Jet-like properties of multiparticle systems produced in K+p interactions at 70 GeV/c

doi:10.1016/0550-3213(81)90427-2

Nuclear Physics B

Volume 192, Issue 2, 14 December 1981, Pages 289-314

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Abstract

We present results on the jet-like properties of multiparticle systems produced in K⁺p interactions at 70 GeV/c. The data analysed in terms of several variables commonly used to study the jet structure of an event. An extensive comparison is made with jets found in electron-positron annihilations and in deep inelastic νN interactions at comparable energy. Many similarities are found between low-p_T jets in this experiment and jets observed in leptonic interactions. Our data are very well reproduced by the Field-Feynman quark fragmentation parametrisation but equally well by a longitudinal phase space model, suggesting that these similarities do not prove or disprove the universal character of the jet fragmentation.

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Physics with hadron and photon beams at the SPS
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This report attempts to cover the physics results obtained in the last 25 years by some 70 SPS experiments. A variety of beams, pion, kaon, proton, antiproton, hyperon and photon were used in these experiments, and, in one case (UA6), the p and $\bar{p}$ beams stored in the SPS Collider were made to hit an internal gas jet target. The panoply of detection techniques employed was also very large, from bubble chambers to silicon microdetectors, and the physics issues addressed ranged from hard to ultrasoft processes. The available space however, will only allow to touch briefly a few amongst the many interesting results which have been published since 1979.
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An analysis of event-shape structure in momentum space is presented in non-diffractive proton-proton interactions at $s =26 GeV$ . The data have been compared with those obtained in other low-p_T hadronic collisions and also with those from e⁺e⁻ annihilations. The jet-like behaviour becomes more pronounced at higher CM energies in the low-p_T hadron data. There is, however, no evidence of three-jet-like events in the present data as observed in e⁺e⁻ annihilations.
Comparison of planar features of K-p interactions with e+e- annihilations and deep inelastic μp scattering
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The planar features of hadronic final states in K⁻p interactions at 4.5, 5.6 and 14.3 GeV c.m. energy are compared with data from e⁺e⁻ annihilation and deep inelastic μp scattering. A strong energy variation of the distributions (1/σ)dσ/dp_t², 〈p_t²〉_in and Σp²_{t in} is observed over this energy range. Striking agreement is found between the K⁻p data at 14.3 c.m. energy and the leptonic data at similar hadronic c.m. energies. The behaviour of these distributions from K⁻p data is not well described by the simple quark fragmentation model, but shows deviations similar to those attributed to hard gluon effects in leptonic interactions.
Event shapes for hadronic final state: Experimental review
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Soft nultihrdron dvnhmics
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¹: Chercheur ISSN, Belgium.

²: Navorser IIKW, Belgium.

³: Bevoegdverklaard Navorser NFWO; also at Universitaire Instelling Antwerpen.

⁴: Visitor from the University of Tel-Aviv.

⁵: On leave of absence from Genova University, Genova, Italy.

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Nuclear Physics B

Abstract

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Cited by (16)

Physics with hadron and photon beams at the SPS

Bubble chambers in high energy hadron collisions (and vice versa)

Event shape in momentum space of proton-proton interactions at 360 GeV/c and comparison to e<sup>+</sup>e<sup>-</sup> data

Comparison of planar features of K<sup>-</sup>p interactions with e<sup>+</sup>e<sup>-</sup> annihilations and deep inelastic μp scattering

Event shapes for hadronic final state: Experimental review

Soft nultihrdron dvnhmics