Measurement of the time-dependent CP asymmetry of partially reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] decays
We present a new measurement of the time-dependent CP asymmetry of B[superscript 0]→D[superscript *+]D[superscript *-] decays using (471±5) million BB̅ pairs collected with the BABAR detector at the PEP-II B Factory at the SLAC National Accelerator Laboratory. Using the technique of partial reconstr...
| Main Authors: | , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2013
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| Online Access: | http://hdl.handle.net/1721.1/77142 |
| _version_ | 1826198474423533568 |
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| author | Dujmic, Denis Sciolla, Gabriella Cowan, Ray F |
| author2 | Massachusetts Institute of Technology. Laboratory for Nuclear Science |
| author_facet | Massachusetts Institute of Technology. Laboratory for Nuclear Science Dujmic, Denis Sciolla, Gabriella Cowan, Ray F |
| author_sort | Dujmic, Denis |
| collection | MIT |
| description | We present a new measurement of the time-dependent CP asymmetry of B[superscript 0]→D[superscript *+]D[superscript *-] decays using (471±5) million BB̅ pairs collected with the BABAR detector at the PEP-II B Factory at the SLAC National Accelerator Laboratory. Using the technique of partial reconstruction, we measure the time-dependent CP asymmetry parameters S=-0.34±0.12±0.05 and C=+0.15±0.09±0.04. Using the value for the CP-odd fraction R[subscript ⊥]=0.158±0.028±0.006, previously measured by BABAR with fully reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] events, we extract the CP-even components S+=-0.49±0.18±0.07±0.04 and C+=+0.15±0.09±0.04. In each case, the first uncertainty is statistical and the second is systematic; the third uncertainty on S+ is the contribution from the uncertainty on R[subscript ⊥]. The measured value of the CP-even component S+ is consistent with the value of sin2β measured in b→(cc̅ )s transitions, and with the Standard Model expectation of small penguin contributions. |
| first_indexed | 2024-09-23T11:05:31Z |
| format | Article |
| id | mit-1721.1/77142 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:05:31Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/771422023-02-26T05:36:13Z Measurement of the time-dependent CP asymmetry of partially reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] decays Dujmic, Denis Sciolla, Gabriella Cowan, Ray F Massachusetts Institute of Technology. Laboratory for Nuclear Science Cowan, Ray Franklin Dujmic, Denis Sciolla, Gabriella We present a new measurement of the time-dependent CP asymmetry of B[superscript 0]→D[superscript *+]D[superscript *-] decays using (471±5) million BB̅ pairs collected with the BABAR detector at the PEP-II B Factory at the SLAC National Accelerator Laboratory. Using the technique of partial reconstruction, we measure the time-dependent CP asymmetry parameters S=-0.34±0.12±0.05 and C=+0.15±0.09±0.04. Using the value for the CP-odd fraction R[subscript ⊥]=0.158±0.028±0.006, previously measured by BABAR with fully reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] events, we extract the CP-even components S+=-0.49±0.18±0.07±0.04 and C+=+0.15±0.09±0.04. In each case, the first uncertainty is statistical and the second is systematic; the third uncertainty on S+ is the contribution from the uncertainty on R[subscript ⊥]. The measured value of the CP-even component S+ is consistent with the value of sin2β measured in b→(cc̅ )s transitions, and with the Standard Model expectation of small penguin contributions. United States. Dept. of Energy National Science Foundation (U.S.) 2013-02-15T15:26:56Z 2013-02-15T15:26:56Z 2012-12 2012-08 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1089-4918 http://hdl.handle.net/1721.1/77142 Lees, J. P. et al. “Measurement of the Time-dependent CP Asymmetry of Partially Reconstructed B^{0}→D^{*+}D^{*-} Decays.” Physical Review D 86.11 (2012). © 2012 American Physical Society en_US http://dx.doi.org/10.1103/PhysRevD.86.112006 Physical Review D 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 APS |
| spellingShingle | Dujmic, Denis Sciolla, Gabriella Cowan, Ray F Measurement of the time-dependent CP asymmetry of partially reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] decays |
| title | Measurement of the time-dependent CP asymmetry of partially reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] decays |
| title_full | Measurement of the time-dependent CP asymmetry of partially reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] decays |
| title_fullStr | Measurement of the time-dependent CP asymmetry of partially reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] decays |
| title_full_unstemmed | Measurement of the time-dependent CP asymmetry of partially reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] decays |
| title_short | Measurement of the time-dependent CP asymmetry of partially reconstructed B[superscript 0]→D[superscript *+]D[superscript *-] decays |
| title_sort | measurement of the time dependent cp asymmetry of partially reconstructed b superscript 0 d superscript d superscript decays |
| url | http://hdl.handle.net/1721.1/77142 |
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