Results 1 to 10 of about 165,968,050 (321)
Minimal complete tri-hypercharge theories of flavour [PDF]
Journal of High Energy PhysicsThe tri-hypercharge proposal introduces a separate gauged weak hypercharge assigned to each fermion family as the origin of flavour. This is arguably one of the simplest setups for building “gauge non-universal theories of flavour” or “flavour ...
Mario Fernández Navarro +2 more
doaj +8 more sources
Minimal flavour deconstruction [PDF]
Journal of High Energy Physics, 2023 We construct two concrete examples of flavour non-universal gauge theories which, after the inclusion of all d ≤ 4 gauge invariant operators, allow to describe the observed pattern of flavour in the charged fermion sector without any small Yukawa ...
Riccardo Barbieri, Gino Isidori
doaj +3 more sources
Flavour changes in locally supersymmetric theories
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1983 Abstract Locally supersymmetric models lead in general to flavour-changing gluino exchanges. We derive the necessary expressions for describing them in detail. We show that the K 0 K 0 mixing puts a lower bound on the gravitino mass and gives new restrictions on the Kobayashi-Maskawa angles.
H P Nilles, D Wyler
exaly +4 more sources
Lepton flavour violation in supergravity theories [PDF]
Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 1989 Abstract The lepton flavour violating processes μ →e γ , μ →ee + e − and ( μ , e) conversion in the presence of nuclei are discussed in supergravity models. The dominant contribution arises from charged s-lepton mixing, if one goes beyond the tree level and includes renormalization effects.
J D Vergados, G K Leontaris
exaly +3 more sources
On the Normalisation of the Modular Forms in Modular Invariant Theories of Flavour [PDF]
Physics Letters B, 2023 The problem of normalisation of the modular forms in modular invariant lepton and quark flavour models is discussed. Modular invariant normalisations of the modular forms are proposed.
S. Petcov
semanticscholar +5 more sources
Effective Theories for Quark Flavour Physics [PDF]
Effective Field Theory in Particle Physics and Cosmology, 2019 The purpose of the lectures that appear within this chapter is to provide the reader with an idea of how we can probe new physics with quark flavour observables using effective theory techniques.
L. Silvestrini
semanticscholar +4 more sources
Natural neutrino mass hierarchy in a theory of gauge flavour deconstruction [PDF]
Journal of High Energy PhysicsWe show how a natural neutrino mass hierarchy with large lepton mixing angles may be achieved in a theory of gauge flavour deconstruction. Hitherto it has been shown that neutrino anarchy may result from such theories, but here we show that this need not
Mario Fernández Navarro +2 more
doaj +2 more sources
Violations of lepton flavour and CP in supersymmetric unified theories [PDF]
Nuclear Physics B, 1995 As a consequence of the large top quark Yukawa coupling, supersymmetric unified theories with soft supersymmetry breaking terms generated at the Planck scale predict lepton flavour and CP violating processes with significant rates.
Lawrence Hall, Alessandro Strumia
exaly +2 more sources
Goldstone bosons in effective theories with spontaneously broken flavour symmetry [PDF]
Journal of High Energy Physics, 2010 The flavour symmetry of the Standard Model (SM) gauge sector is broken by the fermion Yukawa couplings. Promoting the Yukawa matrices to scalar spurion fields, one can break the flavour symmetry spontaneously by giving appropriate vacuum expectation ...
Th Mannel
exaly +2 more sources
A note on the holography of Chern-Simons matter theories with flavour [PDF]
Journal of High Energy Physics, 2009 We study a three-dimensional = 3 U(N)k × U(N)−k Chern-Simons matter theory with flavour, corresponding to the = 6 Aharony-Bergman-Jafferis-Maldacena CSM theory coupled to 2Nf fundamental fields.
Stefan Hohenegger
exaly +2 more sources