CERN Accelerating science

Article
Report number	arXiv:2104.13585 ; CERN-EP-2021-072
Title	Probing transversity by measuring $\Lambda$ polarisation in SIDIS
Author(s)	Alexeev, M.G. ; Alexeev, G.D. (Dubna, JINR) ; Amoroso, A. ; Andrieux, V. ; Anosov, V. (Dubna, JINR) ; Augsten, K. ; Augustyniak, W. (NCBJ, Warsaw) ; Azevedo, C.D.R. (Aveiro U.) ; Badełek, B. (Warsaw U.) ; Balestra, F. ; Ball, M. (Bonn U., HISKP) ; Barth, J. (Bonn U., HISKP) ; Beck, R. (Bonn U., HISKP) ; Bedfer, Y. (IRFU, Saclay) ; Antequera, J. Berenguer ; Bernhard, J. ; Bodlak, M. (Charles U.) ; Bradamante, F. (INFN, Trieste) ; Bressan, A. ; Burtsev, V.E. (Tomsk Polytechnic U.) ; Chang, W.-C. (Taiwan, Inst. Phys.) ; Chatterjee, C. ; Chiosso, M. ; Chumakov, A.G. (Tomsk Polytechnic U.) ; Chung, S.-U. (Munich, Tech. U. ; Pusan Natl. U. ; BNL, NSLS) ; Cicuttin, A. (INFN, Trieste ; ICTP, Trieste) ; Correia, P.M.M. (Aveiro U.) ; Crespo, M.L. (INFN, Trieste ; ICTP, Trieste) ; D'Ago, D. ; Dalla Torre, S. (INFN, Trieste) ; Dasgupta, S.S. (Matrivani Inst., Calcutta) ; Dasgupta, S. (INFN, Trieste) ; Denisenko, I. (Dubna, JINR) ; Denisov, O.Yu. (INFN, Turin) ; Donskov, S.V. (Serpukhov, IHEP) ; Doshita, N. (Yamagata U.) ; Dreisbach, Ch. (Munich, Tech. U.) ; Duennweber, W. ; Dusaev, R.R. (Tomsk Polytechnic U.) ; Efremov, A. (Dubna, JINR) ; Eversheim, P.D. (Bonn U., HISKP) ; Faccioli, P. (LIP, Lisbon) ; Faessler, M. ; Ferrero, A. (IRFU, Saclay) ; Finger, M. (Charles U.) ; Fischer, H. (Freiburg U.) ; Franco, C. (LIP, Lisbon) ; Friedrich, J.M. (Munich, Tech. U.) ; Frolov, V. ; Ordonez, L.G. Garcia ; Gautheron, F. ; Gavrichtchouk, O.P. (Dubna, JINR) ; Gerassimov, S. ; Giarra, J. (Mainz U., Inst. Kernphys.) ; Gnesi, I. ; Giordano, D. (Turin U.) ; Gorzellik, M. (Freiburg U. ; Heidelberg U.) ; Olshevsky, A.G. (Dubna, JINR) ; Gridin, A. (Dubna, JINR) ; Grosse Perdekamp, M. (Illinois U., Urbana) ; Grube, B. (Munich, Tech. U.) ; Guskov, A. (Dubna, JINR) ; von Harrach, D. (Mainz U., Inst. Kernphys.) ; Heitz, R. (Illinois U., Urbana) ; Horikawa, N. (Chukyo U. ; Chubu U.) ; d'Hose, N. (IRFU, Saclay) ; Hsieh, C.-Y. (Taiwan, Inst. Phys. ; NCTS, Hsinchu) ; Huber, S. (Munich, Tech. U.) ; Ishimoto, S. (Yamagata U. ; KEK, Tsukuba) ; Ivanov, A. (Dubna, JINR) ; Iwata, T. (Yamagata U.) ; Jandek, M. (CTU, Prague) ; Jary, V. (CTU, Prague) ; Joosten, R. (Bonn U., HISKP) ; Kabuß, E. (Mainz U., Inst. Kernphys.) ; Kang, D.