MEASUREMENT OF THE SPIN-DENSITY MATRIX FOR THE RHO(0), K-ASTERISK(0)(892) AND PHI-PRODUCED IN Z(0) DECAYS

Authors
ABREU P ADAM W ADYE T ALEKSEEV GD ALEMANY R ALLPORT PP ALMEHED S AMALDI U AMATO S ANDERSSON P ANDREAZZA A ANTILOGUS P APEL WD ARNOUD Y ASMAN B AUGUSTIN JE AUGUSTINUS A BAILLON P BAMBADE P BARAO F BARBI M BARBIELLINI G BARDIN DY BARKER G BARONCELLI A BARRING O BATES MJ BATTAGLIA M BAUBILLIER M BAUDOT J BECKS KH BEGALLI M BEILLIERE P BELOKOPYTOV Y BENVENUTI AC BERAT C BERGGREN M BERTINI D BERTRAND D BESANCON M BIANCHI F BIGI M BILENKY MS BILLOIR P BIZOUARD MA BLOCH D BLUME M BONESINI M BONIVENTO W BOOTH PSL BORGLAND AW BORISOV G BOSIO C BOTNER O BOUDINOV E BOUQUET B BOURDARIOS C BOWCOCK TJV BOZZO M BRANCHINI P BRAND KD BRENKE T BRENNER RA BRICMAN C BROWN RCA BRUCKMAN P BRUNET JM BUGGE L BURAN T BURGSMUELLER T BUSCHMANN P CABRERA S CACCIA M CALVI M ROZAS AJC CAMPORESI T CANALE V CANEPA M CAO F CARENA F CARROLL L CASO C GIMENEZ MVC CATTAI A CAVALLO FR CHABAUD V CHAPKIN M CHARPENTIER P CHAUSSARD L CHECCHIA P CHELKOV GA CHEN M CHIERICI R CHLIAPNIKOV P CHOCHULA P CHOROWICZ V CHUDOBA J CINDRO V COLLINS P CONTRI R CORTINA E COSME G COSSUTTI F COWELL JH CRAWLEY HB CRENNELL D CROSETTI G MAESTRO JC CZELLAR S DAHM J DALMAGNE B DAM M DAMGAARD G DAUNCEY PD DAVENPORT M DASILVA W DEGHORAIN A DELLARICCA G DELPIERRE P DEMARIA N DEANGELIS A DEBOER W DEBRABANDERE S DECLERCQ C DELAVAISSIERE C DELOTTO B DEMIN A DEPAULA L DIJKSTRA H DICIACCIO L DIDIODATO A DJANNATI A DOLBEAU J DOROBA K DRACOS M DREES J DREES KA DRIS M DURAND JD EDSALL D EHRET R EIGEN G EKELOF T EKSPONG G ELSING M ENGEL JP ERZEN B SANTO ME FALK E FANOURAKIS G FASSOULIOTIS D FEINDT M FENYUK A FERRARI P FERRER A FICHET S FILIPPAS TA FIRESTONE A FISCHER PA FOETH H FOKITIS E FONTANELLI F FORMENTI F FRANEK B FRODESEN AG FRUHWIRTH R FULDAQUENZER F FUSTER J GALLONI A GAMBA D GANDELMAN M GARCIA C GARCIA J GASPAR C GASPARINI U GAVILLET P GAZIS EN GELE D GERBER JP GERDYUKOV L GOKIELI R GOLOB B GONCALVES P GOPAL G GORN L GORSKI M GOUZ Y GRACCO V GRAZIANI E GREEN C GREFRATH A GRIS P GROSDIDIER G GRZELAK K GUNTHER M GUY J HAHN F HAHN S HAJDUK Z HALLGREN A HAMACHER K HARRIS FJ HEDBERG V HENRIQUES R HERNANDEZ JJ HERQUET P HERR H HESSING TL HEUSER JM HIGON E HOLMGREN SO HOLT PJ HOLTHUIZEN D HOORELBEKE S HOULDEN M HRUBEC J HUET K HULTQVIST K JACKSON JN JACOBSSON R JALOCHA P JANIK R JARLSKOG C JARLSKOG G JARRY P JEANMARIE B JOHANSSON EK JONSSON L JONSSON P JORAM C JUILLOT P KAISER M KAPUSTA F KARAFASOULIS K KATSANEVAS S KATSOUFIS EC KERANEN R KHOKHLOV Y KHOMENKO BA KHOVANSKI NN KING B KJAER NJ KLAPP O KLEIN H KLUIT P KNOBLAUCH D KOKKINIAS P KORATZINOS M KORCYL K KOSTIOUKHINE V KOURKOUMELIS C KOUZNETSOV O KRAMMER M KREUTER C KRONKVIST I KRSTIC J KRUMSTEIN Z KRUPINSKI W KUBINEC P KUCEWICZ W KURVINEN K LACASTA C LAKTINEH I LAMSA JW LANCERI L LANE DW LANGEFELD P LAUGIER JP LAUHAKANGAS R LEDER G LEDROIT F LEFEBURE V LEGAN CK LEISOS A LEITNER R LEMONNE J LENZEN G LEPELTIER V LESIAK T LIBBY J LIKO D LIPNIACKA A LIPPI I LOERSTAD B LOKEN JG LOPEZ JM LOUKAS D LUTZ P LYONS L MACNAUGHTON J MAEHLUM G MAHON JR MAIO A MALMGREN TGM MALYCHEV V MANDL F MARCO J MARCO R MARECHAL B MARGONI M MARIN JC MARIOTTI C MARKOU A MARTINEZRIVERO C MARTINEZVIDAL F GARCIA SMI MASIK J MATORRAS F MATTEUZZI C MATTHIAE G MAZZUCATO M MCCUBBIN M MCKAY R