\(\text{High-P}^2_\bot\) spin dependent measurements

  • A. D. Krisch
Conference paper


The reason for studying the violent collisions of protons is to obtain information about the inner structure of the proton. To study the inner structure of the proton and to see what its constituents look like, one must observe large values of P which is the canonically conjugate variable to the impact parameter.

Now recall that, when you study proton-proton elastic scattering with an unpolarized beam, you can only measure one quantity, the spin average differential cross section. However, if either the beam or the target is polarized then you can measure one-spin quantities such as A, the analyzing power, which is sometimes incorrectly called the polarization. If both the beam and the target are polarized then you can measure two-spin quantities such as Ann, the spin-spin correlation parameter. It is useful to now define the polarization:
$$P = \frac{N(\uparrow ) - N(\downarrow )}{N(\uparrow ) + N(\downarrow )}$$
This definition applies to both the beam polarization and the target polarization.


Pure Spin Spin Effect Unpolarized Beam Polarize Proton Target Polarize Proton Beam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag Berlin Heidelberg 1990

Authors and Affiliations

  • A. D. Krisch
    • 1
  1. 1.Randall Laboratory of PhysicsThe University of MichiganAnn ArborUSA

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