PEN experiment: a precise test of lepton universality

2018/11/30 by C. J. Glaser, D. Pocanic, Glaser, C. J. +55 · 1 citation
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #High Energy Physics - Phenomenology (hep-ph) #Nuclear Experiment (nucl-ex) #hep-ex #hep-ph #nucl-ex

paper · pdf · doi:10.48550/arxiv.1812.00782

Talk presented at CIPANP2018. 9 pages, LaTeX, 4 pdf figures, 1 table. arXiv admin note: substantial text overlap with arXiv:1701.05254

arxiv created 2018/11/30 · arxiv updated 2018/12/04

Abstract

With few open channels and uncomplicated theoretical description, charged pion decays are uniquely sensitive to certain standard model (SM) symmetries, the universality of weak fermion couplings, and to aspects of pion structure and chiral dynamics. We review the current knowledge of the pion electronic decay π⁺ → e⁺ ν_e(γ), or π_e2(γ), and the resulting limits on non-SM processes. Focusing on the PEN experiment at the Paul Scherrer Institute (PSI), Switzerland, we examine the prospects for further improvement in the near term.

Citations

• PEN: a low energy test of lepton universality

Cited by

• European Strategy for Particle Physics Update -- PIONEER: a next generation rare pion decay experiment

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