Extraction of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>R</mi><mo>=</mo><mfrac><mrow><mrow><msub><mrow><mi>σ</mi></mrow><mrow><mi>L</mi></mrow></msub></mrow></mrow><mrow><mrow><msub><mrow><mi>σ</mi></mrow><mrow><mi>T</mi></mrow></msub></mrow></mrow></mfrac></math> from Deep Inelastic <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>e</mi><mo>−</mo><mi>p</mi></math> and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>e</mi><mo>−</mo><mi>d</mi></math> Cross Sections

E. M. Riordan; A. Bodek; M. Breidenbach; D. L. Dubin; J. E. Elias; J. I. Friedman; H. W. Kendall; J. S. Poucher; M. R. Sogard; D. H. Coward

doi:10.1103/PhysRevLett.33.561

Extraction of $R = \frac{σ_{L}}{σ_{T}}$ from Deep Inelastic $e - p$ and $e - d$ Cross Sections

E. M. Riordan, A. Bodek, M. Breidenbach, D. L. Dubin, J. E. Elias, J. I. Friedman, H. W. Kendall, J. S. Poucher, M. R. Sogard, and D. H. Coward

Phys. Rev. Lett. 33, 561 – Published 26 August 1974

Abstract

The quantity $R = \frac{σ_{L}}{σ_{T}}$ is extracted for the proton, deuteron, and neutron from deep inelastic $e - p$ and $e - d$ scattering cross sections measured in recent experiments at Stanford Linear Accelerator Center. For $ω <~ 5$ the kinematic behavior of $ν R_{p}$ is consistent with scaling, indicative of spin-½ constituents in a parton model of the proton. We also find that within large statistical errors, $R_{d}$ and $R_{n}$ are consistent with being equal to $R_{p}$ .

Received 16 May 1974

DOI:https://doi.org/10.1103/PhysRevLett.33.561

Authors & Affiliations

E. M. Riordan, A. Bodek, M. Breidenbach^*, D. L. Dubin, J. E. Elias^†, J. I. Friedman, H. W. Kendall, J. S. Poucher, and M. R. Sogard^‡

Physics Department and Laboratory for Nuclear Science, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139

D. H. Coward

Stanford Linear Accelerator Center, Stanford University, Stanford, California 94305

^*Present address: Stanford Linear Accelerator Center, Stanford University, Stanford, Calif. 94305.
^†Present address: National Accelerator Laboratory, Batavia, Ill. 60510.
^‡Present address: Laboratory of Nuclear Studies, Cornell University, Ithaca, N.Y. 14850.