Elsevier

Nuclear Physics B

Volume 135, Issue 3, 10 April 1978, Pages 461-485
Nuclear Physics B

Studies of proton-proton collisions at the CERN ISR with an identified charged hadron of high transverse momentum at 90°: (I). On forward particles in high-PT reactions

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Abstract

In the course of an experiment to investigate the structure of final states from high-energy proton-proton collisions containing an identified charged hadron of high transverse momentum near 90° in the c.m.s., we have studied correlations between the high-PT trigger particle and forward charged particles. An azimuthal asymmetry is observed for the forward particles. A transverse momentum recoil against the trigger particle is seen, largest at large Feynman x and apparently saturating with increasing trigger momentum. We also observe a flatter PT spectrum for the associated forward particles at 90° in azimuth to the trigger than in normal events. The dependence of the correlations on the quantum numbers of the trigger particle is generally small in this region of phase space.

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    The experiment was supported by the United Kingdom Science Research Council, the Danish and Swedish Natural Science Research Councils, the Norwegian Research Council for Science and the Humanities, and L'Institut National de Physique Nucleaire et de Physique des Particules, France.

    Now at Scientific Control Systems Ltd, London, United Kingdom.

    ★★

    Now at the Central Research Institute for Physics, Hungarian Academy of Sciences, Budapest, hungary.

    ★★★

    On leave from LPNHE, University of Paris VI, Paris, France.

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