Colton, E.
Max results
Sort by Reverse order

Showing 10 of 5436 results

Date

Decay distributions in the reaction k+ p ---> k*0(1420) delta++ at 5 gev/c and quark model predictions

Eskreys, A. ; Malecki, P. ; Zalewski, K. ; et al.
Nucl.Phys.B 29 (1971) 587-600, 1971.
Inspire Record 68631 DOI 10.17182/hepdata.33559

Joint decay distributions have been studied in the reaction K + p → K ∗o (1420)Δ ++ at 5.0 GeV/ c in the transversity spin reference frame. Two alternative spin-parity assignments 2 + and 3 − for the K ∗ resonance have been considered and a comparison with the quark-model predictions has been made. The predictions of the quark model are equally well satisfied by the experimental results for both the 2 + and 3 − spin-parity assignments.

1 data table
Table 1

No description provided.


Y*(1385) production in anti-p reactions at 5.7 gev/c

Atherton, H.W. ; Celnikier, L.M. ; Clayton, M.J. ; et al.
Nucl.Phys.B 29 (1971) 477-503, 1971.
Inspire Record 68633 DOI 10.17182/hepdata.33412

From a bubble chamber exposure in an antiproton beam at 5.7 GeV/ c yielding 13 events/μb, the final states p ̄ p → Y 1 ∗+ (1385)Λ, Y 1 ∗+ (1385)Σ + , Y 1 ∗+ (1385) Y 1 ∗+ (1385) have been isolated. We have measured the total cross section, d σ /d t , and the complete density matrix of the Y ∗ for these processes. Upper limits have been set to the forbidden reactions p ̄ p → Y 1 ∗− (1385)Σ − , Y 1 ∗− (1385) Y 1 ∗− (1385) .

35 data tables
Table 1

VALUE OF PRODUCTION CROSS-SECTION IN TEXT HALVED AS INCLUDED CHARGE CONJUGATE REACTION.

Table 2

VALUE OF PRODUCTION CROSS-SECTION IN TEXT HALVED AS INCLUDED CHARGE CONJUGATE REACTION.

Table 3

No description provided.

More…

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.


Determination of the proton proton elastic cross-section at 30-GeV center-of-mass energy

Holder, M. ; Radermacher, E. ; Staude, A. ; et al.
Phys.Lett.B 35 (1971) 361-364, 1971.
Inspire Record 69227 DOI 10.17182/hepdata.28484

The absolute luminosity of the CERN Intersecting Storage Rings has been determined by the Van der Meer method. Combining the measurement with small angle proton-proton elastic events, we find σ elastic = (6.8±0.6)mb.

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.


Preliminary results concerning the reaction e+ e- ---> p anti-p at a total energy of 2.1 gev

Di Giugno, G. ; Humphrey, J.W. ; Sassi, E. ; et al.
Lett.Nuovo Cim. 2S2 (1971) 873-877, 1971.
Inspire Record 70981 DOI 10.17182/hepdata.37402

None

1 data table
Table 1

No description provided.


Observation of small angle proton proton elastic scattering at 30 gev and 45 gev center-of-mass energies

Holder, M. ; Radermacher, E. ; Staude, A. ; et al.
Phys.Lett.B 35 (1971) 355-360, 1971.
Inspire Record 69228 DOI 10.17182/hepdata.5781

Small angle elastic scattering events have been observed at the CERN Intersecting Storage Rings. Directions of both particles as well as the collision vertex are reconstructed with the help of four sets of spark chambers, two for each of the two arms. The elastic nature of the events is demonstrated by a collinearity requirement. We find values for the (diffraction) slope parameter in disagreement with the simple linear extrapolation of lower energy (Surpukov) data.

4 data tables
Table 1

NUMBER OF EVENTS 87364.

Table 2

NUMBER OF EVENTS 8305.

Table 3

No description provided.

More…

Pi- p charge exchange at backward angles

Chase, R.C. ; Coleman, E. ; Courant, H.W.J. ; et al.
Phys.Rev.D 2 (1970) 2588-2599, 1970.
Inspire Record 68333 DOI 10.17182/hepdata.24261

Results of a measurement of the π−p charge-exchange process at backward angles are presented. Differential cross sections were measured in the angular region −0.5<cosθ*<−1.0 at incident momenta of 2, 3, 4, 5, and 6 GeV/c. An additional background subtraction to a version of the data published previously has a significant effect at 6 GeV/c and brings the data into agreement with more recent measurements. The 6-GeV/c data were combined with existing measurements of the differential cross sections for backward π+p and π−p elastic scattering to yield values for the isotopic-spin-½ and −32 u-channel and s-channel amplitudes for backward pion-nucleon scattering and for the magnitude of the phases between them. It is found that the u-channel amplitudes can be explained by pure Regge-pole (Δδ, Nα) exchange only near the extreme backward direction, but that a Reggeized absorption model agrees at least qualitatively with the data. The phase difference between the I=12 and 32 s-channel amplitudes is approximately 90° over the region −0.8<u<0 (GeV/c)2.

5 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Polarised target asymmetry for pi-zero photoproduction at 4 gev.

Booth, P.S.L. ; Boyes, E. ; Court, G.R. ; et al.
Conf.Proc.C 710830 (1971) 213-215, 1971.
Inspire Record 1093328 DOI 10.17182/hepdata.70366

None

1 data table
Table 1

No description provided.