First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays
A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B[0 over s]→ϕϕ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between B[0 over s]-B̅[0 over s] mixing and the b→ss̅ s gluonic penguin decay amplit...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2013
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| Online Access: | http://hdl.handle.net/1721.1/80752 https://orcid.org/0000-0001-8285-3346 |
| _version_ | 1811085842795462656 |
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| author | Williams, M. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Williams, M. |
| author_sort | Williams, M. |
| collection | MIT |
| description | A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B[0 over s]→ϕϕ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between B[0 over s]-B̅[0 over s] mixing and the b→ss̅ s gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1.0 fb[superscript -1] and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 B[0 over s]→ϕϕ signal decays are obtained. The CP-violating phase is measured to be in the interval [-2.46,-0.76] rad at a 68% confidence level. The p value of the standard model prediction is 16%. |
| first_indexed | 2024-09-23T13:16:30Z |
| format | Article |
| id | mit-1721.1/80752 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:16:30Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/807522022-10-01T14:08:57Z First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays Williams, M. Massachusetts Institute of Technology. Department of Physics Williams, M. A first flavor-tagged measurement of the time-dependent CP-violating asymmetry in B[0 over s]→ϕϕ decays is presented. In this decay channel, the CP-violating weak phase arises due to CP violation in the interference between B[0 over s]-B̅[0 over s] mixing and the b→ss̅ s gluonic penguin decay amplitude. Using a sample of pp collision data corresponding to an integrated luminosity of 1.0 fb[superscript -1] and collected at a center-of-mass energy of 7 TeV with the LHCb detector, 880 B[0 over s]→ϕϕ signal decays are obtained. The CP-violating phase is measured to be in the interval [-2.46,-0.76] rad at a 68% confidence level. The p value of the standard model prediction is 16%. National Science Foundation (U.S.) 2013-09-16T16:20:00Z 2013-09-16T16:20:00Z 2013-06 2013-03 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/80752 Aaij, R., C. Abellan Beteta, B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, et al. “First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays.” Physical Review Letters 110, no. 24 (June 2013). © 2013 CERN https://orcid.org/0000-0001-8285-3346 en_US http://dx.doi.org/10.1103/PhysRevLett.110.241802 Physical Review Letters Creative Commons Attribution 3.0 http://creativecommons.org/licenses/by/3.0/ application/pdf American Physical Society APS |
| spellingShingle | Williams, M. First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays |
| title | First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays |
| title_full | First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays |
| title_fullStr | First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays |
| title_full_unstemmed | First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays |
| title_short | First Measurement of the CP-Violating Phase in B[0 over s]→ϕϕ Decays |
| title_sort | first measurement of the cp violating phase in b 0 over s ϕϕ decays |
| url | http://hdl.handle.net/1721.1/80752 https://orcid.org/0000-0001-8285-3346 |
| work_keys_str_mv | AT williamsm firstmeasurementofthecpviolatingphaseinb0oversphphdecays |