Experimental tests of lepton universality in tau decay
The branching fractions for τ→eνντ, μνντ, and hντ are measured using data collected with the CLEO detector at the CESR e+e- collider: Be=0.1776±0.0006±0.0017, Bμ=0.1737±0.0008±0.0018, and Bh=0.1152±0.0005±0.0012, where the first error is statistical, the second systematic, and h refers to either a c...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
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1997
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| _version_ | 1826295384163483648 |
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| author | Anastassov, A Blinov, S Duboscq, J Fisher, K Fujino, D Fulton, R Gan, K Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, M Sung, M Undrus, A Wanke, R Wolf, A Zoeller, M Nemati, B Richichi, S Ross, W Skubic, P Wood, M Bishai, M Fast, J |
| author_facet | Anastassov, A Blinov, S Duboscq, J Fisher, K Fujino, D Fulton, R Gan, K Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, M Sung, M Undrus, A Wanke, R Wolf, A Zoeller, M Nemati, B Richichi, S Ross, W Skubic, P Wood, M Bishai, M Fast, J |
| author_sort | Anastassov, A |
| collection | OXFORD |
| description | The branching fractions for τ→eνντ, μνντ, and hντ are measured using data collected with the CLEO detector at the CESR e+e- collider: Be=0.1776±0.0006±0.0017, Bμ=0.1737±0.0008±0.0018, and Bh=0.1152±0.0005±0.0012, where the first error is statistical, the second systematic, and h refers to either a charged π or K. Also measured is the τ mass, mτ=(1778.2±1.4) MeV. Lepton universality is affirmed by the relative branching fractions (Bμ/Be=0.9777±0.0063±0.0087, Bh/Be=0.6484±0.0041±0.0060) and the charged-current gauge coupling-constant ratios (gμ/ge=1.0026±0.0055, gτ/gμ=0.9990±0.0098). The τ mass result may be recast as a τ neutrino mass limit, mντ<60 MeV at 95% C.L. |
| first_indexed | 2024-03-07T04:00:10Z |
| format | Journal article |
| id | oxford-uuid:c4490ba0-090c-423a-a83b-a004cc04efb3 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T04:00:10Z |
| publishDate | 1997 |
| record_format | dspace |
| spelling | oxford-uuid:c4490ba0-090c-423a-a83b-a004cc04efb32022-03-27T06:22:37ZExperimental tests of lepton universality in tau decayJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:c4490ba0-090c-423a-a83b-a004cc04efb3Symplectic Elements at Oxford1997Anastassov, ABlinov, SDuboscq, JFisher, KFujino, DFulton, RGan, KHart, THonscheid, KKagan, HKass, RLee, JSpencer, MSung, MUndrus, AWanke, RWolf, AZoeller, MNemati, BRichichi, SRoss, WSkubic, PWood, MBishai, MFast, JThe branching fractions for τ→eνντ, μνντ, and hντ are measured using data collected with the CLEO detector at the CESR e+e- collider: Be=0.1776±0.0006±0.0017, Bμ=0.1737±0.0008±0.0018, and Bh=0.1152±0.0005±0.0012, where the first error is statistical, the second systematic, and h refers to either a charged π or K. Also measured is the τ mass, mτ=(1778.2±1.4) MeV. Lepton universality is affirmed by the relative branching fractions (Bμ/Be=0.9777±0.0063±0.0087, Bh/Be=0.6484±0.0041±0.0060) and the charged-current gauge coupling-constant ratios (gμ/ge=1.0026±0.0055, gτ/gμ=0.9990±0.0098). The τ mass result may be recast as a τ neutrino mass limit, mντ<60 MeV at 95% C.L. |
| spellingShingle | Anastassov, A Blinov, S Duboscq, J Fisher, K Fujino, D Fulton, R Gan, K Hart, T Honscheid, K Kagan, H Kass, R Lee, J Spencer, M Sung, M Undrus, A Wanke, R Wolf, A Zoeller, M Nemati, B Richichi, S Ross, W Skubic, P Wood, M Bishai, M Fast, J Experimental tests of lepton universality in tau decay |
| title | Experimental tests of lepton universality in tau decay |
| title_full | Experimental tests of lepton universality in tau decay |
| title_fullStr | Experimental tests of lepton universality in tau decay |
| title_full_unstemmed | Experimental tests of lepton universality in tau decay |
| title_short | Experimental tests of lepton universality in tau decay |
| title_sort | experimental tests of lepton universality in tau decay |
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