Determining g_{A}/g_{V} with High-Resolution Spectral Measurements Using a LiInSe_{2} Bolometer.

Neutrinoless double beta decay (0νßß) processes sample a wide range of intermediate forbidden nuclear transitions, which may be impacted by quenching of the axial vector coupling constant (g_{A}/g_{V}), the uncertainty of which plays a pivotal role in determining the sensitivity reach of 0νßß experiments. In this Letter, we present measurements performed on a high-resolution LiInSe_{2} bolometer in a "source=detector" configuration to measure the spectral shape of the fourfold forbidden ß decay of ^{115}In. The value of g_{A}/g_{V} is determined by comparing the spectral shape of theoretical predictions to the experimental ß spectrum taking into account various simulated background components as well as a variety of detector effects. We find evidence of quenching of g_{A}/g_{V} at >5σ with a model-dependent quenching factor of 0.655±0.002 as compared to the free-nucleon value for the interacting shell model. We also measured the ^{115}In half-life to be [5.18±0.06(stat)_{-0.015}^{+0.005}(sys)]×10^{14} yr within the interacting shell model framework. This Letter demonstrates the power of the bolometeric technique to perform precision nuclear physics single-ß decay measurements, which along with improved nuclear modeling can help reduce the uncertainties in the calculation of several decay nuclear matrix elements including those used in 0νßß sensitivity calculations.

First Germanium-Based Constraints on Sub-MeV Dark Matter with the EDELWEISS Experiment.

We present the first Ge-based constraints on sub-MeV/c^{2} dark matter (DM) particles interacting with electrons using a 33.4 g Ge cryogenic detector with a 0.53 electron-hole pair (rms) resolution, operated underground at the Laboratoire Souterrain de Modane. Competitive constraints are set on the DM-electron scattering cross section, as well as on the kinetic mixing parameter of dark photons down to 1 eV/c^{2}. In particular, the most stringent limits are set for dark photon DM in the 6 to 9 eV/c^{2} range. These results demonstrate the high relevance of Ge cryogenic detectors for the search of DM-induced eV-scale electron signals.

[A conservative Taylor's method in the treatment of peptic perforation]. / Il metodo conservativo di Taylor nel trattamento della perforazione peptica.

Forty-eight patients affected by perforated ulcer and treated with Taylor's method are examined. Non-operative therapy was successful in forty-two patients; six patients subsequently underwent surgery. All forty-eight patients recovered. The Taylor method is effective in selected cases and represents a therapeutic option which may integrate surgery.

Carcinoma of the rectum: factors influencing the prognosis.

Three hundred and thirty one patients with cancer of the rectum and rectosigmoid junction, operated on during the period 1968-1985 are here examined. The study shows the prognostic value and the impact that stage, histopathological grade, number and location of nodal metastases, morphology of the primary tumour, occurrence of obstruction, perforation, and haemorrhage have on the natural history of the tumour. Stage and histopathologic grading resulted as the most outstanding prognostic parameters also because they are correlated to the presence, number, and location of nodal metastases as well as occurrence of obstruction, perforation and haemorrhage. The study concludes that: a) stage according to the Dukes-Gabriel classification still has a reliable prognostic predictivity, since it faithfully reflects major anatomic situations observed in rectal cancer; b) Dukes' stage C cases should be considered as a non-homogeneous group with a distinct biological behaviour depending on the number and site of the lymph nodes involved; c) intraoperative staging of the tumour, if possible, should guide the excision extent on a curative aim, where the term means a prospective evaluation based on statistical data correlating stage and survival.

[Iatrogenic ruptures of the stomach]. / Le rotture iatrogene dello stomaco.

A case iatrogenic rupture of the stomach due to gastric wash carried out to treat a child of 5 yrs who had swallowed antineuralgic tablets is reported. This is the first reported case. It is concluded that all instrumental techniques should be carried out with maximum caution and delicacy.