# NPDGamma

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Timeline
Today: ............ 2019-11-19
Beam Power: ............ SNS Beam Power
Beam Calendar: ............ Beam Calendar
Last Collab Meeting: ............ August 1,2 2011 - information
Beamline
FNPB ............ status
Work Packages
Detector: ............ status
DAQ: ............ status
LH2 TARGET: ............ status
LH2 TARGET DOCUMENTS: ............ Hydrogen Target Documents
Guide Field: ............ status
Beam Monitor: ............ status

The $\vec n + p \to d + \gamma$ experiment is a high-precision measurement of nuclear forces at low energies. We will measure the correlation between neutron spin and photon direction in the capture of cold neutrons on hydrogen. This correlation depends on the long-range component of the weak interaction between nucleons (protons and neutrons), and is particularly sensitive to the neutral weak current. The unique properties of the weak interaction allow it to be used to gain a better understanding of what is primarily a strongly-interacting system.

## NPDGamma Status

• It's the winter 2013-14 shutdown
• Offline analysis is ongoing
• Multiple determinations of asymmetries on various targets
• Multiple drafts in progress

For previous updates check out this webpage.