Azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic lepton scattering by transversely polarized protons

Airapetian, A.; Akopov, N.; Akopov, Z.; Aschenauer, E. C.; Augustyniak, W.; Avakian, R.; Bacchetta, A.; Belostotski, S.; Bryzgalov, V.; Capitani, G. P.; Cisbani, E.; Ciullo, G.; Contalbrigo, M.; Deconinck, W.; De Leo, R.; De Sanctis, E.; Diefenthaler, M.; Di Nezza, P.; Düren, M.; Elbakian, G.; Ellinghaus, F.; Fantoni, A.; Felawka, L.; Gavrilov, G.; Gharibyan, V.; Hasch, D.; Holler, Y.; Ivanilov, A.; Jackson, H. E.; Joosten, S.; Kaiser, R.; Karyan, G.; Kinney, E.; Kisselev, A.; Kozlov, V.; Kravchenko, P.; Lagamba, L.; Lapikás, L.; Lehmann, I.; Lenisa, P.; Lorenzon, W.; Manaenkov, S. I.; Marianski, B.; Marukyan, H.; Miyachi, Y.; Movsisyan, A.; Muccifora, V.; Naryshkin, Y.; Nass, A.; Nazaryan, G.; Nowak, W. -D.; Pappalardo, L. L.; Reimer, P. E.; Reolon, A. R.; Riedl, C.; Rith, K.; Rosner, G.; Rostomyan, A.; Rubin, J.; Ryckbosch, D.; Schäfer, A.; Schnell, G.; Seitz, B.; Shibata, T. -A.; Shutov, V.; Statera, M.; Terkulov, A.; Tytgat, M.; Van Haarlem, Y.; Van Hulse, C.; Veretennikov, D.; Vilardi, I.; Yaschenko, S.; Zeiler, D.; Zihlmann, B.; Zupranski, P.

doi:10.1007/jhep12(2020)010

Title: Azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic lepton scattering by transversely polarized protons

Journal Article · Wed Dec 02 00:00:00 EST 2020 · Journal of High Energy Physics (Online)

DOI:https://doi.org/10.1007/jhep12(2020)010· OSTI ID:1797786

Airapetian, A.; Akopov, N.; Akopov, Z.; Aschenauer, E. C.; Augustyniak, W.; Avakian, R.; Bacchetta, A.; Belostotski, S.; Bryzgalov, V.; Capitani, G. P.; Cisbani, E.; Ciullo, G.; Contalbrigo, M.; Deconinck, W.; De Leo, R.; De Sanctis, E.; Diefenthaler, M.; Di Nezza, P.; Düren, M.; Elbakian, G. more »

A comprehensive set of azimuthal single-spin and double-spin asymmetries in semi-inclusive leptoproduction of pions, charged kaons, protons, and antiprotons from transversely polarized protons is presented. These asymmetries include the previously published HERMES results on Collins and Sivers asymmetries, the analysis of which has been extended to include protons and antiprotons and also to an extraction in a three-dimensional kinematic binning and enlarged phase space. They are complemented by corresponding results for the remaining four single-spin and four double-spin asymmetries allowed in the one-photon-exchange approximation of the semi-inclusive deep-inelastic scattering process for target-polarization orientation perpendicular to the direction of the incoming lepton beam. Among those results, significant non-vanishing cos (Φ–Φ_S) modulations provide evidence for a sizable worm-gear (II) distribution, $${g}_{1\mathrm{T}}^q\left(x,{\mathrm{p}}_T^2\right)$$. Most of the other modulations are found to be consistent with zero with the notable exception of large sin (Φ_S) modulations for charged pions and K⁺.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Nuclear Physics (NP)

Contributing Organization:: The HERMES Collaboration

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1797786

Journal Information:: Journal of High Energy Physics (Online), Vol. 2020, Issue 12; ISSN 1029-8479

Publisher:: Springer BerlinCopyright Statement

Country of Publication:: United States

Language:: English

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