MCNULTY R MCPHERSON G MEDBO J MERONI C MEYER S MEYER WT MIAGKOV A MICHELOTTO M MIGLIORE E MIRABITO L MITAROFF WA MJOERNMARK U MOA T MOELLER R MOENIG K MONGE MR MORETTINI P MUELLER H MUENICH K MULDERS M MUNDIM LM MURRAY WJ MURYN B MYATT G MYKLEBUST T NARAGHI F NAVARRIA FL NAVAS S NAWROCKI K NEGRI P NEMECEK S NEUMANN W NEUMEISTER N NICOLAIDOU R NIELSEN BS NIEUWENHUIZEN M NIKOLAENKO V NIKOLENKO M NISS P NOMEROTSKI A NORMAND A NYGREN A OBERSCHULTEBECKMANN W OBRAZTSOV V OLSHEVSKI AG ONOFRE A ORAVA R ORAZI G OSTERBERG K OURAOU A PAGANINI P PAGANONI M PAIN R PALKA H PAPADOPOULOU TD PAPAGEORGIOU K PAPE L PARKES C PARODI F PARZEFALL U PASSERI A PEGORARO M PERALTA L PERNEGGER H PERNICKA M PERROTTA A PETRIDOU C PETROLINI A PHILLIPS HT PIANA G PIERRE F PIMENTA M PODOBNIK T PODOBRIN O POL ME POLOK G POROPAT P POZDNIAKOV V PRIVITERA P PUKHAEVA N PULLIA A RADOJICIC D RAGAZZI S RAHMANI H RATOFF PN READ AL REALE M REBECCHI P REDAELLI NG REGLER M REID D REINHARDT R RENTON PB RESVANIS LK RICHARD F RIDKY J RINAUDO G ROHNE O ROMERO A RONCHESE P ROOS L ROSENBERG EI ROSINSKY P ROUDEAU P ROVELLI T RUHLMANNKLEIDER V RUIZ A RYBICKI K SAARIKKO H SACQUIN Y SADOVSKY A SAJOT G SALT J SANNINO M SCHNEIDER H SCHWICKERATH U SCHYNS MAE SCIOLLA G SCURI F SEAGER P SEDYKH Y SEGAR AM SEITZ A SEKULIN R SERBELLONI L SHELLARD RC SHERIDAN A SIEGRIST P SILVESTRE R SIMONETTO F SISAKIAN AN SKAALI TB SMADJA G SMIRNOV N SMIRNOVA O SMITH GR SOKOLOV A SOLOVIANOV O SOSNOWSKI R SOUZASANTOS D SPASSOV T SPIRITI E SPONHOLZ P SQUARCIA S STAMPFER D STANESCU C STANIC S STAPNES S STAVITSKI I STEVENSON K STOCCHI A STRAUSS J STRUB R STUGU B SZCZEKOWSKI M SZEPTYCKA M TABARELLI T TAVERNET JP TEGENFELDT F TERRANOVA F THOMAS J TILQUIN A TIMMERMANS J TKATCHEV LG TODOROV T TODOROVA S TOET DZ TOMARADZE A TONAZZO A TORTORA L TRANSTROMER G TREILLE D TRISTRAM G TROMBINI A TRONCON C TSIROU A TURLUER ML TYAPKIN IA TYNDEL M TZAMARIAS S UEBERSCHAER B ULLALAND O UVAROV V VALENTI G VALLAZZA E VANAPELDOORN GW VANDAM P
Citation
P. Abreu et al., MEASUREMENT OF THE SPIN-DENSITY MATRIX FOR THE RHO(0), K-ASTERISK(0)(892) AND PHI-PRODUCED IN Z(0) DECAYS, Physics letters. Section B, 406(3), 1997, pp. 271-286
Citations number
31
Categorie Soggetti
Physics
Journal title
Physics letters. Section B → ACNP
ISSN journal
03702693
Volume
406
Issue
3
Year of publication
1997
Pages
271 - 286
Database
ISI
SICI code
0370-2693(1997)406:3<271:MOTSMF>2.0.ZU;2-I
Abstract
The spin density matrix elements for the rho(0), K-0(892) and phi pro duced in hadronic Z(0) decays are measured in the DELPHI detector. The re is no evidence for spin alignment of the K-0(892) and phi, in the region x(p) less than or equal to 0.3 (x(p) = p/p(beam)), where rho(00 ) = 0.33 +/- 0.05 and rho(00) = 0.30 +/- 0.04, respectively. In the fr agmentation region, x(p) greater than or equal to 0.4, there is some i ndication for spin alignment of the rho(0) and K-0(892), since rho(00 ) = 0.43 +/- 0.05 and rho(00) = 0.46 +/- 0.08, respectively. These val ues are compared with those found in meson-induced hadronic reactions. For the phi, rho(00) = 0.30 +/- 0.04 for x(p) greater than or equal t o 0.4 and 0.55 +/- 0.10 for x(p) greater than or equal to 0.7. The off -diagonal spin density matrix element rho(1-1) is consistent with zero in all cases. (C) 1997 Published by Elsevier Science B.V.