scholarly journals Charged-lepton mass matrix and nonzeroθ13with TeV scale new physics

2012 ◽  
Vol 85 (3) ◽  
Author(s):  
Ahmed Rashed ◽  
Alakabha Datta
Keyword(s):  
Charged Lepton ◽  
Mass Matrix ◽  
New Physics

scholarly journals Searching for muon to electron conversion: The Mu2e experiment at Fermilab

2019 ◽  
Author(s):  
Richard Bonventre
Keyword(s):  
Charged Lepton ◽  
Conversion Rate ◽  
New Physics ◽  
Previous Measurement ◽  
Negative Muon ◽  
Lepton Flavor ◽  
Wide Range ◽  
Electron Conversion ◽  
Design And Construction

The Mu2e experiment will measure the charged-lepton flavor violating (CLFV) neutrino-less conversion of a negative muon into an electron in the field of a nucleus. Mu2e will improve the previous measurement by four orders of magnitude, reaching a 90% C.L. limit of 8\times10^{-17}8×10−17 on the conversion rate. The experiment will reach mass scales of nearly 10^4104 TeV, far beyond the direct reach of colliders. The experiment is sensitive to a wide range of new physics, complementing and extending other CLFV searches. Mu2e is under design and construction at the Muon Campus of Fermilab; we expect to start taking physics data in 2022 with 3 years of running to achieve our target sensitivity.

scholarly journals Non-diagonal charged lepton mass matrix and non-zero θ13

2013 ◽  
Vol 718 (4-5) ◽  
pp. 1413-1420 ◽  
Author(s):  
J. Alberto Acosta ◽  
Alfredo Aranda ◽  
Manuel A. Buen-Abad ◽  
Alma D. Rojas
Keyword(s):  
Charged Lepton ◽  
Mass Matrix

scholarly journals A search for charged lepton flavor violation in the Mu2e experiment

2020 ◽  
Vol 35 (19) ◽  
pp. 2030007
Author(s):  
Manolis Kargiantoulakis
Keyword(s):  
Charged Lepton ◽  
New Physics ◽  
Muon Beam ◽  
Integrated System ◽  
Beyond The Standard Model ◽  
Lepton Flavor Violation ◽  
Lepton Flavor ◽  
Flavor Violation ◽  
Wide Range ◽  
Discovery Potential

The Mu2e experiment will search for the neutrino-less conversion of a muon into an electron in the field of an aluminum nucleus. An observation would be the first signal of charged lepton flavor violation and de facto evidence for new physics beyond the Standard Model. The clean signature of the conversion process offers an opportunity for a powerful search: Mu2e will probe four orders of magnitude beyond current limits, with real discovery potential over a wide range of well-motivated new physics models. This goal requires an integrated system of solenoids that will create the most intense muon beam in the world, and suppression of all possible background sources. The Mu2e components are currently being constructed, with the experiment planned to begin operations in the Fermilab Muon Campus within the next few years.

scholarly journals Search for Charged Lepton Flavour Violation at CMS

2018 ◽  
Vol 182 ◽  
pp. 02090
Author(s):  
Swagata Mukherjee
Keyword(s):  
Gauge Symmetry ◽  
Standard Model ◽  
Particle Physics ◽  
Charged Lepton ◽  
New Physics ◽  
Lepton Sector ◽  
Lepton Flavour Violation ◽  
The Standard Model ◽  
Flavour Violation ◽  
Lepton Flavour

Lepton flavour is a conserved quantity in the standard model of particle physics, but it does not follow from an underlying gauge symmetry. After the discovery of neutrino oscillation, it has been established that lepton flavour is not conserved in the neutral sector. Thus the lepton sector is an excellent place to look for New Physics, and in this perspective the Charged Lepton Flavour Violation is interesting. Various extensions of the standard model predict lepton flavour violating decays that can be observed at LHC. This report summarises several searches for lepton flavour violation with data collected by the CMS detector.

scholarly journals AN ANALYTICAL TREATMENT OF THE NEUTRINO MASSES AND MIXINGS

2013 ◽  
Vol 28 (39) ◽  
pp. 1350184
Author(s):  
RENATA JORA ◽  
JOSEPH SCHECHTER ◽  
M. NAEEM SHAHID
Keyword(s):  
Cp Violation ◽  
Charged Lepton ◽  
Mass Matrix ◽  
Neutrino Masses ◽  
Analytical Treatment ◽  
Unit Matrix ◽  
Mixing Matrix ◽  
Analytical Formulas ◽  
Neutrino Masses And Mixings

We obtain analytical formulas which connect the neutrino masses and the leptonic mixing matrix with the entries in the mass matrix for the approximation in which the charged lepton mixing matrix is the unit matrix. We also extract the CP violation phase and determine the conditions in which this is present.

scholarly journals Implications of the Muon g-2 result on the flavour structure of the lepton mass matrix

2021 ◽  
Vol 81 (10) ◽  
Author(s):  
Lorenzo Calibbi ◽  
M. L. López-Ibáñez ◽  
Aurora Melis ◽  
Oscar Vives
Keyword(s):  
Mass Matrix ◽  
New Physics ◽  
Flavor Symmetry ◽  
Moment Matrix ◽  
Leptonic Sector ◽  
Mass Matrices ◽  
The Standard Model ◽  
Model Predictions ◽  
Low Energies ◽  
Lepton Flavour

AbstractThe confirmation of the discrepancy with the Standard Model predictions in the anomalous magnetic moment by the Muon g-2 experiment at Fermilab points to a low scale of new physics. Flavour symmetries broken at low energies can account for this discrepancy but these models are much more restricted, as they would also generate off-diagonal entries in the dipole moment matrix. Therefore, if we assume that the observed discrepancy in the muon $$g-2$$ g - 2 is explained by the contributions of a low-energy flavor symmetry, lepton flavour violating processes can constrain the structure of the lepton mass matrices and therefore the flavour symmetries themselves predicting these structures. We apply these ideas to several discrete flavour symmetries popular in the leptonic sector, such as $$\Delta (27)$$ Δ ( 27 ) , $$A_4$$ A 4 , and $$A_5 < imes \mathrm{CP}$$ A 5 ⋉ CP .

scholarly journals Status of the COMET experiment

2018 ◽  
Vol 179 ◽  
pp. 01011 ◽  
Author(s):  
R. P. Litchfield ◽  
Keyword(s):  
Phase I ◽  
Proton Beam ◽  
Phase Ii ◽  
High Power ◽  
Charged Lepton ◽  
New Physics ◽  
Main Ring ◽  
Under Construction ◽  
Better Than

The COMET experiment, currently under construction at J-PARC, is designed to search for the the neutrinoless flavour-changing charged-lepton process μ- + A → e- + A, which is a promising channel to look for new physics. The experiment will make use of the high-power proton beam available at the J-PARC Main Ring to achieve a sensitivity orders of magnitude better than the current limits. The experiment will be staged, with ‘Phase-I’ scheduled to begin commissioning soon while the ‘Phase-II’ design is refined in parallel. A description the design of both Phases is presented, along with the latest developments.

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