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 ν̄ 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.
Highlights
1.1 Physics motivationInvestigation of quark mixing and CP violation in K and B meson decays has been one of the most active areas of high-energy physics in past decades
This suppression makes the observation of flavour-changing neutral currents (FCNC) a sensitive test of the Standard Model (SM): any deviation from predictions would give a clear sign of physics beyond the SM
Bicron BCF-92, multi-cladded, 1 mm diameter WLS fibres were used for light readout; the fibres were mirrored at the end opposite to the silicon photomultipliers (SiPMs) by Al sputtering under vacuum, cut to the desired length, and glued to the connectors
Summary
Investigation of quark mixing and CP violation in K and B meson decays has been one of the most active areas of high-energy physics in past decades. The conservation of probability leads to the cancellation of flavour-changing neutral currents (FCNC) at tree level, known as the GIM mechanism [3] This suppression makes the observation of FCNC a sensitive test of the SM: any deviation from predictions would give a clear sign of physics beyond the SM. Within the SM, one can determine fundamental parameters such as quark masses, mixing parameters and phenomenological quantities (e.g. decay constants and form factors) allowing the interpretation of the observed properties of hadrons in terms of the fundamental quark constituents. In another approach, one can fix the SM parameters using theoretical and phenomenological determinations to make firm predictions and look for deviations in the data. The gap between theory and experiment is striking: the main goal of the NA62 experiment [7] is to match the 10% theory precision for the K+ → π+ννdecay rate
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
