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Highp T hadrons as leading particles in jets produced at the ISR |
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| Authors: | A Breakstone C D Buchanan R Campanini H B Crawley G M Dallavalle M M Deninno K Doroba D Drijard F Fabbri A Firestone H G Fischer H Frehse W Geist G Giacomelli R Gokieli M Gorbics P Hanke M Heiden W Herr P G Innocenti E E Kluge J W Lamsa T Lohse W T Meyer G Mornacchi T Nakada M Panter A Putzer K Rauschnabel F Rimondi R Sosnowski J Spahn M Szczekowski O Ullaland D Wegener |
| Institution: | 1. Ames Laboratory and Physics Department, Iowa State University, 50010, Ames, IA, USA 2. CERN, European Organization for Nuclear Research, CH-1211, Geneva 23, Switzerland 3. Instituto di Fisica dell'Università and INFN, I-40126, Bologna, Italy 4. University and Institute for Nuclear Studies, PL-00-681, Warsaw, Poland 6. Institut für Hochenergiephysik der Universit?t, D-6900, Heidelberg, Germany 7. Institut für Physik der Universit?t, D-4600, Dortmund, Germany |
| Abstract: | The density of charged particles near a single highp T trigger particle in proton-proton collisions has been studied with the SFM detector at the CERN-ISR. It is shown that:—the secondaries cluster in a jet-like manner about the trigger particle; —the momentum distributions in this trigger jet can be unambiguously separated from the spectator background distributions;—the momentum distributions in this trigger jet can be unambiguously separated from the spectator background distributions;—the momentum component transverse to the jet direction is exponentially damped;—the width of the transverse distributions increases with the momentum component along the jet;—the fractional longitudinal momentum density depends strongly on the trigger transverse momentum and scales with \(x_T = {{2p_T } \mathord{\left/ {\vphantom {{2p_T } {\sqrt s }}} \right. \kern-0em} {\sqrt s }}\) . All these findings support the hard constituent scattering origin of highp T hadrons. |
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