Neutrino physics with the PTOLEMY project: active neutrino properties and the light sterile case
PTOLEMY collaboration, M. G. Betti, M. Biasotti, A. Boscá, F. Calle, G. Cavoto, C. Chang, A. G. Cocco, A. P. Colijn, J. Conrad, N. D'Ambrosio, N. De Groot, P. F… 展开作者
PTOLEMY collaboration, M. G. Betti, M. Biasotti, A. Boscá, F. Calle, G. Cavoto, C. Chang, A. G. Cocco, A. P. Colijn, J. Conrad, N. D'Ambrosio, N. De Groot, P. F. de Salas, M. Faverzani, A. Ferella, E. Ferri, P. Garcia-Abia, I. García-Cortés, G. Garcia Gomez-Tejedor, S. Gariazzo, F. Gatti, C. Gentile, A. Giachero, J. E. Gudmundsson, Y. Hochberg, Y. Kahn, A. Kievsky, M. Lisanti, C. Mancini-Terracciano, G. Mangano, L. E. Marcucci, C. Mariani, J. Martínez, M. Messina, A. Molinero-Vela, E. Monticone, A. Moroño, A. Nucciotti, F. Pandolfi, S. Parlati, S. Pastor, J. Pedrós, C. Pérez de los Heros, O. Pisanti, A. D. Polosa, A. Puiu, I. Rago, Y. Raitses, M. Rajteri, N. Rossi, I. Rucandio, R. Santorelli, K. Schaeffner, C. G. Tully, M. Viviani, F. Zhao, K. M. Zurek
The PTOLEMY project aims to develop a scalable design for a Cosmic Neutrino Background (CNB) detector, the first of its kind and the only one conceived that can look directly at the image of the Universe encoded in neutrino background produced in the first second after the Big Bang. The scope of the work for the next three years is to complete the conceptual design of this detector and to validate with direct measurements that the non-neutrino backgrounds are below the expected cosmological signal. In this paper we discuss in details the theoretical aspects of the experiment and its physics goals. In particular, we mainly address three issues. First we discuss the sensitivity of PTOLEMY to the standard neutrino mass scale. We then study the perspectives of the experiment to detect the CNB via neutrino capture on tritium as a function of the neutrino mass scale and the energy resolution of the apparatus. Finally, we consider an extra sterile neutrino with mass in the eV range, coupled to the active states via oscillations, which has been advocated in view of neutrino oscillation anomalies. This extra state would contribute to the tritium decay spectrum, and its properties, mass and mixing angle, could be studied by analyzing the features in the beta decay electron spectrum.
Ultra-high precision high voltage system for PTOLEMY
INFN Laboratori Nazionali del Gran Sasso (LNGS)（意大利国家核物理研究所大萨索国家实验室）；Gran Sasso Science Institute (GSSI)（大萨索科学研究所）；Nationaal instituut voor subatomaire fysica (NIKHEF)（荷兰亚原子物理国家研究所）；University of Amsterdam（阿姆斯特丹大学）；Columbia University（哥伦比亚大学）；Princeton University（普林斯顿大学）；Radboud University（拉博德大学）；Uppsala University（乌普萨拉大学）；University of Oxford（牛津大学）；Instituto de Fisica Corpuscular (IFIC - CSIC/UV)（粒子物理研究所（CSIC/瓦伦西亚大学联合））
Phasing out of Darkness: From Sterile Neutrino Dark Matter to Neutrino Masses via Time-Dependent Mixing
Max-Planck-Institut für Kernphysik（马克斯·普朗克核物理研究所）；Centro de Astrofísica e Gravitação - CENTRA, Departamento de Física, Instituto Superior Técnico - IST, Universidade de Lisboa - UL（里斯本大学高等技术学院物理系天体物理学与引力中心）；Departamento de Física Teórica and Instituto de Física de Partículas y del Cosmos (IPARCOS-UCM), Universidad Complutense de Madrid（马德里康普顿斯大学理论物理系及粒子与宇宙物理研究所）
