Adamova, D.
hep-ex
DSIG/DT
[3.989]
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Measurement of Elastic electron Scattering from the Proton at High Momentum Transfer

Arnold, R.G. ; Bosted, Peter E. ; Chang, C.C. ; et al.
Phys.Rev.Lett. 57 (1986) 174, 1986.
Inspire Record 228320 DOI 10.17182/hepdata.3133

We have performed absolute measurements of the differential cross section for elastic e−p scattering in the range of momentum transfer from Q2=2.9 to 31.3 (GeV/c)2. Combined statistical and systematic uncertainties in the cross-section measurements ranged from 3% at low Q2 to 19% at high Q2. These data have been used to extract the proton magnetic form factor GMp(Q2). The results show a smooth decrease of Q4GMp with momentum transfer above Q2=10 (GeV/c)2. These results are compared with recent predictions of perturbative QCD.

14 data tables
Table 1

No description provided.

Table 2

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Table 3

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ELASTIC SCATTERING AND PARTICLE PRODUCTION IN TWO PRONG PI- P INTERACTIONS AT 8-GEV/C

Kitagaki, T. ; Tanaka, S. ; Yuta, H. ; et al.
Phys.Rev.D 26 (1982) 1572-1587, 1982.
Inspire Record 182974 DOI 10.17182/hepdata.23945

Results of a high-statistics study of elastic scattering and meson resonances produced by π−p interactions at 8 GeV/c are presented. Large statistics and small systematic errors permit examination of the complete kinematic region. Total differential cross sections are given for ρ0,−, f0, g0,−, Δ±, Δ0, and N* resonances. Spin-density matrix elements and Legendre-polynomial moments are given for ρ, f, and Δ resonances. The results for ρ0 and f0 resonances are compared with the predictions of a Regge-pole-exchange model. Properties of the above resonances are compared and discussed. In particular, we present evidence that the ρ0 and f0 production mechanisms are similar. The similarity of the g0 t distribution to that of the ρ0 and f0 suggests a common production mechanism for all three resonances.

5 data tables
Table 1

No description provided.

Table 2

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Table 3

SLOPE REFERS TO EXPONENTIAL FIT IN U.

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THE REACTION ANTI-P P ---> DELTA (1236) ANTI-DELTA (1236) AT BEAM MOMENTA OF 7.23-GEV/C AND 12.0-GEV/C

Van Apeldoorn, G.W. ; Harting, D. ; Holthuizen, D.J. ; et al.
Z.Phys.C 12 (1982) 95-98, 1982.
Inspire Record 179937 DOI 10.17182/hepdata.16432

The reactionp→Δ(1236)\(\bar \Delta \)(1236) is studied at 7.23 GeV/c and at 12GeV/c in terms of the OPE model of Wolf. Good agreement between the model and experimental data is found for the mass andt distributions whereas for decay angular distributions the agreement is less satisfactory. A modified model, allowing for a spin orbit coupling, gives good agreement also for the angular distribution.

3 data tables
Table 1

No description provided.

Table 2

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Table 3

CROSS SECTION FOR -T < 0.14 GEV**2.


New Limits for the Exotic Exchange Reaction pi- p --> K+ Sigma- at 5-GeV and 8-GeV

Dekkers, D. ; Guillaud, J.P. ; Lepeltier, V. ; et al.
Nucl.Phys.B 131 (1977) 72-79, 1977.
Inspire Record 126514 DOI 10.17182/hepdata.35221

Measurement of the exotic exchange reaction π − p → K + Σ − has been performed at 5 and 8 GeV, in the −0.015 to −0.13 and −0.009 to −0.15 (GeV/ c ) 2 range of t repectively. We give the value near t = 0 of the differential cross section at 5 GeV, 21 −21 +76 nb/(GeV/ c ) 2 , and an upper limit (< 37 nb/GeV/ c ) 2 ) at 8 GeV. As a check the measured differential cross section is given at both energies for the reaction π + p → K + Σ + in the same range of t ★★ ★★ Results presented here were included in the thesis of Doctorat d′Etat by M.N. Minard, Orsay, France, 1976. .

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Elastic Scattering of pi-, K-, and anti-p from Hydrogen at 8-GeV/c and 16-GeV/c

Russ, J.S. ; Birnbaum, D. ; Edelstein, R.M. ; et al.
Phys.Rev.D 15 (1977) 3139-3154, 1977.
Inspire Record 124704 DOI 10.17182/hepdata.24650

In a single-arm spectrometer experiment, high-precision measurements of dσdt for π−p, K−p, and p¯p elastic scattering have been made at 8 and 16 GeV/c. The π−p data show rich structure at 8 GeV/c, indicative of strong non-Pomeron contributions, while the 16-GeV/c data are much smoother. For −t≳1 (GeV/c)2 there is a strong s dependence while there is very little for −t<1 (GeV/c)2. For p¯p scattering the forward region is smoothly diffractive for −t<0.4 (GeV/c)2 and shows antishrinkage. The exponential slope parameter b is measured to be 12.36 ± 0.04 (GeV/c)−2 at 8 GeV/c and 11.40 ± 0.04 (GeV/c)−2 at 16 GeV/c. The structure near −t=0.6 (GeV/c)2 seen at lower energies is still obvious at 16 GeV/c. The K−p data show some structure at 8 GeV/c, but can be represented adequately by a quadratic exponential form. At 16 GeV/c the K−p angular distribution shows antishrinkage and lies above the 8-GeV/c cross section for 0.11<−t<0.8 (GeV/c)2.

