Inclusive Sigma(-) and Lambda(1520) production in hadronic Z decays

Authors
Abreu, P Adam, W Adye, T Adzic, P Ajinenko, I Albrecht, Z Alderweireld, T Alekseev, GD Alemany, R Allmendinger, T Allport, PP Almehed, S Amaldi, U Amapane, N Amato, S Anassontzis, EG Andersson, P Andreazza, A Andringa, S Antilogus, P Apel, WD Arnoud, Y Asman, B Augustin, JE Augustinus, A Baillon, P Ballestrero, A Bambade, P Barao, F Barbiellini, G Barbier, R Bardin, DY Barker, G Baroncelli, A Battaglia, M Baubillier, M Becks, KH Begalli, M Behrmann, A Beilliere, P Belokopytov, Y Benekos, NC Benvenuti, AC Berat, C Berggren, M Bertrand, D Besancon, M Bigi, M Bilenky, MS Bizouard, MA Bloch, D Blom, HM Bonesini, M Boonekamp, M Booth, PSL Borisov, G Bosio, C Botner, O Boudinov, E Bouquet, B Bourdarios, C Bowcock, TJV Boyko, I Bozovic, I Bozzo, M Bracko, M Branchini, P Brenner, RA Bruckman, P Brunet, JM Bugge, L Buran, T Buschbeck, B Buschmann, P Cabrera, S Caccia, M Calvi, M Camporesi, T Canale, V Carena, F Carroll, L Caso, C Gimenez, MVC Cattai, A Cavallo, FR Chabaud, V Charpentier, P Checchia, P Chelkov, GA Chierici, R Chliapnikov, P Chochula, P Chorowicz, V Chudoba, J Cieslik, K Collins, P Contri, R Cortina, E Cosme, G Cossutti, F Costa, M Crawley, HB Crennell, D Crepe, S Crosetti, G Maestro, JC Czellar, S Davenport, M Da Silva, W Della Ricca, G Delpierre, P Demaria, N De Nagelis, A De Boer, W De Clercq, C De Lotto, B De Min, A De Paula, L Dijkstra, H Di Ciaccio, L Dolbeau, J Doroba, K Dracos, M Drees, J Dris, M Duperrin, A Durand, JD Eigen, G Ekelof, T Ekspong, G Ellert, M Elsing, M Engel, JP Santo, ME Fanourakis, G Fassouliotis, D Fayot, J Feindt, M Ferrer, A Ferrer-Ribas, E Ferro, F Fichet, S Firestone, A Flagmeyer, U Foeth, H Fokitis, E Fontanelli, F Franek, B Frodesen, AG Fruhwirth, R Fulda-Quenzer, F Fuster, J Galloni, A Gamba, D Gamblin, S Gandelman, M Garcia, C Gaspar, C Gaspar, M Gasparini, U Gavillet, P Gazis, EN Gele, D Geralis, T Gerdyukov, L Ghodbane, N Gil, I Glege, F Gokieli, R Golob, B Gomez-Ceballos, G Goncalves, P Caballero, IG Gopal, G Gorn, L Gouz, Y Gracco, V Grahl, J Graziani, E Gris, P Grosdidier, G Grzelak, K Guy, J Haag, C Hahn, F Hahn, S Haider, S Hallgren, A Hamacher, K Hansen, J Harris, FJ Hauler, F Hedberg, V Heising, S Hernandez, JJ Herquet, P Herr, H Hessing, TL Heuser, JM Higon, E Holmgren, SO Holt, PJ Hoorelbeke, S Houlden, M Hrubec, J Huber, M Huet, K Hughes, GJ Hultqvist, K Jackson, JN Jacobsson, R Jalocha, P Janik, R Jarlskog, C Jarlskog, G Jarry, P Jean-Marie, B Jeans, D Johansson, EK Jonsson, P Joram, C Juillot, P Jungermann, L Kapusta, F Karafasoulis, K Katsanevas, S Katsoufis, EC Keranen, R Kernel, G Kersevan, BP Khokhlov, Y Khomenko, BA Khovanski, NN Kiiskinen, A King, B Kinvig, A Kjaer, NJ Klapp, O Klein, H Kluit, P Kokkinias, P Kostioukhine, V Kourkoumelis, C Kouznetsov, O Krammer, M Kriznic, E Krumstein, Z Kubinec, P Kurowska, J Kurvinen, K Lamsa, JW Lane, DW Laugier, JP Lauhakangas, R Leder, G Ledroit, F Lefebure, V Leinonen, L Leisos, A Leitner, R Lenzen, G Lepeltier, V Lesiak, T Lethuillier, M Libby, J Liebig, W Liko, D Lipniacka, A Lippi, I Loerstad, B Loken, JG Lopes, JH Lopez, JM Lopez-Fernandez, R Loukas, D Lutz, P Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A Lutz, P Lyons, L MacNaughton, J Mahon, JR Maio, A Malek, A Malmgren, TGM Maltezos, S Malychev, V Mandl, F Marco, J Marco, R Marechal, B Margoni, M Marin, JC Mariotti, C Markou, A Martinez-Rivero, C Garcia, SMI Masik, J Matroyiannopoulos, N Matorras, F Matteuzzi, C Matthiae, G Mazzucato, F Mazzucato, M McCubbin, M McKay, R McNulty, R McPherson, G Meroni, C Meyer, WT Migliore, E Mirabito, L Mitaroff, WA Mjoernmark, U Moa, T Moch, M Moeller, R Moenig, K Monge, MR Moraes, D Moreau, X Morettini, P Morton, G