Tag Archives: Physics

A technological enhanced self-assessment activity to reduce university drop-out

Passage from secondary school to university can be difficult for our students if they are not properly followed by instructors. To curtail the high university drop-out rate detected in various countries, a set of self-assessment activities must be devised by teachers to furnish students an important help in organizing their personal study-method and to gain a proper self-government.

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New results on νμ → ντ appearance with the OPERA experiment in the CNGS beam

The OPERA neutrino experiment is designed to perform the first observation of neutrino oscillations in direct appearance mode in the νμ → ντ channel, via the detection of the τ-leptons created in charged current ντ interactions. The detector, located in the underground Gran Sasso Laboratory, consists of an emulsion/lead target with an average mass of about 1.2 kt, complemented by electronic detectors. It is exposed to the CERN Neutrinos to Gran Sasso beam, with a baseline of 730 km and a mean energy of 17 GeV. The observation of the first ντ candidate event and the analysis of the 2008-2009 neutrino sample have been reported in previous publications. This work describes substantial improvements in the analysis and in the evaluation of the detection efficiencies and backgrounds using new simulation tools. (…)

@ The authors. Article first published in JHEP11 (2013) 036, and erratum JHEP04 (2014) 014, distributed under the terms of the Creative Commons Attribution License (CC-BY 4.0), https://creativecommons.org/licenses/by/4.0/

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Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC

CMS Collaboration

Results are presented from searches for the standard model Higgs boson in proton–proton collisions at  √√s=7 and 8 TeV in the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC), using data samples corresponding to integrated luminosities of up to 5.1 fb−1 at 7 TeV and 5.3 fb−1 at 8 TeV.

Article published in “Physics Letters B”, Received 31 July 2012.  Received in revised form 9 August 2012. Accepted 11 August 2012 – Available online 18 August 2012.

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Joint use of Weniger transformation and hyperasymptotics for accurate asymptotic evaluations of a class of saddle-point integrals. II. Higher order transformations

The use of hyperasymptotics (H) and the Weniger transformation (WY) has been proposed, in a joint fashion, for decoding the divergent asymptotic series generated by the steepest descent on a wide class of saddle-point integrals evaluated across Stokes sets (Borghi, 2008). In the present sequel, the full development of the hyperasymptotic- Weniger transformation (H-WY) up to the second order in H is derived. Numerical experiments, carried out on several classes of saddle-point integrals, including the swallowtail diffraction catastrophe, show the effectiveness of the second-level H-WT, in particular  when the integrals are evaluated beyond the asymptotics realm.

Article originally published in ‘Physical Review’, V. 80(2009), n. 1, Copyright (2009) by the American Physical Society. Reprinted with permission

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