Lepton Universality Violating Anomalies in B Decays

2019 ◽  
pp. 377-383
Author(s):  
Alakabha Datta
Keyword(s):  
B Decays ◽  
Lepton Universality

scholarly journals Experimental Review on Lepton Universality and Lepton Flavour Violation tests in B decays

2020 ◽  
Vol 234 ◽  
pp. 01004 ◽  
Author(s):  
P. de Simone
Keyword(s):  
Standard Model ◽  
Theoretical Models ◽  
New Physics ◽  
B Decays ◽  
Experimental Status ◽  
Lepton Flavour Violation ◽  
Lepton Universality ◽  
The Standard Model ◽  
Flavour Violation ◽  
Lepton Flavour

Tests of lepton flavour universality in B decays offer an excellent opportunity to test the Standard Model, and show hints of new physics in analyses performed by the LHCb, Belle and BaBar experiments. Several theoretical models proposed to explain possible violation of lepton flavour universality claim a connection with lepton flavour violation in B decays. These proceedings review the experimental status of the tests of lepton flavour universality and the searches of lepton flavour violation in B decays.

scholarly journals Review of lepton universality tests in B decays

2018 ◽  
Vol 46 (2) ◽  
pp. 023001 ◽  
Author(s):  
Simone Bifani ◽  
Sébastien Descotes-Genon ◽  
Antonio Romero Vidal ◽  
Marie-Hélène Schune
Keyword(s):  
B Decays ◽  
Lepton Universality

scholarly journals Differential distributions in rare four-leptonic B-decays.

2018 ◽  
Vol 191 ◽  
pp. 02011
Author(s):  
Anna Danilina ◽  
Nikolay Nikitin
Keyword(s):  
B Mesons ◽  
Virtual Photon ◽  
Photon Emission ◽  
Branching Ratios ◽  
B Decays ◽  
Dominance Model ◽  
Lepton Universality ◽  
Vector Dominance ◽  
The Standard Model ◽  
Bremsstrahlung Contribution

The branching ratios and differential distributions for the fourleptonic decays B- → μ+μ- νe e-, B- → e+e- νμ μ- and B- → μ+ νμ μ-μ- are calculated within the Standard Model. The contributions of the virtual photon emission from the b- and u- quarks and the bremsstrahlung contribution were taken into account. The resonances contributions were calculated using the vector dominance model. In this paper we present the differential distributions for the B- → μ+μ- νe e- decay obtained by two methods. Testing the lepton universality in rare multileptonic decays of charged and neutral B mesons are discussed.

scholarly journals Experimental status of LNU in B decays in LHCb

2019 ◽  
Author(s):  
Sean Benson
Keyword(s):  
Standard Model ◽  
Semileptonic Decays ◽  
Experimental Tests ◽  
New Physics ◽  
B Decays ◽  
Experimental Status ◽  
Lepton Universality ◽  
Highly Sensitive ◽  
The Standard Model ◽  
Charged Leptons

In the Standard Model, the three charged leptons are identical copies of each other, apart from mass differences. Experimental tests of this feature in semileptonic decays of -hadrons are highly sensitive to New Physics particles which preferentially couple to the 2nd and 3rd generations of leptons. A review of the latest lepton universality tests in semileptonic transitions at is reported.

B decays on the lattice

2000 ◽  
Vol 83-84 (1-3) ◽  
pp. 3-13 ◽  
Author(s):  
S Hashimoto
Keyword(s):  
B Decays

scholarly journals Measurement of the running of the fine structure constant below 1 GeV with the KLOE detector

2019 ◽  
Vol 218 ◽  
pp. 02012
Author(s):  
Graziano Venanzoni
Keyword(s):  
Fine Structure ◽  
Energy Region ◽  
Direct Evidence ◽  
Branching Ratio ◽  
Structure Constant ◽  
Fine Structure Constant ◽  
Recent Measurement ◽  
Single Measurement ◽  
Lepton Universality ◽  
Hadronic Contribution

I will report on the recent measurement of the fine structure constant below 1 GeV with the KLOE detector. It represents the first measurement of the running of α(s) in this energy region. Our results show a more than 5σ significance of the hadronic contribution to the running of α(s), which is the strongest direct evidence both in time-and space-like regions achieved in a single measurement. From a fit of the real part of Δα(s) and assuming the lepton universality the branching ratio BR(ω → µ+µ−) = (6.6 ± 1.4stat ± 1.7syst) · 10−5 has been determined

scholarly journals Semileptonic B Decays with Dynamical Quarks

2005 ◽  
Vol 140 ◽  
pp. 464-466 ◽  
Author(s):  
J. Shigemitsu ◽  
C.T.H. Davies ◽  
A. Dougall ◽  
K. Foley ◽  
E. Gamiz ◽  
...  
Keyword(s):  
B Decays ◽  
Semileptonic B Decays

scholarly journals Factorization and polarization in two charmed-meson B decays

2006 ◽  
Vol 46 (2) ◽  
pp. 367-377 ◽  
Author(s):  
C.-H. Chen ◽  
C.-Q. Geng ◽  
Z.-T. Wei
Keyword(s):  
Charmed Meson ◽  
B Decays
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