Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction
We present searches for the leptonic decays B+→ℓ+ν and the lepton flavor violating decays B0→ℓ±τ, where ℓ=e, μ, with data collected by the BABAR experiment at SLAC. This search demonstrates a novel technique in which we fully reconstruct the accompanying B̄ in Υ(4S)→BB̄ events, and look for a monoen...
| Autori principali: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Natura: | Journal article |
| Pubblicazione: |
2008
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| _version_ | 1826305528863653888 |
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| author | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prudent, X Tisserand, V Zghiche, A Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Battaglia, M Brown, D Button-Shafer, J Cahn, R Jacobsen, R Kadyk, J Kerth, LT Kolomensky, Y |
| author_facet | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prudent, X Tisserand, V Zghiche, A Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Battaglia, M Brown, D Button-Shafer, J Cahn, R Jacobsen, R Kadyk, J Kerth, LT Kolomensky, Y |
| author_sort | Aubert, B |
| collection | OXFORD |
| description | We present searches for the leptonic decays B+→ℓ+ν and the lepton flavor violating decays B0→ℓ±τ, where ℓ=e, μ, with data collected by the BABAR experiment at SLAC. This search demonstrates a novel technique in which we fully reconstruct the accompanying B̄ in Υ(4S)→BB̄ events, and look for a monoenergetic lepton from the signal B decay. The signal yield is extracted from a fit to the signal lepton candidate momentum distribution in the signal B rest frame. Using a data sample of approximately 378×106 BB̄ pairs (342fb-1), we find no evidence of signal in any of the decay modes. Branching fraction upper limits of B(B+→e+ν)<5.2×10-6, B(B+→μ+ν)<5.6×10-6, B(B0→e+τ-)<2.8×10-5 and B(B0→μ+τ-)<2. 2×10-5, are obtained at 90% confidence level. © 2008 The American Physical Society. |
| first_indexed | 2024-03-07T06:34:13Z |
| format | Journal article |
| id | oxford-uuid:f70a7c9b-09c4-4780-a8f5-94cd33e2d9a6 |
| institution | University of Oxford |
| last_indexed | 2024-03-07T06:34:13Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:f70a7c9b-09c4-4780-a8f5-94cd33e2d9a62022-03-27T12:39:49ZSearches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstructionJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:f70a7c9b-09c4-4780-a8f5-94cd33e2d9a6Symplectic Elements at Oxford2008Aubert, BBona, MKaryotakis, YLees, JPoireau, VPrudent, XTisserand, VZghiche, ATico, JGrauges, ELopez, LPalano, APappagallo, MEigen, GStugu, BSun, LAbrams, GBattaglia, MBrown, DButton-Shafer, JCahn, RJacobsen, RKadyk, JKerth, LTKolomensky, YWe present searches for the leptonic decays B+→ℓ+ν and the lepton flavor violating decays B0→ℓ±τ, where ℓ=e, μ, with data collected by the BABAR experiment at SLAC. This search demonstrates a novel technique in which we fully reconstruct the accompanying B̄ in Υ(4S)→BB̄ events, and look for a monoenergetic lepton from the signal B decay. The signal yield is extracted from a fit to the signal lepton candidate momentum distribution in the signal B rest frame. Using a data sample of approximately 378×106 BB̄ pairs (342fb-1), we find no evidence of signal in any of the decay modes. Branching fraction upper limits of B(B+→e+ν)<5.2×10-6, B(B+→μ+ν)<5.6×10-6, B(B0→e+τ-)<2.8×10-5 and B(B0→μ+τ-)<2. 2×10-5, are obtained at 90% confidence level. © 2008 The American Physical Society. |
| spellingShingle | Aubert, B Bona, M Karyotakis, Y Lees, J Poireau, V Prudent, X Tisserand, V Zghiche, A Tico, J Grauges, E Lopez, L Palano, A Pappagallo, M Eigen, G Stugu, B Sun, L Abrams, G Battaglia, M Brown, D Button-Shafer, J Cahn, R Jacobsen, R Kadyk, J Kerth, LT Kolomensky, Y Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction |
| title | Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction |
| title_full | Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction |
| title_fullStr | Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction |
| title_full_unstemmed | Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction |
| title_short | Searches for the decays B-0 -> l(+/-)tau(-/+) and B+-> l(+)nu (l = e, mu) using hadronic tag reconstruction |
| title_sort | searches for the decays b 0 gt l tau and b gt l nu l e mu using hadronic tag reconstruction |
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