Direct Measurement of the Gluon Polarisation in the Nucleon via Charmed Meson Production

M G Alekseev,V Yu Alexakhin,Yu A Alexandrov,G D Alexeev,A Amoroso,A E Arbuzov,B Badelek,F Balestra,J P Ball,John A Barth,Gunter Baum,Y Bedfer,Colin Bernet,R Bertini, M Bettinelli,R Birsa,J Bisplinghoff,P Bordalo,F Bradamante,Grzegorz Brona,E Burtin,M P Bussa, A Chapiro,M Chiosso,A Cicuttin,M L Colantoni,M L Crespo,S Dalla Torre,T Dafni,Sudip Sundar Das,S S Dasgupta,R De Masi,N Dedek,L Dhara,V Diaz,A M Dinkelbach,S V Donskov,V A Dorofeev,N Doshita,V Duic,W Dunnweber,P D Eversheim,W Eyrich,M A Faessler,V Falaleev,L Ferrero, M Finger,H M Fischer,C Franco,J Franz,J M Friedrich,R Garfagnini,F Gautheron,O P Gavrichtchouk,R Gazda,R Geyer,M A Giorgi,B Gobbo,A M Gorin, S Grabmuller,O A Grajek,A Grasso,B Grube,R Gushterski,A Guskov, F A Haas,J Hannappel,D Von Harrach, Toshiharu Hasegawa,J Heckmann,S Hedicke,F H Heinsius,Robert Michael Hermann,C F Hess,F Hinterberger,M Von Hodenberg,S Horikawa,N Dhose,C Ilgner,A I Ioukaev,S Ishimoto,O Ivanov,Yu I Ivanshin,R Jahn,A Janata,P Jasinski,R Joosten,N I Jouravlev,E M Kabuss,Dohyun Kang,B Ketzer, G G Khaustov,Yu A Khokhlov,F J Klein,K Klimaszewski,S Koblitz,V N Kolosov,E V Komissarov,K Kondo, K Konigsmann,V F Konstantinov,A S Korentchenko,N A Koutchinski, A Kral,N P Kravchuk,Z V Kroumchtein,R Kuhn,F Kunne,K Kurek,M E Ladygin,Jeanmarc Le Goff,A A Lednev,A Lehmann,S Levorato,J Lichtenstadt,T Liska, I Ludwig,A Maggiora,M Maggiora,A Magnon,G K Mallot,A Mann,C Marchand,J Marroncle, A D Martin,J Marzec,F Massmann,T Matsuda, W Thomas Meyer,Yu Mikhailov,M A Moinester,A Nagaytsev,T Nagel,O Nahle,J Nassalski,S Neliba,F Nerling,S Neubert,D Neyret, V Nikolaenko,K Nikolaev,A G Olshevsky,M Ostrick,A Padee,P Pagano,S Panebianco,R Panknin,D Panzieri,S Paul,B Pawlukiewiczkaminska,D V Peshekhonov,V D Peshekhonov,G Piragino,S Platchkov, J Pochodzalla, J M Polak,V A Polyakov,J Pretz,S Procureur,C Quintans,J F Rajotte,S Ramos,V Rapatsky,G Reicherz,D Reggiani,A Richter,F Robinet,E Rondio,A M Rozhdestvensky,D I Ryabchikov,V D Samoylenko,A Sandacz,M G Sapozhnikov,S Sarkar,I Savin,P Schiavon,C Schill, P Schonmeier, W Schroder,O Yu Shevchenko,Laura Gonzalez Silva,L Sinha,A N Sissakian,M Slunecka,G I Smirnov,S Sosio,F Sozzi,A Srnka,F Stinzing,V P Sugonyaev,M Sulc,R Sulej,V V Tchalishev,S Tessaro,F Tessarotto,A Teufel,L G Tkatchev,G Venugopal,M Virius,N V Vlassov,A Vossen,R Webb,Q Weitzel,R Windmolders, St Wirth,W Wislicki,H Wollny,K Zaremba,M Zavertyaev,E Zemlyanichkina,Regina G Ziegler, Alexander Zvyagin

Physical Review Letters（2008）

引用 25|浏览44

暂无评分

摘要

We present the first measurement of the gluon polarisation in the nucleon based on the photon-gluon fusion process tagged by charmed meson production and decay to charged K and pi. The data were collected in polarised muon scattering off a polarised deuteron target by the COMPASS collaboration at CERN during 2002-2004. The result of this LO analysis is _x = -0.47 +- 0.44 (stat) +- 0.15 (syst) at ~= 0.11 and a scale mu^2 ~ 13 (GeV/c)^2.

查看译文

关键词

high energy physics

AI 理解论文

溯源树

样例

生成溯源树，研究论文发展脉络

Chat Paper

正在生成论文摘要