Hauptseite > CERN Experiments > Fixed Target Experiments > COMPASS > COMPASS Conference Proceedings > Measurement of $P_T$-weighted Sivers asymmetries in leptoproduction of hadrons |
Article | |
Report number | arXiv:1809.02936 ; CERN-EP-2018-242 |
Title | Measurement of $P_T$-weighted Sivers asymmetries in leptoproduction of hadrons |
Author(s) |
Alexeev, M.G. (Turin U.) ; Alexeev, G.D. (Dubna, JINR) ; Amoroso, A. (Turin U. ; INFN, Turin) ; Andrieux, V. (Illinois U., Urbana ; IRFU, Saclay) ; Anfimov, N.V. (Dubna, JINR) ; Anosov, V. (Dubna, JINR) ; Antoshkin, A. (Dubna, JINR) ; Augsten, K. (Dubna, JINR ; CTU, Prague) ; Augustyniak, W. (NCBJ, Swierk) ; Azevedo, C.D.R. (Aveiro U.) ; Badełek, B. (Warsaw U.) ; Balestra, F. (Turin U. ; INFN, Turin) ; Ball, M. (Bonn U., HISKP) ; Barth, J. (Bonn U.) ; Barone, V. (Piemonte Orientale U., Alessandria ; INFN, Turin) ; Beck, R. (Bonn U., HISKP) ; Bedfer, Y. (IRFU, Saclay) ; Bernhard, J. (Mainz U., Inst. Kernphys. ; CERN) ; Bicker, K. (Munich, Tech. U. ; CERN) ; Bielert, E.R. (CERN) ; Bodlak, M. (Charles U., Prague (main)) ; Bordalo, P. (LIP, Lisbon ; Lisbon, CFTP) ; Bradamante, F. (Trieste U. ; INFN, Trieste) ; Bressan, A. (Trieste U. ; INFN, Trieste) ; Büchele, M. (Freiburg U.) ; Burtsev, V.E. (Tomsk Polytechnic U.) ; Chang, W.-C. (Taiwan, Inst. Phys.) ; Chatterjee, C. (Matrivani Inst., Calcutta) ; Chiosso, M. (Turin U. ; INFN, Turin) ; Chumakov, A.G. (Tomsk Polytechnic U.) ; Chung, S.-U. (Munich, Tech. U. ; Brookhaven ; Pusan Natl. U.) ; Cicuttin, A. (INFN, Trieste ; ICTP, Trieste) ; Crespo, M.L. (INFN, Trieste ; ICTP, Trieste) ; Dalla Torre, S. (INFN, Trieste) ; Dasgupta, S.S. (Matrivani Inst., Calcutta) ; Dasgupta, S. (Trieste U. ; INFN, Trieste) ; Denisov, O.Yu. (INFN, Turin) ; Dhara, L. (Matrivani Inst., Calcutta) ; Donskov, S.V. (Serpukhov, IHEP) ; Doshita, N. (Yamagata U.) ; Dreisbach, Ch. (Munich, Tech. U.) ; Dünnweber, W. (Heidelberg U.) ; Dusaev, R.R. (Tomsk Polytechnic U.) ; Dziewiecki, M. (Warsaw U. of Tech.) ; Efremov, A. (Dubna, JINR ; Unlisted) ; Elia, C. (Trieste U. ; INFN, Trieste) ; Eversheim, P.D. (Bonn U., HISKP) ; Faessler, M. (Heidelberg U.) ; Ferrero, A. (IRFU, Saclay) ; Finger, M. (Charles U., Prague (main)) ; Finger, Michael, Jr. (Charles U., Prague (main)) ; Fischer, H. (Freiburg U.) ; Franco, C. (LIP, Lisbon) ; du Fresne von Hohenesche, N. (Mainz U., Inst. Kernphys. ; CERN) ; Friedrich, J.M. (Munich, Tech. U.) ; Frolov, V. (Dubna, JINR ; CERN) ; Gautheron, F. (Ruhr U., Bochum ; Illinois U., Urbana) ; Gavrichtchouk, O.P. (Dubna, JINR) ; Gerassimov, S. (Lebedev Inst. ; Munich, Tech. U.) ; Giarra, J. (Mainz U., Inst. Kernphys.) ; Gnesi, I. (Turin U. ; INFN, Turin) ; Gorzellik, M. (Freiburg U. ; Heidelberg U.) ; Grasso, A. (Turin U. ; INFN, Turin) ; Gridin, A. (Dubna, JINR) ; Grosse Perdekamp, M. (Illinois U., Urbana) ; Grube, B. (Munich, Tech. U.) ; Guskov, A. (Dubna, JINR) ; Hahne, D. (Bonn U.) ; Hamar, G. (INFN, Trieste) ; von Harrach, D. (Mainz U., Inst. Kernphys.) ; Heitz, R. (Illinois U., Urbana) ; Herrmann, F. (Freiburg U.) ; Horikawa, N. (Nagoya U. ; Chubu U.) ; d'Hose, N. (IRFU, Saclay) ; Hsieh, C.