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Quark helicity distributions from longitudinal spin asymmetries in muon-proton and muon-deuteron scattering
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SYSNO ASEP 0351515 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Quark helicity distributions from longitudinal spin asymmetries in muon-proton and muon-deuteron scattering Author(s) Alekseev, M. (IT)
Alexakhin, V. Yu. (RU)
Alexandrov, Yu. (RU)
Alexeev, G. D. (RU)
Amoroso, A. (IT)
Austregisilio, A. (DE)
Badelek, B. (PL)
Balestra, F. (IT)
Barth, J. (DE)
Baum, G. (DE)
Bedfer, Y. (FR)
Bernhard, J. (DE)
Bertini, R. (IT)
Bettinelli, M. (DE)
Birsa, R. (IT)
Bisplinghoff, J. (DE)
Bordalo, P. (PT)
Bradamante, F. (IT)
Bravar, A. (DE)
Bressan, A. (IT)
Brona, G. (PL)
Burtin, E. (FR)
Bussa, M. (IT)
Chaberny, D. (DE)
Chiosso, M. (IT)
Chung, S.U. (US)
Cicuttin, A. (IT)
Colantoni, M. (IT)
Crespo, M. (IT)
Dalla Torre, S. (IT)
Das, S. (IN)
Dasgupta, S. S. (IN)
Denisov, O. (IT)
Dhara, L. (IN)
Diaz, V. (IT)
Donskov, S. (RU)
Doshita, N. (JP)
Duic, V. (IT)
Dünnweber, W. (DE)
Efremov, A.V. (RU)
El Alaoui, A. (FR)
Eversheim, P. (DE)
Eyrich, W. (DE)
Faessler, M. (DE)
Ferrero, A. (IT)
Filin, A. (RU)
Finger, M. (CZ)
Finger jr., M. (CZ)
Fischer, H. (DE)
Franco, C. (PT)
Friedrich, J. (DE)
Garfagnini, R. (IT)
Gautheron, F. (DE)
Gavrichtchouk, O. (RU)
Gazda, R. (PL)
Gerassimov, S. (RU)
Geyer, R. (DE)
Giorgi, M. (IT)
Gnesi, I. (IT)
Gobbo, B. (IT)
Goertz, S. (DE)
Grabmüller, S. (DE)
Grasso, A. (IT)
Grube, B. (DE)
Gushterski, R. (RU)
Guskov, A. (RU)
Haas, F. (DE)
von Harrach, D. (DE)
Hasegawa, T. (JP)
Heinsius, F. (DE)
Herrmann, F. (DE)
Hess, C. (DE)
Hinterberger, F. (DE)
Horikawa, N. (JP)
Höppner, Ch. (DE)
d'Hose, N. (FR)
Ilgner, C. (DE)
Ishimoto, S. (JP)
Ivanov, O. (RU)
Ivanshin, Yu. (RU)
Iwata, T. (JP)
Jahn, R. (DE)
Jasinski, P. (DE)
Jegou, G. (FR)
Joosten, R. (DE)
Kabuss, E. (DE)
Kang, D. (DE)
Ketzer, B. (DE)
Khaustov, G. (RU)
Khokhlov, Y. (RU)
Kisselev, Y. (RU)
Klein, F. (DE)
Klimaszewski, K. (PL)
Koblitz, S. (DE)
Koivuniemi, J. (FI)
Kolosov, V. (RU)
Kondo, K. (JP)
Königsmann, K. (DE)
Konopka, R. (DE)
Konorov, I. (RU)
Konstantinov, V. (RU)
Korzenev, A. (DE)
Kotzinian, A. (IT)
Kouznetsov, O. (RU)
Kowalik, K. (PL)
Krämer, M. (DE)
Kral, A. (CZ)
Kroumchtein, Z. (RU)
Kuhn, R. (DE)
Kunne, F. (FR)
Kurek, K. (PL)
Lauser, L. (DE)
Le Goff, J. (FR)
Lednev, A. (RU)
Lehmann, A. (DE)
Levorato, S. (IT)
Lichtenstadt, J. (IL)
Liska, T. (CZ)
Maggiora, A. (IT)
Maggiora, M. (IT)
Magnon, A. (FR)
Makke, N. (FR)
Mallot, G. (CH)
Mann, A. (DE)
Marchand, C. (FR)
Martin, A. (IT)
Marzec, J. (PL)
Massmann, F. (DE)
Matsuda, T. (JP)
Meyer, W. (DE)
Author(s) Michigami, T. (JP)
Mikhailov, Y. (RU)
Moinester, M. (IL)
Mutter, A. (DE)
Nagaytsev, A. (RU)
Nagel, T. (DE)
Nassalski, J. (PL)
Negrini, S. (DE)
Nerling, F. (DE)
Neubert, S. (DE)
Neyret, D. (FR)
Nikolaenko, V. (RU)
Nunes, A.S. (PT)
Olshevsky, A. (RU)
