Contribution of exclusive diffractive processes to the measured azimuthal asymmetries in SIDIS

Agarwala, J.; Giarra, J.; Sznajder, P.; Finger, M., jr.; Mamon, S.A.; Kunne, F.; Augustyniak, W.; Riedl, C.; Bernhard, J.; Thiel, A.; Crespo, M.L.; Pretz, J.; Matsuda, T.; Koivuniemi, J.H.; Schmieden, H.; Buchele, M.; Novy, J.; Pesek, M.; Gautheron, F.; Lyubovitskij, V.E.; Tessarotto, F.; Kolosov, V.N.; Dhara, L.; Antequera, J. Berenguer; Olshevsky, A.G.; Gorzellik, M.; Nukazuka, G.; Vauth, A.; Jorg, P.; Parsamyan, B.; Uhl, S.; Meshcheryakov, G.V.; Chumakov, A.G.; Kisselev, Yu.; Burtsev, V.E.; Horikawa, K. Kondo; Franco, C.; Srnka, A.; Ryabchikov, D.I.; Makins, N.; Platchkov, S.; Rybnikov, A.; Kerbizi, A.; Savin, I.A.; Moretti, A.; Bodlak, M.; Peshekhonov, D.V.; Ramos, S.; Klein, F.; Augsten, K.; Mitrofanov, N.; Lian, Y.-S.; Krinner, F.; Sinha, L.; Guskov, A.; Koval, A.; Zhao, Y.; Virius, M.; Miyachi, Y.; Naim, C.; Alexeev, G.D.; Andrieux, V.; Maggiora, A.; Kurek, K.; Ostrick, M.; Bradamante, F.; Nunes, A.S.; Makke, N.; Rychter, A.; Barth, J.; Bedfer, Y.; Ferrero, A.; Denisov, O.Yu.; Mallot, G.K.; Konorov, I.; Marzec, J.; Beck, R.; Donskov, S.V.; Kabuß, E.; Kulinich, Y.; Meyer, M.; Magnon, A.; Gavrichtchouk, O.P.; Nowak, W.-D.; D'Ago, D.; Grube, B.; Peskova, M.; Panzieri, D.; Dasgupta, S.S.; Chung, S.-U.; Zavada, P.; Chatterjee, C.; Dalla Torre, S.; Marianski, B.; Vasilishin, B.I.; Gnesi, I.; Lichtenstadt, J.; Ventura, B.; Pierre, N.; Khaustov, G.V.; Sbrizzai, G.; Vidon, A.; Ivanov, A.; Martin, A.; Quaresma, M.; Mattson, G.; Kurjata, R.P.; Chang, W.-C.; Khokhlov, Yu.A.; Levorato, S.; Jary, V.; Tskhay, V.; Grasso, A.; Subrt, O.; Townsend, A.; Sarkar, S.; Mikhasenko, M.; Sandacz, A.; Matousek, J.; Gerassimov, S.; Dunnweber, W.; Heitz, R.; Kveton, A.; Stolarski, M.; Quintans, C.; Samoylenko, V.D.; Efremov, A.; Eversheim, P.D.; Pereira, F.; Zemko, M.; Tomsa, J.; Dreisbach, Ch.; Wagner, M.; Faessler, M.; von Harrach, D.; Amoroso, A.; Selyunin, A.; Finger, M.; Maltsev, A.; Herrmann, F.; Szabelski, A.; Kouznetsov, O.M.; Alexeev, M.G.; Sulc, M.; Mikhailov, Yu.V.; Lin, P.-J.; Correia, P.M.M.; Horikawa, N.; Gridin, A.; Doshita, N.; Bressan, A.; Fischer, H.; Dusaev, R.R.; Ishimoto, S.; Grosse Perdekamp, M.; Paul, S.; Lavickova, K.; Rudnicki, T.; Zaremba, K.; Dasgupta, S.; Ball, M.; Veloso, J.; Nagaytsev, A.; Kral, Z.; Zemlyanichkina, E.; Anosov, V.; Frolov, V.; Konstantinov, V.F.; Steffen, D.; Kaspar, F.; Iwata, T.; Ketzer, B.; Tosello, F.; Veit, B.M.; Reicherz, G.; Azevedo, C.D.R.; Meyer, W.; Hsieh, C.-Y.; Kotzinian, A.M.; Jandek, M.; Cicuttin, A.; Friedrich, J.M.; Suzuki, H.; Bordalo, P.; Pochodzalla, J.; Balestra, F.; d'Hose, N.; Polyakov, V.A.; Pekeler, H.; Neyret, D.; Denisenko, I.; Joosten, R.; Anfimov, N.V.; Mitrofanov, E.; Ziembicki, M.; Badełek, B.; Longo, R.; Peng, J.-C.; Slunecka, M.; Tessaro, S.; Wilfert, M.; Smolik, J.; Zavertyaev, M.; Huber, S.; Chiosso, M.; Wallner, S.

