Zobrazeno 1 - 10
of 30
pro vyhledávání: '"de Giorgi, Arturo"'
We present a model where a GeV axion-like-particle (ALP) is predicted in a large portion of the parameter space due to the presence of explicit Peccei-Quinn symmetry-breaking terms in an exotic leptonic sector. The latter provides a solution to the m
Externí odkaz:
http://arxiv.org/abs/2411.18246
Autor:
de Giorgi, Arturo, Jaeckel, Joerg
Ordinary matter coupled to light weakly interacting bosons can lead to the formation of a macroscopic bosonic field in the vicinity of large matter concentrations such as ordinary or neutron stars. When these objects are turned into black holes due t
Externí odkaz:
http://arxiv.org/abs/2408.10296
Axion-like particles (ALPs) and heavy neutral leptons (HNLs) are two well-motivated classes of particles beyond the Standard Model. It is intriguing to explore the new detection opportunities that may arise if both particle types coexist. Part of the
Externí odkaz:
http://arxiv.org/abs/2407.14970
Publikováno v:
JHEP 03 (2024) 094
A convincing explanation of the smallness of neutrino masses is represented by the Type-I Seesaw mechanism, where the two measured neutrino mass differences can be generated by introducing at least two right-handed neutrinos. In an ultraviolet comple
Externí odkaz:
http://arxiv.org/abs/2312.13417
With no evidence of any exotic particle detected so far beyond the Standard Model, the new physics may lie above the presently accessible energies at colliders and, at low-energies, can be accounted for via an effective description. The interplay of
Externí odkaz:
http://arxiv.org/abs/2304.10560
Axion-like particles (ALPs) and heavy neutral leptons (HNLs) are both well-motivated extensions of the Standard Model. As ALPs couple to on-shell fermions proportionally to their masses, processes involving both types of particles may give rise, for
Externí odkaz:
http://arxiv.org/abs/2212.11290
Autor:
de Giorgi, Arturo, Piazza, Gioacchino
Within the assumption of Left-Handed (LH) New Physics (NP), we review the relations between $\mathcal{B}(B\to K^{(\ast)} \tau^+\tau^-)$ and $\mathcal{B}(B\to K^{(\ast)} \nu\bar \nu)$ for several Beyond the Standard Model (BSM) scenarios, commonly con
Externí odkaz:
http://arxiv.org/abs/2211.05595
The neutral $B$-anomalies are analysed in terms of the tree-level exchange of a (pseudo)scalar gauge singlet $a$. Solutions to both $R_{K^{(*)}}$ central bin anomalies are found within $1\sigma$ for ${m_{a}^2 \in [{1.1},\,{6}]\,\text{GeV}^2}$, while
Externí odkaz:
http://arxiv.org/abs/2211.05135
The recent CDF-II measurement of the $W$-boson mass shows a strong tension with the corresponding Standard Model prediction. Once active neutrino masses are explained in the context of the Low-Scale Seesaw mechanisms, this tension can be resolved. We
Externí odkaz:
http://arxiv.org/abs/2211.03797
Autor:
de Giorgi, Arturo, Vogl, Stefan
We study the freeze-in of gravitationally interacting dark matter in extra dimensions. Focusing on a minimal dark matter candidate that only interacts with the SM via gravity in a five-dimensional model we find that a large range of dark matter and K
Externí odkaz:
http://arxiv.org/abs/2208.03153