First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays
The first observation of the [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript −] decay is presented with a data sample corresponding to an integrated luminosity of 1.0 fb[superscript −1] of pp collisions at a center-of-mass energy of 7 TeV collected with the LHCb detector. The branching...
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| Formato: | Artigo |
| Idioma: | en_US |
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American Physical Society
2014
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| Acesso em linha: | http://hdl.handle.net/1721.1/84654 https://orcid.org/0000-0001-8285-3346 |
| _version_ | 1826201195225546752 |
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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 | The first observation of the [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript −] decay is presented with a data sample corresponding to an integrated luminosity of 1.0 fb[superscript −1] of pp collisions at a center-of-mass energy of 7 TeV collected with the LHCb detector. The branching fraction is measured to be B([¯ over B][superscript 0 → J/ψK[superscript +]K[superscript −]) = (2.53 ± 0.31 ± 0.19) × 10[superscript −6], where the first uncertainty is statistical and the second is systematic. An amplitude analysis of the final state in the [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript −] decay is performed to separate resonant and nonresonant contributions in the K[superscript +]K[superscript −] spectrum. Evidence of the a[subscript 0](980) resonance is reported with statistical significance of 3.9 standard deviations. The corresponding product branching fraction is measured to be B([¯ over B][superscript 0] → J/ψa[subscript 0](980), a[subscript 0](980) → K[superscript +]K[superscript −]) = (4.70 ± 3.31 ± 0.72) × 10[superscript −7], yielding an upper limit of B([¯ over B][superscript 0] → J/ψa[subscript 0](980), a[subscript 0](980) → K[superscript +]K[superscript −]) < 9.0 × 10[superscript −7] at 90% confidence level. No evidence of the resonant decay [¯ over B][superscript 0] → J/ψϕ is found, and an upper limit on its branching fraction is set to be B([¯ over B][superscript 0] → J/ψϕ) < 1.9 × 10[superscript −7] at 90% confidence level. |
| first_indexed | 2024-09-23T11:47:42Z |
| format | Article |
| id | mit-1721.1/84654 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:47:42Z |
| publishDate | 2014 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/846542022-09-27T21:57:09Z First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays Williams, Michael Massachusetts Institute of Technology. Department of Physics Williams, Michael The first observation of the [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript −] decay is presented with a data sample corresponding to an integrated luminosity of 1.0 fb[superscript −1] of pp collisions at a center-of-mass energy of 7 TeV collected with the LHCb detector. The branching fraction is measured to be B([¯ over B][superscript 0 → J/ψK[superscript +]K[superscript −]) = (2.53 ± 0.31 ± 0.19) × 10[superscript −6], where the first uncertainty is statistical and the second is systematic. An amplitude analysis of the final state in the [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript −] decay is performed to separate resonant and nonresonant contributions in the K[superscript +]K[superscript −] spectrum. Evidence of the a[subscript 0](980) resonance is reported with statistical significance of 3.9 standard deviations. The corresponding product branching fraction is measured to be B([¯ over B][superscript 0] → J/ψa[subscript 0](980), a[subscript 0](980) → K[superscript +]K[superscript −]) = (4.70 ± 3.31 ± 0.72) × 10[superscript −7], yielding an upper limit of B([¯ over B][superscript 0] → J/ψa[subscript 0](980), a[subscript 0](980) → K[superscript +]K[superscript −]) < 9.0 × 10[superscript −7] at 90% confidence level. No evidence of the resonant decay [¯ over B][superscript 0] → J/ψϕ is found, and an upper limit on its branching fraction is set to be B([¯ over B][superscript 0] → J/ψϕ) < 1.9 × 10[superscript −7] at 90% confidence level. National Science Foundation (U.S.) 2014-02-03T19:27:28Z 2014-02-03T19:27:28Z 2013-10 2013-08 Article http://purl.org/eprint/type/JournalArticle 1550-7998 1550-2368 http://hdl.handle.net/1721.1/84654 Aaij, R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. “First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays.” Physical Review D 88, no. 7 (October 2013). © 2013 CERN, for the LHCb collaboration https://orcid.org/0000-0001-8285-3346 en_US http://dx.doi.org/10.1103/PhysRevD.88.072005 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 American Physical Society |
| spellingShingle | Williams, Michael First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays |
| title | First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays |
| title_full | First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays |
| title_fullStr | First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays |
| title_full_unstemmed | First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays |
| title_short | First observation of [¯ over B][superscript 0] → J/ψK[superscript +]K[superscript -] and search for [¯ over B][superscript 0] → J/ψϕ decays |
| title_sort | first observation of ¯ over b superscript 0 j ψk superscript k superscript and search for ¯ over b superscript 0 j ψϕ decays |
| url | http://hdl.handle.net/1721.1/84654 https://orcid.org/0000-0001-8285-3346 |
| work_keys_str_mv | AT williamsmichael firstobservationofoverbsuperscript0jpsksuperscriptksuperscriptandsearchforoverbsuperscript0jpsphdecays |