THE CHOU-YANG MODEL AND π−p ELASTIC SCATTERING

The prediction that the use of the Borkowski form factor for proton in the Chou-Yang model for π−p elastic scattering at 200 GeV/c yields multiple dip structure in the region −5 ≲ −t ≲ 8 (GeV/c) 2 is shown to be incorrect. A parameterization of the proton form factor obtained by including the new experimental data for large −t when used in conjunction with pion form factor also does not produce the observed dip near −t = 4 (GeV/c) 2. Three possible approaches for a solution of the problem are briefly discussed.

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THE CHOU-YANG MODEL AND ELASTIC πp SCATTERING AT HIGH ENERGIES

International Journal of Modern Physics A ◽

10.1142/s0217751x87000971 ◽

1987 ◽

Vol 02 (06) ◽

pp. 1871-1886

Author(s):

MUJAHID KAMRAN ◽

I.E. QURESHI

Keyword(s):

Form Factor ◽

Form Factors ◽

Proton Form Factor ◽

Electromagnetic Form Factors ◽

Matter Distribution ◽

High Energies ◽

Proton Form ◽

200 Gev ◽

Elastic Data

By considering 14 different pion and proton form-factor combinations it is shown that the Chou-Yang model is not successful in describing πp elastic data at 200 GeV/c. It is further shown that a modified version in which the proton matter distribution is different from its electromagnetic form factors is able to describe the data well. Aspects of amplitude structure are also discussed.

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GENERALIZED CHOU-YANG MODEL AND MESON-PROTON ELASTIC SCATTERING AT HIGH ENERGIES

International Journal of Modern Physics A ◽

10.1142/s0217751x89000698 ◽

1989 ◽

Vol 04 (07) ◽

pp. 1747-1754 ◽

Cited By ~ 1

Author(s):

MOHAMMAD SALEEM ◽

FAZAL-E ALEEM ◽

HARIS RASHID

Keyword(s):

Experimental Data ◽

Form Factor ◽

Elastic Scattering ◽

Multiple Scattering ◽

Scattering Theory ◽

Anisotropic Scattering ◽

Proton Form Factor ◽

Recent Experimental Data ◽

High Energies ◽

Proton Elastic Scattering

The various characteristics of meson-proton elastic scattering at high energies are explained by using the generalized Chou-Yang model which takes into consideration the anisotropic scattering of objects constituting pions(kaons) and protons. A new parametrization of the proton form factor consistent with the recent experimental data is proposed. It is then shown that all the data for meson-proton elastic scattering at 200 and 250 GeV/c are in agreement with theoretical computations. The physical picture of generalized Chou-Yang model which is based on multiple scattering theory is given in detail.

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