LIFETIME OF CHARGED AND NEUTRAL B-HADRONS USING EVENT TOPOLOGY
The lifetimes of charged and neutral B hadrons have been measured using data collected by the DELPHI experiment at LEP between 1991 and 1993. B hadrons are tagged as jets with a secondary vertex and the charge of the B candidate is taken to be the sum of the charges of the particles in the secondary...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| פורמט: | Journal article |
| שפה: | English |
| יצא לאור: |
1995
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| _version_ | 1826300762972487680 |
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| author | Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, G Allport, P Almehed, S Alvsvaag, S Amaldi, U Amato, S Andreazza, A Andrieux, M Antilogus, P Anykeyev, V Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Bardin, D |
| author_facet | Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, G Allport, P Almehed, S Alvsvaag, S Amaldi, U Amato, S Andreazza, A Andrieux, M Antilogus, P Anykeyev, V Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Bardin, D |
| author_sort | Adam, W |
| collection | OXFORD |
| description | The lifetimes of charged and neutral B hadrons have been measured using data collected by the DELPHI experiment at LEP between 1991 and 1993. B hadrons are tagged as jets with a secondary vertex and the charge of the B candidate is taken to be the sum of the charges of the particles in the secondary vertex. Approximately 1,434,000 multihadronic Z0 decays yielded 1817 B hadron candidates. The B purity was estimated to be around 99.1±0.3%, and 83% (70%) of the events measured as neutral (charged) came from neutral (charged) B's. The mean lifetimes of charged and neutral B hadrons were found to be 1.72±0.08 (stat.) ±0.06 (syst.) ps and 1.58±0.11 (stat.)±0.09 (syst.) ps respectively. The ratio of their lifertimes, τcharged/τneutral, was 1.09-0.10+0.11 (stat.)±0.08 (syst.). By making assumptions about the Bs0 and Λb0 states, the B+ and B0 meson lifetimes were determined to be τB+ = 1.72 ± 0.08 (stat.) ±0.06 (syst.) ps and τB+ = 1.63 ± 0.14 (stat.)±0.13 (syst.) ps and the ratio of their lifetimes was: τB+/τB0 = 1.06-0.11+0.13 ±0.10. The mean B lifetime was also deduced to be < τ > = 1.64 ±0.06 (stat.)±0.04 (syst.) ps. © 1995 Springer-Verlag. |
| first_indexed | 2024-03-07T05:22:06Z |
| format | Journal article |
| id | oxford-uuid:df46ca0d-0f8d-4c5c-9475-74fb4e395e1c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T05:22:06Z |
| publishDate | 1995 |
| record_format | dspace |
| spelling | oxford-uuid:df46ca0d-0f8d-4c5c-9475-74fb4e395e1c2022-03-27T09:38:21ZLIFETIME OF CHARGED AND NEUTRAL B-HADRONS USING EVENT TOPOLOGYJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:df46ca0d-0f8d-4c5c-9475-74fb4e395e1cEnglishSymplectic Elements at Oxford1995Adam, WAdye, TAgasi, EAjinenko, IAleksan, RAlekseev, GAllport, PAlmehed, SAlvsvaag, SAmaldi, UAmato, SAndreazza, AAndrieux, MAntilogus, PAnykeyev, VApel, WArnoud, YAsman, BAugustin, JAugustinus, ABaillon, PBambade, PBarao, FBarate, RBardin, DThe lifetimes of charged and neutral B hadrons have been measured using data collected by the DELPHI experiment at LEP between 1991 and 1993. B hadrons are tagged as jets with a secondary vertex and the charge of the B candidate is taken to be the sum of the charges of the particles in the secondary vertex. Approximately 1,434,000 multihadronic Z0 decays yielded 1817 B hadron candidates. The B purity was estimated to be around 99.1±0.3%, and 83% (70%) of the events measured as neutral (charged) came from neutral (charged) B's. The mean lifetimes of charged and neutral B hadrons were found to be 1.72±0.08 (stat.) ±0.06 (syst.) ps and 1.58±0.11 (stat.)±0.09 (syst.) ps respectively. The ratio of their lifertimes, τcharged/τneutral, was 1.09-0.10+0.11 (stat.)±0.08 (syst.). By making assumptions about the Bs0 and Λb0 states, the B+ and B0 meson lifetimes were determined to be τB+ = 1.72 ± 0.08 (stat.) ±0.06 (syst.) ps and τB+ = 1.63 ± 0.14 (stat.)±0.13 (syst.) ps and the ratio of their lifetimes was: τB+/τB0 = 1.06-0.11+0.13 ±0.10. The mean B lifetime was also deduced to be < τ > = 1.64 ±0.06 (stat.)±0.04 (syst.) ps. © 1995 Springer-Verlag. |
| spellingShingle | Adam, W Adye, T Agasi, E Ajinenko, I Aleksan, R Alekseev, G Allport, P Almehed, S Alvsvaag, S Amaldi, U Amato, S Andreazza, A Andrieux, M Antilogus, P Anykeyev, V Apel, W Arnoud, Y Asman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Bardin, D LIFETIME OF CHARGED AND NEUTRAL B-HADRONS USING EVENT TOPOLOGY |
| title | LIFETIME OF CHARGED AND NEUTRAL B-HADRONS USING EVENT TOPOLOGY |
| title_full | LIFETIME OF CHARGED AND NEUTRAL B-HADRONS USING EVENT TOPOLOGY |
| title_fullStr | LIFETIME OF CHARGED AND NEUTRAL B-HADRONS USING EVENT TOPOLOGY |
| title_full_unstemmed | LIFETIME OF CHARGED AND NEUTRAL B-HADRONS USING EVENT TOPOLOGY |
| title_short | LIFETIME OF CHARGED AND NEUTRAL B-HADRONS USING EVENT TOPOLOGY |
| title_sort | lifetime of charged and neutral b hadrons using event topology |
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