First measurement of polarisation transfer Cx′n in deuteron photodisintegration

Bashkanov, M. et al. (2023) First measurement of polarisation transfer Cx′n in deuteron photodisintegration. Physics Letters B, 844, 138080. (doi: 10.1016/j.physletb.2023.138080)

Abstract

A first measurement of the polarisation transfer from a circularly-polarised photon to the final state neutron (Cn x) in deuterium photodisintegration has been carried out. This quantity is determined over the photon energy range 370 – 700 MeV and for neutron centre-of-mass breakup angles ∼ 45 − 120◦. The polarisation of the final state neutrons was determined by an ancillary large-acceptance nucleon polarimeter, surrounding a cryogenic liquid deuterium target within the Crystal Ball detector at MAMI. The polarimeter characterised (n, p) charge exchange of the ejected neutrons to determine their polarisation. The new Cn x data are also compared to a theoretical model based on nucleonic and nucleon resonance degrees of freedom constrained by the current world-database of deuterium photodisintegration measurements. Structures in Cn x observed in the region of the d∗(2380) could not be explained by conventional models of deuteron photodisintegration.

• Item Type: Articles
• Additional Information: This work has been supported by the U.K. STFC (ST/V002570/1, ST/L00478X/2, ST/V001035/1, ST/P004385/2, ST/T002077/1, ST/L005824/1, 57071/1, 50727/1) grants, the Deutsche Forschungsgemeinschaft (SFB443, SFB/TR16, and SFB1044), DFG-RFBR (Grant No. 09-02-91330), Schweizerischer Nationalfonds (Contracts No. 200020-175807, No. 200020-156983, No. 132799, No. 121781, No. 117601), the U.S. Department of Energy (Offices of Science and Nuclear Physics, Awards No. DE-SC0014323, DEFG02-99-ER41110, No. DE-FG02-88ER40415, No. DEFG02-01-ER41194) and National Science Foundation (Grants NSF OISE-1358175; PHY-1039130, PHY-1714833, No. IIA-1358175), INFN (Italy), and NSERC of Canada (Grant No. FRN-SAPPJ2015-00023).
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Powell, Abby-Rhian and Livingston, Dr Kenneth and Gardner, Mr Simon and MacGregor, Professor Douglas and MULLEN, CHRISTOPHER and Annand, Dr John and Glazier, Dr Derek
• Authors: Bashkanov, M., Watts, D.P., Kay, S., Abt, S., Achenbach, P., Adlarson, P., Afzal, F., Ahmed, Z., Akondi, C.S., Annand, J.R.M., Arends, H.J., Beck, R., Biroth, M., Borisov, N., Braghieri, A., Briscoe, W.J., Cividini, F., Collicott, C., Costanza, S., Denig, A., Downie, E.J., Drexler, P., Fegan, S., Fix, A., Gardner, S., Ghosal, D., Glazier, D.I., Gorodnov, I., Gradl, W., Günther, M., Gurevich, D., Heijkenskjöld, L., Hornidge, D., Huber, G.M., Käser, A., Kashevarov, V.L., Korolija, M., Krusche, B., Lazarev, A., Livingston, K., Lutterer, S., MacGregor, I.J.D., Manley, D.M., Martel, P.P., Miskimen, R., Mornacchi, E., Mullen, C., Neganov, A., Neiser, A., Ostrick, M., Otte, P.B., Paudyal, D., Pedroni, P., Powell, A., Prakhov, S.N., Sokhoyan, V., Spieker, K., Steffen, O., Strakovsky, I.I., Strub, T., Supek, I., Thiel, A., Thiel, M., Thomas, A., Usov, Y.A., Wagner, S., Wettig, J., Wolfes, M., and Zachariou, N.
• Subjects: Q Science > QC Physics
• College/School: College of Science and Engineering > School of Physics and Astronomy
• Research Group: NPE
• Journal Name: Physics Letters B
• Publisher: Elsevier BV
• ISSN: 0370-2693
• ISSN (Online): 1873-2445
• Published Online: 14 July 2023
• Copyright Holders: Copyright © 2023 The Authors
• First Published: First published in Physics Letters B 844:138080
• Publisher Policy: Reproduced under a Creative Commons license
• Data DOI: 10.15124/81153322-7ce4-4c28-9e69-2cbb3651f2e6