Results 11 to 20 of about 73,713 (196)
Precision Flavour Physics and Supersymmetry [PDF]
Physics Reports, 1999 We review the salient features of a comparative study of the profile of the CKM unitarity triangle, and the resulting CP-violating phases $\alpha$, $\beta$ and $\gamma$ in B decays, in the standard model and in several variants of the minimal ...
Ali, Ahmed, London, David
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Natural suppression of flavour-changing neutral currents in supersymmetric gauge theories
Nuclear Physics B, 1982 Abstract Induced flavour-changing neutral currents (FCNC) in supersymmetric unified theories are investigated both in models with the standard SU(2)L × U(1) gauge symmetry and in models with an extra Ũ(1) gauge symmetry. Supersymmetric extension of the natural flavour conservation laws for neutral currents is obtained by adding a condition regarding ...
T. Inami, C.S. Lim
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Minimal flavour deconstruction
Journal of High Energy PhysicsWe 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
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Generalised CP symmetry in modular-invariant models of flavour
Journal of High Energy Physics, 2019 The formalism of combined finite modular and generalised CP (gCP) sym-metries for theories of flavour is developed. The corresponding consistency conditions for the two symmetry transformations acting on the modulus τ and on the matter fields are derived.
P.P. Novichkov +3 more
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Minimally modified Fritzsch texture for quark masses and CKM mixing
Journal of High Energy Physics, 2023 The Standard Model does not constrain the form of the Yukawa matrices and thus the origin of fermion mass hierarchies and mixing pattern remains puzzling.
Benedetta Belfatto, Zurab Berezhiani
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Common origin of θ 13 and dark matter within the flavor symmetric scoto-seesaw framework
Journal of High Energy Physics, 2022 To understand the observed pattern of neutrino masses and mixing as well as to account for the dark matter we propose a hybrid scoto-seesaw model based on the A 4 discrete flavor symmetry.
Joy Ganguly +2 more
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Flavour-symmetry correction to the ``naive'' Zweig rule for the scalar-meson flavour-singlet [PDF]
, 1999 We present flavour-symmetric couplings for the OZI-allowed three-meson vertices of effective meson theories, which for the case of the two-meson channels to which the flavour-singlet scalar meson couples, are endowed with a correction factor with respect
Abe, Eef van Beveren, George Rupp
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Constraining flavour patterns of scalar leptoquarks in the effective field theory [PDF]
Journal of High Energy Physics, 2021 Abstract We investigate the viability of extending the Standard Model with S1 and S3 scalar leptoquarks when the flavour structure is parametrized in terms of Froggatt-Nielsen charges. In contrast to a similar analysis with a vector leptoquark, we find essentially two solutions for the charges that fit the experimental constraints,
Marzia Bordone +3 more
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Adding flavour to twistor strings [PDF]
, 2007 Twistor string theory is known to describe a wide variety of field theories at tree-level and has proved extremely useful in making substantial progress in perturbative gauge theory.
Badger S D +16 more
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Wrinkles in the Froggatt-Nielsen mechanism and flavorful new physics
Journal of High Energy Physics, 2023 When the Froggatt-Nielsen mechanism is used to explain the Standard Model flavor hierarchy, new physics couplings are also determined by the horizontal symmetry.
Pouya Asadi +4 more
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