Ostrick, M. (DE)
Padee, A. (PL)
Panknin, R. (DE)
Panzieri, D. (IT)
Parsamyan, B. (IT)
Paul, S. (DE)
Pawlukiewicz-Kaminska, B. (PL)
Perevalova, E. (RU)
Pesaro, G. (IT)
Peshekhonov, D. (RU)
Piragino, G. (IT)
Platchkov, S. (FR)
Pochodzalla, J. (DE)
Polak, J. (CZ)
Polyakov, V. (RU)
Pontecorvo, G. (RU)
Pretz, J. (DE)
Quintans, C. (PT)
Rajotte, J. (DE)
Ramos, S. (PT)
Rapatsky, V. (RU)
Reicherz, G. (DE)
Richter, A. (DE)
Robinet, F. (FR)
Rocco, E. (IT)
Rondio, E. (PL)
Ryabchikov, D. (RU)
Samoylenko, V. (RU)
Sandacz, A. (PL)
Santos, H. (PT)
Sapozhnikov, M. (RU)
Sarkar, S. (IN)
Savin, I. (RU)
Sbrizzai, G. (IT)
Schiavon, P. (IT)
Schill, C. (DE)
Schlütter, T. (DE)
Schmitt, L. (DE)
Schopferer, S. (DE)
Schröder, W. (DE)
Shevchenko, O. (RU)
Siebert, H. (DE)
Silva, L. (CZ)
Sinha, L. (IN)
Sissakian, A. (RU)
Slunecka, M. (RU)
Smirnov, G. (RU)
Sosio, S. (IT)
Sozzi, F. (IT)
Srnka, Aleš (UPT-D) RID, ORCID, SAI
Stolarski, M. (PL)
Sulc, M. (CZ)
Sulej, R. (PL)
Takekawa, S. (IL)
Tessaro, S. (DE)
Tessarotto, F. (IT)
Teufel, A. (DE)
Tkatchev, L. (RU)
Uhl, S. (DE)
Uman, I. (DE)
Virius, M. (CZ)
Vlassov, N. (RU)
Vossen, A. (DE)
Weitzel, Q. (DE)
Windmolders, R. (DE)
Wislicki, W. (PL)
Wollny, H. (DE)
Zaremba, K. (PL)
Zavertyaev, M. (RU)
Zemlyanichkina, E. (RU)
Ziembicki, M. (PL)
Zhao, J. (US)
Zhuravlev, N. (RU)
Zvyagin, A. (DE)Number of authors 218 Source Title Physics Letters. B. - : Elsevier - ISSN 0370-2693
Roč. 693, č. 3 (2010), s. 227-235Number of pages 9 s. Language eng - English Country NL - Netherlands Keywords semi-inclusive deep inelastic scattering ; structure function ; parton distribution functions Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders R&D Projects ME 492 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z20650511 - UPT-D (2005-2011) UT WOS 000283211800005 DOI 10.1016/j.physletb.2010.08.034 Annotation Double-spin asymmetries for production of charged pions and kaons in semi-inclusive deep-inelastic muon scattering have been measured by the COMPASS experiment at CERN. The data, obtained by scattering a 160 GeV muon beam off a longitudinally polarised NH3 target, cover a range of the Bjorken variable x between 0.004 and 0.7. A leading order evaluation of the helicity distributions for the three lightest quarks and antiquark flavours derived from these asymmetries and from our previous deuteron data is presented. The resulting values of the sea quark distributions are small and do not show any sizable dependence on x in the range of the measurements. No significant difference is observed between the strange and antistrange helicity distributions, both compatible with zero. The integrated value of the flavour asymmetry of the helicity distribution of the light-quark sea, is found to be slightly positive, about 1.5 standard deviations away from zero. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2011
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