Evidence for B-→τ-ν̄τ with a semileptonic tagging method
We present a measurement of the decay B-→τ -ν̄τ using a data sample containing 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. A sample of B+B- pairs are tagged by reconstructing one B+ meson decaying semileptonically. We detect...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
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2010
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| _version_ | 1826265503815958528 |
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| author | Hara, K Iijima, T Aihara, H Aulchenko, V Aushev, T Aziz, T Bakich, A Barberio, E Belous, K Bischofberger, M Bondar, A Bozek, A Bračko, M Browder, T Chang, P Chao, Y Chen, A Cheon, BG Chiang, C Cho, I Choi, Y Dalseno, J Danilov, M Doležal, Z Dungel, W |
| author_facet | Hara, K Iijima, T Aihara, H Aulchenko, V Aushev, T Aziz, T Bakich, A Barberio, E Belous, K Bischofberger, M Bondar, A Bozek, A Bračko, M Browder, T Chang, P Chao, Y Chen, A Cheon, BG Chiang, C Cho, I Choi, Y Dalseno, J Danilov, M Doležal, Z Dungel, W |
| author_sort | Hara, K |
| collection | OXFORD |
| description | We present a measurement of the decay B-→τ -ν̄τ using a data sample containing 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. A sample of B+B- pairs are tagged by reconstructing one B+ meson decaying semileptonically. We detect the B-→τ -ν̄τ candidate in the recoil. We obtain a signal with a significance of 3.6 standard deviations including systematic uncertainties, and measure the branching fraction to be B(B-→τ -ν̄τ)=[1.54-0.37+0.38(stat)-0.31+0.29(syst)] ×10-4. This result confirms the evidence for B -→τ-ν̄τ obtained in a previous Belle measurement that used a hadronic B tagging method. © 2010 The American Physical Society. |
| first_indexed | 2024-03-06T20:24:43Z |
| format | Journal article |
| id | oxford-uuid:2f03ce0e-cf0f-4d58-adc0-93bf20d0b74f |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T20:24:43Z |
| publishDate | 2010 |
| record_format | dspace |
| spelling | oxford-uuid:2f03ce0e-cf0f-4d58-adc0-93bf20d0b74f2022-03-26T12:52:32ZEvidence for B-→τ-ν̄τ with a semileptonic tagging methodJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:2f03ce0e-cf0f-4d58-adc0-93bf20d0b74fEnglishSymplectic Elements at Oxford2010Hara, KIijima, TAihara, HAulchenko, VAushev, TAziz, TBakich, ABarberio, EBelous, KBischofberger, MBondar, ABozek, ABračko, MBrowder, TChang, PChao, YChen, ACheon, BGChiang, CCho, IChoi, YDalseno, JDanilov, MDoležal, ZDungel, WWe present a measurement of the decay B-→τ -ν̄τ using a data sample containing 657×106 BB̄ pairs collected at the Υ(4S) resonance with the Belle detector at the KEKB asymmetric-energy e+e- collider. A sample of B+B- pairs are tagged by reconstructing one B+ meson decaying semileptonically. We detect the B-→τ -ν̄τ candidate in the recoil. We obtain a signal with a significance of 3.6 standard deviations including systematic uncertainties, and measure the branching fraction to be B(B-→τ -ν̄τ)=[1.54-0.37+0.38(stat)-0.31+0.29(syst)] ×10-4. This result confirms the evidence for B -→τ-ν̄τ obtained in a previous Belle measurement that used a hadronic B tagging method. © 2010 The American Physical Society. |
| spellingShingle | Hara, K Iijima, T Aihara, H Aulchenko, V Aushev, T Aziz, T Bakich, A Barberio, E Belous, K Bischofberger, M Bondar, A Bozek, A Bračko, M Browder, T Chang, P Chao, Y Chen, A Cheon, BG Chiang, C Cho, I Choi, Y Dalseno, J Danilov, M Doležal, Z Dungel, W Evidence for B-→τ-ν̄τ with a semileptonic tagging method |
| title | Evidence for B-→τ-ν̄τ with a semileptonic tagging method |
| title_full | Evidence for B-→τ-ν̄τ with a semileptonic tagging method |
| title_fullStr | Evidence for B-→τ-ν̄τ with a semileptonic tagging method |
| title_full_unstemmed | Evidence for B-→τ-ν̄τ with a semileptonic tagging method |
| title_short | Evidence for B-→τ-ν̄τ with a semileptonic tagging method |
| title_sort | evidence for b τ ν̄τ with a semileptonic tagging method |
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