First measurement of the strange quark asymmetry at the Z0 peak

L Chaussard,F Naraghi,H Schneider,R C Shellard,O Yushchenko,F Zach,H Briand,M J Bates,K Hultqvist,J Bjarne,G Lenzen,P Vincent,A Firestone,J Dolbeau,S Ueberschaer,I A Tyapkin,V Kostioukhine,I Ripp,D Z Toet,A Zalewska,U Mjoernmark,D Vilanova,S Bosworth,Ph Charpentier,M Reale,L G Tkatchev,C Kreuter,J Chauveau,V Chorowicz,H J Hilke,A Maio,D C Fries,R Contri,D Reid,C Gaspar,J H Koehne,J Drees,T S Hill,A Buys,C Lambropoulos,K D Brand,K Yip,E I Rosenberg,M Zito,Z Krumstein,M Regler,M Prest,T Moa,R Zuberi,W Krupinski,Z Hajduk,A Daum,M Baubillier,B Stugu,A Andreazza,F Mandl,R Orava,G Della Ricca,L S Vertogradov,F Fontanelli,B Franck,P Collins,I Roncagliolo,G Valenti,M Mazzucato,P Frenkiel,R Janik,M Witek,M V Castillo Gimenez,I Siccama,R Strub,J A Valls Ferrer,V Ruhlmann-Kleider,F Waldner,R Moeller,P Rebecchi,E Graziani,A Stocchi,T Maron,H T Phillips,E Karvelas,S Katsanevas,M Weierstall,W Oberschulte-Beckmann,G Cosme,R Gokieli,L Lanceri,N I Zimin,E Zevgolatakos,P Herquet,J Baudot,A M Wetherell,V Lepeltier,F Bianchi,G Piana,H Wahlen,H Mueller,D Crennell,J Pennanen,F Verbeure,H Saarikko,E Fokitis,R Sosnowski,P Lutz,W Hao,B Loerstad,V Bocci,L Tortora,S Haider,D Edsall,D Souza-Santos,D Gamba,E Spiriti,F Hahn,R Mc Kay,A Maltezos,W Bartl,M Gandelman,P Abreu,I Stavitski,D Wicke,A G Frodesen,J A Hernando,P Poropat,L Gorn,W Bonivento,J Medbo,C K Legan,P Antilogus,T Tabarelli,G Polok,A G Olshevski,A Petrolini,M Szczekowski,C Walck,M L Andrieux,B A Khomenko,O Podobrin,V Malychev,Yu Belokopytov,M Blume,J Fister,B Dalmagne,C Matteuzzi,P Siegrist,B Muryn,A Trombini,P Langefeld,G Borisov,D Fassouliotis,N J Kjaer,N Ershaidat,R Aleksan,A Klovning,T Todorov,P Morettini,L Bugge,A Lilja,A Hakansson,P Kubinec,S Simonetti,V Obraztsov,T A Filippas,F Parodi,E Agasi,K Stepaniak,F Pierre,G Damgaard,G Tristram,T L Hessing,R Sekulin,F Richard,R Barate,A Sadovsky,M Feindt,E Vallazza,W Ruckstuhl,M Koratzinos,O Tchikilev,B Golob,G Vegni,R Ehret,G D Alekseev,P Weilhammer,J J Gomez Y Cadenas,S Squarcia,P Roudeau,A Pullia,K Kulka,A Ferrer,Y Lemoigne,G Rinaudo,Y Sacquin,J Dahm,M Tyndel,F Simonetto,E Cortina,S Almehed,P Branchini,G Crosetti,E Rosso,A Normand,G Myatt,F Ledroit,H Klein,M Szeptycka,H Staeck,A Lopez-Fernandez,M Pimenta,Y Arnoud,V Gracco,L Vitale,F Fulda-Quenzer,W J Murray,P Bambade,B Koene,M A Lopez Aguera,W T Meyer,M Battaglia,P Carrilho,V Perevozchikov,J N Jackson,A N Sisakian,G Smadja,R Lauhakangas,F Kapusta,P Beltran,M Michelotto,R Mc Nulty,H Herr,M Bigi,G Matthiae,G Ekspong,F Carena,V Chabaud,A Ruiz,P N Ratoff,A Passeri,H Rahmani,B Åsman,I Lippi,M Berggren,T J V Bowcock,M Davenport,Ph Gavillet,F Cao,C Defoix,F Stichelbaut,V Cassio,D Y Bardin,L Ventura,M Pernicka,G Wormser,P Niss,P Kokkinias,R Pain,U Haedinger,Y Dufour,C Bosio,M Verlato,R Lindner,B Bouquet,H Foeth,J Guy,T Lesiak,R Jacobsson,P Delpierre,N N Khovanski,P Negri,H B Crawley,T Buran,S Tzamarias,O Ullaland,C Caso,G Sajot,M Mc Cubbin,G Leder,L Brillault,K Kurvinen,S J Alvsvaag,M S Bilenky,A Seitz,A Wehr,A M Segar,J Timmermans,L K Resvanis,I Kronkvist,B Ueberschaer,F Formenti,P