136 research outputs found
Description d'une nouvelle espèce de Cynipide [Hymén.]
No full textCabrera y Diaz Anatael. Description d'une nouvelle espèce de Cynipide [Hymén.]. In: Bulletin de la Société entomologique de France, volume 2 (2),1897. p. 25
LiquidO: First Opaque Detector for Decay?
No full textInternational audienceThe novel LiquidO detection for neutrino and rare decay physics has been released for the first time to the international community in the NOW conference (Sept.~2018) in Italy. The presentation summarised the LiquidO potential only and the new detection principle. This document aims to briefly summarise the most important features of LiquidO in the context of its application. Further details are to be provided in forthcoming publications
Possible Precise Neutrino Unitarity?
No full textInternational audienceThe exploration of the Standard Model (SM) leptonic mixing has been led by the study of the neutrino (ν) oscillations phenomenon, whose discovery was acknowledged by the 2015 Nobel prize in physics. Half a century of experimental and theoretical effort has established and demonstrated consistency with the 3ν model and with the so far SM three family evidence. While no direct significant manifestation for physics beyond the Standard Model (BSM) has been found, the SM is known not to suffice to explain all today's observed phenomenology. In the forthcoming decade, most oscillation parameters are expected to yield sub-percent precision. Such a knowledge opens the possibility to experimentally test for BSM manifestation(s) via the direct and competitive exploration of the PMNS matrix unitarity for the first time. Any significant deviation might, in turn, evidence the existence of non-standard states (i.e. new neutrino) and/or interactions, thus allowing for direct discovery potential. Even if no deviations were found, the PMNS matrix structure, very different from its CKM counterpart, is of fundamental importance to our understanding of the leptonic flavour sector. In this document, we shall briefly review today's PMNS unitarity status in the context of existing and future particle physics programme within the next decade. We identify the possible need for a missing experiment(s). One such a case maybe a hypothetical Super Chooz project, employing the novel LiquidO technology, to address both directly sensitivity to the unitarity and unique impact to the exploration of the neutrino oscillation phenomena. Such a program is expected to additionally and coherently reinforce the physics of all currently planned experiments via indirect information aiding both the CP violation and mass ordering forthcoming measurements
The SuperChooz Experiment: Unveiling the Opportunity
No full textA new Europe-based flagship neutrino experiment potential opens by exploiting a unique opportunity effectively hidden in the Chooz nuclear reactor site (France). The SuperChooz project’s birth is tied to the dismantling of the EDF Chooz-A nuclear reactor complex. Built around the 60s and unknown to most scientists, the Chooz-A site offers an underground volume of up to 50,000m3 available for neutrino fundamental science using the EDF Chooz-B two most powerful N4-EPR nuclear reactors located at about 1km away. The combination embodies the third generation of possible fundamental science at Chooz — Europe’s most renowned site for reactor neutrino research — while this time detectors may reach a scale comparable to the world's largest neutrino detector, such as the SuperKamiokande in Japan. The main experimental challenge is the site’s shallow overburden (~100m) demanding the use of the novel LiquidO technology (web: https://liquido.ijclab.in2p3.fr), originally pioneered around 2012 by the CNRS (France) and now led by the homonymous international consortium. The new detection methodology heralds the unprecedented active background rejection needed, including detection capabilities beyond reactor neutrinos only. Indeed, SuperChooz’s physics programme is designed to yield some of the world's most precise measurements that can additionally probe a few of the most insightful building-block symmetries of the Standard Model thus enabling unique discovery potential. SuperChooz programme also offers synergy potential allowing to boost the sensitivities of other world neutrinos flagship experiments, such as DUNE (US), JUNO (China) and HyperKamiokande (Japan). The potential exploitation of the Chooz-A site for fundamental science is in active discussion between CNRS and EDF since 2018, upon the completion of the Double Chooz experiment, whose results grant vast data-based knowledge for the accurate design of SuperChooz. The neutrino reactor-based first physics studies were released at the EPS-HEP-2019 conference (Ghent, Belgium). As of September 2022, CNRS and EDF signed the cooperation agreement officially starting the so-called SuperChooz Pathfinder era to address the project technical feasibility assessment by 2028. Moreover, the approved AntiMatter-OTech project, funded by the EU-EIC (France, Germany, Spain) and UKRI (UK), will address the specific LiquidO’s performance demonstration within the same time scale while establishing a new experiment in fundamental physics called νCLOUD at Chooz, including the direct participation of EDF in neutrino-based innovation for the first time. This seminar embodies the first release of the SuperChooz to the international community and will be followed by several publications. REGISTRATION ONLY IF A VISITOR CARD IS NEEDED</p
Systematic Comparison of the MINOS Near and Far Detector Readout Systems
No full textThe MINOS experiment is a neutrino oscillation baseline experiment intending to use high resolution L/E neutrinos to measure the atmospheric neutrino oscillations parameters to unprecedented precision. Two detectors have been built to realize the measurements, a Near detector, located about 1km downstream from the beam target at the Fermi Laboratory, and a Far detector, located at 736km, at the Soudan Laboratory. The technique relies on the Near detector to measure the un-oscillated neutrino spectrum, while the Far detector measures the neutrino spectrum once oscillated. The comparison between the two measurements is expected to allow MINOS to measure {Delta}m{sup 2} beyond 10% precision level. The Near and Far detectors have been built similarly to minimize possible systematic effects. Both detectors have been endowed with different readout systems, as the beam event rates are very different. The MINOS calibration detector (CalDet), installed at CERN, was instrumented with both readout systems such that they can simultaneously measure and characterize the energy deposition (response and event topology) of incident known particle from test-beams. This thesis presents the investigations to quantify the impact of the performance of both readout systems on the MINOS results using the measurements obtained with CalDet. The relative comparison of the responses of both readout systems have been measured to be consistent with being identical within a systematic uncertainty of 0.6%. The event topologies have been found to be negligibly affected. In addition, the performance of the detector simulations have been thoroughly investigated and validated to be in agreement with data within similar level of uncertainties
High Precision Calorimetry with Liquid Scintillator Detectors
No full textFirst presentation of the "Dual Calorimetry" concept being designed for JUNO (already internally approved) benefiting from pre-conception in the context of the Double Chooz experiment. Presentation done as first release of development for JUNO at the "Frontiers of Liquid Scintillator Technology" (2016) at FNAL (Chicago, USA
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