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

A comprehensive set of azimuthal single-spin and double-spin asymmetriesin semi-inclusive leptoproduction of pions, charged kaons, protons, and antiprotons fromtransversely polarized protons is presented. These asymmetries include the previouslypublishedHERMESresults on Collins and Sivers asymmetries, the analysis of which hasbeen extended to include protons and antiprotons and also to an extraction in a three-dimensional kinematic binning and enlarged phase space. They are complemented bycorresponding results for the remaining four single-spin and four double-spin asymme-tries allowed in the one-photon-exchange approximation of the semi-inclusive deep-inelasticscattering process for target-polarization orientation perpendicular to the direction of theincoming lepton beam. Among those results, significant non-vanishingcos (φ−φS)modu-lations provide evidence for a sizable worm-gear (II) distribution,gq1T(x,p2T). Most of theother modulations are found to be consistent with zero with the notable exception of largesin (φS)modulations for charged pions andK+.

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Data di pubblicazione:	2020
Titolo:	Azimuthal single- and double-spin asymmetries in semi-inclusive deep-inelastic lepton scattering by transversely polarized protons
Autori:	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.
Rivista:	JOURNAL OF HIGH ENERGY PHYSICS
Keywords:	Transverse Momentum Partons Fixed target experiments Polarization QCD
Parole Chiave:	Gluons
Abstract in inglese:	A comprehensive set of azimuthal single-spin and double-spin asymmetriesin semi-inclusive leptoproduction of pions, charged kaons, protons, and antiprotons fromtransversely polarized protons is presented. These asymmetries include the previouslypublishedHERMESresults on Collins and Sivers asymmetries, the analysis of which hasbeen extended to include protons and antiprotons and also to an extraction in a three-dimensional kinematic binning and enlarged phase space. They are complemented bycorresponding results for the remaining four single-spin and four double-spin asymme-tries allowed in the one-photon-exchange approximation of the semi-inclusive deep-inelasticscattering process for target-polarization orientation perpendicular to the direction of theincoming lepton beam. Among those results, significant non-vanishingcos (φ−φS)modu-lations provide evidence for a sizable worm-gear (II) distribution,gq1T(x,p2T). Most of theother modulations are found to be consistent with zero with the notable exception of largesin (φS)modulations for charged pions andK+.
Digital Object Identifier (DOI):	10.1007/JHEP12(2020)010
Handle:	http://hdl.handle.net/11392/2432556
Appare nelle tipologie:	03.1 Articolo su rivista

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