Berger, B.E.
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Anti-proton-proton elastic scattering at 3.55 gev/c

Baker, W.F. ; Carlson, P.J. ; Chabaud, V. ; et al.
Nucl.Phys.B 12 (1969) 5-8, 1969.
Inspire Record 56106 DOI 10.17182/hepdata.35577

Antiproton-proton elastic scattering has been measured at 3.55 GeV/ c in the c.m. angular range from 20° to 77° and from 109° to 160°. Forward elastic scattering shows a structure near t = −0.5 (GeV/ c ) 2 . In the backward region two events are observed.

1 data table

Electromagnetic form factors of the proton between 15 and 50 fm-2

Berger, Christoph ; Gersing, E. ; Knop, G. ; et al.
Phys.Lett.B 28 (1968) 6890258X 276-278, 1968.
Inspire Record 56842 DOI 10.17182/hepdata.29174

The external beam of the 2.5 GeV-electron-synchrotron has been used to measre elastic electron proton scattering at four-momentum-transfers between 15 and 50 fm−2. By combining these results with measurements at small angles at DESY, we have obtained the electric and magnetic form factors separately. Their ratio shows a deviation from the scaling law.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Electromagnetic form-factors of the proton at squared four momentum transfers between 10-fm**-2 and 50 fm**-2

Berger, C ; Burkert, V. ; Knop, G. ; et al.
Phys.Lett.B 35 (1971) 87-89, 1971.
Inspire Record 69362 DOI 10.17182/hepdata.28478

Electron-proton elastic scattering cross sections have been measured to determine the proton electromagnetic form factors at squared four-momentum transfers q 2 between 10 and 50 fm −2 . At these values of q 2 we measured angular distributions between 25° and 110° and in addition at 25° and 35° cross sections for q 2 from 2 to 20 fm −2 using the external electron beam of the Bonn 2.5 GeV electron synchrotron. Our results confirm deviations from the scaling law.

15 data tables
Table 1

Axis error includes +- 2/2 contribution (NORMALIZATION ERROR).

Table 2

Axis error includes +- 2/2 contribution (NORMALIZATION ERROR).

Table 3

Axis error includes +- 2/2 contribution (NORMALIZATION ERROR).

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Measurements of k- p ---> anti-k0 n charge-exchange cross-sections at 25 and 35 gev/c

Belousov, V.I. ; Bolotov, B.N. ; Devishev, M.I. ; et al.
Phys.Lett.B 43 (1973) 76-78, 1973.
Inspire Record 84940 DOI 10.17182/hepdata.28127

Results are presented on the reaction K − p → K̄ o n for momenta above 20 GeV/ c . Events were identified by precise measurement of the opening angle in the decay K o → π + π − without using a magnetic field. The cross-section is described by a power energy dependence.

1 data table
Table 1

No description provided.


Neutron-Proton Differential-Cross-Section Measurements at 50 MeV

Montgomery, T.C. ; Brady, F.P. ; Bonner, B.E. ; et al.
Phys.Rev.Lett. 31 (1973) 640-643, 1973.
Inspire Record 945159 DOI 10.17182/hepdata.21337

The neutron-proton differential cross section at 50.0 MeV has been measured to a precision of ≃ 2% for backward-hemisphere c.m. angles and ≃ 3% for forward angles, both relative. The present data are not in good agreement with the previous n−p measurements near this energy. A preliminary phase-shift analysis using the present data produces more satisfactory results, particularly for the P11 phase shift.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of Neutron-Deuteron Polarization at 35 MeV

Zamudio-Cristi, J. ; Bonner, B.E. ; Brady, F.P. ; et al.
Phys.Rev.Lett. 31 (1973) 1009-1012, 1973.
Inspire Record 945160 DOI 10.17182/hepdata.21394

The neutron polarization asymmetry in neutron-deuteron scattering has been measured from 44.5° to 160° (c.m.) neutron angle. The results display quantitatively the same structure as proton-deuteron polarization data, but discrepancies appear for angles corresponding to those near the minimum of the differential cross section. In this region the polarization is considerably more negative than in the proton-deuteron case, and both are more negative than current theoretical predictions.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Inclusive photoproduction of $\pi^0$ mesons at 6 GeV

