Search for new Physics with the π→ eν Decay

2013/08/26 by Luca Doria, Doria, Luca
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex) #hep-ex #nucl-ex

paper · pdf · doi:10.48550/arxiv.1308.5641

arxiv created 2013/08/26 · arxiv updated 2013/08/27

Abstract

In the Standard Model, lepton universality refers to the identical electroweak gauge interactions among charged leptons. The measurement of the branching ratio R_{e / μ} = (Γ(π→ e ν))/(Γ(π→μν)) is one of the most stringent tests of lepton universality between the first two generations. The TRIUMF PIENU experiment aims at the most precise test of universality measuring R_{e / μ} with 0.1% precision. The measurement will provide improved constraints to physics beyond the Standard Model or uncover new scenarios if a disagreement is found.

Related

• Status of the TRIUMF PIENU Experiment
• Improved Search for Heavy Neutrinos and a Test of Lepton Universality in the Decay π⁺ → e⁺ ν
• The PIENU experiment: a precision measurement of the (π-> e ν) / (π-> μν) branching ratio
• PEN: a sensitive search for non-(V-A) weak processes
• PEN experiment: a precise test of lepton universality