Mueller, U Muenich, K Mulders, M Mulet-Marquis, C Muresan, R Murray, WJ Muryn, B Myatt, G Myklebust, T Naraghi, F Nassiakou, M Navarria, FL Nawrocki, K Negri, P Neufeld, N Nicolaidou, R Nielsen, BS Niezurawski, P Nikolenko, M Nomokonov, V Nygren, A Obraztsov, V Olshevaki, AG Onofre, A Orava, R Orazi, G Osterberg, K Ouraou, A Oyanguren, A Paganoni, M Paiano, S Pain, R Paiva, R Palacios, J Palka, H Papadopoulou, TD Pape, L Parkes, C Parodi, F Parzefall, U Passeri, A Passon, O Pavel, T Pegoraro, M Peralta, L Pernicka, M Perrotta, A Petridou, C Petrolini, A Phillips, HT Pierre, F Pimenta, M Piotto, E Podobnik, T Pol, ME Polok, G Poropat, P Pozdniakov, V Privitera, P Pukhaeva, N Pullia, A Radojicic, D Ragazzi, S Rahmani, H Rames, J Ratoff, PN Read, AL Rebecchi, P Redaelli, NG Regler, M Rehn, J Reid, D Reinertsen, P Reinhardt, R Renton, PB Resvanis, LK Richard, F Ridky, J Rinaudo, G Ripp-Baudot, I Rohne, O Romero, A Ronchese, P Rosenberg, EI Rosinksy, P Roudeau, P Rovelli, T Royon, C Ruhlmann-Kleider, V Ruiz, A Saarikko, H Sacquin, Y Sadovsky, A Sajot, G Salt, J Sampsonidis, D Sannino, M Schwemling, P Schwering, B Schwickerath, U Scuri, F Seager, P Sedykh, Y Seemann, F Segar, AM Seibert, N Sekulin, R Shellard, RC Siebel, M Simard, L Simonetto, F Sisakian, AN Smadja, G Smirnov, N Smirnova, O Smith, GR Sokolov, A Solovianov, O Sopczak, A Sosnowski, R Spassov, T Spiriti, E Squarcia, S Stanescu, C Stanic, S Stanitzki, M Stevenson, K Stocchi, A Strauss, J Strub, R Stugu, B Szczekowski, M Szeptycka, M Tabarelli, T Taffard, A Tegenfeldt, F Terranova, F Thomas, J Timmermans, J Tinti, N Tkatchev, LG Tobin, M Todorova, S Tomaradze, A Tome, B Tonazzo, A Tortora, L Tortosa, P Transtromer, G Treille, D Tristram, G Trochimczuk, M Troncon, C Turluer, ML Tyapkin, IA Tyapkin, P Tzamarias, S Ullaland, O Uvarov, V Valenti, G Vallazza, E Van Dam, P Van den Boeck, W Van Eldik, J Van Lysebetten, A van Remortel, N Van Vulpen, I Vegni, G Ventura, L Venus, W Verbeure, F Verdier, P Verlato, M Vertogradov, LS Verzi, V Vilanova, D Vitale, L Vlasov, E Vodopyanov, AS Voulgaris, G Vrba, V Wahlen, H Walck, C Washbrook, AJ Weiser, C Wicke, D Wickens, JH Wilkinson, GR Winter, M Witek, M Wolf, G Yi, J Yushchenko, O Zalewska, A Zalewski, P Zavrtanik, D Zevgolatakos, E Zimin, NI Zintchenko, A Zoller, P Zucchelli, GC Zumerle, G Beckmann, WOG
Citation
P. Abreu et al., Inclusive Sigma(-) and Lambda(1520) production in hadronic Z decays, PHYS LETT B, 475(3-4), 2000, pp. 429-447
Citations number
33
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
475
Issue
3-4
Year of publication
2000
Pages
429 - 447
Database
ISI
SICI code
0370-2693(20000302)475:3-4<429:ISALPI>2.0.ZU;2-K
Abstract
Production of Sigma(-) and Lambda(1520) in hadronic Z decays has been measu red using the DELPHI detector at LEP. The Sigma(-) is directly reconstructe d as a charged track in the DELPHI microvertex detector and is identified b y its Sigma --> n pi decay leading to a kink between the Sigma(-) and pi-tr ack. The reconstruction of the Lambda(1520) resonance relies strongly on th e particle identification capabilities of the barrel Ring Imaging Cherenkov detector and on the ionisation loss measurement of the TPC. Inclusive prod uction spectra are measured for both particles. The production rates are me asured to be [NSigma-/N-Z(had)] = 0.081 +/- 0.002 +/- 0.010, [N-Lambda(1520)/N-Z(had)] = 0.029 +/- 0.005 +/- 0.005. The production rate of the Lambda(1520) suggests that a large fraction of t he stable baryons descend from orbitally excited baryonic states. It is sho wn that the baryon production rates in Z decays follow a universal phenomen ological law related to isospin, strangeness and mass of the particles. (C) 2000 Elsevier Science B.V. All rights reserved.