Limits on the Existence of sub-MeV Sterile Neutrinos from the Decay of ^{7}Be in Superconducting Quantum Sensors.

Autor: Friedrich S; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Kim GB; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Bray C; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA., Cantor R; STAR Cryoelectronics LLC, Santa Fe, New Mexico 87508, USA., Dilling J; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada., Fretwell S; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA., Hall JA; STAR Cryoelectronics LLC, Santa Fe, New Mexico 87508, USA., Lennarz A; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada.; Department of Physics and Astronomy, McMaster University, Hamilton, Ontario L8S 4M1, Canada., Lordi V; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Machule P; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada., McKeen D; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada., Mougeot X; Université Paris-Saclay, CEA, List, Laboratoire National Henri Becquerel (LNE-LNHB), F-91120 Palaiseau, France., Ponce F; Lawrence Livermore National Laboratory, Livermore, California 94550, USA.; Department of Physics, Stanford University, Stanford, California 94305, USA., Ruiz C; TRIUMF, Vancouver, British Columbia V6T 2A3, Canada., Samanta A; Lawrence Livermore National Laboratory, Livermore, California 94550, USA., Warburton WK; XIA LLC, Hayward, California 94544, USA., Leach KG; Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA.
Jazyk: angličtina
Zdroj: Physical review letters [Phys Rev Lett] 2021 Jan 15; Vol. 126 (2), pp. 021803.
DOI: 10.1103/PhysRevLett.126.021803
Abstrakt: Sterile neutrinos are natural extensions to the standard model of particle physics and provide a possible portal to the dark sector. We report a new search for the existence of sub-MeV sterile neutrinos using the decay-momentum reconstruction technique in the decay of ^{7}Be. The experiment measures the total energy of the ^{7}Li daughter atom from the electron capture decay of ^{7}Be implanted into sensitive superconducting tunnel junction (STJ) quantum sensors. This first experiment presents data from a single STJ operated at a low count rate for a net total of 28 days, and provides exclusion limits on sterile neutrinos in the mass range from 100 to 850 keV that improve upon previous work by up to an order of magnitude.
Databáze: MEDLINE