HEPData Search

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Measurement of the $\pi^-$ Form-factor

Dally, E.B. ; Drickey, Darrell James ; Hauptman, J.M. ; et al.

Phys.Rev.D 24 (1981) 1718-1735, 1981.

Inspire Record 172687 DOI 10.17182/hepdata.26467

An experiment to measure the electromagnetic form factor of the negative π meson has been carried out at Fermilab by elastically scattering 100-GeV/c pions from the atomic electrons in a liquid-hydrogen target. We find that the elastic differential scattering cross section is characterized by a root-mean-square pion charge radius of 0.56±0.04 fm. This paper described our experimental design, measurement resolutions, event triggering logic, event reconstruction, experimental corrections, and form-factor results.

3 data tables

Table 1

No description provided.

Table 2

Axis error includes +- 0.54/0.54 contribution (EVENT-FINDING CORRECTIONS).

Table 3

No description provided.

Direct Measurement of the pi- Form-Factor.

Dally, E.B. ; Drickey, Darrell James ; Hauptman, J.M. ; et al.

Phys.Rev.Lett. 39 (1977) 1176-1179, 1977.

Inspire Record 123313 DOI 10.17182/hepdata.20975

We have measured the electromagnetic form factor of the charged pion by direct scattering of 100-GeV/c π− from stationary electrons in a liquid-hydrogen target at Fermilab. The deviations from the pointlike pion-scattering cross section may be characterized by a root-mean-square charge radius for the pion of 〈rπ2〉12=0.56±0.04 F.

1 data table

Table 1

No description provided.

Study of pi- Meson Elastic Scattering by Protons at Small Angles

Apokin, V.D. ; Derevshchikov, A.A ; Matulenko, Yu.A. ; et al.

Yad.Fiz. 21 (1975) 1240-1246, 1975.

Inspire Record 103333 DOI 10.17182/hepdata.19099

None

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

IM(AMP) VIA OPTICAL THEOREM FROM TOTAL CROSS SECTIONS OF L. M. VASILYEV ET AL., PL 36B, 528 (1971).

Small-Angle pi- p Elastic Scattering Measurements

Apokin, V.D. ; Derevshchikov, A.A. ; Matulenko, Yu.A. ; et al.

Phys.Lett.B 56 (1975) 391-394, 1975.

Inspire Record 90800 DOI 10.17182/hepdata.27866

We have measured small angle elastic pion-proton scattering in 40 and 50 GeV c π − beams at Serpukhov. Analysis of the data in the Coulomb interference region yields a value for the ratio of the real to the imaginary part of the strong amplitude, ϱ (0)=−0.074 ± 0.033 at 40 GeV/ c and ϱ (0)=−0.006 ±0.026 at 50 GeV/ c

2 data tables

Table 1

STATISTICAL ERRORS ONLY.

Table 2

STATISTICAL ERRORS ONLY.

A measurement of elastic pion-proton scattering at 50 gev

Derevchekov, A.A. ; Golovin, N.I. ; Khodirev, Y.C. ; et al.

Phys.Lett.B 48 (1974) 367-370, 1974.

Inspire Record 95356 DOI 10.17182/hepdata.27998

We have measured elastic pion-proton scattering in a 50 GeV/ c π − beam at the 76 GeV proton synchrotron in Serpukhov. Data are presented for four-momenta transfer squared in the range 0.03 < t < 0.4 (GeV/ c ) 2 .

1 data table

Table 1

SLOPE IS 9.1, +0.2, -0.4 GEV**-2 (INCLUDING SYSTEMATIC ERRORS).

Deuteron Electromagnetic Form Factors for F-3-2 < q2 < F-6-2

Benaksas, D. ; Drickey, D. ; Frerejacque, D. ;

Phys.Rev. 148 (1966) 1327-1331, 1966.

Inspire Record 944953 DOI 10.17182/hepdata.26653

Two groups of measurements have been made on the elastic scattering of electrons by deuterium; in each case we observed the recoil deuteron instead of the scattered electron. In the first case the spectrometer was set at 45° so that magnetic scattering was unimportant (about 10%) and we deduced the electric form factors of the deuteron. In the second case deuterons were observed at 0°, allowing us to measure directly the magnetic form factor of the deuteron. Form factors of the neutron were deduced from these measurements for the transfer values q2=3, 4, and 5 (F−2). Preliminary results were given in a first paper. Here we also include a description of the experimental setup and discuss relativistic and exchange-current corrections.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

No description provided.

Elastic Electron-Deuteron Scattering

Grossetete, B. ; Drickey, D. ; Lehmann, P. ;

Phys.Rev. 141 (1966) 1425-1434, 1966.

Inspire Record 944959 DOI 10.17182/hepdata.26656

We present results on elastic electron-deuteron experiments performed at Orsay. The range of momentum transfers is 0.6 to 2 F−2. Two kinds of measurements have been taken detecting the scattered electron: one with a solid CD2 target, the other with a liquid target. The data are analyzed with the nonrelativistic theory, which gives slightly positive neutron form factors and a magnetic neutron form factor nearly equal to the magnetic proton form factor.

3 data tables

Table 1

No description provided.

Table 2

No description provided.

Table 3

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.