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Proton Compton scattering between 650 mev and 1350 mev

Barton, J.S. ; Booth, P.S.L. ; Carroll, L.J. ; et al.
Phys.Lett.B 42 (1972) 297-300, 1972.
Inspire Record 85012 DOI 10.17182/hepdata.28187

Compton scattering from protons has been measured between 650 MeV and 1350 MeV for angles between 60° and 140° CM.

1 data table
Table 1

No description provided.


Differential cross-sections for the photoproduction of eta mesons from protons near 2 gev

Booth, P.S.L. ; Carroll, L.J. ; Holt, J.R. ; et al.
Nucl.Phys.B 71 (1974) 211-216, 1974.
Inspire Record 94714 DOI 10.17182/hepdata.32321

Differential cross sections for the process γ p → p η have been measuredd at c.m. angles of 28°, 35° and 42° at incident energies between 2 GeV and 2.8 GeV. Data from an earlier experiment below 2 GeV have been re-analysed and corrected. The whole set of data is compared with the form ( s − M 2 ) 2 d σ /d t , which fits data at higher energies. There is good agreement above 2 GeV, particularly at the largest angle, but strong departures below.

2 data tables
Table 1

No description provided.

Table 2

THESE DATA ARE A REANALYSIS OF THOSE REPORTED IN P. S. L. BOOTH ET AL., NP B25, 510 (1971). THE CORRECTED RESULTS ARE IN GENERAL ABOUT TWICE THE OLD VALUES.


Photoproduction of k+ lambda0 and k+ sigma0 from hydrogen at constant momentum transfer t between 1.05 and 2.2 gev

Feller, P. ; Menze, D. ; Opara, U. ; et al.
Nucl.Phys.B 39 (1972) 413-420, 1972.
Inspire Record 75243 DOI 10.17182/hepdata.32925

For the reaction γ p → K + Λ 0 the differential cross section has been measured at t = −0.147 GeV 2 ( θ C.M. = 26.5 ± 3.5°) and photoenergies between 1.05 and 2.2 GeV and for the reaction γ p→K + Σ 0 at ≈−0.17 GeV 2 ( θ C.M. = 28±3.5°) and photoenergies between 1.3 and 2.2 GeV. For this four momentum transfer the differential cross section of K + Λ 0 photoproduction has a surprising steep increase above threshold and stays nearly constant up to 2.2 GeV. The K + Σ 0 cross section increases from 1.3 to 1.56 GeV and goes down gradually at higher energies.

2 data tables
Table 1

AT CONSTANT MOMENTUM TRANSFER OF -T = 0.147 GEV**2.

Table 2

AT APPROXIMATELY CONSTANT MOMENTUM TRANSFER OF -T = 0.17 GEV**2.


Observation of cascade hyperon interactions

Muller, R.A. ;
Phys.Lett.B 38 (1972) 123-124, 1972.
Inspire Record 75877 DOI 10.17182/hepdata.28337

We report on the observation of 17Ξ o + p interactions in the Berkeley 72″ Hydrogen Bubble Chember, Cross-sections are calculated for both elastic and inelastic channels.

1 data table
Table 1

EACH CROSS SECTION BASED ON ONE EVENT, EXCEPT AS NOTED.


Photoproduction of eta-mesons on hydrogen at photon energies between 1.5 and 2.2 gev

Christ, A. ; Husmann, D. ; Jansen, W. ; et al.
Lett.Nuovo Cim. 8S2 (1973) 1039-1043, 1973.
Inspire Record 86582 DOI 10.17182/hepdata.37327

None

1 data table
Table 1

APPROXIMATELY CONSTANT MOMENTUM TRANSFER.


Measurement of Total Cross-Sections of Hadron Photoproduction in C, Cu and Pb Nuclei at E(gamma) = 12-GeV to 30-GeV

Arakelian, E.A. ; Bayatian, G.L. ; Vartanian, G.S. ; et al.
Phys.Lett.B 79 (1978) 143-146, 1978.
Inspire Record 122947 DOI 10.17182/hepdata.27424

The total cross section of hadron photoproduction on C, Cu and Pb nuclei is measured for six energy values in the range 12–30 GeV. The obtained cross-section values for C and Cu nuclei have a weak energy dependence at high energies (above 20 GeV). The cross section for the Pb nucleus is somewhat higher in comparison with that expected, and energy dependence is not observed. The A -dependence of the effective number of hadrons agrees with VDM predictions.

2 data tables
Table 1

No description provided.