Gunnarsson,G Grosdidier,D Gillespie ,G Stavropoulos ,L Di Ciaccio ,S O Holmgren ,C Mariotti ,F Djama ,V Lapin ,T Rovelli ,L Carroll ,S Ragazzi ,H Pałka ,M Esṕırito Santo ,W Neumann ,A Vodopyanov ,B Maréchal ,K Moenig ,A Lipniacka ,J Richardson ,U Gasparini ,E Katsoufis ,N Neumeister ,B Sitár ,F Matorras ,G P Gopal ,Florent Dupont ,M Karlsson ,J Rameš ,W D Apel ,P Brückman ,P Paganini ,F Cossutti ,D Radojičić ,P Baillon ,A Perrotta ,C Kourkoumelis ,P.s.l Booth ,C Martínez-Rivero ,M Paganoni ,S Marti-Garcia ,G Jarlskog ,G Sciolla ,J Chrin ,N Smirnov ,S Blyth ,V Hedberg ,E Dahl‐Jensen ,A Baroncelli ,W Kucewicz ,J J Hernández ,P Juillot ,P Ioannou ,M Dam ,K A Drees ,R Keränen ,B De Lotto ,P Chochula ,J M Brunet ,K Korcyl ,P Van Dam ,M Canepa ,G W Van Apeldoorn ,C Bourdarios ,G Chelkov ,S Czellár ,Rui Henriques ,B Tomé ,L Lyons ,B S Nielsen ,K F Read ,D W Lane ,A Zaitsev ,A De Angelis ,V Cindro ,T Camporesi ,W Adam ,Th D Papadopoulou ,W Trischuk ,W Vénus ,D Zavrtanik ,P Renton ,M L Turluer ,M Pegoraro ,A B Fenyuk ,M R Monge ,J Lemonne ,R Nicolaidou ,M Dönszelmann ,F R Cavallo ,A Chan ,E Vlasov ,K Hamacher ,J Gerber ,G R Smith ,V Nikolaenko ,E Migliore ,Y Sedykh ,M Wielers ,H Fürstenau ,A Hallgren ,A Cattai ,P Checchia ,A Tsirou ,C Garćıa ,S R Hahn ,J L Contreras ,G Tranströmer ,M Lokajı́ček ,P Kluit ,M Begalli ,S Navas ,A Nomerotski ,L Mirabito ,G J Barker ,M Bozzo ,A Tilquin ,L De Paula ,G Wilkinson ,J Królikowski ,N Demaria ,E Torassa ,F Martínez-Vidal ,A M Rybin ,D Blöch ,Aurelio Juste Rozas ,R.c.a Brown ,C De Clercq ,L Peralta ,M Górski ,E Higón ,W S C Williams ,J Lämsä ,K H Becks ,A C Benvenuti ,J A Barrio ,A Ouraou ,C Bricman ,J Strauss ,K Österberg ,V Uvarov ,M E Pol ,C Lacasta ,W K Van Doninck ,S Amato ,M Bonesini ,J E Augustin ,M Elsing ,L Jönsson ,M Sannino ,J Van Eldik ,S Plaszczynski ,P Privitera ,T Adye ,O Bärring ,M Kaiser ,M Krammer ,H Dijkstra ,J M Vizan Garcia ,Philip Patrick Allport ,P Kramer ,S Stapnes ,T B Skaali ,B Boštjančič ,B T King ,A Romero ,T Ekelöf ,P Billoir ,C Meroni ,O Botner ,V Pozdniakov ,C Petridou ,J Loken ,K Cankoçak ,J Maillard ,Kathy Huet ,M Winter ,O Kouznetsov ,J Wickens ,M A E Schyns ,P Jarry ,H De Boeck ,P Ronchese ,M Hahn ,J Lozano ,Daniel Bertrand ,M Calvi ,L Roos ,S De Brabandere ,H Pernegger ,M Voutilainen ,F Almeida ,F J Harris ,P Zalewski ,T Spassov ,Α Μάρκου ,B Jean‐Marie ,M Dris ,D Loukas ,V Vrba ,C Troncon ,R Brenner ,K Woschnagg ,D Holthuizen ,J L Fousset ,F L Navarria ,I B Laktineh ,S Němeček ,I Mikulec ,V Lefébure ,D Treille ,F Barão ,R Frühwirth ,P Jałocha ,N Redaelli ,G Kalmus ,J P Laugier ,K Doroba ,V Canale ,P Dauncey ,G Mæhlum ,I Ajinenko ,A De Min ,O Smirnova ,G C Zucchelli ,D Žontar ,P Pagès ,J Marco ,D Gelé ,P F Honoré ,Erik Johansson ,A Augustinus ,L Yu ,U Amaldi ,F Scuri ,P Chliapnikov ,J Řídký ,G Theodosiou ,L Cerrito ,A Tomaradze ,M Margoni ,J P Engel ,R Leitner ,Ch De La Vaissière ,P Beillière ,J C Marin ,W Mitaroff ,J Salt ,T Bologneşe ,F Grard ,W Da Silva ,J Sánchez ,E N Gazis ,M.d.m De Fez Laso ,C Stănescu ,L Pape ,M Dracos ,P J Holt ,M Caccia ,M Houlden ,D Liko ,W De Boer ,C De Saint-Jean ,J Cuevas ,G Zumerle

