A Lepton Universality Test at CERN NA62 Experiment
Evgueni Goudzovski
TL;DR
The paper reports a preliminary measurement of lepton universality at CERN NA62 by analyzing K+ decay data to compare electron and muon channels, testing a fundamental symmetry in particle physics.
Contribution
It presents a new preliminary measurement of the ratio RK in K+ decays, providing a test of lepton universality with a large dataset from the NA62 experiment.
Findings
Preliminary RK measurement consistent with Standard Model
Large dataset of 51089 K+ --> enu candidates analyzed
Provides constraints on new physics affecting lepton universality
Abstract
The NA62 experiment at CERN collected a large sample of K+ --> enu decays during a dedicated run in 2007, aiming at a precise test of lepton universality by measurement of the helicity suppressed ratio RK = BR(K+ --> enu)/BR(K+ --> munu). A preliminary result of the analysis of a partial data sample of 51089 K+ --> enu candidates is presented.
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Taxonomy
TopicsParticle physics theoretical and experimental studies · High-Energy Particle Collisions Research · Particle Detector Development and Performance