-H. (Mainz U., Inst. Kernphys.) ; Kaspar, F. (Munich, Tech. U.) ; Kerbizi, A. ; 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. ; Kolosov, V.N. (Serpukhov, IHEP) ; Konorov, I. ; Konstantinov, V.F. (Serpukhov, IHEP) ; Kotzinian, A.M. (INFN, Turin ; Yerevan Phys. Inst.) ; Kouznetsov, O.M. (Dubna, JINR) ; Koval, A. (NCBJ, Warsaw) ; Kral, Z. (Charles U.) ; Krinner, F. (Munich, Tech. U.) ; Kulinich, Y. (Illinois U., Urbana) ; Kunne, F. (IRFU, Saclay) ; Kurek, K. (NCBJ, Warsaw) ; Kurjata, R.P. (Warsaw U. of Tech.) ; Kveton, A. (Charles U.) ; Lavickova, K. (CTU, Prague) ; Levorato, S. ; Lian, Y.-S. (Taiwan, Inst. Phys. ; Taiwan, Natl. Kaohsiung Normal U.) ; Lichtenstadt, J. (Tel Aviv U.) ; Lin, P.-J. (IRFU, Saclay) ; Longo, R. (Illinois U., Urbana) ; Lyubovitskij, V.E. (Tomsk Polytechnic U. ; Giessen U.) ; Maggiora, A. (INFN, Turin) ; Magnon, A. ; Makins, N. (Illinois U., Urbana) ; Makke, N. (INFN, Trieste ; ICTP, Trieste) ; Mallot, G.K. ; Maltsev, A. (Dubna, JINR) ; Mamon, S.A. (Tomsk Polytechnic U.) ; Marianski, B. (NCBJ, Warsaw) ; Martin, A. ; Marzec, J. (Warsaw U. of Tech.) ; Finger, Jr.M. (Charles U.) ; Matsuda, T. (Miyazaki U.) ; Mattson, G. (Illinois U., Urbana) ; Meshcheryakov, G.V. (Dubna, JINR) ; Meyer, M. ; Meyer, W. (Ruhr U., Bochum, Inst. Expt. Phys.) ; Mikhailov, Yu.V. (Serpukhov, IHEP) ; Mikhasenko, M. ; Mitrofanov, E. (Dubna, JINR) ; Miyachi, Y. (Yamagata U.) ; Moretti, A. ; Nagaytsev, A. (Dubna, JINR) ; Naim, C. (IRFU, Saclay) ; Negrini, T.S. (Bonn U., HISKP) ; Neyret, D. (IRFU, Saclay) ; Nový, J. (CTU, Prague) ; Nowak, W.-D. (Mainz U., Inst. Kernphys.) ; Nukazuka, G. (Yamagata U.) ; Nunes, A.S. (LIP, Lisbon ; BNL, NSLS) ; Olshevskiy, A.G. ; Ostrick, M. (Mainz U., Inst. Kernphys.) ; Panzieri, D. (INFN, Turin ; Turin U., Alessandria) ; Parsamyan, B. ; Paul, S. (Munich, Tech. U.) ; Pekeler, H. (Bonn U., HISKP) ; Peng, J.-C. (Illinois U., Urbana) ; Pešek, M. (Charles U.) ; Peshekhonov, D.V. (Dubna, JINR) ; Pešková, M. (Charles U.) ; Pierre, N. ; Platchkov, S. (IRFU, Saclay) ; Pochodzalla, J. (Mainz U., Inst. Kernphys.) ; Polyakov, V.A. (Serpukhov, IHEP) ; Pretz, J. (Bonn U. ; JARA, Aachen) ; Quaresma, M. ; Quintans, C. (LIP, Lisbon) ; Reicherz, G. (Ruhr U., Bochum, Inst. Expt. Phys.) ; Riedl, C. (Illinois U., Urbana) ; Rudnicki, T. (Warsaw U.) ; Ryabchikov, D.I. ; Rymbekova, A. (Dubna, JINR) ; Rychter, A. (Warsaw U. of Tech.) ; Samoylenko, V.D. (Serpukhov, IHEP) ; Sandacz, A. (NCBJ, Warsaw) ; Sarkar, S. (Matrivani Inst., Calcutta) ; Savin, I.A. (Dubna, JINR) ; Sbrizzai, G. ; Schiavon, P. ; Schmieden, H. (Bonn U.) ; Selyunin, A. (Dubna, JINR) ; Sharko, K. (Tomsk Polytechnic U.) ; Sinha, L. (Matrivani