First measurement of transferred polarization in the exclusive ep-->e'K+Lambda--> reaction.

D S Carman,K Joo,M D Mestayer,B A Raue,G Adams,P Ambrozewicz,E Anciant,M Anghinolfi,D S Armstrong,B Asavapibhop,G Audit,T Auger,H Avakian,H Bagdasaryan,J P Ball,S P Barrow,M Battaglieri,K Beard,M Bektasoglu,M Bellis,C Bennhold,N Bianchi,A S Biselli,S Boiarinov,B E Bonner,S Bouchigny,R Bradford,D Branford,W J Briscoe,W K Brooks,V D Burkert,C Butuceanu,J R Calarco,B Carnahan,A Cazes,C Cetina,L Ciciani,R Clark,P L Cole,A Coleman,D Cords,P Corvisiero,D Crabb,H Crannell,J P Cummings,E DeSanctis,P V Degtyarenko,H Denizli,L Dennis,R DeVita,K V Dharmawardane,K S Dhuga,C Djalali,G E Dodge,D Doughty,P Dragovitsch,M Dugger,S Dytman,O P Dzyubak,M Eckhause,H Egiyan,K S Egiyan,L Elouadrhiri,A Empl,P Eugenio,R Fatemi,G Fedotov,R J Feuerbach,J Ficenec,T A Forest,H Funsten,S J Gaff,M Gai,M Garçon,G Gavalian,S Gilad,G P Gilfoyle,K L Giovanetti,P Girard,E Golovach,C I O Gordon,K Griffioen,S Grimes,M Guidal,M Guillo,L Guo,V Gyurjyan,C Hadjidakis,R S Hakobyan,J Hardie,D Heddle,P Heimberg,F W Hersman,K Hicks,R S Hicks,M Holtrop,J Hu,C E Hyde-Wright,B Ishkhanov,M M Ito,D Jenkins,J H Kelley,J D Kellie,M Khandaker,K Y Kim,K Kim,W Kim,A Klein,F J Klein,A V Klimenko,M Klusman,M Kossov,L H Kramer,Y Kuang,S E Kuhn,J Kuhn,J Lachniet,J M Laget,D Lawrence,J Li,K Livingston,A Longhi,K Lukashin,J J Manak,C Marchand,T Mart,S McAleer,J McCarthy,J W C McNabb,B A Mecking,S Mehrabyan,J J Melone,C A Meyer,K Mikhailov,R Minehart,M Mirazita,R Miskimen,V Mokeev,L Morand,S A Morrow,M U Mozer,V Muccifora,J Mueller,L Y Murphy,G S Mutchler,J Napolitano,R Nasseripour,S O Nelson,S Niccolai,G Niculescu,I Niculescu,B B Niczyporuk,R A Niyazov,M Nozar,G V O'Rielly,A K Opper,M Osipenko,K Park,K Paschke,E Pasyuk,G Peterson,N Pivnyuk,D Pocanic,O Pogorelko,E Polli,S Pozdniakov,B M Preedom,J W Price,Y Prok,D Protopopescu,L M Qin,G Riccardi,G Ricco,M Ripani,B G Ritchie,F Ronchetti,P Rossi,D Rowntree,P Rubin,F Sabatié,K Sabourov,C Salgado,J Santoro,V Sapunenko,R A Schumacher,V S Serov,Y G Sharabian,J Shaw,S Simionatto,A V Skabelin,E S Smith,L C Smith,D I Sober,M Spraker,A Stavinsky,S Stepanyan,P Stoler,M Taiuti,S Taylor,D J Tedeschi,U Thoma,R Thompson,L Todor,C Tur,M Ungaro,M F Vineyard,A V Vlassov,K Wang,L B Weinstein,H Weller,D P Weygand,C S Whisnant,E Wolin,M H Wood,A Yegneswaran,J Yun,B Zhang,J Zhao,Z Zhou

Physical review letters（2003）

Cited 1|Views6

No score

Abstract

The first measurements of the transferred polarization for the exclusive e-->p-->e(')K+Lambda--> reaction have been performed at Jefferson Laboratory using the CLAS spectrometer. A 2.567 GeV beam was used to measure the hyperon polarization over Q2 from 0.3 to 1.5 (GeV/c)(2), W from 1.6 to 2.15 GeV, and over the full K+ center-of-mass angular range. Comparison with predictions of hadrodynamic models indicates strong sensitivity to the underlying resonance contributions. A nonrelativistic quark-model interpretation of our data suggests that the ssmacr; quark pair is produced with spins predominantly antialigned. Implications for the validity of the most widely used quark-pair creation operator are discussed.

Translated text

AI Read Science

Must-Reading Tree

Example

Generate MRT to find the research sequence of this paper

Chat Paper

Summary is being generated by the instructions you defined