B* production in Z decays
The decay B*→Bγ has been observed with the DELPHI detector at LEP, where the B* meson is produced in Z boson decays. The combination of inclusively reconstructed B mesons with well-measured converted photons yields a measurement of the flavour-averaged B*-B mass difference of 45.5±0.3 (stat.) ±0.8 (...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Journal article |
| Language: | English |
| Published: |
1995
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| _version_ | 1826287021670268928 |
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| author | Abreu, P 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 Apel, W Arnoud, Y Åsman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Bardin, D |
| author_facet | Abreu, P 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 Apel, W Arnoud, Y Åsman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Bardin, D |
| author_sort | Abreu, P |
| collection | OXFORD |
| description | The decay B*→Bγ has been observed with the DELPHI detector at LEP, where the B* meson is produced in Z boson decays. The combination of inclusively reconstructed B mesons with well-measured converted photons yields a measurement of the flavour-averaged B*-B mass difference of 45.5±0.3 (stat.) ±0.8 (syst.) MeV/c2. 95% confidence level upper limits at 6 MeV/c2 are placed on both the isospin (i.e. B+-B0) and the Bs-Bud splitting of the mass difference. The production ratio of B* to B mesons in Z decays is measured to be 0.72±0.03 (stat.) ±0.06 (syst.). Limits on the production cross-section of other hypothetical excited B hadron states decaying radiatively are established. The differential B* cross section has been measured to be in good agreement with the average b fragmentation, yielding an average fractional B* energy of 〈xE〉=0.695±0.009 (stat.) ±0.013 (syst.). From the decay angular distribution the relative contribution of longitudinal B* polarisation states is measured to be σL/(σL + σT) = 0.32 ± 0.04 (stat.) ±0.03 (syst.). © 1995 Springer-Verlag. |
| first_indexed | 2024-03-07T01:52:23Z |
| format | Journal article |
| id | oxford-uuid:9a8ed97a-ea01-4d92-94fb-ddef2ab27b85 |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-07T01:52:23Z |
| publishDate | 1995 |
| record_format | dspace |
| spelling | oxford-uuid:9a8ed97a-ea01-4d92-94fb-ddef2ab27b852022-03-27T00:22:11ZB* production in Z decaysJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:9a8ed97a-ea01-4d92-94fb-ddef2ab27b85EnglishSymplectic Elements at Oxford1995Abreu, PAdam, WAdye, TAgasi, EAjinenko, IAleksan, RAlekseev, GAllport, PAlmehed, SAlvsvaag, SAmaldi, UAmato, SAndreazza, AAndrieux, MAntilogus, PApel, WArnoud, YÅsman, BAugustin, JAugustinus, ABaillon, PBambade, PBarao, FBarate, RBardin, DThe decay B*→Bγ has been observed with the DELPHI detector at LEP, where the B* meson is produced in Z boson decays. The combination of inclusively reconstructed B mesons with well-measured converted photons yields a measurement of the flavour-averaged B*-B mass difference of 45.5±0.3 (stat.) ±0.8 (syst.) MeV/c2. 95% confidence level upper limits at 6 MeV/c2 are placed on both the isospin (i.e. B+-B0) and the Bs-Bud splitting of the mass difference. The production ratio of B* to B mesons in Z decays is measured to be 0.72±0.03 (stat.) ±0.06 (syst.). Limits on the production cross-section of other hypothetical excited B hadron states decaying radiatively are established. The differential B* cross section has been measured to be in good agreement with the average b fragmentation, yielding an average fractional B* energy of 〈xE〉=0.695±0.009 (stat.) ±0.013 (syst.). From the decay angular distribution the relative contribution of longitudinal B* polarisation states is measured to be σL/(σL + σT) = 0.32 ± 0.04 (stat.) ±0.03 (syst.). © 1995 Springer-Verlag. |
| spellingShingle | Abreu, P 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 Apel, W Arnoud, Y Åsman, B Augustin, J Augustinus, A Baillon, P Bambade, P Barao, F Barate, R Bardin, D B* production in Z decays |
| title | B* production in Z decays |
| title_full | B* production in Z decays |
| title_fullStr | B* production in Z decays |
| title_full_unstemmed | B* production in Z decays |
| title_short | B* production in Z decays |
| title_sort | b production in z decays |
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