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Measurement of the tensor analyzing power \(T_{20}\) for the reaction \(\gamma d \rightarrow d\pi ^0\)

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Abstract

We present the first accurate results of measurements of the tensor analyzing power component \(T_{20}\) for the coherent neutral pion photoproduction on the deuteron. The measurements were performed at the Budker Institute of Nuclear Physics at VEPP-3 storage ring using the internal tensor polarized deuterium target. The measurements cover the region of photon energy from 200 to 450 MeV and the region of the center-of-mass pion polar angle from 100 to 140 degrees. The results obtained are compared with predictions of several theoretical models.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: There are no external data associated with the manuscript.]

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Acknowledgements

The analysis of the experimental data was carried out at Tomsk Polytechnic University within the framework of Tomsk Polytechnic University Competitiveness Enhancement Program Grant and the Russian Federation program “Nauka” (Contract No. FSWW-2020-0008).

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Correspondence to V. V. Gauzshtein.

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Communicated by Carlos Munoz Camacho

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Gauzshtein, V.V., Darwish, E.M., Kuzin, M.Y. et al. Measurement of the tensor analyzing power \(T_{20}\) for the reaction \(\gamma d \rightarrow d\pi ^0\). Eur. Phys. J. A 56, 169 (2020). https://doi.org/10.1140/epja/s10050-020-00175-z

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  • DOI: https://doi.org/10.1140/epja/s10050-020-00175-z

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