| Title: |
Transverse-spin-dependent azimuthal asymmetries of pion and kaon pairs produced in muon-proton and muon-deuteron semi-inclusive deep inelastic scattering |
| Authors: |
Alexeev, Gennady; Alexeev, Maxim; Alice, Chiara; Amoroso, Antonio; Andrieux, Vincent; Anosov, Vladimir; Augsten, Kamil; Augustyniak, W.; Azevedo, Carlos; B.; Badelek, Barbara; Barth, Jens; Beck, R.; Bedfer, Yann; Bernhard, Johannes; Bodlak, M.; Bradamante, Franco; Braun, C.; Bressan, Andrea; Burtsev, V.E.; Chang, Wen-Chen; Chatterjee, Chandradoy; Chiosso, Michela; Chumakov, A.G.; Chung, S.-U.; Cicuttin, Andres; Correia, Pedro; Crespo, Maria Liz; D, M. Faessler d.; D'Ago, Daniele; d'Hose, Nicole; Dalla Torre, Silvia; Dasgupta, S.; Delcarro, Filippo; Denisenko, Igor; Denisov, Oleg; Donskov, Sergey; Doshita, Norihiro; Dreisbach, Christian; Dünnweber, Wolfgang; Dusaev, Renat; Ecker, Dominik; Efremov, Maxim; Elia, C.; Eremeev, D.; Faccioli, Pietro; Finger, M.; Finger, Miroslav; Fischer, H.; Florian, W.; Flöthner, Karl Jonathan; Friedrich, Jan Michael; Frolov, V.N.; Gautheron, F.; Gavrichtchouk, O.P.; Gerassimov, Sergei; Giarra, Johannes; Giordano, Davide; Gorzellik, Matthias; Grasso, Antonino; Gridin, Andrei; Grosse Perdekamp, Matthias; Grube, Boris; Grüner, Marcus; Guskov, Alexey; |
| Source: |
Phys.Lett.B, 845(2023), 138155, (2023-08-29) |
| Publisher Information: |
Elsevier B.V. |
| Publication Year: |
2023 |
| Collection: |
Istituto Nazionale di Fisica Nucleare (INFN): Open Access Repository |
| Subject Terms: |
SIDIS; Di-hadron; Spin; Fragmentation; Transversity; Collins effect; angular distribution: asymmetry; scaling: Bjorken; fragmentation function: interference; muon: beam; muon deuteron: semi-inclusive reaction; deep inelastic scattering: semi-inclusive reaction; p: target; hadron hadron: interference; deuteron; annihilation; COMPASS; spectrometer; distribution function; CERN SPS; experimental results; High Energy Physics - Experiment |
| Description: |
A set of measurements of azimuthal asymmetries in the production of pairs of identified hadrons in deep-inelastic scattering of muons on transversely polarised 6 LiD (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 6 LiD target can be interpreted as indication for a cancellation of u and d-quark transversity distributions. |
| Document Type: |
article in journal/newspaper |
| Language: |
English |
| Relation: |
https://arxiv.org/pdf/2301.02013; https://www.openaccessrepository.it/communities/inspire-hep; https://doi.org/10.1016/j.physletb.2023.138155; https://inspirehep.net/literature/2620635 |
| DOI: |
10.1016/j.physletb.2023.138155 |
| Availability: |
https://doi.org/10.1016/j.physletb.2023.138155; https://inspirehep.net/literature/2620635 |
| Rights: |
info:eu-repo/semantics/openAccess ; Creative Commons Attribution 4.0 International ; https://creativecommons.org/licenses/by/4.0/ |
| Accession Number: |
edsbas.4A80B7F3 |
| Database: |
BASE |