-Y. (Taiwan, Inst. Phys. ; Taiwan, Natl. Central U.) ; Huber, S. (Munich, Tech. U.) ; Ishimoto, S. (Yamagata U. ; KEK, Tsukuba) ; Ivanov, A. (Turin U. ; INFN, Turin) ; Iwata, T. (Yamagata U.) ; Jandek, M. (CTU, Prague) ; Jary, V. (CTU, Prague) ; Joosten, R. (Bonn U., HISKP) ; Jörg, P. (Freiburg U. ; Bonn U.) ; Juraskova, K. (CTU, Prague) ; Kabuß, E. (Mainz U., Inst. Kernphys.) ; Kaspar, F. (Munich, Tech. U.) ; Kerbizi, A. (Trieste U. ; INFN, Trieste) ; Ketzer, B. (Bonn U., HISKP) ; Khaustov, G.V. (Serpukhov, IHEP) ; Khokhlov, Yu.A. (Serpukhov, IHEP ; Moscow, MIPT) ; Kisselev, Yu. (Dubna, JINR) ; Klein, F. (Bonn U.) ; Koivuniemi, J.H. (Ruhr U., Bochum ; Illinois U., Urbana) ; Kolosov, V.N. (Serpukhov, IHEP) ; Kondo, K. (Yamagata U.) ; Konorov, I. (Lebedev Inst. ; Munich, Tech. U.) ; Konstantinov, V.F. (Serpukhov, IHEP) ; Kotzinian, A.M. (INFN, Turin ; Yerevan Phys. Inst.) ; Kouznetsov, O.M. (Dubna, JINR) ; Kral, Z. (CTU, Prague) ; Krämer, M. (Munich, Tech. U.) ; Krinner, F. (Munich, Tech. U.) ; Kroumchtein, Z.V. (Dubna, JINR) ; Kulinich, Y. (Illinois U., Urbana) ; Kunne, F. (IRFU, Saclay) ; Kurek, K. (NCBJ, Swierk) ; Kurjata, R.P. (Warsaw U. of Tech.) ; Kveton, A. (CTU, Prague) ; Lednev, A.A. (Serpukhov, IHEP) ; Levorato, S. (INFN, Trieste) ; Lian, Y.-S. (Taiwan, Inst. Phys. ; Taiwan, Natl. Kaohsiung Normal U.) ; Lichtenstadt, J. (Tel Aviv U.) ; Longo, R. (Turin U. ; INFN, Turin) ; Lyubovitskij, V.E. (Tomsk Polytechnic U. ; Tubingen U.) ; Maggiora, A. (INFN, Turin) ; Magnon, A. (Illinois U., Urbana) ; Makins, N. (Illinois U., Urbana) ; Makke, N. (INFN, Trieste ; ICTP, Trieste) ; Mallot, G.K. (CERN) ; Mamon, S.A. (Tomsk Polytechnic U.) ; Marianski, B. (NCBJ, Swierk) ; Martin, A. (Trieste U. ; INFN, Trieste) ; Marzec, J. (Warsaw U. of Tech.) ; Matoušek, J. (Trieste U.) ; Matsuda, T. (Miyazaki U.) ; Meshcheryakov, G.V. (Dubna, JINR) ; Meyer, M. (Illinois U., Urbana ; IRFU, Saclay) ; Meyer, W. (Ruhr U., Bochum) ; Mikhailov, Yu.V. (Serpukhov, IHEP) ; Mikhasenko, M. (Bonn U., HISKP) ; Mitrofanov, E. (Dubna, JINR) ; Mitrofanov, N. (Dubna, JINR) ; Miyachi, Y. (Yamagata U.) ; Moretti, A. (Trieste U.) ; Nagaytsev, A. (Dubna, JINR) ; Neyret, D. (IRFU, Saclay) ; Nový, J. (CTU, Prague ; CERN) ; Nowak, W.-D. (Mainz U., Inst. Kernphys.) ; Nukazuka, G. (Yamagata U.) ; Nunes, A.S. (LIP, Lisbon) ; Olshevsky, A.G. (Dubna, JINR) ; Orlov, I. (Dubna, JINR) ; Ostrick, M. (Mainz U., Inst. Kernphys.) ; Panzieri, D. (INFN, Turin ; Turin U.) ; Parsamyan, B. (Turin U. ; INFN, Turin) ; Paul, S. (Munich, Tech. U.) ; Peng, J.-C. (Illinois U., Urbana) ; Pereira, F. (Aveiro U.) ; Pešek, M. (Charles U., Prague (main)) ; Pešková, M. (Charles U., Prague (main)) ; Peshekhonov, D.V. (Dubna, JINR) ; Pierre, N. (Mainz U., Inst. Kernphys. ; IRFU, Saclay) ; Platchkov, S. (IRFU, Saclay) ; Pochodzalla, J. (Mainz U., Inst. Kernphys.) ; Polyakov, V.A. (Serpukhov, IHEP) ; Pretz, J. (Bonn U. ; Aachen, Tech. Hochsch.) ; Quaresma, M. (LIP, Lisbon) ; Quintans, C. (LIP, Lisbon) ; Ramos, S. (LIP, Lisbon ; Lisbon, CFTP) ; Regali, C. (Freiburg U.) ; Reicherz, G. (Ruhr U., Bochum) ; Riedl, C. (Illinois U., Urbana) ; Ryabchikov, D.I. (Serpukhov, IHEP ; Munich, Tech. U.) ; Rybnikov, A. (Dubna, JINR) ; Rychter, A. (Warsaw U. of