Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates
© 2019 CERN. for the LHCb Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the publi...
| Main Authors: | , , , , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2022
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| Online Access: | https://hdl.handle.net/1721.1/136061.2 |
| _version_ | 1811091540950384640 |
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| author | The LHCb Collaboration Boettcher, Thomas Julian Craik, Daniel C Weisser, Constantin Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics The LHCb Collaboration Boettcher, Thomas Julian Craik, Daniel C Weisser, Constantin Williams, Michael |
| author_sort | The LHCb Collaboration |
| collection | MIT |
| description | © 2019 CERN. for the LHCb Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We report a measurement of the mass difference between neutral charm-meson eigenstates using a novel approach that enhances sensitivity to this parameter. We use 2.3×106 D0→KS0π+π- decays reconstructed in proton-proton collisions collected by the LHCb experiment in 2011 and 2012. Allowing for CP violation in mixing and in the interference between mixing and decay, we measure the CP-averaged normalized mass difference xCP=[2.7±1.6(stat)±0.4(syst)]×10-3 and the CP-violating parameter Δx=[-0.53±0.70(stat)±0.22(syst)]×10-3. The results are consistent with CP symmetry. These determinations are the most precise from a single experiment and, combined with current world-average results, yield the first evidence that the masses of the neutral charm-meson eigenstates differ. |
| first_indexed | 2024-09-23T15:03:59Z |
| format | Article |
| id | mit-1721.1/136061.2 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T15:03:59Z |
| publishDate | 2022 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/136061.22022-09-20T18:27:40Z Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates The LHCb Collaboration Boettcher, Thomas Julian Craik, Daniel C Weisser, Constantin Williams, Michael Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science © 2019 CERN. for the LHCb Collaboration. Published by the American Physical Society under the terms of the »https://creativecommons.org/licenses/by/4.0/» Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funded by SCOAP 3 . We report a measurement of the mass difference between neutral charm-meson eigenstates using a novel approach that enhances sensitivity to this parameter. We use 2.3×106 D0→KS0π+π- decays reconstructed in proton-proton collisions collected by the LHCb experiment in 2011 and 2012. Allowing for CP violation in mixing and in the interference between mixing and decay, we measure the CP-averaged normalized mass difference xCP=[2.7±1.6(stat)±0.4(syst)]×10-3 and the CP-violating parameter Δx=[-0.53±0.70(stat)±0.22(syst)]×10-3. The results are consistent with CP symmetry. These determinations are the most precise from a single experiment and, combined with current world-average results, yield the first evidence that the masses of the neutral charm-meson eigenstates differ. 2022-09-20T18:27:39Z 2021-10-27T20:30:36Z 2022-09-20T18:27:39Z 2019 2021-04-09T17:21:17Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136061.2 en 10.1103/PHYSREVLETT.122.231802 Physical Review Letters Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/octet-stream American Physical Society (APS) APS |
| spellingShingle | The LHCb Collaboration Boettcher, Thomas Julian Craik, Daniel C Weisser, Constantin Williams, Michael Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates |
| title | Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates |
| title_full | Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates |
| title_fullStr | Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates |
| title_full_unstemmed | Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates |
| title_short | Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates |
| title_sort | measurement of the mass difference between neutral charm meson eigenstates |
| url | https://hdl.handle.net/1721.1/136061.2 |
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