Max results
Sort by Reverse order

Showing 10 of 10000 results

Date

Proton-Proton Scattering at 1.48 BeV

Eisner, A.M. ; Hart, E.L. ; Louttit, R.I. ; et al.
Phys.Rev. 138 (1965) B670-B677, 1965.
Inspire Record 944962 DOI 10.17182/hepdata.461

A sample of 2657 proton-proton scattering events at 1.48 BeV has been analyzed. The elastic cross section is 19.86 mb, and the elastic scattering is consistent with a simple opaque-disk optical model with R=0.91 F and 1−a=0.864. The dominant feature of the inelastic scattering is the production of the (3/2, 3/2) isobar. The reaction p+p→p+n+π+ is interpreted satisfactorily in terms of the one-pion-exchange model.

2 data tables
Table 1

No description provided.

Table 2

No description provided.


Measurement of the Recoil Proton Polarization in Elastic $\pi^-p$ Scattering at $T_\pi=410$ and 492 MeV

Bareyre, P. ; Bricman, C. ; Longo, M.J. ; et al.
Phys.Rev.Lett. 14 (1965) 878-880, 1965.
Inspire Record 945162 DOI 10.17182/hepdata.21824

None

2 data tables
Table 1

No description provided.

Table 2

No description provided.


PROTON FORM-FACTORS FROM PROTON OBSERVATION

Frerejacque, Daniel ; Benaksas, David ; Drickey, Darrell James ;
Phys.Rev. 141 (1966) 1308-1312, 1966.
Inspire Record 48595 DOI 10.17182/hepdata.26652

A determination of the electric and magnetic form factors of the proton has been made by studying the elastic scattering of electrons from a polyethylene target by observation of the recoiling proton at 0° and 30° for values of q2 between 1 and 1.8 F−2. From these measurements we have deduced the charge radius Rc and the magnetic radius Rm of the proton and find equality within the experimental errors (Rc=0.800±0.025 F; Rm=0.810±0.029 F).

8 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Further Evidence for a Possible I=52 N* Resonance at 1580 MeV

Alexander, G. ; Benary, O. ; Reuter, B. ; et al.
Phys.Rev.Lett. 15 (1965) 207-210, 1965.
Inspire Record 944924 DOI 10.17182/hepdata.21831

None

1 data table
Table 1

Axis error includes +- 0.0/0.0 contribution (?////Not given).


Polarization of the Recoil Proton from pi0 Photoproduction in Hydrogen

Maloy, J.O. ; Peterson, V.Z. ; Salandin, G.A. ; et al.
Phys.Rev. 139 (1965) B733-B746, 1965.
Inspire Record 944960 DOI 10.17182/hepdata.26657

The polarization of the recoil proton in neutral single-pion photoproduction from hydrogen, γ+p→p+π0, has been measured for pion center-of-mass angles near 90° at 7 photon energies from 450 to 900 MeV. The polarization rises to a maximum of 0.58 near 600 MeV and is still 0.42 at 900 MeV. The sign of the polarization is negative in the sense of k×q, where k is the photon momentum and q is the pion momentum. The measured values are given as functions of laboratory photon energy and c.m. pion angle as follows: 450 MeV, 109°, -0.16±0.14; 525 MeV, 84°, -0.36±0.19; 585 MeV, 86°, -0.58±0.15; 660 MeV, 77°, -0.51±0.17; 755 MeV, 76°, -0.55±0.15; 810 MeV, 89°, -0.45±0.17; 895 MeV, 90°, -0.42±0.16. The recoil protons were momentum-analyzed with a magnetic spectrometer. Nuclear emulsion was used as scatterer and detector. The emulsion technique is discussed in detail. The number of individual scatterings in emulsion used for each measurement varied between 750 and 1000.

1 data table
Table 1

No description provided.


Positron-Proton Scattering

Browman, A. ; Liu, F. ; Schaerf, C. ;
Phys.Rev. 139 (1965) B1079-B1085, 1965.
Inspire Record 944961 DOI 10.17182/hepdata.26686

The importance of two-photon exchange in elastic electron-proton scattering was investigated by measuring the ratio of positron-proton to electron-proton scattering. Four-momentum transfers as large as 0.756 (BeV/c)2 (19.5 F−2) were used. The data indicate that two-photon effects are (4.0±1.5)% larger than those predicted by the radiative corrections at the highest momentum transfers attained in these experiments. The two-photon corrections predicted using a static charge distribution fit the data well at lower momentum transfers and forward angles, but appear to be small at higher momentum transfers and backward angles.

10 data tables
Table 1

Data recalculated from the data of Yount and Pine.

Table 2

Data recalculated from the data of Yount and Pine. RUN_1 and RUN_2 of the Yount and Pine experiment were separated by large time interval.

Table 3

Data recalculated from the data of Yount and Pine.

More…

Elastic electron - proton scattering at momentum transfers up t 245-F**-2

Albrecht, W ; Behrend, H.J. ; Brasse, F.W. ; et al.
Phys.Rev.Lett. 17 (1966) 1192, 1966.
Inspire Record 48841 DOI 10.17182/hepdata.3392

None

17 data tables
Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

More…

Proton form factors from elastic electron-proton scattering

Janssens, T. ; Hofstadter, R. ; Hughes, E.B. ; et al.
Phys.Rev. 142 (1966) 922-931, 1966.
Inspire Record 49127 DOI 10.17182/hepdata.26698

Absolute measurements of the elastic electron-proton cross section have been made with a precision of about 4% for values of the square of the four-momentum transfer, q2, in the range 6.0 to 30.0 F−2 and for electron scattering angles in the range 45° to 145°. To within the experimental errors, it is found that the charge and magnetic form factors of the proton have a common dependence on q2 when normalized to unity at q2=0, and that an accurate representation of the behavior of the form factor and that of the cross sections themselves can be given in terms of a three-pole approximation to the dispersion theory of nucleon form factors.

27 data tables
Table 1

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

Table 2

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

Table 3

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

More…

Proton Compton Scattering Measurement From 450 to 1350 MeV Near 90-degrees in the Center-of-Mass System

Rust, D.R. ; Eisenhandler, E. ; Mostek, P.J. ; et al.
Phys.Rev.Lett. 15 (1965) 938-941, 1965.
Inspire Record 944922 DOI 10.17182/hepdata.21794

None

1 data table
Table 1

No description provided.


eta Production near Threshold

Jones, W.G. ; Binnie, D.M. ; Duane, A. ; et al.
Phys.Lett. 23 (1966) 597, 1966.
Inspire Record 50962 DOI 10.17182/hepdata.29781

A study of π − + p →η + n near threshold shows that the cross section rises linearly with η momentum and that Λ η < 0.9 MeV c 2 (95% confidence limit).

1 data table
Table 1

Errors are statistical only.