Zobrazeno 1 - 10
of 132
pro vyhledávání: '"Vecchi, Luca"'
Autor:
Agashe, Kaustubh, Du, Peizhi, Ekhterachian, Majid, Fong, Chee Sheng, Hong, Sungwoo, Vecchi, Luca
We study the generation of the baryon asymmetry in Composite Higgs models with partial compositeness of the Standard Model (SM) fermions and heavy right-handed neutrinos, developing for the first time a complete picture of leptogenesis in that setup.
Externí odkaz:
http://arxiv.org/abs/2410.00960
Autor:
Ruiz, Pablo Olgoso, Vecchi, Luca
Dimensional regularization is arguably the most popular and efficient scheme for multi-loop calculations. Yet, when applied to chiral (gauge) theories like the Standard Model and its extensions, one is forced to deal with the infamous "$\gamma_5$ pro
Externí odkaz:
http://arxiv.org/abs/2406.17013
We analyze a large class of four-dimensional $\mathcal{N}=1$ low-energy realizations of the axiverse satisfying various quantum gravity constraints. We propose a novel upper bound on the ultimate UV cutoff of the effective theory, namely the species
Externí odkaz:
http://arxiv.org/abs/2404.14489
We explore flavor dynamics in the broad scenario of a strongly interacting light Higgs (SILH). Our study focuses on the mechanism of partial fermion compositeness, but is otherwise as systematic as possible. Concretely, we classify the options for th
Externí odkaz:
http://arxiv.org/abs/2402.09503
Autor:
Valenti, Alessandro, Vecchi, Luca
Non-perturbative results in QCD-like theories can be derived employing positivity of the Euclidean path integral measure, as pioneered by Weingarten, Vafa, Witten. We show that positivity of the measure can be generalized to parity-invariant theories
Externí odkaz:
http://arxiv.org/abs/2306.13088
Autor:
Valenti, Alessandro, Vecchi, Luca
We argue that in general renormalizable field theories the topological angles may develop an additive beta function starting no earlier than 2-loop order. The leading expression is uniquely determined by a single model-independent coefficient. The as
Externí odkaz:
http://arxiv.org/abs/2210.09328
We present a model that solves the strong CP problem via an axion parametrically heavier than the standard one. Within this picture the Standard Model quarks are embedded into a larger non-abelian Grand Color group that at high scales splits into ord
Externí odkaz:
http://arxiv.org/abs/2206.04077
We derive the finite one-loop counterterm required to restore the Ward Identities broken by the regularization scheme in chiral gauge theories. Our result is an analytic expression applicable to a wide class of regularizations satisfying a few genera
Externí odkaz:
http://arxiv.org/abs/2205.10381
Autor:
Vecchi, Luca
Composite axion scenarios offer a robust field theoretic justification for the existence of a Peccei-Quinn symmetry of high quality. We present a new class of realizations that are naturally embedded in Grand-Unified Theories, retain asymptotic freed
Externí odkaz:
http://arxiv.org/abs/2106.15224
Autor:
Valenti, Alessandro, Vecchi, Luca
Solutions of the Strong CP Problem based on the spontaneous breaking of CP must feature a non-generic structure and simultaneously explain a coincidence between a priori unrelated CP-even and CP-odd mass scales. We show that these properties can emer
Externí odkaz:
http://arxiv.org/abs/2106.09108