Showing papers by "F. Bucci published in 2017"
TL;DR: NA62 as mentioned in this paper is a fixed-target experiment at the CERN SPS dedicated to measurements of rare kaon decays, such as the branching fraction of the K+ → π+ ν bar nu decay, which can bring significant insights into new physics processes when comparison is made with precise theoretical predictions.
Abstract: NA62 is a fixed-target experiment at the CERN SPS dedicated to measurements of rare kaon decays. Such measurements, like the branching fraction of the K+ → π+ ν bar nu decay, have the potential to bring significant insights into new physics processes when comparison is made with precise theoretical predictions. For this purpose, innovative techniques have been developed, in particular, in the domain of low-mass tracking devices. Detector construction spanned several years from 2009 to 2014. The collaboration started detector commissioning in 2014 and will collect data until the end of 2018. The beam line and detector components are described together with their early performance obtained from 2014 and 2015 data.
184 citations
University of Birmingham1, CERN2, Joint Institute for Nuclear Research3, George Mason University4, University of Mainz5, University of California, Merced6, Sapienza University of Rome7, DSM8, Universidad Autónoma de San Luis Potosí9, SLAC National Accelerator Laboratory10, Sofia University11, TRIUMF12
TL;DR: The NA62 experiment recorded a large sample of K+→μ+νμ decays in 2007, and a peak search has been performed in the reconstructed missing mass spectrum as mentioned in this paper, which extends the range of masses for which upper limits have been set on the value of |Uμ4|2 in previous production search experiments.
35 citations
University of Birmingham1, Comenius University in Bratislava2, CERN3, Joint Institute for Nuclear Research4, George Mason University5, Imperial College London6, University of California, Merced7, Sapienza University of Rome8, DSM9, Universidad Autónoma de San Luis Potosí10, SLAC National Accelerator Laboratory11, Sofia University12, TRIUMF13
TL;DR: In this paper, a measurement of the π0 electromagnetic transition form factor slope parameter from 1.11×106 fully reconstructed K±→π±πD0, πD0→e+e−γ events is reported.
34 citations
TL;DR: In this paper, the characterization of the mirrors before installation and the mirror support system are described, as well as the mirror installation procedure and the laser alignment are also illustrated, where the authors show how to align 20 spherical mirrors with 17 m focal length to suppress the muon contamination in the charged pion selection.
Abstract: A large RICH detector is used in NA62 to suppress the muon contamination in the charged pion selection by a factor 100 in the momentum range between 15 and 35 GeV/c. The detector consists of a 17 m long tank (vessel), filled with neon gas at atmospheric pressure. Cherenkov light is reflected by a mosaic of 20 spherical mirrors with 17 m focal length, placed at the downstream end, and collected by 1952 photomultipliers (PMTs) placed at the upstream end. In this paper the characterization of the mirrors before installation and the mirror support system are described. The mirror installation procedure and the laser alignment are also illustrated.
11 citations
TL;DR: The NA62 experiment at CERN is designed to measure the branching ratio of the K + → π + ν ν -decay with 10% precision as discussed by the authors.
1 citations
TL;DR: In this paper, a measurement of the electromagnetic transition form factor slope of the neutral pion in the time-like region from about one million fully reconstructed π 0 Dalitz decays is presented.
Abstract: The NA62 experiment at CERN collected a large sample of charged kaon decays with a highly efficient trigger for decays into electrons in 2007. A measurement of the electromagnetic transition form factor slope of the neutral pion in the time-like region from about one million fully reconstructed π 0 Dalitz decays is presented.The limits on dark photon production from a sample of about 1.7 × 107 π 0 Dalitz decays collected in 2003-2004 by the earlier kaon experiment at CERN NA48/2 are also reported.
1 citations
TL;DR: In this paper, a measurement of the electromagnetic transition form factor slope of the neutral pion in the time-like region from ∼1 million fully reconstructed π 0 Dalitz decay is presented.