Measurement of CP violation in the Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decay and search for the B0→ ϕϕ decay
Abstract A measurement of the time-dependent CP-violating asymmetry in Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decays is presented. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.0 fb−1 collected by the LHCb experiment at centre-of-mass energi...
| Main Authors: | , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Springer Berlin Heidelberg
2021
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| Online Access: | https://hdl.handle.net/1721.1/131654 |
| _version_ | 1826200626267160576 |
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| author | Aaij, R. Abellán Beteta, C. Adeva, B. Adinolfi, M. Aidala, C. A Ajaltouni, Z. Akar, S. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. Alvarez Cartelle, P. Alves, A. A Amato, S. Amhis, Y. An, L. Anderlini, L. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Aaij, R. Abellán Beteta, C. Adeva, B. Adinolfi, M. Aidala, C. A Ajaltouni, Z. Akar, S. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. Alvarez Cartelle, P. Alves, A. A Amato, S. Amhis, Y. An, L. Anderlini, L. |
| author_sort | Aaij, R. |
| collection | MIT |
| description | Abstract
A measurement of the time-dependent CP-violating asymmetry in Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decays is presented. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.0 fb−1 collected by the LHCb experiment at centre-of-mass energies s$$ \sqrt{s} $$ = 7 TeV in 2011, 8 TeV in 2012 and 13 TeV in 2015 and 2016, a signal yield of around 9000 Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decays is obtained. The CP-violating phase ϕsss¯s$$ {\phi}_s^{s\overline{s}s} $$ is measured to be −0.073 ± 0.115(stat) ± 0.027(syst) rad, under the assumption it is independent of the helicity of the ϕϕ decay. In addition, the CP-violating phases of the transverse polarisations under the assumption of CP conservation of the longitudinal phase are measured. The helicity-independent direct CP-violation parameter is also measured, and is found to be |λ| = 0.99 ± 0.05(stat) ± 0.01(syst). In addition, T-odd triple-product asymmetries are measured. The results obtained are consistent with the hypothesis of CP conservation in b¯→s¯ss¯s$$ \overline{b}\to \overline{s}s\overline{s}s $$ transitions. Finally, a limit on the branching fraction of the B0 → ϕϕ decay is determined to be BB0→ϕϕ<2.7×10−8$$ \mathcal{B}\left({B}^0\to \phi \phi \right)<2.7\times {10}^{-8} $$ at 90 % confidence level. |
| first_indexed | 2024-09-23T11:39:21Z |
| format | Article |
| id | mit-1721.1/131654 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T11:39:21Z |
| publishDate | 2021 |
| publisher | Springer Berlin Heidelberg |
| record_format | dspace |
| spelling | mit-1721.1/1316542023-12-14T15:08:06Z Measurement of CP violation in the Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decay and search for the B0→ ϕϕ decay Aaij, R. Abellán Beteta, C. Adeva, B. Adinolfi, M. Aidala, C. A Ajaltouni, Z. Akar, S. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. Alvarez Cartelle, P. Alves, A. A Amato, S. Amhis, Y. An, L. Anderlini, L. Massachusetts Institute of Technology. Department of Physics Abstract A measurement of the time-dependent CP-violating asymmetry in Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decays is presented. Using a sample of proton-proton collision data corresponding to an integrated luminosity of 5.0 fb−1 collected by the LHCb experiment at centre-of-mass energies s$$ \sqrt{s} $$ = 7 TeV in 2011, 8 TeV in 2012 and 13 TeV in 2015 and 2016, a signal yield of around 9000 Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decays is obtained. The CP-violating phase ϕsss¯s$$ {\phi}_s^{s\overline{s}s} $$ is measured to be −0.073 ± 0.115(stat) ± 0.027(syst) rad, under the assumption it is independent of the helicity of the ϕϕ decay. In addition, the CP-violating phases of the transverse polarisations under the assumption of CP conservation of the longitudinal phase are measured. The helicity-independent direct CP-violation parameter is also measured, and is found to be |λ| = 0.99 ± 0.05(stat) ± 0.01(syst). In addition, T-odd triple-product asymmetries are measured. The results obtained are consistent with the hypothesis of CP conservation in b¯→s¯ss¯s$$ \overline{b}\to \overline{s}s\overline{s}s $$ transitions. Finally, a limit on the branching fraction of the B0 → ϕϕ decay is determined to be BB0→ϕϕ<2.7×10−8$$ \mathcal{B}\left({B}^0\to \phi \phi \right)<2.7\times {10}^{-8} $$ at 90 % confidence level. 2021-09-20T17:29:22Z 2021-09-20T17:29:22Z 2019-12-23 2020-06-26T13:11:59Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/131654 Journal of High Energy Physics. 2019 Dec 23;2019(12):155 PUBLISHER_CC en https://doi.org/10.1007/JHEP12(2019)155 Creative Commons Attribution https://creativecommons.org/licenses/by/4.0/ The Author(s) application/pdf Springer Berlin Heidelberg Springer Berlin Heidelberg |
| spellingShingle | Aaij, R. Abellán Beteta, C. Adeva, B. Adinolfi, M. Aidala, C. A Ajaltouni, Z. Akar, S. Albicocco, P. Albrecht, J. Alessio, F. Alexander, M. Alfonso Albero, A. Alkhazov, G. Alvarez Cartelle, P. Alves, A. A Amato, S. Amhis, Y. An, L. Anderlini, L. Measurement of CP violation in the Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decay and search for the B0→ ϕϕ decay |
| title | Measurement of CP violation in the Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decay and search for the B0→ ϕϕ decay |
| title_full | Measurement of CP violation in the Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decay and search for the B0→ ϕϕ decay |
| title_fullStr | Measurement of CP violation in the Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decay and search for the B0→ ϕϕ decay |
| title_full_unstemmed | Measurement of CP violation in the Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decay and search for the B0→ ϕϕ decay |
| title_short | Measurement of CP violation in the Bs0→ϕϕ$$ {B}_s^0\to \phi \phi $$ decay and search for the B0→ ϕϕ decay |
| title_sort | measurement of cp violation in the bs0 ϕϕ b s 0 to phi phi decay and search for the b0 ϕϕ decay |
| url | https://hdl.handle.net/1721.1/131654 |
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