Tech.) ; Salac, R. (CTU, Prague) ; Samoylenko, V.D. (Serpukhov, IHEP) ; Sandacz, A. (NCBJ, Swierk) ; Sarkar, S. (Matrivani Inst., Calcutta) ; Savin, I.A. (Dubna, JINR ; Unlisted) ; Sawada, T. (Taiwan, Inst. Phys.) ; Sbrizzai, G. (Trieste U. ; INFN, Trieste) ; Schiavon, P. (Trieste U. ; INFN, Trieste) ; Schmieden, H. (Bonn U.) ; Seder, E. (IRFU, Saclay) ; Selyunin, A. (Dubna, JINR) ; Silva, L. (LIP, Lisbon) ; Sinha, L. (Matrivani Inst., Calcutta) ; Sirtl, S. (Freiburg U.) ; Slunecka, M. (Dubna, JINR) ; Smolik, J. (Dubna, JINR) ; Sozzi, F. (INFN, Trieste) ; Srnka, A. (Inst. Sci. Instruments, Brno) ; Steffen, D. (CERN ; Munich, Tech. U.) ; Stolarski, M. (LIP, Lisbon) ; Subrt, O. (CERN ; CTU, Prague) ; Sulc, M. (Liberec Tech. U.) ; Suzuki, H. (Yamagata U. ; Chubu U.) ; Szabelski, A. (Trieste U.) ; Szameitat, T. (Freiburg U. ; Heidelberg U.) ; Sznajder, P. (NCBJ, Swierk) ; Tasevsky, M. (Dubna, JINR) ; Tessaro, S. (INFN, Trieste) ; Tessarotto, F. (INFN, Trieste) ; Thiel, A. (Bonn U., HISKP) ; Tomsa, J. (Charles U., Prague (main)) ; Tosello, F. (INFN, Turin) ; Tskhay, V. (Lebedev Inst.) ; Uhl, S. (Munich, Tech. U.) ; Vasilishin, B.I. (Tomsk Polytechnic U.) ; Vauth, A. (CERN) ; Veit, B.M. (Mainz U., Inst. Kernphys.) ; Veloso, J. (Aveiro U.) ; Vidon, A. (IRFU, Saclay) ; Virius, M. (CTU, Prague) ; Wagner, M. (Bonn U., HISKP) ; Wallner, S. (Munich, Tech. U.) ; Wilfert, M. (Mainz U., Inst. Kernphys.) ; Zaremba, K. (Warsaw U. of Tech.) ; Zavada, P. (Dubna, JINR) ; Zavertyaev, M. (Lebedev Inst.) ; Zhao, Y. (INFN, Trieste) ; Zemlyanichkina, E. (Dubna, JINR ; Unlisted) ; Ziembicki, M. (Warsaw U. of Tech.) |
Publication | 2019-03 |
Imprint | 02 Sep 2018 |
Number of pages | 20 |
Note | 23 pages, 12 figures |
In: | Nucl. Phys. B 940 (2019) 34-53 |
DOI | 10.1016/j.nuclphysb.2018.12.024 |
Subject category | hep-ex ; Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology |
Accelerator/Facility, Experiment | CERN SPS ; COMPASS NA58 |
Free keywords | QCD ; polarization ; experimental results ; SIDIS ; TMDs ; weighted asymmetries ; Sivers TMD |
Abstract | The transverse spin asymmetries measured in semi-inclusive leptoproduction of hadrons, when weighted with the hadron transverse momentum $P_T$, allow for the extraction of important transverse-momentum-dependent distribution functions. In particular, the weighted Sivers asymmetries provide direct information on the Sivers function, which is a leading-twist distribution that arises from a correlation between the transverse momentum of an unpolarised quark in a transversely polarised nucleon and the spin of the nucleon. Using the high-statistics data collected by the COMPASS Collaboration in 2010 with a transversely polarised proton target, we have evaluated two types of $P_T$-weighted Sivers asymmetries, which are both proportional to the product of the first transverse moment of the Sivers function and of the fragmentation function. The results are compared to the standard unweighted Sivers asymmetries and used to extract the first transverse moments of the Sivers distributions for $u$ and $d$ quarks. |
Copyright/License | preprint: (License: CC-BY-4.0) publication: © The Author (License: CC-BY-4.0) |