Measurement of the tensor analyzing power T20 for incoherent π− photoproduction on a deuteron above the first resonance region

Autor: V.V. Gauzshtein, E.M. Darwish, A.I. Fix, M.Ya. Kuzin, M.I. Levchuk, A.Yu. Loginov, D.M. Nikolenko, I.A. Rachek, Yu.V. Shestakov, D.K. Toporkov, A.V. Yurchenko, B.I. Vasilishin, S.A. Zevakov, G.N. Baranov, A.V. Bogomyagkov, V.M. Borin, D.V. Dorokhova, V.L. Dorokhov, A.N. Zhuravlev, S.E. Karnaev, K.Yu. Karyukina, A.A. Kovalenko, V.N. Kudryavtsev, E.B. Levichev, I.B. Logashenko, T.V. Maltsev, R.Z. Mamutov, I.A. Morozov, I.N. Okunev, P.A. Piminov, L.I. Shekhtman, E.A. Simonov, S.V. Sinyatkin, M.A. Skamarokha, E.V. Starostina
Jazyk: angličtina
Rok vydání: 2025
Předmět:
Zdroj: Physics Letters B, Vol 860, Iss , Pp 139166- (2025)
Druh dokumentu: article
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2024.139166
Popis: New measurements of the T20 component of tensor analyzing power in the reaction γd→ppπ− for photon energies 400−700 MeV are presented. The experiment was carried out on an internal tensor-polarized gas deuterium target of the VEPP-3 electron storage ring in 2023 with the use of tagged quasi-real photons and two-proton coincidence. For determination of T20, the asymmetry caused by a change of the sign of the tensor polarization of the deuteron target was measured. The new data are compared with the results of theoretical calculations based on the quasi-free approximation including πN and NN rescattering effects.
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