Measurement of the weak nucleon-nucleon interaction by polarized cold neutron capture on protons

Ricardo Alarcon, D. Blyth

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The NPDGamma Experiment at the Spallation Neutron Source at Oak Ridge National Laboratory is measuring the parity-odd correlation between the neutron spin and the direction of the emitted photon in the capture of polarized cold neutrons on protons. A parity violating asymmetry from this process is directly related to the strength of the hadronic weak interaction between nucleons. The experiment was run first with heavier nuclear targets to check systematic effects, false asymmetries, and backgrounds. Since early 2012 the experiment has been collecting data with a 16-liter liquid parahydrogen target. Data taking will continue through 2013 until statistics for a 10 -8 asymmetry measurement are expected. The experiment performance will be discussed as well as the status of the asymmetry measurements.

Original languageEnglish (US)
Title of host publicationEPJ Web of Conferences
StatePublished - 2014
Event2013 International Nuclear Physics Conference, INPC 2013 - Firenze, Italy
Duration: Jun 2 2013Jun 7 2013


Other2013 International Nuclear Physics Conference, INPC 2013


ASJC Scopus subject areas

  • Physics and Astronomy(all)

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