTH RESONANCES, THEN ONLY EVENTS ABOVE (FITTED) BACKGROUND TAKEN. CROSS SECTIONS CALCULATED BY PDG (COMPILATION PDG3).


K- p elastic and charge-exchange scattering in the center-of-mass energy range 1915-2168 mev

Litchfield, P.J. ; Bacon, T.C. ; Butterworth, I. ; et al.
Nucl.Phys.B 30 (1971) 125-156, 1971.
Inspire Record 68612 DOI 10.17182/hepdata.33440

Total and differential cross sections are presented for the reactions K − p → K − p and K − p → K o n at 13 points in the c.m. energy range 1915–2168 MeV. An energy-dependent partial-wave analysis is carried out on these data together with the polarisation measurements of Daum et al. [1] and the total cross section measurements [2] within this energy range. The well known Σ(1915), Σ(2030) and Λ(2100) are observed and their resonance parameters measured. Structure is also found in the D 05 and F 07 waves. An SU(3) analysis of the 5 2 + octet, 7 2 + decuplet and 7 2 − singlet gives generally good agreement between theory and experiment except that the elasticity of the Σ(1915) is experimentally rather larger than predicted.

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

DETERMINED BY NORMALIZING AT ZERO DEG TO TOTAL CROSS SECTIONS VIA THE OPTICAL THEOREM.

More…