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From the same journal

Physical Review Letters (Journal)
Henning Bostelmann (Reviewer)
2020
Activity: Publication peer-review and editorial work › Journal peer review
Physical Review Letters (Journal)
Richard Francis Llewelyn Evans (Reviewer)
2015 → 2016
Activity: Publication peer-review and editorial work › Journal peer review
Physical Review Letters (Journal)
Brian Robert Fulton (Reviewer)
2013
Activity: Publication peer-review and editorial work › Journal peer review
Physical Review Letters (Journal)
Brian Robert Fulton (Reviewer)
2012
Activity: Publication peer-review and editorial work › Journal peer review
Physical Review Letters (Journal)
Mitya Pushkin (Referee)
2011 → 2015
Activity: Publication peer-review and editorial work › Journal peer review

Research output: Contribution to journal › Letter › peer-review

Full text download(s)

PhysRevLett.124.132001
494 KB, PDF document

Published copy (DOI)

10.1103/PhysRevLett.124.132001

Author(s)

A2 Collaboration at MAMI

Department/unit(s)

Physics

Publication details

Journal	Physical Review Letters
Date	Accepted/In press - 2 Mar 2020
Date	Published (current) - 31 Mar 2020
Volume	124
Number of pages	6
Pages (from-to)	1-6
Original language	English

Abstract

We report a measurement of the spin polarisation of the recoiling neutron in deuterium photodisintegration, utilising 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 polarisation 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 polarisation in a narrow structure centred around $E_{\gamma}\sim$~570~MeV is observed, which is inconsistent with current theoretical predictions employing nucleon resonance degrees of freedom. A Legendre polynomial decomposition suggests this behaviour could be related to the excitation of the $d^*(2380)$ hexaquark.

Bibliographical note

Research areas

nucl-ex

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