학술논문
Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering
Document Type
article
Author
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. Dünnweber; R.R. Dusaev; D. Ecker; A. Efremov; C. Elia; D. Eremeev; P. Faccioli; M. Faessler; M. Finger; M. Finger, jr.; H. Fischer; K.J. Flöthner; W. Florian; J.M. Friedrich; V. Frolov; L.G. Garcia Ordòñez; F. Gautheron; O.P. Gavrichtchouk; S. Gerassimov; J. Giarra; D. Giordano; M. Gorzellik; A. Grasso; A. Gridin; M. Grosse Perdekamp; B. Grube; M. Grüner; 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. Marzec; J. Matoušek; 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. Nový; W.-D. Nowak; G. Nukazuka; A.G. Olshevsky; M. Ostrick; D. Panzieri; B. Parsamyan; S. Paul; H. Pekeler; J.-C. Peng; G. Pesaro; M. Pešek; D.V. Peshekhonov; M. Pešková; 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. Spülbeck; 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; J.F.C.A. Veloso; B. Ventura; M. Virius; M. Wagner; S. Wallner; K. Zaremba; M. Zavertyaev; M. Zemko; E. Zemlyanichkina; M. Ziembicki
Source
Physics Letters B, Vol 845, Iss , Pp 138155- (2023)
Subject
Language
English
ISSN
0370-2693
Abstract
A set of measurements of azimuthal asymmetries in the production of pairs of identified hadrons in deep-inelastic scattering of muons on transversely polarised 6LiD (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 π+π− 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 π+π− measured on the 6LiD target can be interpreted as indication for a cancellation of u and d-quark transversity distributions.