Kline, R.V
Single Differential Cross Section
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Electroproduction of Single Pions at Low Epsilon and a Measurement of the Pion Form-Factor Up to Q**2 = 10-GeV**2

Bebek, C.J. ; Brown, C.N. ; Holmes, Stephen D. ; et al.
Phys.Rev.D 17 (1978) 1693, 1978.
Inspire Record 120118 DOI 10.17182/hepdata.4472

We report measurements of the electroproduction of single charged pions from hydrogen and deuterium targets for values of ε in the range 0.35<ε<0.45. Data were taken with a hydrogen target at the (W, Q2) points (2.15 GeV, 1.2 GeV2), (2.65, 2.0), (2.65, 3.4), (2.65, 6.0), and (2.65, 10.0). Data were taken with a deuterium target at the (W, Q2) points (2.15, 1.2) and (2.65, 2.0). The transverse cross section obtained by using these data in conjunction with earlier data at high ε to separate the longitudinal and transverse components is used in conjunction with the new data and the t-channel Born term to determine the pion form factor and to re-evaluate previously reported measurements. In the range 0.15 GeV2<Q2<10.0 GeV2 the pion form factor can be described by the simple pole form [1+Q2(0.462±0.024)]−1.

46 data tables
Table 1

SEPARATED TRANSVERSE AND LONGITUDINAL VIRTUAL-PHOTON CROSS SECTIONS PREVIOUSLY PUBLISHED IN C. J. BEBEK ET AL., PRL 37, 1326 (1976).

Table 2

DATA POINT 1 (HYDROGEN TARGET).

Table 3

DATA POINT 1 (HYDROGEN TARGET).

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Scalar-Transverse Separation of Electroproduced K+ Lambda and K+ Sigma0 Final States

Bebek, C.J. ; Browman, A. ; Brown, C.N. ; et al.
Phys.Rev.D 15 (1977) 3082, 1977.
Inspire Record 4932 DOI 10.17182/hepdata.24615

We present evidence for a large scalar contribution to the cross section for the reaction ep→eK+Λ. No evidence for a scalar contribution is found for the reaction ep→eK+Σ0. This is reminiscent of the results for the π+n and π+Δ0 final states.

2 data tables
Table 1

AVERAGED OVER PHI. FOR LOW EPSILON, SOME DEUTERIUM DATA ARE INCLUDED. INCLUDING EARLIER MEASUREMENTS AT HIGH EPSILON.

Table 2

AVERAGED OVER PHI. INCLUDING EARLIER MEASUREMENTS AT HIGHER EPSILON.


Scalar Transverse Separation for Single pi+ Electroproduction

Bebek, C.J. ; Browman, A. ; Brown, C.N. ; et al.
Phys.Rev.Lett. 37 (1976) 1326, 1976.
Inspire Record 110318 DOI 10.17182/hepdata.21075

We report measurements of the exclusive electroproduction reaction e+p→e+π++n for pions produced near 0° in the virtual-photon-proton center-of-mass system with values of ε in the range 0.35<ε<0.45. Combination with data taken at ε near 1 allows us to separate the contributions from transversely polarized and scalar photons in the range 1.2 GeV2<Q2<3.3 GeV2.

3 data tables
Table 1

No description provided.

Table 2

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Table 3

No description provided.