Zobrazeno 1 - 10
of 1 478
pro vyhledávání: '"lepton: family"'
Autor:
Adam, Apriadi Salim, Benoit, Nicholas J., Kawamura, Yuta, Matsuo, Yamato, Morozumi, Takuya, Shimizu, Yusuke, Tokunaga, Yuya, Toyota, Naoya
In this talk, we have reviewed the recent development on the time evolution of lepton family number carried by Majorana neutrinos \cite{Adam:2021qiq}. This article focuses on the subtle points of the derivation of the lepton family numbers and their
Externí odkaz:
http://arxiv.org/abs/2105.04306
Autor:
Sahoo, D.
The electroweak penguin B decays mediated by $b \to s \ell^+ \ell^- $ transitions are flavour-changing neutral current processes, and are thus sensitive to new physics owing to potential contributions of heavy particles in the quantum loop. Recently,
Externí odkaz:
http://arxiv.org/abs/2101.03685
Publikováno v:
Phys. Rev. D 92, 035017 (2015)
Motivated by the neutrino data, an extension of the Standard Model with three Higgs-boson doublets has been proposed. Imposing an O(2) x Z2 family symmetry, a neutrino mixing matrix with theta23 = pi/4 and theta13 = 0 appears in a natural way. Even t
Externí odkaz:
http://arxiv.org/abs/1503.05948
We study the possibility of dark matter in the form of heavy neutrinos from a fourth lepton family with helicity suppressed couplings such that dark matter is produced thermally via annihilations in the early Universe. We present all possible constra
Externí odkaz:
http://arxiv.org/abs/1309.6326
Imagine to discover a new fourth family of leptons at the Large Hadron Collider (LHC) but no signs of an associated fourth family of quarks. What would that imply? An intriguing possibility is that the new fermions needed to compensate for the new le
Externí odkaz:
http://arxiv.org/abs/0905.1331
Autor:
La, HoSeong
The Standard Model is extended minimally with a new flavor-violating family symmetry ${\rm U(1)}_\lambda$, which acts only on leptons including the right-handed neutrinos. The model is anomaly free with family-dependent ${\rm U(1)}_\lambda$ charges,
Externí odkaz:
http://arxiv.org/abs/1308.0088
Autor:
Ajaib, M. A., Barr, S. M.
Publikováno v:
Phys.Rev.D84:035021,2011
It is shown that realistic models can be constructed in which the Standard Model Higgs field is in a non-trivial multiplet of a non-abelian family group of the quarks and leptons. It is shown that the observed quark and lepton masses and mixing angle
Externí odkaz:
http://arxiv.org/abs/1105.1399
Publikováno v:
Prog.Theor.Phys. 111 (2004) 123-149
In leptogenesis scenario, the decays of heavy Majorana neutrinos generate lepton family asymmetries, $Y_e, Y_{\mu}$ and $Y_{\tau}$. They are sensitive to CP violating phases in seesaw models. The time evolution of the lepton family asymmetries are de
Externí odkaz:
http://arxiv.org/abs/hep-ph/0308276
Publikováno v:
JHEP 0807:051,2008
We discuss a realization of the non-abelian group O(2) as a family symmetry for the lepton sector. The reflection contained in O(2) acts as a mu-tau interchange symmetry, enforcing--at tree level--maximal atmospheric neutrino mixing and a vanishing m
Externí odkaz:
http://arxiv.org/abs/0805.1175
Autor:
Ma, Ernest
Publikováno v:
Europhys.Lett.79:61001,2007
The newly proposed finite symmetry Sigma(81) is applied to the problem of neutrino tribimaximal mixing. The result is more satisfactory than those of previous models based on A_4 in that the use of auxiliary symmetries (or mechanisms) may be avoided.
Externí odkaz:
http://arxiv.org/abs/hep-ph/0701016