HEPData Search

Reverse order

Showing 10 of 22 results

Elastic pp scattering in the region of the coulomb interference at momenta 1.1 - 1.7 GeV/c

Vorob'ev, A.A. ; Denisov, A.S. ; Zalite, Yu.K. ; et al.

JETP Lett. 17 (1973) 108-110, 1973.

Inspire Record 1393129 DOI 10.17182/hepdata.39943

None

1 data table

Table 1

REAL/IMAG FOR FORWARD AMPLITUDE DEDUCED FROM D(SIG)/DEKIN(P=3) IN THE COULOMB-NUCLEAR INTERFERENCE REGION.

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'.

More…

Measurements of the electric and magnetic form-factors of the neutron from Q2 = 1.75-GeV/c2 to 4-GeV/c**2

Lung, A. ; Stuart, L.M. ; Bosted, Peter E. ; et al.

Phys.Rev.Lett. 70 (1993) 718-721, 1993.

Inspire Record 342252 DOI 10.17182/hepdata.19739

Quasielastic e-d cross sections have been measured at forward and backward angles. Rosenbluth separations were done to obtain RL and RT at Q2=1.75, 2.50, 3.25, and 4.00 (GeV/c)2. The neutron form factors GEn and GMn have been extracted using a nonrelativistic model. The sensitivity to deuteron wave function, relativistic corrections, and models of the inelastic background are reported. The results for GMn are consistent with the dipole form, while GEn is consistent with zero. Comparisons are made to theoretical models based on vector meson dominance, perturbative QCD, and QCD sum rules, as well as constituent quarks.

2 data tables

Table 1

Magnetic form factors.

Table 2

Electric form factors.

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.

More…

Charge Symmetry Breaking in $n p$ Elastic Scattering at 477-{MeV}

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

Phys.Rev.D 39 (1989) 2464, 1989.

Inspire Record 267187 DOI 10.17182/hepdata.23224

The effect of isospin-violating, charge-symmetry-breaking (CSB) terms in the np interaction has been observed at TRIUMF by measuring the difference in the zero-crossing angles of the neutron and proton analyzing powers, An and Ap, at a neutron energy of 477 MeV. The scattering asymmetries were measured with a neutron beam incident on a polarizable proton target. To reduce systematic errors, interleaved measurements of An and Ap were made using the same beam and target (apart from their respective polarization states). Neutrons and protons were detected in coincidence in the center-of-mass angle range from 59°–80°. The difference in zero-crossing angles was 0.340°±0.162° (±0.058°), which yields ΔA≡An-Ap=0.0047±0.0022 (±0.0008) using dA/dθc.m.=−0.01382 deg−1. The second errors represent systematic effects. This result is in good agreement with recent theoretical calculations which include CSB effects due to the np mass difference in π, ρ, and 2π exchange, electromagnetic coupling of the neutron anomalous magnetic moment to the proton current, ρ-ω-meson mixing, and short- and medium-range effects of the up- and down-quark mass difference.

1 data table

Table 1

No description provided.

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.

More…

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.

More…

SMALL ANGLE P P SCATTERING AT ENERGIES FROM 650-MEV TO 1000-MEV

Dobrovolsky, A.v. ; Khanzadeev, A.v. ; Korolev, G.a. ; et al.

Nucl.Phys.B 214 (1983) 1-20, 1983.

Inspire Record 192453 DOI 10.17182/hepdata.33966

Absolute differential cross sections for pp elastic scattering have been measured at kinetic energies of 648, 746, 795, 843, 892, 942 and 992 MeV and for momentum transfer 0.006 < z . sfnctz . sfnc <0.040 (GeV/ c ) 2 . Both scattered and recoil protons were detected in coincidence. The slope parameters of the diffraction cone and the contribution of the spin-spin amplitudes to forward elastic pp scattering were determined.

7 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.