Observation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -]
We report observations of CP violation in the decays B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] in a sample of 383×10[superscript 6] Υ(4S)→BB̅ events. We find 4372±82 B[superscript 0]→K[superscript +]π[superscript -] decays and measure the...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society
2012
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| Online Access: | http://hdl.handle.net/1721.1/71628 https://orcid.org/0000-0002-7586-7253 https://orcid.org/0000-0002-8667-5660 |
| _version_ | 1826209078748119040 |
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| author | Sciolla, Gabriella Sekula, S. J. Yamamoto, R. K. Cowan, Ray F Fisher, Peter H Spitznagel, Michael A Taylor, Frank E |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Sciolla, Gabriella Sekula, S. J. Yamamoto, R. K. Cowan, Ray F Fisher, Peter H Spitznagel, Michael A Taylor, Frank E |
| author_sort | Sciolla, Gabriella |
| collection | MIT |
| description | We report observations of CP violation in the decays B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] in a sample of 383×10[superscript 6] Υ(4S)→BB̅ events. We find 4372±82 B[superscript 0]→K[superscript +]π[superscript -] decays and measure the direct CP-violating charge asymmetry A[subscript Kπ]=-0.107±0.018(stat)[subscript -0.004][[superscript +0.007](syst), which excludes the CP-conserving hypothesis with a significance of 5.5 standard deviations. In the same sample, we find 1139±49 B[superscript 0]→π[superscript +]π[superscript -] decays and measure the CP-violating asymmetries S[subscript ππ]=-0.60±0.11(stat)±0.03(syst) and C[subscript ππ]=-0.21±0.09(stat)±0.02(syst). CP conservation in B[superscript 0]→π[superscript +]π[superscript -] (S[subscript ππ]=C[subscript ππ]=0) is excluded at a confidence level 1-C.L.=8×10[superscript -8], corresponding to 5.4 standard deviations. |
| first_indexed | 2024-09-23T14:16:53Z |
| format | Article |
| id | mit-1721.1/71628 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:16:53Z |
| publishDate | 2012 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/716282023-02-26T04:28:26Z Observation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] Sciolla, Gabriella Sekula, S. J. Yamamoto, R. K. Cowan, Ray F Fisher, Peter H Spitznagel, Michael A Taylor, Frank E Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Fisher, Peter H. Cowan, Ray Franklin Fisher, Peter H. Sciolla, Gabriella Sekula, S. J. Spitznagel, M. Taylor, Frank E. Yamamoto, R. K. We report observations of CP violation in the decays B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] in a sample of 383×10[superscript 6] Υ(4S)→BB̅ events. We find 4372±82 B[superscript 0]→K[superscript +]π[superscript -] decays and measure the direct CP-violating charge asymmetry A[subscript Kπ]=-0.107±0.018(stat)[subscript -0.004][[superscript +0.007](syst), which excludes the CP-conserving hypothesis with a significance of 5.5 standard deviations. In the same sample, we find 1139±49 B[superscript 0]→π[superscript +]π[superscript -] decays and measure the CP-violating asymmetries S[subscript ππ]=-0.60±0.11(stat)±0.03(syst) and C[subscript ππ]=-0.21±0.09(stat)±0.02(syst). CP conservation in B[superscript 0]→π[superscript +]π[superscript -] (S[subscript ππ]=C[subscript ππ]=0) is excluded at a confidence level 1-C.L.=8×10[superscript -8], corresponding to 5.4 standard deviations. 2012-07-16T18:22:15Z 2012-07-16T18:22:15Z 2007-07 2007-03 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/71628 B. Aubert et al. BABAR Collaboration. "Observation of CP Violation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -]" Physical Review Letters 99, 021603 (2007). © 2007 The American Physical Society https://orcid.org/0000-0002-7586-7253 https://orcid.org/0000-0002-8667-5660 en_US http://dx.doi.org/10.1103/PhysRevLett.99.021603 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 APS |
| spellingShingle | Sciolla, Gabriella Sekula, S. J. Yamamoto, R. K. Cowan, Ray F Fisher, Peter H Spitznagel, Michael A Taylor, Frank E Observation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] |
| title | Observation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] |
| title_full | Observation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] |
| title_fullStr | Observation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] |
| title_full_unstemmed | Observation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] |
| title_short | Observation of CP Violation in B[superscript 0]→K[superscript +]π[superscript -] and B[superscript 0]→π[superscript +]π[superscript -] |
| title_sort | observation of cp violation in b superscript 0 k superscript π superscript and b superscript 0 π superscript π superscript |
| url | http://hdl.handle.net/1721.1/71628 https://orcid.org/0000-0002-7586-7253 https://orcid.org/0000-0002-8667-5660 |
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