Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays
Measurements of charm mixing parameters from the decay-time-dependent ratio of D[superscript 0] → K[superscript +]π[superscript −] to D[superscript 0] → K[superscript −]π[superscript +] rates and the charge-conjugate ratio are reported. The analysis uses data, corresponding to 3 fb[superscript −1]...
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2014
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| Online Access: | http://hdl.handle.net/1721.1/85207 https://orcid.org/0000-0001-8285-3346 |
| _version_ | 1826206600670478336 |
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| 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 | Measurements of charm mixing parameters from the decay-time-dependent ratio of D[superscript 0] → K[superscript +]π[superscript −] to D[superscript 0] → K[superscript −]π[superscript +] rates and the charge-conjugate ratio are reported. The analysis uses data, corresponding to 3 fb[superscript −1] of integrated luminosity, from proton-proton collisions at 7 and 8 TeV center-of-mass energies recorded by the LHCb experiment. In the limit of charge-parity (CP ) symmetry, the mixing parameters are determined to be x[superscript '2] = (5.5 ± 4.9) × 10[superscript −5], y[superscript ′] = (4.8 ± 1.0) × 10[superscript −3], and R[subscript D] = (3.568 ± 0.066) × 10[superscript −3]. Allowing for CP violation, the measurement is performed separately for D[superscript 0] and [line over D][superscript 0] mesons yielding A[subscript D] = (−0.7 ± 1.9)%, for the direct CP-violating asymmetry, and 0.75 < |q/p| < 1.24 at the 68.3% confidence level, for the parameter describing CP violation in mixing. This is the most precise determination of these parameters from a single experiment and shows no evidence for CP violation. |
| first_indexed | 2024-09-23T13:35:28Z |
| format | Article |
| id | mit-1721.1/85207 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:35:28Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/852072022-10-01T15:52:20Z Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays Williams, Michael Massachusetts Institute of Technology. Department of Physics Williams, Michael Measurements of charm mixing parameters from the decay-time-dependent ratio of D[superscript 0] → K[superscript +]π[superscript −] to D[superscript 0] → K[superscript −]π[superscript +] rates and the charge-conjugate ratio are reported. The analysis uses data, corresponding to 3 fb[superscript −1] of integrated luminosity, from proton-proton collisions at 7 and 8 TeV center-of-mass energies recorded by the LHCb experiment. In the limit of charge-parity (CP ) symmetry, the mixing parameters are determined to be x[superscript '2] = (5.5 ± 4.9) × 10[superscript −5], y[superscript ′] = (4.8 ± 1.0) × 10[superscript −3], and R[subscript D] = (3.568 ± 0.066) × 10[superscript −3]. Allowing for CP violation, the measurement is performed separately for D[superscript 0] and [line over D][superscript 0] mesons yielding A[subscript D] = (−0.7 ± 1.9)%, for the direct CP-violating asymmetry, and 0.75 < |q/p| < 1.24 at the 68.3% confidence level, for the parameter describing CP violation in mixing. This is the most precise determination of these parameters from a single experiment and shows no evidence for CP violation. National Science Foundation (U.S.) 2014-03-03T14:26:45Z 2014-03-03T14:26:45Z 2013-12 2013-09 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/85207 Aaij, R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. “Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays.” Physical Review Letters 111, no. 25 (December 2013). © 2013 CERN, for the LHCb Collaboration https://orcid.org/0000-0001-8285-3346 en_US http://dx.doi.org/10.1103/PhysRevLett.111.251801 Physical Review Letters Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Physical Society American Physical Society |
| spellingShingle | Williams, Michael Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays |
| title | Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays |
| title_full | Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays |
| title_fullStr | Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays |
| title_full_unstemmed | Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays |
| title_short | Measurement of D[superscript 0]–[line over D][subscript 0] Mixing Parameters and Search for CP Violation Using D[subscript 0] → K[subscript +]π[subscript -] Decays |
| title_sort | measurement of d superscript 0 line over d subscript 0 mixing parameters and search for cp violation using d subscript 0 k subscript π subscript decays |
| url | http://hdl.handle.net/1721.1/85207 https://orcid.org/0000-0001-8285-3346 |
| work_keys_str_mv | AT williamsmichael measurementofdsuperscript0lineoverdsubscript0mixingparametersandsearchforcpviolationusingdsubscript0ksubscriptpsubscriptdecays |