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Title: Status of the KATRIN experiment and prospects to search for keV-mass sterile neutrinos in tritium β-decay

Abstract

In this contribution the current status and future perspectives of the Karlsruhe Tritium Neutrino (KATRIN) Experiment are presented. The prime goal of this single β-decay experiment is to probe the absolute neutrino mass scale with a sensitivity of 200 meV (90% CL). We discuss first results of the recent main spectrometer commissioning measurements, successfully verifying the spectrometer’s basic vacuum, transmission and background properties. We also discuss the prospects of making use of the KATRIN tritium source, to search for sterile neutrinos in the multi-keV mass range constituting a classical candidate for Warm Dark Matter. Due to the very high source luminosity, a statistical sensitivity down to active-sterile mixing angles of sin² θ < 1 · 10⁻⁷ (90% CL) could be reached.

Authors:
 [1]
  1. Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1208652
Grant/Contract Number:
AC02-05CH11231
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics Procedia
Additional Journal Information:
Journal Volume: 61; Journal Issue: C; Journal ID: ISSN 1875-3892
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 79 ASTRONOMY AND ASTROPHYSICS; neutrino mass; sterile neutrinos; warm dark matter; low energy physics; low background; tritium beta decay; MAC-E filter

Citation Formats

Mertens, Susanne. Status of the KATRIN experiment and prospects to search for keV-mass sterile neutrinos in tritium β-decay. United States: N. p., 2015. Web. doi:10.1016/j.phpro.2014.12.043.
Mertens, Susanne. Status of the KATRIN experiment and prospects to search for keV-mass sterile neutrinos in tritium β-decay. United States. doi:10.1016/j.phpro.2014.12.043.
Mertens, Susanne. Tue . "Status of the KATRIN experiment and prospects to search for keV-mass sterile neutrinos in tritium β-decay". United States. doi:10.1016/j.phpro.2014.12.043. https://www.osti.gov/servlets/purl/1208652.
@article{osti_1208652,
title = {Status of the KATRIN experiment and prospects to search for keV-mass sterile neutrinos in tritium β-decay},
author = {Mertens, Susanne},
abstractNote = {In this contribution the current status and future perspectives of the Karlsruhe Tritium Neutrino (KATRIN) Experiment are presented. The prime goal of this single β-decay experiment is to probe the absolute neutrino mass scale with a sensitivity of 200 meV (90% CL). We discuss first results of the recent main spectrometer commissioning measurements, successfully verifying the spectrometer’s basic vacuum, transmission and background properties. We also discuss the prospects of making use of the KATRIN tritium source, to search for sterile neutrinos in the multi-keV mass range constituting a classical candidate for Warm Dark Matter. Due to the very high source luminosity, a statistical sensitivity down to active-sterile mixing angles of sin² θ < 1 · 10⁻⁷ (90% CL) could be reached.},
doi = {10.1016/j.phpro.2014.12.043},
journal = {Physics Procedia},
number = C,
volume = 61,
place = {United States},
year = {Tue Mar 24 00:00:00 EDT 2015},
month = {Tue Mar 24 00:00:00 EDT 2015}
}

Journal Article:
Free Publicly Available Full Text
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Citation Metrics:
Cited by: 11works
Citation information provided by
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  • Cited by 12
  • We analyze the constraints on neutrino mass spectra with extra sterile neutrinos as implied by the LSND experiment. The various mass related observables in neutrinoless double beta decay, tritium beta decay and cosmology are discussed. Both neutrino oscillation results as well as recent cosmological neutrino mass bounds are taken into account. We find that some of the allowed mass patterns are severely restricted by the current constraints, in particular, by the cosmological constraints on the total sum of neutrino masses and by the nonmaximality of the solar neutrino mixing angle. Furthermore, we estimate the form of the four neutrino massmore » matrices and also comment on the situation in scenarios with two additional sterile neutrinos.« less
  • KATRIN is the next generation tritium neutrino mass experiment presently set up at Forschungszentrum Karlsruhe by the international KATRIN collaboration. The aim is to push the present limit on the neutrino mass from 2 eV [1] down to 0.2 eV with the hope to detect a finite mass with discovery potential of 0.35 eV. The experimental set up and the present status of KATRIN will be given.
  • The most sensitive way to determine the neutrino mass scale without further assumptions is to measure the shape of a tritium beta spectrum near its kinematic end-point. Tritium is the nucleus of choice because of its low endpoint energy, superallowed decay and simple atomic structure. Within an international collaboration the Karlsruhe Tritium Neutrino experiment (KATRIN) is currently being built up at KIT. KATRIN will allow a model-independent measurement of the neutrino mass scale with an expected sensitivity of 0.2 eV/c{sup 2} (90% CL). KATRIN will use a source of ultrapure molecular tritium. This contribution presents the status of the KATRINmore » experiment, thereby focusing on its Calibration and Monitoring System (CMS), which is the last component being subject to research/development. After a brief overview of the KATRIN experiment in Section II the CMS is introduced in Section III. In Section IV the Beta Induced X-Ray Spectroscopy (BIXS) as method of choice to monitor the tritium activity of the KATRIN source is described and first results are presented.« less
  • A sterile neutrino with mass in the eV range, mixing with ν-bar {sub e}, is allowed and possibly even preferred by cosmology and oscillation experiments. If such eV-mass neutrinos exist they provide a much better target for direct detection in beta decay experiments than the active neutrinos which are expected to have sub-eV masses. Their relatively high mass would allow for an easy separation from the primary decay signal in experiments such as KATRIN.