Observation of Coulomb effects in production of <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math>, <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>p</mi><mrow><msup><mrow><mi>π</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math>, and <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>+</mo></mrow></msup></mrow><mrow><msup><mrow><mi>K</mi></mrow><mrow><mo>−</mo></mrow></msup></mrow></math> pairs in <math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mi>pp</mi></math> collisions at 27.5 GeV/c

L. R. Wiencke; M. D. Church; E. E. Gottschalk; R. A. Hylton; B. C. Knapp; W. Sippach; B. J. Stern; E. P. Hartouni; D. A. Jensen; B. Klima; M. N. Kreisler; M. S. Z. Rabin; J. B. Strait; J. Uribe; D. C. Christian; G. Gutierrez; S. D. Holmes; A. Wehmann; C. Avilez; M. Forbush; F. R. Huson; J. T. White

doi:10.1103/PhysRevD.46.3708

Observation of Coulomb effects in production of $π^{+} π^{-}$ , $p π^{-}$ , and $K^{+} K^{-}$ pairs in $pp$ collisions at 27.5 GeV/c

L. R. Wiencke, M. D. Church, E. E. Gottschalk, R. A. Hylton, B. C. Knapp, W. Sippach, B. J. Stern, E. P. Hartouni, D. A. Jensen, B. Klima, M. N. Kreisler, M. S. Z. Rabin, J. B. Strait, J. Uribe, D. C. Christian, G. Gutierrez, S. D. Holmes, A. Wehmann, C. Avilez, M. Forbush, F. R. Huson, and J. T. White

Phys. Rev. D 46, 3708 – Published 1 November 1992

Abstract

In a study of collisions of 27.5 GeV/c protons in liquid hydrogen we have observed enhanced production of oppositely charged hadron pairs when the relative velocity of the two hadrons in the pair rest frame approaches $α c$ . The scale and velocity dependence of the enhancement agree well with the effect of the attractive Coulomb interaction as described by the Gamow factor.