Interaction between Four Half-Spin Particles and the Decay of the  -Meson

Michel, Louis

doi:10.1088/0370-1298/63/5/311

Cited by 320 publications

(205 citation statements)

References 23 publications

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“…Uncertainty of the background estimate is due to the limited size of the data sample used to validate the simulation. Kµ2 decay followed by µ → e decay could contribute significantly to the background, but energetic forward daughter positrons compatible to Ke2 topology are suppressed due to muon polarization [11].…”

Section: Background Rejectionmentioning

confidence: 99%

Status of NA62

Lazzeroni¹

2016

Proceedings of Flavor Physics and CP Violation 2010 — PoS(FPCP 2010)

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The NA62 experiment at CERN aims to search for new phenomena beyond the Standard Model, by measuring two of the theoretically cleanest kaon decays. Two phases can be distinguished in the NA62 physics programme. During the current short term phase (data taking completed in years 2007-8), the ratio R K = Γ(K + → eν e (γ))/Γ(K + → µν µ (γ)) of leptonic decay rates is studied, which tests the structure of weak interactions and lepton flavour universality. In the second phase (long term) the experiment will focus on the measurement of the branching ratio of the very rare kaon decay K + → π + νν with a 10% precision. In this paper, firstly the R K analysis is summarized, and the preliminary result R K = based on 40% of data collected in 2007 is discussed. Then a status report of the long term project is presented, including a discussion of the beam line, detectors, and the experimental strategy.Flavor Physics and CP Violation -FPCP 2010

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Section: Background Rejectionmentioning

confidence: 99%

Status of NA62

Lazzeroni¹

2016

Proceedings of Flavor Physics and CP Violation 2010 — PoS(FPCP 2010)

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“…e e and its 'inverse' e ! e are successfully described by the 'V-A' interaction, which is a particular case of the local, derivative-free, lepton-number-conserving, four-fermion interaction [886]. The 'V-A' form and the nature of the neutrinos ( e and e ) have been determined by experiment [887,888].…”

Section: Decaysmentioning

confidence: 99%

Flavor physics of leptons and dipole moments

Raidal¹,

Schaaf²,

Bigi³

et al. 2009

Flavor in the Era of the LHC

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This chapter of the report of the "Flavour in the era of the LHC" Workshop discusses the theoretical, phenomenological and experimental issues related to flavour phenomena in the charged lepton sector and in flavour-conserving CP-violating processes. We review the current experimental limits and the main theoretical models for the flavour structure of fundamental particles. We analyze the phenomenological consequences of the available data, setting constraints on explicit models beyond the Standard Model, presenting benchmarks for the discovery potential of forthcoming measurements both at the LHC and at low energy, and exploring options for possible future experiments.

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“…One convenient form [1,2] describes the distributions in terms of four parameters ρ, η, δ , and ξ , commonly referred to as the Michel parameters. Neglecting the electron and neutrino masses and radiative corrections, the differential decay rate for positive muon decay is given in terms of the decay parameters ρ, δ , and ξ by…”

Section: Physics Of Twistmentioning

confidence: 99%

TWIST: Measuring the Space-Time Structure of Muon Decay

Gagliardi

2004

AIP Conference Proceedings

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Abstract. TWIST, the TRIUMF Weak Interaction Symmetry Test, is a precision measurement of the energy and angular distributions of the positrons emitted in polarized muon decay. The goal is to search for new physics that leads to deviations of the Michel parameters ρ, δ , and P µ ξ from their Standard Model values. TWIST will determine these parameters to a few parts in 10 4 , an improvement of at least an order of magnitude in each case. At this level, TWIST will confront several proposed extensions to the Standard Model.

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Interaction between Four Half-Spin Particles and the Decay of the -Meson

Cited by 320 publications

References 23 publications

Status of NA62

Status of NA62

Flavor physics of leptons and dipole moments

TWIST: Measuring the Space-Time Structure of Muon Decay

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