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arXiv · 1809.09398

Deuteron photodisintegration by polarized photons in the region of the $d^*(2380)$

M. Bashkanov·S. Kay·D. P. Watts·C. Mullen·S. Abt·P. Achenbach·P. Adlarson·F. Afzal·Z. Ahmed·C. S. Akondi·J. R. M. Annand·H. J. Arends·R. Beck·M. Biroth·N. Borisov·A. Braghieri·W. J. Briscoe·F. Cividini·C. Collicott·S. Costanza·A. Denig·E. J. Downie·P. Drexler·S. Garni·D. I. Glazier·I. Gorodnov·W. Gradl·M. Günther·D. Gurevich·L. Heijkenskjöld·D. Hornidge·G. M. Huber·A. Käser·V. L. Kashevarov·M. Korolija·B. Krusche·A. Lazarev·K. Livingston·S. Lutterer·I. J. D. MacGregor·R. Macrae·D. M. Manley·P. P. Martel·R. Miskimen·E. Mornacchi·A. Neganov·A. Neiser·M. Ostrick·P. B. Otte·D. Paudyal·P. Pedroni·A. Powell·S. N. Prakhov·G. Ron·T. Rostomyan·A. Sarty·C. Sfienti·V. Sokhoyan·K. Spieker·O. Steffen·I. I. Strakovsky·T. Strub·I. Supek·A. Thiel·M. Thiel·A. Thomas·Yu. A. Usov·S. Wagner·N. K. Walford·D. Werthmüller·J. Wettig·M. Wolfes·L. A. Zana
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Abstract

We report the first large-acceptance measurement of the beam-spin asymmetry for deuteron photodisintegration ($\vec{\gamma} d\to pn$) in the photon energy range $400<E_{\gamma}<630$~MeV. The measurement provides important new constraints on the mechanisms of photodisintegration above the delta resonance and on the photocoupling of the recently discovered $d^*(2380)$ hexaquark.

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M. Bashkanov, S. Kay, D. P. Watts, C. Mullen, S. Abt, P. Achenbach, P. Adlarson, F. Afzal, Z. Ahmed, C. S. Akondi, J. R. M. Annand, H. J. Arends, R. Beck, M. Biroth, N. Borisov, A. Braghieri, W. J. Briscoe, F. Cividini, C. Collicott, S. Costanza, A. Denig, E. J. Downie, P. Drexler, S. Garni, D. I. Glazier, I. Gorodnov, W. Gradl, M. Günther, D. Gurevich, L. Heijkenskjöld, D. Hornidge, G. M. Huber, A. Käser, V. L. Kashevarov, M. Korolija, B. Krusche, A. Lazarev, K. Livingston, S. Lutterer, I. J. D. MacGregor, R. Macrae, D. M. Manley, P. P. Martel, R. Miskimen, E. Mornacchi, A. Neganov, A. Neiser, M. Ostrick, P. B. Otte, D. Paudyal, P. Pedroni, A. Powell, S. N. Prakhov, G. Ron, T. Rostomyan, A. Sarty, C. Sfienti, V. Sokhoyan, K. Spieker, O. Steffen, I. I. Strakovsky, T. Strub, I. Supek, A. Thiel, M. Thiel, A. Thomas, Yu. A. Usov, S. Wagner, N. K. Walford, D. Werthmüller, J. Wettig, M. Wolfes, L. A. Zana. 2018-09-25. Deuteron photodisintegration by polarized photons in the region of the $d^*(2380)$. https://doi.org/10.1016/j.physletb.2018.12.026

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