Identified particles in quark and gluon jets

P Abreu ,P.s.l Booth ,A Hallgren ,C Weiser ,Rui Henriques ,V Lefébure ,C Defoix ,E Karvelas ,D Souza-Santos ,J E Augustin ,A Tilquin ,A M Segar ,J J Hernández ,C Walck ,G C Zucchelli ,A Seitz ,G W Van Apeldoorn ,M Blume ,W J Murray ,T G M Malmgren ,O Bärring ,J E Garcia ,C Martínez-Rivero ,S Tzamarias ,L Lyons ,J Marco ,E Fokitis ,L Gerdyukov ,M Górski ,B Stugu ,F Bianchi ,J Guy ,F Pierre ,Ch De La Vaissière ,M J Bates ,R.c.a Brown ,S Almehed ,F Richard ,P Kokkinias ,P Brückman ,T A Filippas ,Y Sedykh ,W S C Williams ,D Vilanova ,L Roos ,C Bricman ,B Loerstad ,I Ripp ,D Bertini ,J Wickens ,K Doroba ,F Barão ,J P Laugier ,M Besançon ,A Normand ,J Van Eldik ,P Delpierre ,R Nicolaidou ,C Garćıa ,C De Saint Jean ,K Hultqvist ,Κ Παπαγεωργίου ,I Roncagliolo ,C Vander Velde ,D Liko ,Yu Gouz ,B Tomé ,W Da Silva ,L Serbelloni ,R C Shellard ,C Kreuter ,H Schneider ,Th D Papadopoulou ,E Cortina ,A Tsirou ,A Klovning ,K H Becks ,V Malychev ,H Wahlen ,V Vrba ,J Timmermans ,F Simonetto ,M Paganoni 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,M Mazzucato ,E Higón ,A Tomaradze ,P Zalewski ,S Cabrera ,Yu Belokopytov ,S Ragazzi ,I Stavitski ,D Treille ,L Mundim ,P J Holt ,L S Vertogradov ,P Paganini ,T Lesiak ,H Pałka ,R Sosnowski ,K F Read ,P Herquet ,P Jarry ,T B Skaali ,O Yushchenko ,R Mc Kay ,A Stocchi ,G Sciolla ,V Uvarov ,P Van Dam ,T Adye ,T Buran ,T Brenke ,A C Benvenuti ,K Rybicki ,L Pape ,A Augustinus ,M Feindt ,M Margoni ,Y Sacquin ,P Beillière ,A Trombini ,C Petridou ,A Sadovsky ,M Dris ,S Katsanevas ,A Petrolini ,J Chudoba ,K Österberg ,F Ledroit ,P Poropat ,V Ruhlmann-Kleider ,B Bouquet ,E Katsoufis ,J Rameš ,R Frühwirth ,F Formenti ,Ph Gavillet ,G Wilkinson ,M Petrovyck ,M Houlden ,R Brenner ,V Lepeltier ,V Lapin ,M Gandelman ,G Damgaard ,R Silvestre ,B Franek ,P D Dauncey ,L Di Ciaccio ,R Pain ,C Mariotti ,P Seager ,J C Marin ,L Peralta ,H Foeth ,D Gelé ,D Y Bardin ,J M Lopez ,F Matorras ,A N Sisakian ,P Langefeld ,A Galloni ,F Verbeure ,O Tchikilev ,M Davenport ,N Redaelli ,K Grzelak ,G Barbiellini ,W 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Karafasoulis ,E Dahl‐Jensen ,A Ouraou ,J D Durand ,P Frenkiel ,M Wielers ,F Djama ,M A Bizouard ,J A Barrio ,Martin Karlsson ,G Polok ,G J Barker ,P Roudeau ,R Moeller ,Yu.a Khokhlov ,J Mašík ,T Włodek ,F J Harris ,A Onofre ,G Rinaudo ,D Holthuizen ,Erik Johansson ,P Renton ,M Esṕırito Santo ,B Åsman ,P Niss ,E Boudinov ,M Dracos ,P Billoir ,I Ajinenko ,D Z Toet ,A Lipniacka ,H Dijkstra ,M Mulders ,T Rovelli ,J R Mahon ,G Myatt ,C Kourkoumelis ,M R Monge ,P Chliapnikov ,E Vlasov ,L Bugge ,P Sponholz ,P Gunnarsson ,E I Rosenberg ,F Naraghi ,G D Alekseev ,G Lenzen ,J Salt ,E Spiriti ,B Golob ,O Klapp ,F Parodi ,D Wicke ,L Lanceri ,R Contri ,R Lauhakangas ,P Checchia ,M Winter ,P P Allport ,B Erzen ,F Cao ,P Branchini ,Α Μάρκου ,M Szeptycka ,W D Apel ,G Valenti ,P Buschmann ,M Dam ,P Chochula ,H T Phillips ,A Baroncelli ,J Libby ,W Krupinski ,A Di Diodato ,Z Hajduk ,K Stevenson ,C Bourdarios ,F Carena ,I Lippi ,C K Legan ,J Richardson ,T Camporesi ,D Žontar ,I Kronkvist ,C Troncon ,P Ronchese ,M Schimmelpfennig ,A Ferrer ,M Begalli ,Miroslav Novák ,D Zavrtanik ,M Calvi ,E Migliore ,V Cindro ,M Witek ,W De Boer ,T Burgsmueller ,A M Wetherell ,A De Min ,W Bartl ,F Fontanelli ,T S Hill ,U Schwickerath ,A Firestone ,S Hoorelbeke ,G Matthiae ,C Green ,L De Paula ,S Gumenyuk ,L K Resvanis ,M Kaiser ,G Tranströmer ,F Kapusta ,V Kostioukhine ,A Katargin ,P Fischer ,J Sánchez ,G Eigen ,T Podobnik ,B Dalmagne ,P Baillon ,A Ruiz ,S Meyer ,M E Pol ,G Ekspong ,O Ullaland ,T Spassov ,G Zumerle

doi:10.1016/s0370-2693(97)00405-x

Abstract

A sample of about 1.4 million hadronic Z decays, selected among the data recorded by the DELPHI detector at LEP during 1994, was used to measure for the first time the momentum spectra of K +, K 0, p, Λ and their antiparticles in gluon and quark jets. As observed for inclusive charged particles, the production spectra of identified particles were found to be softer in gluon jets than in quark jets, with a higher total multiplicity.

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