Baryon number violation: from nuclear matrix elements to BSM physics

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Abstract
Processes that violate baryon number, most notably proton decay and n n ¯ transitions, are promising probes of physics beyond the Standard Model (BSM) needed to understand the lack of antimatter in the Universe. To interpret current and forthcoming experimental limits, theory input from nuclear matrix elements to UV complete models enters. Thus, an interplay of experiment, effective field theory, lattice QCD, and BSM model building is required to develop strategies to accurately extract information from current and future data and maximize the impact and sensitivity of next-generation experiments. Here, we briefly summarize the main results and discussions from the workshop ‘INT-25-91W: Baryon Number Violation: From Nuclear Matrix Elements to BSM Physics,’ held at the Institute for Nuclear Theory, University of Washington, Seattle, WA, 13–17 January 2025.
Funding Information
  • National Science Foundation (PHY-2412963)
  • Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung (PCEFP2_181117)
  • Nuclear Physics (DE-AC05-00OR22725)

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