Preprint
Tensor analyzing power $T_{20}$ in the reaction $\gamma \vec{d}\to pn$ at photon energies 350-680 MeV
V. Gauzshtein
A. Fix
V. Ivanov
D. Nikolenko
I. Rachek
Y. Shestakov
D. Toporkov
A. Yurchenko
S. Zevakov
G. Baranov
A. Bogomyagkov
V. Borin
E. Darwish
D. Dorokhova
V. Dorokhov
S. Karnaev
A. Kovalenko
V. N. Kudryavtsev
M. Levchuk
E. Levichev
I. Logashenko
A. Loginov
T. Maltsev
R. Z. Mamutov
I. Okunev
P. Piminov
L. Shekhtman
E. Simonov
S. Sinyatkin
M. Skamarokha
E. Starostina
I. Ulev
A. Zhuravlev
Aug 2026 · 0 citations
Physics
Abstract
We present measurements of the tensor analyzing power $T_{20}$ in the reaction $\gamma {d}\to pn$ at photon energies $E_\gamma = 350$-$680$~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 $\Theta_p = 70^\circ$-$102^\circ$. 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.