On the muon mass

1973 ◽  
Vol 17 (1) ◽  
pp. 66-72
Author(s):  
F. R. Tangherlini
Keyword(s):  
Muon Mass

Investigation of logarithmic contributions in the electron-to-muon mass ratio to the shift of the S energy levels in the muonium atom

2003 ◽  
Vol 66 (5) ◽  
pp. 893-901 ◽  
Author(s):  
N. A. Boikova ◽  
S. V. Kleshchevskaya ◽  
Yu. N. Tyukhtyaev ◽  
R. N. Faustov
Keyword(s):  
Energy Levels ◽  
Mass Ratio ◽  
Muonium Atom ◽  
Muon Mass

On the electron-muon mass ratio

1975 ◽  
Vol 88 (2) ◽  
pp. 337-348
Author(s):  
D. Dillenburg ◽  
Th.A.J. Maris
Keyword(s):  
Mass Ratio ◽  
Muon Mass

scholarly journals Higgs-Kibble Mechanism and the Electron-Muon Mass Ratio

1978 ◽  
Vol 59 (2) ◽  
pp. 571-578 ◽  
Author(s):  
K. Nishijima ◽  
H. Sato
Keyword(s):  
Mass Ratio ◽  
Muon Mass

The rate of energy loss of high-energy cosmic ray muons

1963 ◽  
Vol 275 (1362) ◽  
pp. 391-410 ◽  
Keyword(s):  
Energy Spectrum ◽  
Energy Loss ◽  
Sea Level ◽  
Cosmic Ray ◽  
Nuclear Interaction ◽  
High Energy ◽  
Level Energy ◽  
Muon Spectrum ◽  
The Third ◽  
Muon Mass

The rate of energy loss of muons is examined by com paring the observed depth-intensity relation with that predicted from a knowledge of the sea-level energy spectrum of cosmic ray muons. The evidence for each of the parameters entering into the analysis is assessed and estimates are made of the sea-level muon spectrum up to 10000 GeV and the depth-intensity relation down to 7000 m.w.e. The effect of range-straggling on the underground intensities is considered and shown to be important at depths below 1000 m.w.e. Following previous workers the energy loss relation is written as -d E /d x =1.88+0.077 in E ' m / mc 2 + b E MeV g -1 cm 2 , where E ' m is the maximum transferrable energy in a /i-e collision and m is the muon mass. The first two terms give the contribution from ionization (and excitation) loss and the third term is the combined contribution from pair production, bremsstrahlung and nuclear interaction. The best estimate of the coefficient b from the present work is b = (3.95 + 0.25) x 10 -6 g -1 cm 2 over the energy range 500 to 10000 GeV, which is close to the theoretical value of 4.0 x 10 -6 g -1 cm 2 . It is concluded that there is no evidence for any marked anomaly in the energy loss processes for muons of energies up to 10000 GeV.

scholarly journals Lepton-flavour non-universality of $${\bar{B}}\rightarrow D^*\ell {{\bar{\nu }}}$$ angular distributions in and beyond the Standard Model

2021 ◽  
Vol 81 (11) ◽  
Author(s):  
Christoph Bobeth ◽  
Marzia Bordone ◽  
Nico Gubernari ◽  
Martin Jung ◽  
Danny van Dyk
Keyword(s):  
Experimental Data ◽  
Standard Model ◽  
Effective Theory ◽  
Angular Distributions ◽  
Beyond The Standard Model ◽  
Mass Effects ◽  
Muon Mass ◽  
The Standard Model ◽  
Current Experimental Data ◽  
Lepton Flavour

