Journalartikel
Autorenliste: Bashkanov, M.; Watts, D. P.; Kay, S. J. D.; 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.; Guenther, M.; Gurevich, D.; Heijkenskjoeld, L.; Hornidge, D.; Huber, G. M.; Kaeser, 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.; Ron, G.; Sarty, A.; Sfienti, C.; Sokhoyan, V; Spieker, K.; Steffen, O.; Strakovsky, I. I.; Strub, T.; Supek, I; Thiel, A.; Thiel, M.; Thomas, A.; Usov, Yu A.; Wagner, S.; Walford, N. K.; Werthmueller, D.; Wettig, J.; Wolfes, M.; Zachariou, N.; Zana, L. A.
Jahr der Veröffentlichung: 2020
Zeitschrift: Physical Review Letters
Bandnummer: 124
Heftnummer: 13
ISSN: 0031-9007
eISSN: 1079-7114
Open Access Status: Hybrid
DOI Link: https://doi.org/10.1103/PhysRevLett.124.132001
Verlag: American Physical Society
Abstract:
We report a measurement of the spin polarization of the recoiling neutron in deuterium photodisintegration, utilizing a new large acceptance polarimeter within the Crystal Ball at MAMI. The measured photon energy range of 300-700 MeV provides the first measurement of recoil neutron polarization at photon energies where the quark substructure of the deuteron plays a role, thereby providing important new constraints on photodisintegration mechanisms. A very high neutron polarization in a narrow structure centered around E-gamma similar to 570 MeV is observed, which is inconsistent with current theoretical predictions employing nucleon resonance degrees of freedom. A Legendre polynomial decomposition suggests this behavior could be related to the excitation of the d*(2380) hexaquark.
Zitierstile
Harvard-Zitierstil: Bashkanov, M., Watts, D., Kay, S., Abt, S., Achenbach, P., Adlarson, P., et al. (2020) Signatures of the d*(2380) Hexaquark in d(γ,p(n)over-right-arrow), Physical Review Letters, 124(13), Article 132001. https://doi.org/10.1103/PhysRevLett.124.132001
APA-Zitierstil: Bashkanov, M., Watts, D., Kay, S., Abt, S., Achenbach, P., Adlarson, P., Afzal, F., Ahmed, Z., Akondi, C., Annand, J., Arends, H., Beck, R., Biroth, M., Borisov, N., Braghieri, A., Briscoe, W., Cividini, F., Collicott, C., Costanza, S., ...Zana, L. (2020). Signatures of the d*(2380) Hexaquark in d(γ,p(n)over-right-arrow). Physical Review Letters. 124(13), Article 132001. https://doi.org/10.1103/PhysRevLett.124.132001
Schlagwörter
DEUTERON; PHOTODISINTEGRATION; POLARIZED NEUTRONS; RADIATIVE-CAPTURE
