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Antiproton-proton elastic scattering from 1.51–2.90 GeV/ c

Parker, D.L. ; Oh, B.Y. ; Smith, G.A. ; et al.

Nucl.Phys.B 32 (1971) 29-44, 1971.

Inspire Record 1392679 DOI 10.17182/hepdata.814

In a bubble chamber experiment, we have measured p p elastic scattering at nine momenta in the range 1.51–2.90 GeV/ c . The extrapolation of the small angle region to t = 0 is discussed and compared with results of other experiments. The differential cross sections are fitted to an adaptation of the Frahn-Venter optical model and also compared to Regge-pole model predictions.

19 data tables

Table 1

'1'. '2'. '3'.

Table 2

'1'. '3'.

Table 3

'2'.

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The Spin Correlation Parameter and Analyzing Power in $n p$ Elastic Scattering at Intermediate-energies

Abegg, R. ; Ahmad, M. ; Bandyopadhyay, D. ; et al.

Phys.Rev.C 40 (1989) 2684-2696, 1989.

Inspire Record 281880 DOI 10.17182/hepdata.26220

In order to improve existing I=0 phase shift solutions, the spin correlation parameter ANN and the analyzing powers A0N and AN0 have been measured in n-p elastic scattering over an angular range of 50°–150° (c.m.) at three neutron energies (220, 325, and 425 MeV) to an absolute accuracy of ±0.03. The data have a profound effect on various phase parameters, particularly the P11, D23, and ε1 phase parameters which in some cases change by almost a degree. With the exception of the highest energy, the data support the predictions of the latest version of the Bonn potential. Also, the analyzing power data (A0N and AN0) measured at 477 MeV in a different experiment over a limited angular range [60°–80° (c.m.)] are reported here.

10 data tables

Table 1

The beam analysing power at incident kinetic energy 220 MeV. Additional systematic uncertainty of +- 0.015 and a scalar error of 3.5 PCT.

Table 2

The beam analysing power at incident kinetic energy 325 MeV. Additional systematic uncertainty of +- 0.018 and a scalar error of 3.1 PCT.

Table 3

The beam analysing power at incident kinetic energy 425 MeV. Additional systematic uncertainty of +- 0.022 and a scalar error of 3.3 PCT.

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EXPERIMENTAL DATA ON ELASTIC p p, n p, p d AND p gamma FORWARD SCATTERING AT INTERMEDIATE-ENERGIES

Dobrovolsky, A.V. ; Khanzadeev, A.V. ; Korolev, G.A. ; et al.

LENINGRAD-88-1454, 1988.

Inspire Record 270168 DOI 10.17182/hepdata.38078

None

26 data tables

Table 1

Table 2

Table 3

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Measurement, With a Free Neutron Beam, of Absolute Neutron - Proton Forward Elastic Scattering Differential Cross-section at Intermediate-energies

Terrien, Y. ; Lugol, J.C. ; Saudinos, J. ; et al.

Phys.Rev.Lett. 59 (1987) 1534-1536, 1987.

Inspire Record 247964 DOI 10.17182/hepdata.20103

The differential cross section in free n-p forward elastic scattering has been measured for incident neutron energies of 378, 481, 582, 683, 784, 884, and 1085 MeV and for momentum transfer 0.01<‖t‖<0.08 (GeV/c)2. The experiment used a recoil-detector ionization chamber which served at the same time as a gas target. Special care has been taken to obtain a precise absolute normalization.

7 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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Test of Charge Symmetry in Neutron - Proton Elastic Scattering at 477-{MeV}

Abegg, R. ; Bandyopadhyay, D. ; Birchall, J. ; et al.

Phys.Rev.Lett. 56 (1986) 2571, 1986.

Inspire Record 228239 DOI 10.17182/hepdata.20237

An experiment resulting in the first measurement of the isospin-mixing, charge-symmetry-violating component of the n−p interaction has been performed. The experiment determined the difference in the angles of the zero crossing of the neutron and proton analyzing powers An and Ap at 477 MeV. In terms of the laboratory scattering angle of the neutron, the measured difference is θ0n(An)−θ0n(Ap)=+0.13° ±0.06° (±0.03°), where the second error is a worst-case estimate of systematic error. The resulting difference in the analyzing powers at the zero-crossing angle is An−Ap=+0.0037 ±0.0017 (±0.0008).

1 data table

Table 1

No description provided.

Analyzing Powers in Free $N$ (Polarized) $P$ Forward Elastic Scattering at Energies From 630-{MeV} to 1000-{MeV}

Korolev, G.A. ; Khanzadeev, A.V. ; Petrov, G.E. ; et al.

Phys.Lett.B 165 (1985) 262-264, 1985.

Inspire Record 228528 DOI 10.17182/hepdata.30310

The analysing powers in free →n p forward elastic scattering have been measured for incident neutron energies of 633, 784, 834, 934 and 985 MeV, and for momentum transfer 0.01 < ‖ t ‖ < 0.10 ( GeV / c ) 2 . The experiment used a recoil detector ionisation chamber which served at the same time as a gas target, and scintillation counters to measure the asymmetry of the scattered neutrons.

5 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

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First Observation and Cross-section Measurement of $\nu_e e^- \to \nu_e e^-$

Allen, R.C. ; Bharadwaj, V. ; Brooks, G.A. ; et al.

Phys.Rev.Lett. 55 (1985) 2401, 1986.

Inspire Record 215874 DOI 10.17182/hepdata.20326

We report the first observation and cross-section measurement of νe+e−→νe+e−. Using neutrinos of energy less than 53 MeV, we observed 63±17 events consistent with ν+e−→ν+e−, of which 51±17 events are assigned to νe+e−→νe+e−. The resulting cross section, {[8.9±3.2(statistical) ±1.5(systematic)]×10−45 cm2/MeV} Eν, agrees with standard electroweak theory, rules out constructive interference between weak charged-current and neutral-current interactions, and begins to indicate the existence of interference between these two interactions.

1 data table

Table 1

No description provided.