1,354,372 research outputs found
New Constraints on Dark Matter Effective Theories from Standard Model Loops
No full textWe consider an effective field theory for a gauge singlet Dirac dark matter particle interacting with the standard model fields via effective operators suppressed by the scale Λ≳1 TeV. We perform a systematic analysis of the leading loop contributions to spin-independent Dirac dark matter–nucleon scattering using renormalization group evolution between Λ and the low-energy scale probed by direct detection experiments. We find that electroweak interactions induce operator mixings such that operators that are naively velocity suppressed and spin dependent can actually contribute to spin-independent scattering. This allows us to put novel constraints on Wilson coefficients that were so far poorly bounded by direct detection. Constraints from current searches are already significantly stronger than LHC bounds, and will improve in the near future. Interestingly, the loop contribution we find is isospin violating even if the underlying theory is isospin conserving
I REATI TRIBUTARI TRA VECCHIE E NUOVE ISTANZE PREVENTIVE
No full textThis work analyzes the Italian tax offences’ system, regulated by d.lgs. n. 74/2000, and underlines how the urgent need for "fiscal security" has influenced the most recent legislative and court decisions involving criminal tax matters.
It is generally known, how the negative value of economic crimes – and consequently of fiscal crimes – is not fully perceived by citizens, because those kinds of infringements are considered as events far away from their individual needs. For this reason they are not fully highlighted by the medias which are more interested in pursuing other areas of judicial chronicle. For this reason, criminal law of economics – historically characterized by a certain degree of specialty area to the general rules laid down by the penal code – saw sectoral reforms, sometimes ending up to real forms of decriminalization, which are not justified given the importance of the legal protected asset.
Criminal tax law, in an apparent alienation from other areas of criminal law, had the uneasy task to protect tax interests, after abandoning the offences repression logic of the tax evasion in the previous law n. 516/1982.
Legislative power, in accordance with doctrine, had decided to split tax evasion in two main categories:
1) the so-called "great evasion", mainly considered in criminal cases contained in d.lgs. n. 74, regards unlawful conduct, in particular detrimental tax interests;
2) the so-called "small and medium evasion" on tax discipline breaches subject to administrative sanctions. Although decreasing tax income, this kind of evasion would not be detrimental to public finances as criminal tax evasion would be.
However this elaborate system – certainly in conformity with the General principles – doesn't seem to have reached the desired results. The current unfavourable economic environment has highlighted the limits of tax legislation and, consequently, of its related sanctions, despite the innovations that have improved the efficiency of financial Administration.
Therefore, in an attempt to fight tax evasion there has been a dual outcome:
a) on one hand, jurisprudence has extensively interpreted criminal law, getting to use in some cases the analogy in malam partem of penal precept;
b) on the other hand, legislators have recently intervened by modifying the original structure of the above cited decree n. 74, setting new cases and heavier sanctions. These initiatives although sharable in their goal, raise doubts in the doctrine.
The aim of this writing is to illustrate the evolution of criminal tax matters, with a particular focus on how the legislative power and the jurisprudence have reformulated, in terms of penalties, some of the institutes and cases contained in d.lgs. n. 74/2000
Matching of gauge invariant dimension-six operators for b -> s and b -> c transitions
No full textNew physics realized above the electroweak scale can be encoded in a model independent way in the Wilson coefficients of higher dimensional operators which are invariant under the Standard Model gauge group. In this article, we study the matching of the SU(3)(C) x SU(2)(L) x U(1)(Y) gauge invariant dimension-six operators on the standard B physics H(a)miltonian relevant for b -> s and b -> c transitions. The matching is performed at the electroweak scale (after spontaneous symmetry breaking) by integrating out the top quark, W, Z and the Higgs particle. We first carry out the matching of the dimension-six operators that give a contribution at tree level to the low energy Hamiltonian. In a second step, we identify those gauge invariant operators that do not enter b -> s transitions already at tree level, but can give relevant one-loop matching effects
Idee diverse di libertà: letture 'politiche' del pensiero di Benjamin Constant nell’Italia della Resistenza e dell'immediato dopoguerra
No full textIl saggio ricostruisce le diverse interpretazioni del pensiero politico di Constant in Italia tra il 1943 e il 1946: intellettuali di diversa ispirazione e riconducibili a differenti forze politiche attribuiscono al liberalismo constantiano un significato diverso a seconda della propria sensibilità e degli obiettivi politici che intendono perseguire
Combined orthodontic and surgical treatment supported by virtual planning in a severe mandibular asymmetry: A case report
No full textThis article describes the complex dental treatment of a 17-year-old girl with skeletal Class I, severe mandibular asymmetry, maxillary retrusion, normodivergent pattern, left canine and molar Class II, canting of the occlusal plane, lateral left cross-bite, deep bite, upper and lower incisors retrusion and an increased curve of Spee. To achieve optimal results, a multidisciplinary approach to treatment was adopted involving orthodontics and maxillofacial surgery. The surgical phase was supported by virtual surgical planning with dedicated software. Thanks to the development of the three-dimensional radiological findings, a visualization and an accurate simulation of all the surgery-steps help to determine reproducibly and with high precision the best adjustments to do. Firstly, the excessive curve of Spee, the incisors retrusion and the deep bite were corrected with orthodontic treatment. The surgical treatment plan consisted of a palatal expansion, maxillary advancement, zygomatic grafts, bilateral sagittal osteotomy for mandibular correction and genioplasty. Orthodontic treatment was continued to finish with all the objectives achieved. After two years, the patient was satisfied with her facial and dental treatment results and with her oral function as well
Chiral Enhancement in the MSSM: An Overview
No full textIn this article I review the origin and the effects of chirally enhanced loop-corrections in the MSSM based on previous papers. Chiral enhancement is related to fermion-Higgs couplings (or self-energies when the Higgs field is replaced by its vev). I describe the resummation of these chirally-enhanced corrections to all orders in perturbation theory and the calculation of the effective fermion-Higgs
and gaugino (higgsino)-fermion vertices. As an application a model with radiative flavor-violation is discussed which can solve the SUSY-CP and the SUSY-flavor problem while it is still capable of explaining the observed deviation from the SM in the Bs − Bs mixing phase
Rare decays and MSSM phenomenology
No full textIn this article I review some aspects of flavour phenomenology in the MSSM. After an overview of various flavour observables I discuss the constraints on the off-diagonal elements of the squark mass matrices. In this context I present the Fortran code SUSY_FLAVOR which calculates these processes in the generic MSSM including the complete resummation of all chirally enhanced effects as a new feature of version 2. Than I discuss where large new physics effects in the MSSM are still possible. As an example of a model which can give large effects in flavour physics I review a model with "radiative flavour violation" (RFV) and update the results in the light of the recent LHCb measurement of Bs -> \mu \mu. Finally, I recall that the MSSM can generate a sizable right-handed W-coupling which affects B -> \tau\nu and can solve the Vub problem
Middle phalanx maturation of the third finger (MPM) method in the evaluation of skeletal age in a growing orthodontic patient
No full textGoing Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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