doi:10.1016/j.nuclphysb.2020.115039

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Article
Report number	arXiv:1912.10322 ; CERN-EP-2019-286
Title	Contribution of exclusive diffractive processes to the measured azimuthal asymmetries in SIDIS
Author(s)	Agarwala, J. (INFN, Trieste) ; Alexeev, M.G. ; Alexeev, G.D. ; Amoroso, A. ; Andrieux, V. ; Anfimov, N.V. ; Anosov, V. ; Augsten, K. ; Augustyniak, W. ; Azevedo, C.D.R. ; Badełek, B. ; Balestra, F. ; Ball, M. ; Barth, J. ; Beck, R. ; Bedfer, Y. (IRFU, Saclay) ; Antequera, J. Berenguer ; Bernhard, J. ; Bodlak, M. ; Bordalo, P. ; Bradamante, F. ; Bressan, A. ; Buchele, M. ; Burtsev, V.E. ; Chang, W.-C. ; Chatterjee, C. ; Chiosso, M. ; Chumakov, A.G. ; Chung, S.-U. ; Cicuttin, A. ; Correia, P.M.M. ; Crespo, M.L. ; D'Ago, D. ; Dalla Torre, S. ; Dasgupta, S.S. ; Dasgupta, S. ; Denisenko, I. ; Denisov, O.Yu. ; Dhara, L. ; Donskov, S.V. ; Doshita, N. ; Dreisbach, Ch. ; Dunnweber, W. ; Dusaev, R.R. ; Efremov, A. ; Eversheim, P.D. ; Faessler, M. ; Ferrero, A. (IRFU, Saclay) ; Finger, M. ; Finger, M., jr. ; Fischer, H. ; Franco, C. ; Friedrich, J.M. ; Frolov, V. ; Gautheron, F. ; Gavrichtchouk, O.P. ; Gerassimov, S. ; Giarra, J. ; Gnesi, I. ; Gorzellik, M. ; Grasso, A. ; Gridin, A. ; Grosse Perdekamp, M. ; Grube, B. ; Guskov, A. ; von Harrach, D. ; Heitz, R. ; Herrmann, F. ; Horikawa, N. ; d'Hose, N. (IRFU, Saclay) ; Hsieh, C.-Y. ; Huber, S. ; Ishimoto, S. ; Ivanov, A. ; Iwata, T. ; Jandek, M. ; Jary, V. ; Joosten, R. ; Jorg, P. ; Kabuß, E. ; Kaspar, F. ; Kerbizi, A. ; Ketzer, B. ; Khaustov, G.V. ; Khokhlov, Yu.A. ; Kisselev, Yu. ; Klein, F. ; Koivuniemi, J.H. ; Kolosov, V.N. ; Horikawa, K. Kondo ; Konorov, I. ; Konstantinov, V.F. ; Kotzinian, A.M. ; Kouznetsov, O.M. ; Koval, A. ; Kral, Z. ; Krinner, F. ; Kulinich, Y. ; Kunne, F. (IRFU, Saclay) ; Kurek, K. ; Kurjata, R.P. ; Kveton, A. ; Lavickova, K. ; Levorato, S. ; Lian, Y.-S. ; Lichtenstadt, J. ; Lin, P.-J. (IRFU, Saclay) ; Longo, R. ; Lyubovitskij, V.E. ; Maggiora, A. ; Magnon, A. ; Makins, N. ; Makke, N. ; Mallot, G.K. ; Maltsev, A. ; Mamon, S.A. ; Marianski, B. ; Martin, A. ; Marzec, J. ; Matousek, J. ; Matsuda, T. ; Mattson, G. ; Meshcheryakov, G.V. ; Meyer, M. (IRFU, Saclay) ; Meyer, W. ; Mikhailov, Yu.V. ; Mikhasenko, M. ; Mitrofanov, E. ; Mitrofanov, N. ; Miyachi, Y. ; Moretti, A. ; Nagaytsev, A. ; Naim, C. (IRFU, Saclay) ; Neyret, D. (IRFU, Saclay) ; Novy, J. ; Nowak, W.-D. ; Nukazuka, G. ; Nunes, A.S. (LIP, Lisbon) ; Olshevsky, A.G. ; Ostrick, M. ; Panzieri, D. ; Parsamyan, B. ; Paul, S. ; Pekeler, H. ; Peng, J.