AbstractWe analyze in detail the angular distributions in $${\bar{B}}\rightarrow D^*\ell {{\bar{\nu }}}$$ B ¯ → D ∗ ℓ ν ¯ decays, with a focus on lepton-flavour non-universality. We investigate the minimal number of angular observables that fully describes current and upcoming datasets, and explore their sensitivity to physics beyond the Standard Model (BSM) in the most general weak effective theory. We apply our findings to the current datasets, extract the non-redundant set of angular observables from the data, and compare to precise SM predictions that include lepton-flavour universality violating mass effects. Our analysis shows that the number of independent angular observables that can be inferred from current experimental data is limited to only four. These are insufficient to extract the full set of relevant BSM parameters. We uncover a $$\sim 4\sigma $$ ∼ 4 σ tension between data and predictions that is hidden in the redundant presentation of the Belle 2018 data on $${\bar{B}}\rightarrow D^*\ell {{\bar{\nu }}}$$ B ¯ → D ∗ ℓ ν ¯ decays. This tension specifically involves observables that probe $$e-\mu $$ e - μ lepton-flavour universality. However, we find inconsistencies in these data, which renders results based on it suspicious. Nevertheless, we discuss which generic BSM scenarios could explain the tension, in the case that the inconsistencies do not affect the data materially. Our findings highlight that $$e-\mu $$ e - μ non-universality in the SM, introduced by the finite muon mass, is already significant in a subset of angular observables with respect to the experimental precision.

scholarly journals PION AND MUON MASS DIFFERENCE: A DETERMINING FACTOR IN ELEMENTARY PARTICLE MASS DISTRIBUTION

2008 ◽  
Vol 23 (01) ◽  
pp. 53-64
Author(s):  
G. N. SHAH ◽  
T. A. MIR
Keyword(s):  
Elementary Particle ◽  
Mass Distribution ◽  
Mass Spectra ◽  
Neutral Pion ◽  
Mass Difference ◽  
Basic Mechanism ◽  
Elementary Particles ◽  
Muon Mass ◽  
Particle Level ◽  
Determining Factor

The most fundamental to the elementary particles is the mass they possess and it would be of importance to explore a possible relationship amongst their masses. Here, an attempt is made to investigate this important aspect irrespective of their nature or scheme of classification. We show that there exists a striking tendency for successive mass differences between elementary particles to be close integral/half integral multiple of the mass difference between a neutral pion and a muon. Thus indicating discreteness in the nature of the mass occurring at the elementary particle level. Furthermore, this mass difference of 29.318 MeV is found to be common to the mass spectra of leptons and baryons, implying thereby existence of a basic mechanism linking elementary particles responding to different interactions.

THE 2–3 SYMMETRY AND LARGE REACTOR MIXING ANGLE

2013 ◽  
Vol 28 (33) ◽  
pp. 1330030 ◽  
Author(s):  
AHMED RASHED ◽  
ALAKABHA DATTA
Keyword(s):  
Symmetry Breaking ◽  
Charged Lepton ◽  
Mass Matrix ◽  
Higgs Doublet ◽  
Mixing Angle ◽  
Neutrino Sector ◽  
Muon Mass ◽  
Symmetric Structure ◽  
Reactor Mixing

We introduce a 2–3 symmetric structure of the charged lepton mass matrix except for one breaking by the muon mass. Symmetry breaking effects are provided both in the charged lepton and the neutrino sector to produce corrections to the leptonic mixing and explain the recent θ13 measurements. A model that extends the SM by three right-handed neutrinos, an extra Higgs doublet, and multi-singlet scalars is introduced to generate the leptonic mixing.

Unified gauge theories and the electron-muon mass ratio

1973 ◽  
Vol 61 ◽  
pp. 230-244 ◽  
Author(s):  
J. Frenkel ◽  
M.E. Ebel
Keyword(s):  
Gauge Theories ◽  
Mass Ratio ◽  
Muon Mass

scholarly journals Lower Limit on Neutral-Heavy-Muon Mass

1981 ◽  
Vol 46 (5) ◽  
pp. 299-302 ◽  
Author(s):  
A. R. Clark ◽  
K. J. Johnson ◽  
L. T. Kerth ◽  
S. C. Loken ◽  
T. W. Markiewicz ◽  
...  
Keyword(s):  
Lower Limit ◽  
Muon Mass
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