| Improved limits on nu(e) emission from mu+ decay. | |
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MedLine Citation:
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PMID: 12786000 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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We investigated mu(+) decays at rest produced at the ISIS beam stop target. Lepton flavor (LF) conservation has been tested by searching for nu(e) via the detection reaction p(nu(e),e(+))n. No nu(e) signal from LF violating mu(+) decays was identified. We extract upper limits of the branching ratio (BR) for the LF violating decay mu(+)-->e(+)+nu(e)+nu(-) compared to the standard model (SM) mu(+)-->e(+)+nu(e)+nu(mu) decay: BR<0.9(1.7) x 10(-3) (90% C.L.) depending on the spectral distribution of nu(e) characterized by the Michel parameter rho=0.75(0.0). These results improve earlier limits by one order of magnitude and restrict extensions of the SM in which nu(e) emission from mu(+) decay is allowed with considerable strength. The decay mu(+)-->e(+)+nu(e)+nu(mu) often proposed as a potential source for the nu(e) signal observed in the LSND experiment can be excluded. |
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Authors:
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B Armbruster; G Drexlin; K Eitel; T Jannakos; J Kleinfeller; R Maschuw; C Oehler; P Plischke; J Reichenbacher; M Steidl; B Zeitnitz; H Gemmeke; M Kleifges; C Eichner; C Ruf; B A Bodmann; E Finckh; J Hössl; P Jünger; W Kretschmer; J Wolf; N E Booth; I M Blair; J A Edgington |
Publication Detail:
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Type: Journal Article Date: 2003-05-09 |
Journal Detail:
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Title: Physical review letters Volume: 90 ISSN: 0031-9007 ISO Abbreviation: Phys. Rev. Lett. Publication Date: 2003 May |
Date Detail:
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Created Date: 2003-06-05 Completed Date: 2003-07-17 Revised Date: 2003-11-04 |
Medline Journal Info:
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Nlm Unique ID: 0401141 Medline TA: Phys Rev Lett Country: United States |
Other Details:
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Languages: eng Pagination: 181804 Citation Subset: - |
Affiliation:
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Institut für Kernphysik, Forschungszentrum Karlsruhe, 76021 Karlsruhe, Germany. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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