-C. ; Pereira, F. ; Pesek, M. ; Peshekhonov, D.V. ; Peskova, M. ; Pierre, N. (IRFU, Saclay) ; Platchkov, S. (IRFU, Saclay) ; Pochodzalla, J. ; Polyakov, V.A. ; Pretz, J. ; Quaresma, M. ; Quintans, C. ; Ramos, S. ; Reicherz, G. ; Riedl, C. ; Rudnicki, T. ; Ryabchikov, D.I. ; Rybnikov, A. ; Rychter, A. ; Samoylenko, V.D. ; Sandacz, A. ; Sarkar, S. ; Savin, I.A. ; Sbrizzai, G. ; Schmieden, H. ; Selyunin, A. ; Sinha, L. ; Slunecka, M. ; Smolik, J. ; Srnka, A. ; Steffen, D. ; Stolarski, M. ; Subrt, O. ; Sulc, M. ; Suzuki, H. ; Szabelski, A. ; Sznajder, P. ; Tessaro, S. ; Tessarotto, F. ; Thiel, A. ; Tomsa, J. ; Tosello, F. ; Townsend, A. ; Tskhay, V. ; Uhl, S. ; Vasilishin, B.I. ; Vauth, A. ; Veit, B.M. ; Veloso, J. ; Ventura, B. (IRFU, Saclay) ; Vidon, A. (IRFU, Saclay) ; Virius, M. ; Wagner, M. ; Wallner, S. ; Wilfert, M. ; Zaremba, K. ; Zavada, P. ; Zavertyaev, M. ; Zemko, M. ; Zemlyanichkina, E. ; Zhao, Y. ; Ziembicki, M.
Corporate author(s)	The COMPASS collaboration
Publication	2020-07
Imprint	18 Dec 2019
Number of pages	13
Note	13 pages, 7 figures
Published in:	Nucl. Phys. B 956 (2020) 115039
DOI	10.1016/j.nuclphysb.2020.115039
Subject category	Particle Physics - Experiment ; hep-ph ; Particle Physics - Phenomenology ; hep-ex
Accelerator/Facility, Experiment	CERN SPS ; COMPASS
Keywords	QCD ; polarization ; experimental results ; SIDIS ; Transverse Momentum Dependent Parton Distribution Function ; azimuthal asymmetries ; exclusive diffractive processes
Abstract	Hadron leptoproduction in Semi-Inclusive measurements of Deep-Inelastic Scattering (SIDIS) on unpolarised nucleons allows one to get information on the intrinsic transverse momentum of quarks in a nucleon and on the Boer-Mulders function through the measurement of azimuthal modulations in the cross section. These modulations were recently measured by the HERMES experiment at DESY on proton and deuteron targets, and by the COMPASS experiment using the CERN SPS muon beam and a $^6$LiD target. In both cases, the amplitudes of the cos$\phi_h$ and cos$2\phi_h$ modulations show strong kinematic dependences for both positive and negative hadrons. It has been known since some time that the measured final-state hadrons in those SIDIS experiments receive a contribution from exclusive diffractive production of vector mesons, particularly important at large values of z, the fraction of the virtual photon energy carried by the hadron. In previous measurements of azimuthal asymmetries this contribution was not taken into account, because it was not known that it could distort the azimuthal modulations. Presently, a method to evaluate the contribution of the exclusive reactions to the azimuthal asymmetries measured by COMPASS has been developed. The subtraction of this contribution results in a better understanding of the kinematic effects, and the remaining non-zero cos$2\phi_h$ modulation gives indication for a non-zero Boer-Mulders effect.
Other source	Inspire
Copyright/License	publication: © 2020 Published by Elsevier B.V. (License: CC-BY-4.0), sponsored by SCOAP³ preprint: © 2019-2024 CERN (License: arXiv nonexclusive-distrib 1.0)
Submitted by	[email protected]