Inst., Calcutta) ; Slunecka, M. (Charles U.) ; Smolik, J. (Dubna, JINR) ; Sozzi, F. (INFN, Trieste) ; Srnka, A. (Inst. Sci. Instruments, Brno) ; Steffen, D. ; Stolarski, M. (LIP, Lisbon) ; Subrt, O. ; Sulc, M. (Liberec Tech. U.) ; Suzuki, H. (Yamagata U. ; Chubu U.) ; Sznajder, P. (NCBJ, Warsaw) ; Tessaro, S. (INFN, Trieste) ; Tessarotto, F. ; Thiel, A. (Bonn U., HISKP) ; Tomsa, J. (Charles U.) ; Tosello, F. (INFN, Turin) ; Townsend, A. (Illinois U., Urbana) ; Tskhay, V. (Lebedev Inst.) ; Uhl, S. (Munich, Tech. U.) ; Vauth, A. ; Veit, B.M. ; Veloso, J. (Aveiro U.) ; Ventura, B. (IRFU, Saclay) ; Vidon, A. (IRFU, Saclay) ; Virius, M. (CTU, Prague) ; Wagner, M. (Bonn U., HISKP) ; Wallner, S. (Munich, Tech. U.) ; Zaremba, K. (Warsaw U. of Tech.) ; Zavada, P. (Dubna, JINR) ; Zavertyaev, M. (Lebedev Inst.) ; Zemko, M. ; Zemlyanichkina, E. (Dubna, JINR) ; Zhao, Y. (INFN, Trieste) ; Ziembicki, M. (Warsaw U. of Tech.)
Corporate author(s)	The COMPASS collaboration
Publication	2022-01-10
Collaboration	COMPASS
Imprint	27 Apr 2021
Number of pages	18
Note	18 pages, 6 figures
Published in:	Phys. Lett. B
DOI	10.1016/j.physletb.2021.136834 10.1016/j.physletb.2021.136834
Subject category	Particle Physics - Experiment
Accelerator/Facility, Experiment	CERN SPS ; COMPASS
Keywords	QCD ; polarization ; experimental results ; SIDIS ; Lambda ; Transverse
Abstract	Based on the observation of sizeable target-transverse-spin asymmetries in single-hadron and hadron-pair production in Semi-Inclusive measurements of Deep Inelastic Scattering (SIDIS), the chiral-odd transversity quark distribution functions $h_1^q$ are nowadays well established. Several possible channels to access these functions were originally proposed. One candidate is the measurement of the polarisation of $\Lambda$ hyperons produced in SIDIS off transversely polarised nucleons, where the transverse polarisation of the struck quark might be transferred to the final-state hyperon. In this article, we present the COMPASS results on the transversity-induced polarisation of $\Lambda$ and $\bar{\Lambda}$ hyperons produced in SIDIS off transversely polarised protons. Within the experimental uncertainties, no significant deviation from zero was observed. The results are discussed in the context of different models taking into account previous experimental results on $h_1^u$ and $h_1^d$.
Other source	Inspire
Copyright/License	publication: (License: CC-BY-4.0), sponsored by SCOAP³ Preprint: © 2021-2025 CERN (License: CC-BY-4.0)
Submitted by	[email protected]