doi:10.1007/bf01564817

First measurement of the strange quark asymmetry at the Z0 peak

L Chaussard, F Naraghi + Show 552 more

https://doi.org/10.1007/bf01564817

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Journal: Zeitschrift für Physik C Particles and Fields	Publication Date: Mar 1, 1995
Citations: 3	License type: other-oa

Affiliation: French National Centre for Scientific Research, Grenoble Alpes University, Karlsruhe Institute of Technology, Rutherford Appleton Laboratory, Stockholm University, Lund University, University of Wuppertal, Iowa State University, Collège de France, DSM (Netherlands), University of Oxford, European Organization for Nuclear Research, Joint Institute for Nuclear Research, University of Genoa, University of Padua, University of Udine, University of Bergen, University of Milan, University of Helsinki, University of Bologna, Comenius University Bratislava, Spanish National Research Council, University of Trieste, University of Copenhagen, Université Paris Cité, Istituto Superiore di Sanità, National and Kapodistrian University of Athens, University of Warsaw, University of Turin, National Polytechnic School, Uppsala University, University of Oslo, University of Ljubljana, University of Liverpool, Lancaster University

#Z0 Peak #Ring Imaging Cherenkov Detector #Measurement Of Asymmetry #Hadron Calorimeter #Forward-backward Asymmetry #Charged Kaons #DELPHI Detector #Detection Of Neutron #High Neutron #Strange Quark Asymmetry

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A measurement of the strange quark forward-backward asymmetry at the Z0 peak was performed using 718,000 multihadronic Z0 decays collected by the DELPHI detector at LEP in 1992. Thes-quark was tagged by the presence of high momentum charged kaons identified by the Ring Imaging Cherenkov detector and byΛ0;s decaying intopπ−. Thes-quark purity obtained was estimated for the two hadrons to be 43%. The averages-quark asymmetry was found to be 0.131±0.035 (stat.) ±0.013 (syst.). The forward-backward asymmetry was measured for unresolvedd-ands-quarks, tagged by the detection of a high energy neutron or neutral kaon in the Hadron Calorimeter. The combinedd-ands-quark purity was 69% and their asymmetry was found to be 0.112±0.031 (stat.) ±0.054 (syst.).

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First measurement of the strange quark asymmetry at the Z0 peak