Bulletin of the American Physical Society
Fall 2022 Meeting of the APS Division of Nuclear Physics
Volume 67, Number 17
Thursday–Sunday, October 27–30, 2022; Time Zone: Central Daylight Time, USA; New Orleans, Louisiana
Session PC: Hadronic Physics VI
10:30 AM–12:18 PM,
Sunday, October 30, 2022
Hyatt Regency Hotel
Room: Celestin A
Chair: Ramona Vogt, LLNL/UC Davis
Abstract: PC.00009 : Extracting neutron polarization observables using the CLAS start counter*
12:06 PM–12:18 PM
Presenter:
William D Booth
(University of York)
Authors:
Mihai Mocanu
(University of York)
Mikhail Bashkanov
(University of York)
Daniel Watts
(University of York)
William D Booth
(University of York)
Collaboration:
A2@MAMI Collaboration
CLAS was a many-component detector housed in Hall B of Jefferson Lab, a world leading international facility. One such component, the start counter, consisting of a set of scintillators surrounding the beamline, was used to determine the start time of an event originating in the target via photo-induced reactions. A novel approach that exploits the start counter as a nucleon polarimeter is implemented by this project. We will show analysis that has led to measurements of neutron polarization in deuteron photodisintegration between beam energies of 0.6 and 2.2 GeV, with a wide angular range, covering N-N* reaction dynamics in second and third resonance region, and providing exciting new insights into hexaquark studies.
[1] I. Vidana, M. Bashkanov, D. P. Watts, and A. Pastore, Phys. Lett. B 781, 112 (2018).
[2] F. J. Dyson and N.-H. Xuong, Phys. Rev. Lett. 13, 815 (1964).
*UKRI-STFC
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