Berger, Christoph ; Dick, G. ; Erlewein, W. ; et al.
Phys.Lett.B 47 (1973) 377-380, 1973.
Inspire Record 95414 DOI 10.17182/hepdata.45246

An experiment has been performed to study the inclusive photoproduction of π 0 mesons. Photoproduced π 0 's were detected in a hodoscope consisting of 14 lead glass Cerenkov counters. To obtain the cross sections at a photon energy of 6 GeV we used the photon-difference method. Data are presented in terms of the Feynman variable x = q ‖ ∗ (√s/2) and the trnasverse momentum q⊥. We have measured four q ⊥ distributions at x = 0.2, 0.4, 0.6 and 0.8. The results dhow that the π 0 rate at small values of q ⊥ is smaller than the π± rate. The data can be fitted smoothly by a form A exp (− Bq ⊥ 2 ) with a value about 3.5 GeV −2 for the slope parameter B .

4 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Evidence for Unnatural Spin - Parity States of (K pi pi)0 in the Charge Exchange Reaction K- p --> (anti-K0 pi+ pi-) n

The Aachen-Berlin-CERN-London-Vienna & Athens-Democritos-Liverpool-Vienna collaborations Otter, G. ; Rudolph, G. ; Schmitz, P. ; et al.
Nucl.Phys.B 84 (1975) 333-341, 1975.
Inspire Record 90804 DOI 10.17182/hepdata.32131

A partial-wave analysis of the (K ππ ) 0 system produced in the charge exchange reaction K − p →( K 0 π + π − ) n has been made in the mass range 1.04 ⩽ M (K ππ ) < 1.56 GeV c data at 8, 10 and 16 GeV/ c . It was found that in about 2 3 of the cases, the (K ππ ) 0 system is produced in states of unnatural spin-parity, namely J P = 0 − and 1 + ; the rest is in the natural spin-parity state J P = 2 + state is consistent with being all K ∗ (1420). The unnatural spin-parity states are produced mostly (∼ 80% of the events) by natural parity exchange. The facts that unnatural spin-parity states are produced in this non-diffractive channel, with J P = 1 + dominant, and that the exchange responsible for their production is mostly of natural parity, are similar to what was found for the charged (K ππ ) − system in the diffractive reaction K − p→(K ππ ) − p. However, the absolute value and the energy dependence of the cross sections are very different in the two cases.

2 data tables
Table 1

CORRECTED FOR UNSEEN AK0 DECAY MODES.

Table 2

ACTUALLY CROSS SECTIONS FOR PRODUCTION IN MASS REGION 1.04 < M(AK0 PI+ PI-) < 1.56 GEV IN THE STATES JP = 1+, 2+ AND 0- RESPECTIVELY.


Alpha-Proton Elastic Scattering in the Backward Hemisphere

Berger, J. ; Bizard, G. ; Duflo, J. ; et al.
Phys.Lett.B 63 (1976) 111-114, 1976.
Inspire Record 101104 DOI 10.17182/hepdata.27659

Incident alphas on protons were used to measure the elastic cross section in the backward hemisphere at 3.20, 4.00, 5.08 and 6.00 GeV/ c . The level and shape of the angular distributions are strongly dependent on energy. A backward peak shows up at 4.00 GeV/ c and become much steeper when the energy increases.

4 data tables
Table 1

X ERROR H = 0.50 G/CM**2. X ERROR D(THETA) = 0.8800 DEG.

Table 2

X ERROR H = 0.50 G/CM**2. X ERROR D(THETA) = 0.4400 DEG.

Table 3

X ERROR H = 0.50 G/CM**2. X ERROR D(THETA) = 0.8800 DEG.

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Precision Measurement of n p Charge Exchange Cross-Section at 647-MeV

Evans, M.L. ; Glass, G. ; Hiebert, J.C. ; et al.
Phys.Rev.Lett. 36 (1976) 497-500, 1976.
Inspire Record 112959 DOI 10.17182/hepdata.21088

The differential cross section for n−p elastic scattering in the angular region 145°<θc.m.<180° has been measured with high statistical accuracy using the monoenergetic neutron beam at Clinton P. Anderson Meson Physics Facility. The results differ significantly from previous Dubna and Princeton-Pennsylvania Accelerator results but agree reasonably well with recent Saclay data except at extreme backward angles.

1 data table
Table 1

No description provided.