Results 1 to 10 of about 216,696 (240)

Studying Lepton Family Violation in Lepton-Lepton Collisions [PDF]

open access: yesEur.Phys.J.C4:525-532,1998, 1997
In the context of the future high energy - high luminosity electron and muon colliders, all the relevant four-lepton processes with the lepton family violation (LFV) are systematically classified. The most general LFV effective lagrangians are found, and the helicity differential cross sections for the LFV processes are calculated.
Yu. F. Pirogov, V.V. Kabachenko
arxiv   +6 more sources

Neutrino Masses and Lepton Flavour Violation in Thick Brane Scenarios [PDF]

open access: yesPhys.Rev. D64 (2001) 073005, 2001
We address the issue of lepton flavour violation and neutrino masses in the ``fat-brane'' paradigm, where flavour changing processes are suppressed by localising different fermion field wave-functions at different positions (in the extra dimensions) in a thick brane. We study the consequences of suppressing lepton number violating charged lepton decays
A. Das   +55 more
arxiv   +4 more sources

Charged-Lepton Flavour Physics [PDF]

open access: yes, 2012
This writeup of a talk at the 2011 Lepton-Photon symposium in Mumbai, India, summarises recent results in the charged-lepton flavour sector. I review searches for charged-lepton flavour violation, lepton electric dipole moments and flavour-conserving CP violation. I also discuss recent progress in tau-lepton physics and in the Standard Model prediction
A Czarnecki   +104 more
arxiv   +3 more sources

New model for radiatively generated Dirac neutrino masses and lepton flavor violating decays of the Higgs boson [PDF]

open access: yesPhys. Rev. D 100, 015044 (2019), 2019
We propose a new mechanism to explain neutrino masses with lepton number conservation, in which the Dirac neutrino masses are generated at the two-loop level involving a dark matter candidate. In this model, branching ratios of lepton flavor violating decays of the Higgs boson can be much larger than those of lepton flavor violating decays of charged ...
Enomoto, Kazuki   +3 more
arxiv   +5 more sources

Experimental Review on Lepton Universality and Lepton Flavour Violation tests at the B-factories [PDF]

open access: yesPoS KAON:054,2008, 2007
Since 1999, the B-factories collaborations BABAR and Belle have accumulated and studied large samples of tau lepton pairs. The experimental results on Lepton Universality checks and Lepton Flavour Violation searches are reported.
Lusiani, Alberto
arxiv   +4 more sources

Lepton flavor violation with tau leptons [PDF]

open access: yesarXiv
We review the status and importance of lepton flavor violation with tauons, focusing on overlooked flavor-breaking patterns as well as tau-flavor violation in nucleon decays.
arxiv   +3 more sources

Test of lepton universality in beauty-quark decays [PDF]

open access: yesNature Physics, 2021
The standard model of particle physics currently provides our best description of fundamental particles and their interactions. The theory predicts that the different charged leptons, the electron, muon and tau, have identical electroweak interaction ...
L. C. R. Aaij   +499 more
semanticscholar   +1 more source

Test of Lepton Universality in b→sℓ^{+}ℓ^{-} Decays. [PDF]

open access: yesPhysical Review Letters, 2022
The first simultaneous test of muon-electron universality using B^{+}→K^{+}ℓ^{+}ℓ^{-} and B^{0}→K^{*0}ℓ^{+}ℓ^{-} decays is performed, in two ranges of the dilepton invariant-mass squared, q^{2}.
R. Aaij   +499 more
semanticscholar   +1 more source

Constraining new physics in entangled two-qubit systems: top-quark, tau-lepton and photon pairs [PDF]

open access: yesThe European Physical Journal C, 2022
The measurement of quantum entanglement can provide a new and most sensitive probe to physics beyond the Standard Model. We use the concurrence of the top-quark pair spin states produced at colliders to constrain the magnetic dipole term in the coupling ...
M. Fabbrichesi   +2 more
semanticscholar   +1 more source

Averages of $b$-hadron, $c$-hadron, and $\tau$-lepton properties as of 2021 [PDF]

open access: yes, 2022
This paper reports world averages of measurements of $b$-hadron, $c$-hadron, and $\tau$-lepton properties obtained by the Heavy Flavour Averaging Group using results available before April 2021.
H. C. Y. Amhis   +40 more
semanticscholar   +1 more source

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