Table 2

A-EFFECTIVE/A = SIG(GAMMA A)/(Z*SIG(GAMMA P) + (A-Z)*SIG(GAMMA N)) WHERE SIG(GAMMA P) = (98.7 +- 3.6) + (65 +- 10)/SQRT(P) MUB, SIG(GAMMA N) = SIG(GAMMA P) - (18.3 +- 6.1)/SQRT(P) MUB AND A IS 12, 64 AND 207 FOR THESE NUCLEI.


A measurement of the total cross-sections for lambda hyperon interactions on protons and neutrons in the momentum range from 6 gev/c to 21 gev/c

Gjesdal, S. ; Presser, G. ; Steffen, P. ; et al.
Phys.Lett.B 40 (1972) 152-156, 1972.
Inspire Record 75732 DOI 10.17182/hepdata.28286

The Λp, Λn, Λ p, and Λ n total cross-sections were measured in the Λ momentum interval 6–21 GeV/ c . Within the experimental uncertainties the cross-sections are momentum-independent in this interval and the momentum-averaged cross-sections are found to be: σ ( Λp ) = 34.6 ± 0.4 mb : σ ( Λn ) = 34.0 ± 0.8 mb ; σ ( Λp ) = 56 ± 11 mb ; σ ( Λn ) = 46 ± 20 mb . The first two results are in agreement with charge symmetry, and with simple quark model sum rules applied to previous results on pp, K - n, and π + p total cross-sections.

2 data tables
Table 1

NO SIGNIFICANT MOMENTUM DEPENDENCE OVER THIS INTERVAL. 2.8 +- 0.3 MB SHADOWING CORRECTION APPLIED FOR NEUTRON CROSS SECTION.

Table 2

6 MB SHADOWING CORRECTION APPLIED FOR NEUTRON CROSS SECTION.


Elastic anti-p d scattering at 5.55 gev/c incident momentum

Braun, Henri ; Fridman, A. ; Jegham, E. ; et al.
Nucl.Phys.B 54 (1973) 61-77, 1973.
Inspire Record 84177 DOI 10.17182/hepdata.32581

Based on 150 000 photographs taken at the ZGS with the 30 inch deuterium-filled chamber we present an analysis of the elastic p d scattering reaction. Due to unrecoreded small deuteron recoils we were only able to measure the elastic cross section in the four-momentum region | t | > 0.03 (GeV/ c ) 2 . Extrapolation towards small | t | by two different methods gave us two compatible estimates of the total elastic cross section. The differential cross section was analyzed by means of the Glauber formalism both with and without the effects due to the D-wave part of the deuteron wave function. The differential cross sections of np at 5.4 GeV/ c and pn deduced from our data were compared and exhibit a crossover phenomenon.

2 data tables
Table 1

CALCULATED USING TOTAL ELASTIC SIG(-T > 0.03 GEV**2) = 7.2 +- 0.4. THE SMALL ANGLE SCATTERING APPROXIMATION HOLDS: D(SIG)/DOMEGA(RF=LAB) = (P**2/PI)*D(SIG)/DT.

Table 2

INTEGRATED CROSS SECTION USING EITHER EXPONENTIAL EXTRAPOLATION OR GLAUBER MODEL FIT FOR -T < 0.03 GEV**2.


Study of the reaction anti-p n ---> anti-p pi- p at 7.0 gev/c

Antich, P. ; Carson, R. ; Chien, C.Y. ; et al.
Nucl.Phys.B 43 (1972) 45-61, 1972.
Inspire Record 75088 DOI 10.17182/hepdata.32868

From a 3.5 ev/μb exposure of the BNL 80 inch chamber filled with deuterium to a 7.0 GeV/ c p beam we obtained 664 events in the channel p n → p π − p . The channel cross section is (1270 ± 110 60 ) μb. The final state is dominated by Δ (1230) production. The experimental data is well described by a one-pion exchange model with off-mass shell corrections.

1 data table
Table 1

No description provided.


Anti-p p annihilation into pi+ rho- at 5 gev/c

Eide, A. ; Lehmann, P. ; Lundby, A. ; et al.
Phys.Lett.B 41 (1972) 225-228, 1972.
Inspire Record 75630 DOI 10.17182/hepdata.28228

We have measured the differential cross-section for the reaction p p → π + Λ − at 5 GeV /c , the π + being in t he cm angular range 0.47 < cos θ p π + cm < 0.98 , corresponding to 0.12 < − t < 2.40 (GeV/ c ) 2 . The angular distribution has a forward peak with a differential cross-section d σ d ω = 4.1 ± 1.6 μ b / sr for 0.94 < cos θ p π + cm < 0.96 .

2 data tables
Table 1

No description provided.

Table 2

No description provided.