250 citations · 3.1k across the 50 of their papers we have counts for
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ALP production in Lepton Flavour Violating meson, tau and gauge boson decays
Marco Ardu, Lorenzo Calibbi, Marco Fedele +1
In this paper we study axion-like particles (ALPs) with lepton-flavour-violating (LFV) couplings in the mass regime above the muon threshold, , where the strong bound from…
Fresh look at the diffuse ALP background from supernovae
Francisco R. Candón, Sougata Ganguly, Maurizio Giannotti +3
Protoneutron stars, highly compact objects formed in the core of exploding supernovae (SNe), are powerful sources of axion-like particles (ALPs). In the SN core, ALPs are dominantl…
High-quality Peccei-Quinn symmetry from the interplay of vertical and horizontal gauge symmetries
Luca Di Luzio, Giacomo Landini, Federico Mescia +1
We explore a class of axion models where an accidental Peccei-Quinn (PQ) symmetry automatically emerges from the interplay of vertical (grand-unified) and horizonta…
Accommodating scalar resonances in the HEFT
Iñigo Asiáin, Domènec Espriu, Federico Mescia
Loss of unitarity in an effective field theory is often cured by the appearance of dynamical resonances, revealing the presence of new degrees of freedom. These resonances may mani…
Axion-induced pair production: a new strategy for axion detection
Fernando Arias-Aragón, Maurizio Giannotti, Giovanni Grilli di Cortona +1
We revisit and update the axion-induced pair production process in a nuclear electric field mediated by the axion-electron coupling, $a+{{}^{A}_{Z}X} \rightarrow {{}^{A}_{Z}X} + e^…
Do Finite Density Effects Jeopardize Axion Nucleophobia in Supernovae?
Luca Di Luzio, Vincenzo Fiorentino, Maurizio Giannotti +2
Nucleophobic axion models, wherein axion couplings to both protons and neutrons are simultaneously suppressed, can relax the stringent constraints from SN 1987A. However, it remain…
Dark Matter Direct Detection in -channel mediator models
Giorgio Arcadi, David Cabo-Almeida, Federico Mescia +1
We perform a comprehensive study of the Direct Detection phenomenology of singlet Dark Matter -channel portal models. For that purpose, we present a complete one-loop matching o…
Accommodating the H in the HEFT
Iñigo Asiáin, Domènec Espriu, Federico Mescia
Loss of unitarity in an effective field theory is often cured by the appearance of dynamical resonances, revealing the presence of new degrees of freedom. These resonances may mani…
Running effects on QCD axion phenomenology
Luca Di Luzio, Maurizio Giannotti, Federico Mescia +3
We study the impact of renormalization group effects on QCD axion phenomenology. Focusing on the DFSZ model, we argue that the relevance of running effects for the axion couplings…
Introducing tools to test Higgs interactions via scattering II: the coupled channel formalism and scalar resonances
Iñigo Asiáin, Domènec Espriu, Federico Mescia
In this work we explore in detail the presence of scalar resonances in fusion process in the context of the LHC experiments working in the theoretical framework provided by Hi…
Global Fit of Modified Quark Couplings to EW Gauge Bosons and Vector-Like Quarks in Light of the Cabibbo Angle Anomaly
Andreas Crivellin, Matthew Kirk, Teppei Kitahara +1
There are two tensions related to the Cabibbo angle of the CKM matrix. First, the determinations of from , , and decays disagree at the level.…
Renormalization group effects in astrophobic axion models
Luca Di Luzio, Federico Mescia, Enrico Nardi +1
It has been recently pointed out that in certain axion models it is possible to suppress simultaneously both the axion couplings to nucleons and electrons, realising the so-called…
anomalies and muon from Dark Matter
Giorgio Arcadi, Lorenzo Calibbi, Marco Fedele +1
Motivated by the result of the Muon g-2 experiment and the long-standing anomalies in semileptonic meson decays, we systematically build a class of minimal models that can addr…
Stellar Evolution confronts Axion Models
Luca Di Luzio, Marco Fedele, Maurizio Giannotti +2
Axion production from astrophysical bodies is a topic in continuous development, because of theoretical progress in the estimate of stellar emission rates and, especially, because…
Introducing tools to test Higgs interactions via scattering I: one-loop calculations and renormalization in the HEFT
Iñigo Asiáin, Domènec Espriu, Federico Mescia
Effective field theories are useful tools to search for physics beyond the Standard Model (SM). However, effective theories can lead to non-unitary behavior with fastly growing amp…
What is the scale of new physics behind the muon ?
Lukas Allwicher, Luca Di Luzio, Marco Fedele +2
We study the constraints imposed by perturbative unitarity on the new physics interpretation of the muon anomaly. Within a Standard Model Effective Field Theory (SMEFT) appro…
Muon and -anomalies from Dark Matter
Giorgio Arcadi, Lorenzo Calibbi, Marco Fedele +1
In the light of the recent result of the Muon g-2 experiment and the update on the test of lepton flavour universality published by the LHCb collaboration, we systematically…
Systematic approach to -physics anomalies and -channel dark matter
Giorgio Arcadi, Lorenzo Calibbi, Marco Fedele +1
We study renormalisable models with minimal field content that can provide a viable Dark Matter candidate through the standard freeze-out paradigm and, simultaneously, accommodate…
Solar axions cannot explain the XENON1T excess
Luca Di Luzio, Marco Fedele, Maurizio Giannotti +2
We argue that the interpretation in terms of solar axions of the recent XENON1T excess is not tenable when confronted with astrophysical observations of stellar evolution. We discu…
Covert symmetries in the neutrino mass matrix
Fredrik Björkeroth, Luca Di Luzio, Federico Mescia +1
The flavour neutrino puzzle is often addressed by considering neutrino mass matrices with a certain number of vanishing entries ( for some values of the indices), sin…
New physics in transitions at one loop
Rupert Coy, Michele Frigerio, Federico Mescia +1
We investigate new-physics contributions to transitions in the context of an effective field theory extension of the Standard Model, including operator mixing at…
Axion-electron decoupling in nucleophobic axion models
Fredrik Björkeroth, Luca Di Luzio, Federico Mescia +3
The strongest upper bounds on the axion mass come from astrophysical observations like the neutrino burst duration of SN1987A, which depends on the axion couplings to nucleons, or…
Physics potential of the International Axion Observatory (IAXO)
E. Armengaud, D. Attie, S. Basso +88
We review the physics potential of a next generation search for solar axions: the International Axion Observatory (IAXO). Endowed with a sensitivity to discover axion-like particle…
Generic Loop Effects of New Scalars and Fermions in , and a Vector-like Generation
Pere Arnan, Andreas Crivellin, Marco Fedele +1
In this article we investigate in detail the possibility of accounting for the and anomalies via loop contributions involving with new scalars and fe…