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1826191484106309632
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MIT
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© 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.
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2024-09-23T08:56:35Z
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Article
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mit-1721.1/136061
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| institution |
Massachusetts Institute of Technology
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| language |
English
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2024-09-23T08:56:35Z
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| publishDate |
2021
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| publisher |
American Physical Society (APS)
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dspace
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| spelling |
mit-1721.1/1360612022-04-01T17:20:48Z 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 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. 2021-10-27T20:30:36Z 2021-10-27T20:30:36Z 2019 2021-04-09T17:21:17Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/136061 en 10.1103/PHYSREVLETT.122.231802 Physical Review Letters Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ application/pdf American Physical Society (APS) APS
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| spellingShingle |
Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates
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| title |
Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates
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| title_full |
Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates
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| title_fullStr |
Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates
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| title_full_unstemmed |
Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates
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| title_short |
Measurement of the Mass Difference Between Neutral Charm-Meson Eigenstates
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| title_sort |
measurement of the mass difference between neutral charm meson eigenstates
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| url |
https://hdl.handle.net/1721.1/136061
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