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Preprint
Report number arXiv:0802.3023 ; IRFU-08-14 ; CERN-PH-EP-2008-003 ; CERN-PH-EP-2008-003
Title Direct Measurement of the Gluon Polarisation in the Nucleon via Charmed Meson Production
Author(s)

Alekseev, M. (Piemonte Orientale U., Alessandria) ; Alexakhin, V.Yu. (Dubna, JINR) ; Alexandrov, Yu. (Lebedev Inst.) ; Alexeev, G.D. (Dubna, JINR) ; Amoroso, A. (Turin U.) ; Arbuzov, A. (Dubna, JINR) ; Badelek, Barbara Maria (Warsaw U.) ; Balestra, F. (Turin U.) ; Ball, J. (Saclay) ; Barth, J. (Bonn U.) ; Baum, Guenter (Bielefeld U.) ; Bedfer, Y. (Saclay) ; Bernet, Colin (Saclay) ; Bertini, R. (Turin U.) ; Bettinelli, M. (Munich U.) ; Birsa, R. (INFN, Trieste) ; Bisplinghoff, J. (Bonn U., HISKP) ; Bordalo, P. ; Bradamante, Franco (Trieste U.) ; Brona, G. (Warsaw U.) ; Burtin, E. (Saclay) ; Bussa, M.P. (Turin U.) ; Chapiro, A. (ICTP, Trieste) ; Chiosso, M. (Turin U.) ; Cicuttin, A. (ICTP, Trieste) ; Colantoni, M. (INFN, Turin) ; Crespo, M.L. (ICTP, Trieste) ; Dalla Torre, S. (INFN, Trieste) ; Dafni, T. (Saclay) ; Das, S. (Saha Inst.) ; Dasgupta, S.S. (Burdwan U.) ; De Masi, R. (Munich, Tech. U.) ; Dedek, N. (Munich U.) ; Dhara, L. (Saha Inst.) ; Diaz, V. (ICTP, Trieste) ; Dinkelbach, A.M. (Munich, Tech. U.) ; Donskov, S.V. (Serpukhov, IHEP) ; Dorofeev, V.A. (Serpukhov, IHEP) ; Doshita, N. (Nagoya U.) ; Duic, V. (Trieste U.) ; Dunnweber, W. (Munich U.) ; Eversheim, P.D. (Bonn U., HISKP) ; Eyrich, W. (Erlangen - Nuremberg U.) ; Faessler, M. (Munich U.) ; Falaleev, V. (CERN) ; Ferrero, L. (Turin U.) ; Finger, M. (Charles U.) ; Finger, M., Jr. (Dubna, JINR) ; Fischer, H. (Freiburg U.) ; Franco, C. (Lisbon, IST) ; Franz, J. (Freiburg U.) ; Friedrich, J.M. (Munich, Tech. U.) ; Garfagnini, R. (Turin U.) ; Gautheron, Fabrice (Bielefeld U.) ; Gavrichtchouk, O.P. (Dubna, JINR) ; Gazda, R. (Warsaw U.) ; Geyer, R. (Munich U.) ; Giorgi, M. (Trieste U.) ; Gobbo, Benigno (INFN, Trieste) ; Gorin, A.M. (Serpukhov, IHEP) ; Grabmuller, S. (Munich, Tech. U.) ; Grajek, O.A. (Warsaw U.) ; Grasso, A. (Turin U.) ; Grube, B. (Munich, Tech. U.) ; Gushterski, R. (Dubna, JINR) ; Guskov, A. (Dubna, JINR) ; Haas, F. (Munich, Tech. U.) ; Hannappel, J. (Bonn U.) ; von Harrach, D. (Mainz U., Inst. Phys.) ; Hasegawa, T. (Miyazaki U.) ; Heckmann, J. (Ruhr U., Bochum) ; Hedicke, S. (Freiburg U.) ; Heinsius, Fritz-Herbert (Freiburg U.) ; Hermann, R. (Mainz