1,721,063 research outputs found
Theoretical review on lepton flavour violation
Full text linkThe synergy and interplay of high energy data with flavour precision data are expected to shed some light on the “Flavour Problem”. Lepton flavor violating processes like μ → eγ represent “golden channels” where to look for New Physics effects, given their high New Physics sensitivity and the outstanding experimental progress we expect in the upcoming years. If LFV is observed, the next
crucial step will be to trace back the New Physics model at work by means of a correlated analysis of various observables
Flavor physics in and after the LHC era
Full text linkWe present a concise review of the status of flavor physics emphasizing that the current experimental resolutions are already testing territories of new physics models well beyond the LHC reach. The synergy and interplay among the
LHC and high-precision low-energy experiments is our best chance to learn more about the origin of both electroweak and flavor symmetry breaking
Probing supersymmetric grand unification through flavor physics
No full textFlavor Changing Neutral Current (FCNC) and CP violating processes are a powerful tool to probe the Standard Model (SM) and, hence, to constrain or obtain indirect hints of New Physics (NP) beyond it. Within Supersymmetric Grand Unified theories it is generally possible to link processes occurring in the leptonic and hadronic sectors; thus, their correlated analysis provides a very interesting low energy test for a Grand Unified theory at high energies. Similarly to the FCNC decays, we also show that the Lepton Flavor Universality tests in low-energy systems (Kl 2 and πl 2) offer a unique opportunity in shedding light on physics beyond the Standard Model; the smallness of NP effects is more than compensated, in terms of NP sensitivity, by the excellent experimental resolution and the good theoretical control. © 2007
Temporal Complexity of a Hopfield-Type Neural Model in Random and Scale-Free Graphs
No full textThe Hopfield network model and its generalizations were introduced as a model of associative, or content-addressable, memory. They were widely investigated both as an unsupervised learning method in artificial intelligence and as a model of biological neural dynamics in computational neuroscience. The complexity features of biological neural networks have attracted the scientific community’s interest for the last two decades. More recently, concepts and tools borrowed from complex network theory were applied to artificial neural networks and learning, thus focusing on the topological aspects. However, the temporal structure is also a crucial property displayed by biological neural networks and investigated in the framework of systems displaying complex intermittency. The Intermittency-Driven Complexity (IDC) approach indeed focuses on the metastability of self-organized states, whose signature is a power-decay in the inter-event time distribution or a scaling behaviour in the related event-driven diffusion processes. The investigation of IDC in neural dynamics and its relationship with network topology is still in its early stages. In this work, we present the preliminary results of an IDC analysis carried out on a bio-inspired Hopfield-type neural network comparing two different connectivities, i.e., scale-free vs. random network topology. We found that random networks can trigger complexity features similar to that of scale-free networks, even if with some differences and for different parameter values, in particular for different noise levels
Exploring the flavour mystery with Roberto
Full text linkIn this contribution we review our research activity with Roberto which focused mainly on the study of New Physics (NP) effects in Lepton Flavour Universality Violating (LFUV) observables such as RK = ε(K → ev)/ ε(K → μv). After reviewing our results, we discuss also the present status of LFUV in semileptonic B decays which is currently hinting to significant NP contributions
La filologia romanza oggi. Atti della giornata di studi in memoria di Aurelio Roncaglia
No full textIl volume raccoglie attraverso una serie di contributi di allievi e colleghi la figura di Aurelio Roncaglia. Contiene un messaggio dell'allora Presidente della Repubblica Carlo Azeglio Ciamp
Prepositionless genitive and N+N compounding in (Old) French and Italian
No full textIn this contribution, four cases of prepositionless genitive assignment are examined: (a) certain alleged cases of N+N composition in Modern Italian that respond positively to important diagnostics for syntactic behavior; (b) the so-called Juxtaposition Genitive widely attested in Old French; (c) the relatively less appreciated presence of some peculiar forms of Juxtaposition Genitive in Old Italian, attested until the end of the 14th century and partially still surviving in certain Central and Southern Italian dialects; (d) the so-called genitive compounds in West-Frisian. The hypotheses formulated in this contribution are potentially relevant for a general theory of genitive assignment and for the study of the interface between syntax and morpholog
Online Communication and Body Language
Full text linkThe COVID-19 emergency brought out the role of online digital technologies. The increase in
online social interactivity was accelerated by social distancing, which has been recognized to have
adverse effects due to physical and emotional isolation (Canet-Juric et al., 2020).
Body language is central to social interactions, and its role is clearly diminished when going
online, but the relevance of this change is still not clear. This transition toward online could affect
the wellness of the people, especially the population with specific fragilities, e.g., young people and
seniors (Beam and Kim, 2020; Canet-Juric et al., 2020; Fernández Cruz et al., 2020).
We here briefly present our viewpoint on some issues concerning changes in body interactions
in online interpersonal communication. Our aim is to encourage constructive discussion and raise
awareness about these very topical issues
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