First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays
A flavour-tagged time-dependent angular analysis of B0s→J/ψϕ decays is presented where the J/ψ meson is reconstructed through its decay to an e+e− pair. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and 8\,Te V, corresponding to an...
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| Materialtyp: | Artikel |
| Språk: | English |
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Springer Berlin Heidelberg
2021
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| Länkar: | https://hdl.handle.net/1721.1/138229 |
| _version_ | 1826217021433446400 |
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| author | Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A. Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alkhazov, G. Alvarez Cartelle, P. Amato, S. Amhis, Y. An, L. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A. Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alkhazov, G. Alvarez Cartelle, P. Amato, S. Amhis, Y. An, L. |
| author_sort | Aaij, R. |
| collection | MIT |
| description | A flavour-tagged time-dependent angular analysis of B0s→J/ψϕ decays is presented where the J/ψ meson is reconstructed through its decay to an e+e− pair. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and 8\,Te V, corresponding to an integrated luminosity of 3\,fb−1. The CP-violating phase and lifetime parameters of the B0s system are measured to be ϕs=0.00±0.28±0.07\,rad, ΔΓs=0.115±0.045±0.011\,ps−1 and Γs=0.608±0.018±0.012\,ps−1 where the first uncertainty is statistical and the second systematic. This is the first time that CP-violating parameters are measured in the B0s→J/ψϕ decay with an e+e− pair in the final state. The results are consistent with previous measurements in other channels and with the Standard Model predictions. |
| first_indexed | 2024-09-23T16:57:07Z |
| format | Article |
| id | mit-1721.1/138229 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T16:57:07Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1382292023-08-11T18:29:58Z First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A. Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alkhazov, G. Alvarez Cartelle, P. Amato, S. Amhis, Y. An, L. Massachusetts Institute of Technology. Department of Physics A flavour-tagged time-dependent angular analysis of B0s→J/ψϕ decays is presented where the J/ψ meson is reconstructed through its decay to an e+e− pair. The analysis uses a sample of pp collision data recorded with the LHCb experiment at centre-of-mass energies of 7 and 8\,Te V, corresponding to an integrated luminosity of 3\,fb−1. The CP-violating phase and lifetime parameters of the B0s system are measured to be ϕs=0.00±0.28±0.07\,rad, ΔΓs=0.115±0.045±0.011\,ps−1 and Γs=0.608±0.018±0.012\,ps−1 where the first uncertainty is statistical and the second systematic. This is the first time that CP-violating parameters are measured in the B0s→J/ψϕ decay with an e+e− pair in the final state. The results are consistent with previous measurements in other channels and with the Standard Model predictions. 2021-11-29T16:13:29Z 2021-11-29T16:13:29Z 2021-11-24 2021-11-28T04:15:33Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/138229 The European Physical Journal C. 2021 Nov 24;81(11):1026 PUBLISHER_CC en https://doi.org/10.1140/epjc/s10052-021-09711-7 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ CERN for the benefit of the LHCb collaboration application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Aaij, R. Abellán Beteta, C. Ackernley, T. Adeva, B. Adinolfi, M. Afsharnia, H. Aidala, C. A. Aiola, S. Ajaltouni, Z. Akar, S. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Aliouche, Z. Alkhazov, G. Alvarez Cartelle, P. Amato, S. Amhis, Y. An, L. First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title | First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_full | First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_fullStr | First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_full_unstemmed | First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_short | First measurement of the CP-violating phase in B0s→J/ψ( → e+e−)ϕ decays |
| title_sort | first measurement of the cp violating phase in b0s j ψ e e ϕ decays |
| url | https://hdl.handle.net/1721.1/138229 |
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