The reaction n p -> d π0 measured at CLAS as a probe of Nucleon-Delta Attraction
Abstract
The CLAS detector setup, previously located in Hall B of Jefferson Lab, has been used to investigate secondary scattering reactions. In the first step, neutrons are produced via the photoproduction reaction γ p -> π+ n, which is tagged via detection of the π+ in CLAS. The neutrons then propagate through the 40-cm long liquid hydrogen target, and some of these neutrons undergo a secondary scattering reaction. The exclusive reaction n p -> d π0 is seen via detection of a deuteron in CLAS, coincident with the tagged π+. Cross sections from this reaction show a resonant peaking at a center-of-mass energy, W, corresponding to a resonant nucleon-delta system, which decays to a bound deuteron and a neutral pion. These data provide new information that can be used to extract details of the nuclear force in the N-▵ system.
We gratefully acknowledge the support from NSF Grant PHY-1714008.- Publication:
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APS April Meeting Abstracts
- Pub Date:
- 2019
- Bibcode:
- 2019APS..APRD09008H