U., Inst. Phys.) ; Hess, C. (Ruhr U., Bochum) ; Hinterberger, F. (Bonn U., HISKP) ; von Hodenberg, M. (Freiburg U.) ; Horikawa, S. (Nagoya U.) ; d'Hose, N. (Saclay) ; Ilgner, C. (Munich U.) ; Ioukaev, A.I. (Dubna, JINR) ; Ishimoto, S. (Nagoya U.) ; Ivanov, O. (Dubna, JINR) ; Ivanshin, Yu. (Dubna, JINR) ; Jahn, R. (Bonn U., HISKP) ; Janata, A. (Dubna, JINR) ; Jasinski, P. (Mainz U., Inst. Phys.) ; Joosten, R. (Bonn U., HISKP) ; Jouravlev, N.I. (Dubna, JINR) ; Kabuss, E. (Mainz U., Inst. Phys.) ; Kang, D. (Freiburg U.) ; Ketzer, Bernhard (Munich, Tech. U.) ; Khaustov, G.V. (Serpukhov, IHEP) ; Khokhlov, Yu.A. (Serpukhov, IHEP) ; Klein, F. (Bonn U.) ; Klimaszewski, K. (Warsaw U.) ; Koblitz, S. (Mainz U., Inst. Phys.) ; Kolosov, V.N. (Serpukhov, IHEP) ; Komissarov, E.V. (Dubna, JINR) ; Kondo, K. (Nagoya U.) ; Konigsmann, Kay (Freiburg U.) ; Konstantinov, V.F. (Serpukhov, IHEP) ; Korentchenko, A.S. (Dubna, JINR) ; Koutchinski, N.A. (Dubna, JINR) ; Kral, A. (Prague, Tech. U.) ; Kravchuk, N.P. (Dubna, JINR) ; Kroumchtein, Z.V. (Dubna, JINR) ; Kuhn, R. (Munich, Tech. U.) ; Kunne, Fabienne (Saclay) ; Kurek, Krzysztof (Warsaw U.) ; Ladygin, M.E. (Serpukhov, IHEP) ; Le Goff, Jean-Marc (Saclay) ; Lednev, A.A. (Serpukhov, IHEP) ; Lehmann, A. (Erlangen - Nuremberg U.) ; Levorato, S. (Trieste U.) ; Lichtenstadt, J. (Tel Aviv U.) ; Liska, T. (Prague, Tech. U.) ; Ludwig, I. (Freiburg U.) ; Maggiora, A. (INFN, Turin) ; Maggiora, M. (Turin U.) ; Magnon, A. (Saclay) ; Mallot, G.K. (CERN) ; Mann, A. (Munich, Tech. U.) ; Marchand, C. (Saclay) ; Marroncle, J. (Saclay) ; Martin, A. (Trieste U.) ; Marzec, J. (Warsaw U. of Tech.) ; Massmann, F. (Bonn U., HISKP) ; Matsuda, T. (Miyazaki U.) ; Meyer, W.Thomas (Ruhr U., Bochum) ; Mikhailov, Yu.V. (Serpukhov, IHEP) ; Moinester, M.A. (Tel Aviv U.) ; Nagaytsev, A. (Dubna, JINR) ; Nagel, T. (Munich, Tech. U.) ; Nahle, O. (Bonn U., HISKP) ; Nassalski, J. (Warsaw U.) ; Neliba, S. (Prague, Tech. U.) ; Nerling, F. (Freiburg U.) ; Neubert, S. (Munich, Tech. U.) ; Neyret, D.P. (Saclay) ; Nikolaenko, V.I. (Serpukhov, IHEP) ; Nikolaev, K. (Dubna, JINR) ; Olshevsky, A.G. (Dubna, JINR) ; Ostrick, M. (Bonn U.) ; Padee, A. (Warsaw U. of Tech.) ; Pagano, P. (Trieste U.) ; Panebianco, S. (Saclay) ; Panknin, R. (Bonn U.) ; Panzieri, D. (Piemonte Orientale U., Alessandria) ; Paul, S. (Munich, Tech. U.) ; Pawlukiewicz-Kaminska, B. (Warsaw U.) ; Peshekhonov, D.V. (Dubna, JINR) ; Peshekhonov, V.D. (Dubna, JINR) ; Piragino, G. (Turin