Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays
A search for time-dependent violation of the charge-parity symmetry in $D^0 \to K^+ K^-$ and $D^0 \to \pi^+ \pi^-$ decays is performed at the LHCb experiment using proton-proton collision data recorded from 2015 to 2018 at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosi...
| Main Author: | |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
American Physical Society (APS)
2022
|
| Online Access: | https://hdl.handle.net/1721.1/142442 |
| _version_ | 1811075133141417984 |
|---|---|
| author | Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Williams, Michael |
| author_sort | Williams, Michael |
| collection | MIT |
| description | A search for time-dependent violation of the charge-parity symmetry in $D^0
\to K^+ K^-$ and $D^0 \to \pi^+ \pi^-$ decays is performed at the LHCb
experiment using proton-proton collision data recorded from 2015 to 2018 at a
centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6
fb$^{-1}$. The $D^0$ meson is required to originate from a $D^*(2010)^+ \to D^0
\pi^+$ decay, such that its flavour at production is identified by the charge
of the accompanying pion. The slope of the time-dependent asymmetry of the
decay rates of $D^0$ and $\bar{D}^0$ mesons into the final states under
consideration is measured to be $\Delta Y_{K^+ K^-} = (-2.3 \pm 1.5 \pm 0.3)
\times 10^{-4}$, $\Delta Y_{\pi^+ \pi^-} = (-4.0 \pm 2.8 \pm 0.4)\times
10^{-4}$, where the first uncertainties are statistical and the second are
systematic. These results are compatible with the conservation of the
charge-parity symmetry at the level of 2 standard deviations and improve the
precision by nearly a factor of two. |
| first_indexed | 2024-09-23T10:01:21Z |
| format | Article |
| id | mit-1721.1/142442 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T10:01:21Z |
| publishDate | 2022 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1424422023-12-06T21:39:11Z Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays Williams, Michael Massachusetts Institute of Technology. Department of Physics A search for time-dependent violation of the charge-parity symmetry in $D^0 \to K^+ K^-$ and $D^0 \to \pi^+ \pi^-$ decays is performed at the LHCb experiment using proton-proton collision data recorded from 2015 to 2018 at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 6 fb$^{-1}$. The $D^0$ meson is required to originate from a $D^*(2010)^+ \to D^0 \pi^+$ decay, such that its flavour at production is identified by the charge of the accompanying pion. The slope of the time-dependent asymmetry of the decay rates of $D^0$ and $\bar{D}^0$ mesons into the final states under consideration is measured to be $\Delta Y_{K^+ K^-} = (-2.3 \pm 1.5 \pm 0.3) \times 10^{-4}$, $\Delta Y_{\pi^+ \pi^-} = (-4.0 \pm 2.8 \pm 0.4)\times 10^{-4}$, where the first uncertainties are statistical and the second are systematic. These results are compatible with the conservation of the charge-parity symmetry at the level of 2 standard deviations and improve the precision by nearly a factor of two. 2022-05-10T14:47:23Z 2022-05-10T14:47:23Z 2021 2022-05-10T14:43:59Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142442 Williams, Michael. 2021. "Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays." Physical Review D, 104 (7). en 10.1103/PHYSREVD.104.072010 Physical Review D Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0 application/pdf American Physical Society (APS) APS |
| spellingShingle | Williams, Michael Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays |
| title | Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays |
| title_full | Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays |
| title_fullStr | Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays |
| title_full_unstemmed | Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays |
| title_short | Search for time-dependent CP violation in D0→K+K− and D0→π+π− decays |
| title_sort | search for time dependent cp violation in d0 k k and d0 π π decays |
| url | https://hdl.handle.net/1721.1/142442 |
| work_keys_str_mv | AT williamsmichael searchfortimedependentcpviolationind0kkandd0ppdecays |