Measurement of the CP-violating phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] decays and limits on penguin effects
Time-dependent CP violation is measured in the [(-) over B][superscript 0] → [J over ψ]π[superscript +]π[superscript −] channel for each π[superscript +]π[superscript −] resonant final state using data collected with an integrated luminosity of 3.0 fb[superscript −1] in pp collisions using the LHC...
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| Format: | Article |
| Language: | en_US |
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Elsevier
2015
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| Online Access: | http://hdl.handle.net/1721.1/94637 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
| _version_ | 1811085744857415680 |
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| author | Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael |
| author_sort | Counts, Ian Thomas Hunt |
| collection | MIT |
| description | Time-dependent CP violation is measured in the [(-) over B][superscript 0] → [J over ψ]π[superscript +]π[superscript −] channel for each π[superscript +]π[superscript −] resonant final state using data collected with an integrated luminosity of 3.0 fb[superscript −1] in pp collisions using the LHCb detector. The final state with the largest rate, [J over ψρ][superscript 0](770), is used to measure the CP -violating angle 2β[superscript eff] to be (41.7±9.6[superscript +2.8][subscript -6.3])°. This result can be used to limit the size of penguin amplitude contributions to CP violation measurements in, for example, [(-) over B][superscript 0] [subscript s] → [J over ψϕ] decays. Assuming approximate SU(3) flavour symmetry and neglecting higher order diagrams, the shift in the CP-violating phase [subscript ϕs] is limited to be within the interval [−1.05°,+1.18°] at 95% confidence level. Changes to the limit due to SU(3) symmetry breaking effects are also discussed. |
| first_indexed | 2024-09-23T13:15:00Z |
| format | Article |
| id | mit-1721.1/94637 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:15:00Z |
| publishDate | 2015 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | mit-1721.1/946372023-02-26T07:52:04Z Measurement of the CP-violating phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] decays and limits on penguin effects Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Counts, Ian Thomas Hunt Ilten, Philip James Williams, M. Time-dependent CP violation is measured in the [(-) over B][superscript 0] → [J over ψ]π[superscript +]π[superscript −] channel for each π[superscript +]π[superscript −] resonant final state using data collected with an integrated luminosity of 3.0 fb[superscript −1] in pp collisions using the LHCb detector. The final state with the largest rate, [J over ψρ][superscript 0](770), is used to measure the CP -violating angle 2β[superscript eff] to be (41.7±9.6[superscript +2.8][subscript -6.3])°. This result can be used to limit the size of penguin amplitude contributions to CP violation measurements in, for example, [(-) over B][superscript 0] [subscript s] → [J over ψϕ] decays. Assuming approximate SU(3) flavour symmetry and neglecting higher order diagrams, the shift in the CP-violating phase [subscript ϕs] is limited to be within the interval [−1.05°,+1.18°] at 95% confidence level. Changes to the limit due to SU(3) symmetry breaking effects are also discussed. National Science Foundation (U.S.) 2015-02-19T17:04:09Z 2015-02-19T17:04:09Z 2015-01 2014-12 Article http://purl.org/eprint/type/JournalArticle 03702693 http://hdl.handle.net/1721.1/94637 “Measurement of the CP-Violating Phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] Decays and Limits on Penguin Effects.” Physics Letters B 742 (March 2015): 38–49. https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 en_US http://dx.doi.org/10.1016/j.physletb.2015.01.008 Physics Letters B Creative Commons Attribution http://creativecommons.org/licenses/by/4.0/ application/pdf Elsevier Elsevier |
| spellingShingle | Counts, Ian Thomas Hunt Ilten, Philip J Williams, Michael Measurement of the CP-violating phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] decays and limits on penguin effects |
| title | Measurement of the CP-violating phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] decays and limits on penguin effects |
| title_full | Measurement of the CP-violating phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] decays and limits on penguin effects |
| title_fullStr | Measurement of the CP-violating phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] decays and limits on penguin effects |
| title_full_unstemmed | Measurement of the CP-violating phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] decays and limits on penguin effects |
| title_short | Measurement of the CP-violating phase β in B[superscript 0] → [J over ψ π[superscript +] π[superscript -]] decays and limits on penguin effects |
| title_sort | measurement of the cp violating phase β in b superscript 0 j over ψ π superscript π superscript decays and limits on penguin effects |
| url | http://hdl.handle.net/1721.1/94637 https://orcid.org/0000-0001-8285-3346 https://orcid.org/0000-0002-4670-1334 https://orcid.org/0000-0001-5534-1732 |
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