I - Experimental investigation of transverse spin asymmetries in mu-p SIDIS processes: Collins asymmetries
- Adolph, C.
- Alekseev, M.G.
- Alexakhin, V.Yu.
- Alexandrov, Yu.
- Alexeev, G.D.
- Amoroso, A.
- Antonov, A.A.
- Austregesilo, A.
- Badełek, B.
- Balestra, F.
- Barth, J.
- Baum, G.
- Bedfer, Y.
- Bernhard, J.
- Bertini, R.
- Bettinelli, M.
- Bicker, K.
- Bieling, J.
- Birsa, R.
- Bisplinghoff, J.
- Bordalo, P.
- Bradamante, F.
- Braun, C.
- Bravar, A.
- Bressan, A.
- Burtin, E.
- Chaberny, D.
- Chiosso, M.
- Chung, S.U.
- Cicuttin, A.
- Crespo, M.L.
- Dalla Torre, S.
- Das, S.
- Dasgupta, S.S.
- Denisov, O.Yu.
- Dhara, L.
- Donskov, S.V.
- Doshita, N.
- Duic, V.
- Dünnweber, W.
- Dziewiecki, M.
- Efremov, A.
- Elia, C.
- Eversheim, P.D.
- Eyrich, W.
- Faessler, M.
- Ferrero, A.
- Filin, A.
- Finger, M.
- Fischer, H.
- Franco, C.
- Du Fresne von Hohenesche, N.
- Friedrich, J.M.
- Garfagnini, R.
- Gautheron, F.
- Gavrichtchouk, O.P.
- Gazda, R.
- Gerassimov, S.
- Geyer, R.
- Giorgi, M.
- Gnesi, I.
- Gobbo, B.
- Goertz, S.
- Grabmüller, S.
- Grasso, A.
- Grube, B.
- Gushterski, R.
- Guskov, A.
- Guthörl, T.
- Haas, F.
- von Harrach, D.
- Hedicke, S.
- Heinsius, F.H.
- Herrmann, F.
- Hess, C.
- Hinterberger, F.
- Horikawa, N.
- Höppner, Ch.
- Dʼhose, N.
- Huber, S.
- Ishimoto, S.
- Ivanov, O.
- Ivanshin, Yu.
- Iwata, T.
- Jahn, R.
- Jasinski, P.
- Joosten, R.
- Kabuss, E.
- Kang, D.
- Ketzer, B.
- Khaustov, G.V.
- Khokhlov, Yu.A.
- Kisselev, Yu.
- Klein, F.
- Klimaszewski, K.
- Koblitz, S.
- Koivuniemi, J.H.
- Kolosov, V.N.
- Kondo, K.
- Königsmann, K.
- Konorov, I.
- Konstantinov, V.F.
- Korzenev, A.
- Kotzinian, A.M.
- Kouznetsov, O.
- Krämer, M.
- Kroumchtein, Z.V.
- Kunne, F.
- Kurek, K.
- Lauser, L.
- Le Goff, J.-M.
- Lednev, A.A.
- Lehmann, A.
- Levorato, S.
- Lichtenstadt, J.
- Maggiora, A.
- Magnon, A.
- Makke, N.
- Mallot, G.K.
- Mann, A.
- Marchand, C.
- Martin, A.
- Marzec, J.
- Matsuda, T.
- Meyer, W.
- Michigami, T.
- Mikhailov, Yu.V.
- Moinester, M.A.
- Morreale, A.
- Mutter, A.
- Nagaytsev, A.
- Nagel, T.
- Nassalski, J.P.
- Nerling, F.
- Neubert, S.
- Neyret, D.
- Nikolaenko, V.I.
- Nowak, W.D.
- Nunes, A.S.
- Olshevsky, A.G.
- Ostrick, M.
- Padee, A.
- Panknin, R.
- Panzieri, D.
- Parsamyan, B.
- Paul, S.
- Perevalova, E.
- Pesaro, G.
- Peshekhonov, D.V.
- Piragino, G.
- Platchkov, S.
- Pochodzalla, J.
- Polak, J.
- Polyakov, V.A.
- Pontecorvo, G.
- Pretz, J.
- Procureur, S.L.
- Quaresma, M.
- Quintans, C.
- Rajotte, J.-F.
- Ramos, S.
- Rapatsky, V.
- Reicherz, G.
- Richter, A.
- Rocco, E.
- Rondio, E.
- Rossiyskaya, N.S.
- Ryabchikov, D.I.
- Samoylenko, V.D.
- Sandacz, A.
- Sapozhnikov, M.G.
- Sarkar, S.
- Savin, I.A.
- Sbrizzai, G.
- Schiavon, P.
- Schill, C.
- Schlüter, T.
- Schmidt, K.
- Schmitt, L.
- Schönning, K.
- Schopferer, S.
- Schott, M.
- Shevchenko, O.Yu.
- Silva, L.
- Sinha, L.
- Sissakian, A.N.
- Slunecka, M.
- Smirnov, George
- Sosio, S.
- Sozzi, F.
- Srnka, A.
- Stolarski, M.
- Sulc, M.
- Sulej, R.
- Sznajder, P.
- Takekawa, S.
- ter Wolbeek, J.
- Tessaro, S.
- Tessarotto, F.
- Tkatchev, L.G.
- Uhl, S.
- Uman, I.
- Vandenbroucke, M.
- Virius, M.
- Vlassov, N.V.
- Wang, L.
- Windmolders, R.
- Wiślicki, W.
- Wollny, H.
- Zaremba, K.
- Zavertyaev, M.
- Zemlyanichkina, E.
- Ziembicki, M.
- Zhuravlev, N.
- Zvyagin, A.
DOIAbstract
International audienceThe COMPASS Collaboration at CERN has measured the transverse spin azimuthal asymmetry of charged hadrons produced in semi-inclusive deep inelastic scattering using a 160 GeV mu(+) beam and a transversely polarised NH3 target. The Collins asymmetry of the proton was extracted in the Bjorken x range 0.003 < x < 0.7. These new precise measurements confirm previous measurements from the COMPASS and HERMES Collaborations, which exhibit a definite effect in the valence quark region. The asymmetries for negative and positive hadrons are similar in magnitude and opposite in sign. They are compatible with model calculations in which the u-quark transversity is opposite in sign and somewhat larger than the d-quark transversity ...
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