7 data tables
Table 1

No description provided.

Table 2

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Table 3

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A Study of the Final States anti-K0 n, Lambda pi0 and anti-K0 Delta0 in K- p Interactions at 5-GeV/c and 8-GeV/c

Gallivan, J. ; Astbury, P. ; Jafar, J. ; et al.
Nucl.Phys.B 117 (1976) 269-292, 1976.
Inspire Record 110114 DOI 10.17182/hepdata.35539

We present results on three reactions involving neutral final states which were studied in a magnet spark chamber system. These results are: (a) differential cross section with high statistics for K − p → K 0 n at 5 GeV /c (24 000 events) and at 8 GeV/ c (11 000 events) for t′ <2.0 (GeV/ c ) 2 ; (b) differential cross section and polarization for K − p → Λπ 0 (backward peak) at 5 GeV/ c for u ′ < 1.4 GeV/ c ) 2 ; and (c) differential cross section for K − p → K 0 Δ 0 (1232) at 5 GeV /c for t′ < 1.2 ( GeV /c) 2 . We compare our results with existing data and draw some phenomenological conclusions.

7 data tables
Table 1

Axis error includes +- 0.0/0.0 contribution (?////TP INDEPENDENT CORRECTIONS AT 5 AND 8 GEV ARE 5.143 +- 0.418 AND 4.981 +- 0.436 RESPECTIVELY).

Table 2

Axis error includes +- 0.0/0.0 contribution (?////TP INDEPENDENT CORRECTIONS AT 5 AND 8 GEV ARE 5.143 +- 0.418 AND 4.981 +- 0.436 RESPECTIVELY).

Table 3

Axis error includes +- 0.0/0.0 contribution (?////UP INDEPENDENT CORRECTION FACTOR IS 3.840 +- 0.323).

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Resonance Production in the Reaction K+ p --> K0 p pi+ at 5-GeV/c, 8.25-GeV/c and 16-GeV/c

Colley, D.C. ; Carney, J.N. ; James, M.F. ; et al.
Nucl.Phys.B 110 (1976) 333-354, 1976.
Inspire Record 108770 DOI 10.17182/hepdata.35742

We present a systematic analysis of the production of K ∗+ (892) and Δ ++ (1236) resonances in the K + p → K 0 p π + reaction at 5, 8.25 and 16 GeV/ c . We have measured total cross sections, differential cross sections, density matrix elements and examined resonance production mechanisms in terms of the exchange of states with definite naturality. Some results on the reaction K + p → K ∗+ (1420) p are also given.

6 data tables
Table 1

No description provided.

Table 2

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Table 3

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Study of the p pi- System Produced in Reaction K+ n --> K+ pi- p at 8.25-GeV/c and Comparison with Data at 4.6-GeV/c and 12-GeV/c

Vignaud, D. ; Ginestet, J. ; Cornet, P. ; et al.
Nucl.Phys.B 102 (1976) 20-50, 1976.
Inspire Record 2885 DOI 10.17182/hepdata.36020

The fragmentation of the neutron into p π − induced by incident K + of 8.25 GeV/ c is studied using data from the CERN 2 m deuterium bubble chamber and compared with data at 4.6 and 12 GeV/ c . The p π − low-mass enhancement below 1.85 GeV is analyzed and the major part exhibits the properties expected for diffraction dissociation. The presence of resonances is discussed. The data are fairly well represented by a double Regge exchange model involving pion and pomeron exchanges. The violation of the s -channel and t -channel helicity conservation is observed and compared to the s -channel description of Humble.

1 data table
Table 1

INTERCEPT AND SLOPE OF DIFFERENTIAL CROSS SECTION FOR -TP < 0.24 (0.48 FOR N1700) GEV**2.


Study of the reaction k+ p ---> k*0(890) delta++ from 4.6-16.0 gev/c

Ciapetti, G. ; Eisner, R.L. ; Irving, A.C. ; et al.
Nucl.Phys.B 64 (1973) 58-108, 1973.
Inspire Record 94946 DOI 10.17182/hepdata.6741

A systematic analysis is presented on the reaction K + p → K ∗0 (890) Δ ++ for nine incident momenta between 4.6–16.0 GeV/ c . Cross sections, differential cross sections and vector meson single density matrix elements are given. As a function of energy, little if any change is observed in either the shapes of the differential cross sections or in the values of the density matrix elements. The data are interpreted in terms of current ideas on t -channel exchange mechanisms.

20 data tables
Table 1

No description provided.

Table 2

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Table 3

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The charge exchange anti-p p ---> anti-n n at 5.0 and 7.76 gev/c near the forward direction

Lee, J.G. ; Harckham, A. ; Letheren, M. ; et al.
Nucl.Phys.B 52 (1973) 292-300, 1973.
Inspire Record 84235 DOI 10.17182/hepdata.32683

The differential cross section for the charge exchange p p → n n has been measured with high statistics at 7.76 GeV/ c and at 5.0 GeV/ c . The 7.76 GeV/ c data show a very narrow [ Δt ⪅ 0.01 (GeV/ c ) 2 ] forward peak superposed on a slow exponential fall-off.

3 data tables
Table 1

No description provided.

Table 2

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Table 3

INTEGRATED CROSS SECTIONS FROM EXPONENTIAL FIT.