Results 61 to 70 of about 20,379 (180)

Minimal inverse-seesaw mechanism with Abelian flavour symmetries

Journal of High Energy Physics, 2021
We study the phenomenology of the minimal (2, 2) inverse-seesaw model supplemented with Abelian flavour symmetries. To ensure maximal predictability, we establish the most restrictive flavour patterns which can be realised by those symmetries. This setup
H. B. Câmara, R. G. Felipe, F. R. Joaquim   +2 more
doaj   +1 more source

Testing models with non-minimal Higgs sector through the decay t->q+WZ [PDF]

, 1999
We study the contribution of charged Higgs boson to the rare decay of the top quark t->q+WZ (q=d,s,b) in models with Higgs sector that includes doublets and triplets.
A. Giveon, C. Caso, D. A. López Falcón, D. A. LópezFalcón, D. Atwood, E. Jenkins, G. Eilam, G. Mahlon, H. Arason, H. Haber, H.P. Nilles, J. L. Díaz Cruz, J.F. Gunion, J.L. Díaz Cruz, J.L. Díaz Cruz, J.L. Díaz Cruz, J.L. Díaz Cruz, K. Cheung, M. Sher, R. Decker, T. Cheng, T.G. Rizzo, T.G. Rizzo, W. Hollik, W.A. Bardeen   +24 more
core   +3 more sources

A minimal modular invariant neutrino model

Journal of High Energy Physics, 2023
We present a neutrino mass model based on modular symmetry with the fewest input parameters to date, which successfully accounts for the 12 lepton masses and mixing parameters through 6 real free parameters including the modulus.
Gui-Jun Ding, Xiang-Gan Liu, Chang-Yuan Yao   +2 more
doaj   +1 more source

Modular flavor symmetries and fermion mass hierarchies

Journal of High Energy Physics
We investigate fermion mass hierarchies in models with modular flavor symmetries. Several key conclusions arise from the observation that the determinants of mass matrices transform as 1-dimensional vector-valued modular forms. We demonstrate that, under
Mu-Chun Chen, Xueqi Li, Xiang-Gan Liu, Michael Ratz   +3 more
doaj   +1 more source

Non-Abelian discrete gauge symmetries in 4d string models [PDF]

, 2012
We study the realization of non-Abelian discrete gauge symmetries in 4d field theory and string theory compactifications. The underlying structure generalizes the Abelian case, and follows from the interplay between gaugings of non-Abelian isometries of ...
A Hanany, A. M. Uranga, AM Uranga, B Florea, BA Burrington, BA Burrington, C Hull, D Andriot, D Cremades, D Cremades, D Lüst, D. Regalado, F Marchesano, F Marchesano, F Marchesano, F. Marchesano, G Aldazabal, G Aldazabal, H Abe, H Abe, HK Dreiner, HM Lee, I Antoniadis, J Preskill, L Castellani, LE Ibáñez, LE Ibáñez, LE Ibáñez, LE Ibáñez, LF Abbott, LM Krauss, M Berasaluce-Gonzalez, M. Berasaluce-González, MG Alford, MG Alford, MG Alford, MG Alford, MG Alford, N Kaloper, O Lebedev, P. G. Cámara, PG Camara, PG Camara, PG Camara, R Blumenhagen, R Coquereaux, R Kallosh, R Kappl, RN Mohapatra, S Gukov, S Hellerman, S Kachru, SA Abel, SP Martin, SR Coleman, T Araki, T Banks, T Banks, T Banks, T Kobayashi   +59 more
core   +2 more sources

Radiative neutrino mass models from non-invertible selection rules

Journal of High Energy Physics
We apply non-invertible selection rules coming from a fusion algebra to radiative neutrino mass models where fields are labeled by the elements in the algebra.
Tatsuo Kobayashi, Hiroshi Okada, Hajime Otsuka   +2 more
doaj   +1 more source

Weak scale right-handed neutrino as pseudo-Goldstone fermion of spontaneously broken U 1 L μ − L τ $$ \mathrm{U}{(1)}_{L_{\mu }-{L}_{\tau }} $$

Journal of High Energy Physics, 2021
Possibility of a Right-Handed (RH) neutrino being a Goldstone fermion of a spontaneously broken global U(1) symmetry in a supersymmetric theory is considered.
Anjan S. Joshipura, Ketan M. Patel
doaj   +1 more source

Parity Realization in Lattice QCD with Ginsparg-Wilson Fermions

, 2010
The Vafa-Witten arguments on the realization of parity and flavour symmetries in the QCD vacuum do not apply to two lattice regularizations of QCD which are able to reproduce the chiral anomaly: Wilson fermions and Ginsparg-Wilson fermions.
Azcoiti, V., Di Carlo, G., Follana, E., Vaquero, A.   +3 more
core   +1 more source

Charmed states and flavour symmetry breaking [PDF]

EPJ Web of Conferences, 2018
Extending the SU(3) flavour symmetry breaking expansion from up, down and strange sea quark masses to partially quenched valence quark masses allows an extrapolation to the charm quark mass. This approach leads to a determination of charmed quark hadron masses and decay constants.
Horsley, R., Koumi, Z., Nakamura, Y., Perlt, H., Rakow, P. E. L., Schierholz, G., Schiller, A., Stuben, H., Young, R. D., Zanotti, J. M.   +9 more
openaire   +6 more sources

Quark-lepton mass relations from modular flavor symmetry

Journal of High Energy Physics
The so-called Golden Mass Relation provides a testable correlation between charged-lepton and down-type quark masses, that arises in certain flavor models that do not rely on Grand Unification. Such models typically involve broken family symmetries.
Mu-Chun Chen, Stephen F. King, Omar Medina, José W. F. Valle   +3 more
doaj   +1 more source