Results 51 to 60 of about 77,712 (368)
Leading logarithms in N-flavour mesonic Chiral Perturbation Theory [PDF]
Nuclear Physics B, 2013 We extend earlier work on leading logarithms in the massive nonlinear O(n) sigma model to the case of SU(N)xSU(N)/SU(N) which coincides with mesonic chiral perturbation theory for N flavours of light quarks. We discuss the leading logarithms for the mass and decay constant to six loops and for the vacuum expectation value to seven loops.
Johan Bijnens, Karol Kampf, Stefan Lanz
openalex +5 more sources
Heavy flavours: theory summary [PDF]
AIP Conference Proceedings, 2005 6 pages. Talk given at DIS 2005, XIII Workshop on Deep Inelastic Scattering, April 27-May 1, 2005, Madison, WI, U.S ...
openaire +4 more sources
Quarks at the modular S 4 cusp
Journal of High Energy Physics, 2023 We analyse the possibility of describing quark masses, mixing and CP violation in S 4 ′ $$ {S}_4^{\prime } $$ modular flavour models without flavons. We focus on the case where the closeness of the modulus to the point of residual ℤ 3 ST $$ {\mathbb{Z ...
I. de Medeiros Varzielas +3 more
doaj +1 more source
Flavour changes in locally supersymmetric theories
Physics Letters B, 1983 Abstract Locally supersymmetric models lead in general to flavour-changing gluino exchanges. We derive the necessary expressions for describing them in detail. We show that the K 0 K 0 mixing puts a lower bound on the gravitino mass and gives new restrictions on the Kobayashi-Maskawa angles.
J. Donoghue, H. Nilles, D. Wyler
semanticscholar +4 more sources
Particle asymmetries in the early universe [PDF]
, 2010 The total lepton asymmetry $l=\sum_f l_f$ in our universe is only poorly constrained by theories and experiments. It might be orders of magnitudes larger than the observed baryon asymmetry $b\simeq {\cal O}(10^{-10})$, $|l|/b \leq {\cal O}(10^{9})$.
Boeckel +19 more
core +1 more source
Flavour-symmetry correction to the ``naive'' Zweig rule for the scalar-meson flavour-singlet [PDF]
, 1999 We present flavour-symmetric couplings for the OZI-allowed three-meson vertices of effective meson theories, which for the case of the two-meson channels to which the flavour-singlet scalar meson couples, are endowed with a correction factor with respect
Abe, Eef van Beveren, George Rupp
core +2 more sources
Can leptonic mixing matrix have a Wolfenstein form?
Journal of High Energy Physics, 2023 We analyze the possibility of the leptonic mixing matrix having a Wolfenstein form at the Grand Unified Theory scale. The renormalization group evolution of masses and mixing angles from the high scale to electroweak scale, in certain new physics ...
Ankur Panchal +2 more
doaj +1 more source
Journal of High Energy Physics, 2023 We construct an SU(5) grand unified model in which the hierarchies of the quark and lepton masses and mixing are explained by the Γ 6 ′ $$ {\Gamma}_6^{\prime } $$ modular flavor symmetry.
Yoshihiko Abe +3 more
doaj +1 more source
CKM substructure from the weak to the Planck scale
Journal of High Energy Physics, 2022 We look for relations among CKM matrix elements that are not consequences of the Wolfenstein parametrization. In particular, we search for products of CKM elements raised to integer powers that approximately equal 1.
Yuval Grossman +3 more
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