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Tensor analyzing power T20 in the reaction γd pn at photon energies 350-680 MeV

V. V. Gauzshtein, A. I. Fix, V. I. Ivanov, D. M. Nikolenko, I. A. Rachek, Yu. V. Shestakov, D. K. Toporkov, A. V. Yurchenko, S. A. Zevakov, G. N. Baranov, A. V. Bogomyagkov, V. M. Borin, E. M. Darwish, D. V. Dorokhova, V. L. Dorokhov, S. E. Karnaev, A. A. Kovalenko, V. N. Kudryavtsev, M. I. Levchuk, E. B. Levichev, I. B. Logashenko, A. Yu. Loginov, T. V. Maltsev, R. Z. Mamutov, I. N. Okunev, P. A. Piminov, L. I. Shekhtman, E. A. Simonov, S. V. Sinyatkin, M. A. Skamarokha, E. V. Starostina, I. A. Ulev, A. N. Zhuravlev

nucl-exarXiv:2608.09169

Abstract

We present measurements of the tensor analyzing power T20 in the reaction γd pn at photon energies Eγ= 350-680~MeV. The experiment was performed at the VEPP-3 storage ring using an internal tensor-polarized deuterium gas target and a tagged quasi-real photon beam. The data were obtained for proton emission angles Θp = 70-102. Comparison with modern meson-baryon calculations shows generally satisfactory agreement within the present uncertainties. A theoretical analysis of an extended data set, covering the energy range from threshold to 680~MeV and including both the new data and the previous results from 2007, is presented.

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