Possible Existence of a Neutrino with Mass and Partial Conservation of Muon Charge

Nakagawa, Masami; Okonogi, Hisaichiro; Sakata, Shoichi; Toyoda, Akira

doi:10.1143/ptp.30.727

Cited by 52 publications

(11 citation statements)

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“…This means that experiments designed for the direct investigation of the electron (anti-)neutrino mass have the possibility to scrutinize the parameter space of active-sterile neutrino mixing indicated by short-baseline experiments. The evidence for the existence of such a sterile neutrino would be a kink in the spectrum positioned at Q − m 4 [82][83][84], where Q is the energy available to the decay, which is given by the difference between the masses of the parent and daughter atoms. The amplitude of this kink is related to the mixing |U e4 | that ν 4 has with ν e .…”

Section: Jhep06(2016)061mentioning

confidence: 99%

Light sterile neutrino sensitivity of 163Ho experiments

Gastaldo

Giunti

Zavanin

2016

J. High Energ. Phys.

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Abstract:We explore the sensitivity of 163 Ho electron capture experiments to neutrino masses in the standard framework of three-neutrino mixing and in the framework of 3+1 neutrino mixing with a sterile neutrino which mixes with the three standard active neutrinos, as indicated by the anomalies found in short-baseline neutrino oscillations experiments. We calculate the sensitivity to neutrino masses and mixing for different values of the energy resolution of the detectors, of the unresolved pileup fraction and of the total statistics of events, considering the expected values of these parameters in the two planned stages of the ECHo project (ECHo-1k and ECHo-1M). We show that an extension of the ECHo-1M experiment with the possibility to collect 10 16 events will be competitive with the KATRIN experiment. This statistics will allow to explore part of the 3+1 mixing parameter space indicated by the global analysis of short-baseline neutrino oscillation experiments. In order to cover all the allowed region, a statistics of about 10 17 events will be needed.

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Section: Jhep06(2016)061mentioning

confidence: 99%

Light sterile neutrino sensitivity of 163Ho experiments

Gastaldo

Giunti

Zavanin

2016

J. High Energ. Phys.

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“…The spectrum would have a "kink" at the endpoint energy E max (m h ) [353,[362][363][364]. The position of the kink determines the mass of the heavy state, m h , and the change in the slope of the spectrum determines the mixing |U eh | 2 .…”

Section: Laboratory Experimentsmentioning

confidence: 99%

Theory of neutrinos: a white paper

et al. 2007

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During 2004, four divisions of the American Physical Society commissioned a study of neutrino physics to take stock of where the field is at the moment and where it is going in the near and far future. Several working groups looked at various aspects of this vast field. The summary was published as a main report entitled "The Neutrino Matrix" accompanied by short 50 page versions of the report of each working group. Theoretical research in this field has been quite extensive and touches many areas and the short 50 page report [1] provided only a brief summary and overview of few of the important points. The theory discussion group felt that it may be of value to the community to publish the entire study as a white paper and the result is the current article. After a brief overview of the present knowledge of neutrino masses and mixing and some popular ways to probe the new physics implied by recent data, the white paper summarizes what can be learned about physics beyond the Standard Model from the various proposed neutrino experiments. It also comments on the impact of the experiments on our understanding of the origin of the matter-antimatter asymmetry of the Universe and the basic nature of neutrino interactions as well as the existence of possible additional neutrinos. Extensive references to original literature are provided.2

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“…A sensitive way to observe small neutrino masses is to study neutrino flavor oscillations (Maki, Nakagawa, and Sakata, 1962;Nakagawa et al, 1963;Pontecorvo, 1967;Gribov and Pontecorvo, 1969; see also Pontecorvo, 1957). For simplicity, we consider a two-neutrino oscillation hypothesis.…”

Section: Introduction and Historymentioning

confidence: 99%

Observation of atmospheric neutrinos

2001

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Atmospheric neutrinos are produced as decay products in hadronic showers resulting from collisions of cosmic rays with nuclei in the atmosphere. Electron neutrinos and muon neutrinos are produced mainly by the decay chain of charged pions to muons to electrons. Atmospheric neutrinos have been observed by large underground detectors. Depending on their energy, these neutrinos are observed as fully contained events, partially contained events, or upward going muon events. The energy range covered by these events is from a few hundred MeV to above 100 GeV. It has been known for about ten years that some data suggested the existence of neutrino oscillations. With the recent increase in event data, especially from Super-Kamiokande, it is concluded that the atmospheric neutrino data give evidence for neutrino oscillations. Two-flavor → oscillations, with sin 2 2Ͼ0.88 and ⌬m 2 in the region of 2ϫ10 Ϫ3 to 5ϫ10 Ϫ3 eV 2 , explain all these data. CONTENTS

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Possible Existence of a Neutrino with Mass and Partial Conservation of Muon Charge

Cited by 52 publications

References 0 publications

Light sterile neutrino sensitivity of 163Ho experiments

Light sterile neutrino sensitivity of 163Ho experiments

Theory of neutrinos: a white paper

Observation of atmospheric neutrinos

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