Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering
G. D. Alexeev,M. G. Alexeev,C. Alice,A. Amoroso,V. Andrieux,V. Anosov,K. Augsten,W. Augustyniak,C. D. R. Azevedo,B. Badelek,J. Barth,R. Beck,Y. Bedfer,J. Bernhard,M. Bodlak,F. Bradamante,C. Braun,A. Bressan,V. E. Burtsev,W. -c. Chang,C. Chatterjee,M. Chiosso,A. G. Chumakov,S. -u. Chung,A. Cicuttin,P. M. M. Correia,M. L. Crespo,D. D'Ago,S. Dalla Torre,S. S. Dasgupta,S. Dasgupta,F. Del Carro,I. Denisenko,O. Yu. Denisov,S. V. Donskov,N. Doshita,Ch. Dreisbach,W. Duennweber,R. R. Dusaev,D. Ecker,A. Efremov,C. Elia,D. Eremeev,P. Faccioli,M. Faessler,M. Finger,H. Fischer,K. J. Floethner,W. Florian,J. M. Friedrich,V. Frolov,L. G. Garcia Ordonez,F. Gautheron,O. P. Gavrichtchouk,S. Gerassimov,J. Giarra,D. Giordano,M. Gorzellik,A. Grasso,A. Gridin,M. Grosse Perdekamp,B. Grube,M. Gruener,A. Guskov,D. von Harrach,M. Hoffmann,N. Horikawa,N. d'Hose,C. -y. Hsieh,S. Huber,S. Ishimoto,A. Ivanov,T. Iwata,M. Jandek,V. Jary,R. Joosten,E. Kabuss,F. Kaspar,A. Kerbizi,B. Ketzer,A. Khatun,G. V. Khaustov,F. Klein,J. H. Koivuniemi,V. N. Kolosov,K. Kondo Horikawa,I. Konorov,V. F. Konstantinov,A. M. Korzenev,A. M. Kotzinian,O. M. Kouznetsov,A. Koval,Z. Kral,F. Krinner,F. Kunne,K. Kurek,R. P. Kurjata,A. Kveton,K. Lavickova,S. Levorato,Y. -s. Lian,J. Lichtenstadt,P. -j. Lin,R. Longo,V. E. Lyubovitskij,A. Maggiora,A. Magnon,N. Makins,N. Makke,G. K. Mallot,A. Maltsev,S. A. Mamon,A. Martin,J. Matousek,T. Matsuda,G. Mattson,C. Menezes Pires,F. Metzger,M. Meyer,W. Meyer,Yu. V. Mikhailov,M. Mikhasenko,E. Mitrofanov,D. Miura,Y. Miyachi,R. Molina,A. Moretti,A. Nagaytsev,D. Neyret,M. Niemiec,J. Novy,W. -d. Nowak,G. Nukazuka,A. G. Olshevsky,M. Ostrick,D. Panzieri,B. Parsamyan,S. Paul,H. Pekeler,J. -c. Peng,G. Pesaro,M. Pesek,D. V. Peshekhonov,M. Peskova,S. Platchkov,J. Pochodzalla,V. A. Polyakov,M. Quaresma,C. Quintans,G. Reicherz,C. Riedl,D. I. Ryabchikov,A. Rychter,A. Rymbekova,V. D. Samoylenko,A. Sandacz,S. Sarkar,I. A. Savin,G. Sbrizzai,P. Schiavon,H. Schmieden,A. Selyunin,K. Sharko,L. Sinha,M. Slunecka,F. Sozzi,D. Spuelbeck,A. Srnka,M. Stolarski,O. Subrt,M. Sulc,H. Suzuki,S. Tessaro,F. Tessarotto,A. Thiel,J. Tomsa,F. Tosello,A. Townsend,T. Triloki,V. Tskhay,B. Valinoti,B. M. Veit,B. Ventura,M. Virius,M. Wagner,K. Zaremba,M. Zavertyaev,M. Zemko,E. Zemlyanichkina,M. Ziembicki
PHYSICS LETTERS B（2023）
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摘要
A set of measurements of azimuthal asymmetries in the production of pairs of identified hadrons in deep-inelastic scattering of muons on transversely polarised (LiD)-Li-6 (deuteron) and NH3 (proton) targets is presented. All available data collected in the years 2003-2004 and 2007/2010 with the COMPASS spectrometer using a muon beam of 160GeV/c at the CERN SPS were analysed. The asymmetries provide access to the transversity distribution functions via a fragmentation function that in principle may be independently obtained from e(+)e(-) annihilation data. Results are presented, discussed and compared to existing measurements as well as to model predictions. Asymmetries of pi(+)pi(-) pairs measured with the proton target as a function of the Bjorken scaling variable are sizeable in the range x>0.032, indicating non-vanishing transversity distribution and di-hadron interference fragmentation functions. As already pointed out by several authors, the small asymmetries of pi(+)pi(-) measured on the (LiD)-Li-6 target can be interpreted as indication for a cancellation of u and d-quark transversity distributions. (c) 2023 Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
