Zobrazeno 1 - 10
of 135
pro vyhledávání: '"Catà, Oscar"'
Autor:
Cata, Oscar
I review recent developments in rare and radiative kaon decays from the theory side, with emphasis on those modes that are actively analyzed by the experimental collaborations.
Comment: 8 pages. Proceedings of the event "A Virtual Tribute to Qua
Comment: 8 pages. Proceedings of the event "A Virtual Tribute to Qua
Externí odkaz:
http://arxiv.org/abs/2112.15128
We evaluate the contribution of scalar mesons to the hadronic light-by-light piece of the muon anomalous magnetic moment, using a warped five-dimensional model and holographic methods. We assess the contribution of the lightest, sub-GeV scalars $\sig
Externí odkaz:
http://arxiv.org/abs/2110.05962
If the Standard Model is understood as the first term of an effective field theory, the anomaly-cancellation conditions have to be worked out and fulfilled order by order in the effective field-theory expansion. We bring attention to this issue and s
Externí odkaz:
http://arxiv.org/abs/2011.09976
We investigate the viability of extending the Standard Model with $S_1$ and $S_3$ 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
Externí odkaz:
http://arxiv.org/abs/2010.03297
Publikováno v:
Phys. Rev. D 102, 016009 (2020)
Despite recent developments, there are a number of conceptual issues on the hadronic light-by-light (HLbL) contribution to the muon $(g-2)$ which remain unresolved. One of the most controversial ones is the precise way in which short-distance constra
Externí odkaz:
http://arxiv.org/abs/1912.02779
Extending the Standard Model with higher-dimensional operators in an effective-field-theory (EFT) approach provides a systematic framework to study new-physics (NP) effects from a bottom-up perspective, as long as the NP scale is sufficiently large c
Externí odkaz:
http://arxiv.org/abs/1910.02641
Publikováno v:
PoS(CD2018)072
The electroweak sector of the Standard Model can be formulated in a way similar to Chiral Perturbation Theory (ChPT), but extended by a singlet scalar. The resulting effective field theory (EFT) is called Higgs-Electroweak Chiral Lagrangian (EWCh$\ma
Externí odkaz:
http://arxiv.org/abs/1907.07605
Autor:
Cata, Oscar, Mueller, Christoph
There are indications that some theories with spontaneous symmetry breaking also feature a light scalar in their spectrum, with a mass comparable to the one of the Goldstone modes. In this paper, we perform the one-loop renormalization of a theory of
Externí odkaz:
http://arxiv.org/abs/1906.01879
Autor:
Cata, Oscar, Mannel, Thomas
Hints of violation of lepton flavor universality in semileptonic $B$ decays have prompted a renewed interest in leptoquarks at the low TeV scale. Among the different scenarios suggested, some happen to violate also lepton number, yet not much attenti
Externí odkaz:
http://arxiv.org/abs/1903.01799
We point out that, given the current experimental status of radiative kaon decays, a subclass of the ${\cal O} (p^4)$ counterterms of the weak chiral lagrangian can be determined in closed form. This involves in a decisive way the decay $K^\pm \to \p
Externí odkaz:
http://arxiv.org/abs/1712.10270