Search for Leptonic Decays of Dark Photons at NA62.

The NA62 experiment at CERN, configured in beam-dump mode, has searched for dark photon decays in flight to electron-positron pairs using a sample of 1.4×10^{17} protons on dump collected in 2021. No evidence for a dark photon signal is observed. The combined result for dark photon searches in lepton-antilepton final states is presented and a region of the parameter space is excluded at 90% confidence level, improving on previous experimental limits for dark photon mass values between 50 and 600 MeV/c^{2} and coupling values in the range 10^{-6} to 4×10^{-5}. An interpretation of the e^{+}e^{-} search result in terms of the emission and decay of an axionlike particle is also presented.

Search for Lepton Number and Flavor Violation in K

Searches for the lepton number violating K^{+}→π^{-}µ^{+}e^{+} decay and the lepton flavor violating K^{+}→π^{+}µ^{-}e^{+} and π^{0}→µ^{-}e^{+} decays are reported using data collected by the NA62 experiment at CERN in 2017-2018. No evidence for these decays is found and upper limits of the branching ratios are obtained at 90% confidence level: B(K^{+}→π^{-}µ^{+}e^{+})<4.2×10^{-11}, B(K^{+}→π^{+}µ^{-}e^{+})<6.6×10^{-11} and B(π^{0}→µ^{-}e^{+})<3.2×10^{-10}. These results improve by 1 order of magnitude over previous results for these decay modes.

[Congenital factor V deficiency and intraventricular hemorrhage of prenatal origin]. / Deficit congenito di fattore V ed emorragia intraventricolare di origine prenatale.

The Authors describe a case of congenital coagulation factor V deficiency with severe prenatal intraventricular hemorrhage. Factor V is an essential enzyme catalysing the process of thrombin generation. Low levels of enzyme were also found in both parents, who demonstrate subclinic alterations of coagulation parameters. The severe deficiency of factor V in the newborn (8%) caused frequent and severe intracranial and gastric hemorrhages that brought newborn to death in few weeks.

[William-Beuren syndrome: description of a case]. / Sindrome di William-Beuren: descrizione di un caso.

The Authors describe a case of William-Beuren Syndrome, also know as "Fanconi-Schlesinger Syndrome" or "Idiopathic Hypercalcaemia, supravalvular aortic stenosis, elfin facies syndrome". Irritability and chronic constipation are early features. Hypercalcaemia may occur in infancy but rarely after 1 year age. The facies is characteristic. Supravalvular aortic stenosis is the most frequent cardiac abnormality. Other common features are short stature, mental retardation and significant behavioural disorders. In this case report typical facies, short stature, behavioural disorders are associated with epilepsy in early years of life. Hypercalcaemia or cardiovascular malformation were not found.

[Hypohidrotic ectodermal dysplasia syndrome. Description of a clinical case]. / La sindrome della displasia ectodermica ipoidrotica. Descrizione di un caso clinico.

A case of Hypohidrotic Ectodermal Dysplasia is reported. Inability of sweating is associated with characteristic craniofacial anomalies, oligo-anodontia and rare, thin hair. X-linked and autosomal inheritance are both supposed.

Effect of a single daily dose treatment of fenofibrate on plasma lipoproteins in hyperlipoproteinaemia IIb.

The safety and efficacy of a single daily dose of fenofibrate (200 mg) have been evaluated in 12 Type IIB hyperlipidaemic patients in a three-month study. At the same time the pharmacokinetics was studied to check whether this new dosage schedule would give a therapeutic plasma levels of fenofibrate. At the single daily dose of 200 mg, fenofibrate was highly effective, very well tolerated, and it reached therapeutic plasma levels without accumulation. It appears that fenofibrate can usefully be employed at this dosage in hyperlipidaemia, especially since patient compliance is better when only one daily dose need be taken.