First observation of the decay B[0 over s] → ϕK *[superscript 0]
The first observation of the decay B[0 over s] → ϕK∗[superscript 0] is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb[superscript −1] of pp collisions at √s = 7 TeV, collected with the LHCb detector. A yield of 30 ± 6 B[0 over s] → (K[superscript...
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| Format: | Article |
| Language: | en_US |
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Springer-Verlag
2014
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| Online Access: | http://hdl.handle.net/1721.1/86027 https://orcid.org/0000-0001-8285-3346 |
| _version_ | 1826188880603250688 |
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| author | Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Williams, Michael |
| author_sort | Williams, Michael |
| collection | MIT |
| description | The first observation of the decay B[0 over s] → ϕK∗[superscript 0] is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb[superscript −1] of pp collisions at √s = 7 TeV, collected with the LHCb detector. A yield of 30 ± 6 B[0 over s] → (K[superscript +]K[superscript −])(K[superscript −]π[superscript +) decays is found in the mass windows 1012.5 < M (K [superscript +] K [superscript −]) < 1026.5 MeV/c [superscript 2] and 746 < M(K [superscript −] π [superscript +]) < 1046 MeV/c [superscript 2]. The signal yield is found to be dominated by B[0 over s] → ϕK∗[superscript 0] decays, and the corresponding branching fraction is measured to be B(B[0 over s] → ϕK∗[superscript 0]) = (1.10 ± 0.24 (stat) ± 0.14 (syst) ± 0.08 (f [subscript d] /f [subscript s] )) × 10[superscript −6], where the uncertainties are statistical, systematic and from the ratio of fragmentation fractions f [subscript d] /f [subscript s] which accounts for the different production rate of B [superscript 0] and B[0 over s] mesons. The significance of B[0 over s] → ϕK∗[superscript 0] signal is 6.1 standard deviations. The fraction of longitudinal polarization in B[0 over s] → ϕK∗[superscript 0] decays is found to be f [subscript 0] = 0.51 ± 0.15 (stat) ± 0.07 (syst). |
| first_indexed | 2024-09-23T08:06:08Z |
| format | Article |
| id | mit-1721.1/86027 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T08:06:08Z |
| publishDate | 2014 |
| publisher | Springer-Verlag |
| record_format | dspace |
| spelling | mit-1721.1/860272022-09-30T07:30:56Z First observation of the decay B[0 over s] → ϕK *[superscript 0] Williams, Michael Massachusetts Institute of Technology. Department of Physics Williams, Michael The first observation of the decay B[0 over s] → ϕK∗[superscript 0] is reported. The analysis is based on a data sample corresponding to an integrated luminosity of 1.0 fb[superscript −1] of pp collisions at √s = 7 TeV, collected with the LHCb detector. A yield of 30 ± 6 B[0 over s] → (K[superscript +]K[superscript −])(K[superscript −]π[superscript +) decays is found in the mass windows 1012.5 < M (K [superscript +] K [superscript −]) < 1026.5 MeV/c [superscript 2] and 746 < M(K [superscript −] π [superscript +]) < 1046 MeV/c [superscript 2]. The signal yield is found to be dominated by B[0 over s] → ϕK∗[superscript 0] decays, and the corresponding branching fraction is measured to be B(B[0 over s] → ϕK∗[superscript 0]) = (1.10 ± 0.24 (stat) ± 0.14 (syst) ± 0.08 (f [subscript d] /f [subscript s] )) × 10[superscript −6], where the uncertainties are statistical, systematic and from the ratio of fragmentation fractions f [subscript d] /f [subscript s] which accounts for the different production rate of B [superscript 0] and B[0 over s] mesons. The significance of B[0 over s] → ϕK∗[superscript 0] signal is 6.1 standard deviations. The fraction of longitudinal polarization in B[0 over s] → ϕK∗[superscript 0] decays is found to be f [subscript 0] = 0.51 ± 0.15 (stat) ± 0.07 (syst). National Science Foundation (U.S.) 2014-04-04T18:00:25Z 2014-04-04T18:00:25Z 2013-11 2013-10 Article http://purl.org/eprint/type/JournalArticle 1029-8479 http://hdl.handle.net/1721.1/86027 Aaij, R., C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. “First Observation of the Decay B[0 over s] → ϕK *[superscript 0].” J. High Energ. Phys. 2013, no. 11 (November 2013). © CERN, for the bene t of the LHCb collaboration https://orcid.org/0000-0001-8285-3346 en_US http://dx.doi.org/10.1007/jhep11(2013)092 Journal of High Energy Physics Publisher with Creative Commons License http://creativecommons.org/licenses/by/4.0/ application/pdf Springer-Verlag Springer-Verlag |
| spellingShingle | Williams, Michael First observation of the decay B[0 over s] → ϕK *[superscript 0] |
| title | First observation of the decay B[0 over s] → ϕK *[superscript 0] |
| title_full | First observation of the decay B[0 over s] → ϕK *[superscript 0] |
| title_fullStr | First observation of the decay B[0 over s] → ϕK *[superscript 0] |
| title_full_unstemmed | First observation of the decay B[0 over s] → ϕK *[superscript 0] |
| title_short | First observation of the decay B[0 over s] → ϕK *[superscript 0] |
| title_sort | first observation of the decay b 0 over s ϕk superscript 0 |
| url | http://hdl.handle.net/1721.1/86027 https://orcid.org/0000-0001-8285-3346 |
| work_keys_str_mv | AT williamsmichael firstobservationofthedecayb0oversphksuperscript0 |