Results 281 to 290 of about 211,027 (308)

Test of lepton universality with B 0 → K *0 ℓ + ℓ − decays [PDF]

Journal of High Energy Physics, 2017
A test of lepton universality, performed by measuring the ratio of the branching fractions of the B0 → K*0μ+μ− and B0 → K*0e+e− decays, RK*0\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb}
Gerhard Raven
exaly   +3 more sources

FCC-ee: The Lepton Collider

European Physical Journal: Special Topics, 2019
In response to the 2013 Update of the European Strategy for Particle Physics, the Future Circular Collider (FCC) study was launched, as an international collaboration hosted by CERN. This study covers a highest-luminosity high-energy lepton collider (FCC-
J Barreiro Guimarães Da Costa, S Bondarenko, S Descotes-Genon   +2 more
exaly   +2 more sources

On flavourful Easter eggs for New Physics hunger and lepton flavour universality violation [PDF]

European Physical Journal C, 2017
Within the standard approach of effective field theory of weak interactions for ΔB=1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage ...
Marco Ciuchini, Marco Fedele, Ayan Paul
exaly   +2 more sources

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Charged Lepton Flavour Violation: An Experimental and Theoretical Introduction

, 2017
Charged lepton flavour violating transitions would be a clear signal of new physics beyond the Standard Model. Their search has been carried out in a variety of channels, the most sensitive being those involving a muon: however no positive evidence has ...
L. Calibbi, G. Signorelli
semanticscholar   +1 more source

Lepton–vector-lepton mixings and unitarity bounds

Physical Review D, 1988
Vector leptons (N,E) are present in both E/sub 6/ and SO(18) unified theories. We derive linear relations between the masses of these vector leptons and ordinary leptons, and their mixing angles. We calculate the amplitudes for such processes as E/sup +/E/sup -/..-->..E/sup +/E/sup -/ and e/sup +/E/sup -/..-->..boson-boson. We find that these relations
, London, , Bélanger, , Ng
openaire   +2 more sources

Leptonic and semi-leptonic weak interactions

Acta Physica Academiae Scientiarum Hungaricae, 1972
New results on leptonic and semi-leptonic weak processes are reviewed. Recent references on this subject are accumulated.
openaire   +1 more source

Decay-lepton distributions from photoproduced heavy leptons

Physical Review D, 1977
We discuss heavy-lepton pair production via the reaction $\ensuremath{\gamma}+Z\ensuremath{\rightarrow}{L}^{+}+{L}^{\ensuremath{-}}+Z$ followed by the decays ${L}^{\ifmmode\pm\else\textpm\fi{}}\ensuremath{\rightarrow}{\ensuremath{\mu}}^{\ifmmode\pm\else\textpm\fi{}}+\ensuremath{\nu}+\overline{\ensuremath{\nu}}$ or ${L}^{\ifmmode\pm\else\textpm\fi ...
J. Smith, A. Soni, J. A. M. Vermaseren
openaire   +1 more source

Leptonic charge and weak neutrino-lepton interactions

Soviet Physics Journal, 1971
A scheme is discussed according to which the system of leptons is characterized by a single leptonic charge with different values for muonic leptons and electronic leptons. The weak neutrino-lepton interaction is investigated within the framework of this scheme. “Charged” (V + A)-currents are introduced to describe the\(\tilde v_e \rightleftharpoons v_\
openaire   +1 more source

Tau lepton leptonic branching fractions from L3

Nuclear Physics B - Proceedings Supplements, 1995
We have measured the branching fractions of the τ lepton into electrons and muons with the L3 detector at LEP. The sample used in analysis has been collected during 1991, 1992 and 1993 around the Z peak, with an integrated luminosity of 61 pb −1 . A preliminary result yields: BR ( τ − → e − ν ¯ e ν τ ) = ( 17.69 ± 0.17
openaire   +1 more source

Lepton Number as the Fourth Color

, 1974
J. Pati, A. Salam
semanticscholar   +1 more source