U.) ; Platchkov, Stephane (Saclay) ; Pochodzalla, J. (Mainz U., Inst. Phys.) ; Polak, J. (Liberec Tech. U.) ; Polyakov, V.A. (Serpukhov, IHEP) ; Pretz, J. (Bonn U.) ; Procureur, S. (Saclay) ; Quintans, C. (Lisbon, IST) ; Rajotte, J.F. (Munich U.) ; Ramos, S. ; Rapatsky, V. (Dubna, JINR) ; Reicherz, G. (Ruhr U., Bochum) ; Reggiani, D. (CERN) ; Richter, A. (Erlangen - Nuremberg U.) ; Robinet, F. (Saclay) ; Rondio, Ewa (Warsaw U.) ; Rozhdestvensky, A.M. (Dubna, JINR) ; Ryabchikov, D.I. (Serpukhov, IHEP) ; Samoylenko, V.D. (Serpukhov, IHEP) ; Sandacz, A. (Warsaw U.) ; Sapozhnikov, M.G. (Dubna, JINR) ; Sarkar, S. (Saha Inst.) ; Savin, Igor A. (Dubna, JINR) ; Schiavon, P. (Trieste U.) ; Schill, Christian (Freiburg U.) ; Schonmeier, P. (Erlangen - Nuremberg U.) ; Schroder, W. (Erlangen - Nuremberg U.) ; Shevchenko, O.Yu. (Dubna, JINR) ; Silva, L. (Lisbon, IST) ; Sinha, L. (Saha Inst.) ; Sissakian, A.N. (Dubna, JINR) ; Slunecka, M. (Dubna, JINR) ; Smirnov, G.I. (Dubna, JINR) ; Sosio, S. (Turin U.) ; Sozzi, F. (Trieste U.) ; Srnka, A. (Masaryk U., Brno) ; Stinzing, F. (Erlangen - Nuremberg U.) ; Sugonyaev, V.P. (Serpukhov, IHEP) ; Sulc, M. (Liberec Tech. U.) ; Sulej, R. (Warsaw U. of Tech.) ; Tchalishev, V.V. (Dubna, JINR) ; Tessaro, S. (INFN, Trieste) ; Tessarotto, F. (INFN, Trieste) ; Teufel, A. (Erlangen - Nuremberg U.) ; Tkatchev, L.G. (Dubna, JINR) ; Venugopal, G. (Bonn U., HISKP) ; Virius, M. (Prague, Tech. U.) ; Vlassov, N.V. (Dubna, JINR) ; Vossen, A. (Freiburg U.) ; Webb, Robert C. (Erlangen - Nuremberg U.) ; Weitzel, Q. (Munich, Tech. U.) ; Windmolders, R. (Bonn U.) ; Wirth, S. (Erlangen - Nuremberg U.) ; Wislicki, W. (Warsaw U.) ; Wollny, H. (Freiburg U.) ; Zaremba, K. (Warsaw U. of Tech.) ; Zavertyaev, M. (Lebedev Inst.) ; Zemlyanichkina, E. (Dubna, JINR) ; Ziegler, R. (Bonn U., HISKP) ; Zvyagin, A. (Munich U.)

Publication 2008
Imprint 08 Feb 2008
Number of pages 10
Published in: Phys. Rev. Lett.
Subject category Particle Physics - Experiment
Accelerator/Facility, Experiment CERN SPS ; COMPASS NA58
Abstract 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.
Other source Inspire
Submitted by [email protected]

 


 ჩანაწერი შექმნილია 2008-02-22, ბოლოს შესწორებულია 2022-01-14


სრული ტექსტი:
arXiv:0802.3023 - სრული ტექსტის ჩამოტვირთვაPDF
phep-2008-003 - სრული ტექსტის ჩამოტვირთვაPDF
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