Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -]
We report the first observation of the baryonic flavor-changing neutral current decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a pp̅ collisions data sample correspon...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | en_US |
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American Physical Society (APS)
2012
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| Online Access: | http://hdl.handle.net/1721.1/69197 https://orcid.org/0000-0002-6047-4211 |
| _version_ | 1826211813522407424 |
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| author | Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Bauer, Gerry P Makhoul, Khaldoun |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Bauer, Gerry P Makhoul, Khaldoun |
| author_sort | Gomez-Ceballos, Guillelmo |
| collection | MIT |
| description | We report the first observation of the baryonic flavor-changing neutral current decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a pp̅ collisions data sample corresponding to 6.8 fb[superscript -1] at √s=1.96 TeV collected by the CDF II detector at the Tevatron collider. The total and differential branching ratios for Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] are measured. We find B(Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -])=[1.73±0.42(stat)±(syst)]×10[superscript -6]. We also report the first measurement of the differential branching ratio of B[subscript s][superscript 0]→ϕμ[superscript +]μ[superscript -], using 49 signal events. In addition, we report branching ratios for B+→K+μ[superscript +]μ[superscript -], B[superscript 0]→K[superscript 0]μ[superscript +]μ[superscript -], and B→K[superscript *](892)μ[superscript +]μ[superscript -] decays. |
| first_indexed | 2024-09-23T15:11:48Z |
| format | Article |
| id | mit-1721.1/69197 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T15:11:48Z |
| publishDate | 2012 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/691972023-02-26T04:21:52Z Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] Observation of the Baryonic Flavor-Changing Neutral Current Decay Λb0→Λμ+μ- Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Bauer, Gerry P Makhoul, Khaldoun Massachusetts Institute of Technology. Department of Physics Massachusetts Institute of Technology. Laboratory for Nuclear Science Bauer, Gerry P. Bauer, Gerry P. Gomez-Ceballos, Guillelmo Goncharov, Maxim Makhoul, K. Paus, Christoph M. E. We report the first observation of the baryonic flavor-changing neutral current decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] with 24 signal events and a statistical significance of 5.8 Gaussian standard deviations. This measurement uses a pp̅ collisions data sample corresponding to 6.8 fb[superscript -1] at √s=1.96 TeV collected by the CDF II detector at the Tevatron collider. The total and differential branching ratios for Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] are measured. We find B(Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -])=[1.73±0.42(stat)±(syst)]×10[superscript -6]. We also report the first measurement of the differential branching ratio of B[subscript s][superscript 0]→ϕμ[superscript +]μ[superscript -], using 49 signal events. In addition, we report branching ratios for B+→K+μ[superscript +]μ[superscript -], B[superscript 0]→K[superscript 0]μ[superscript +]μ[superscript -], and B→K[superscript *](892)μ[superscript +]μ[superscript -] decays. National Science Foundation (U.S.) United States. Dept. of Energy Alfred P. Sloan Foundation 2012-02-24T18:33:31Z 2012-02-24T18:33:31Z 2011-11 2011-07 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/69197 Aaltonen, T. et al. “Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ_{b}^{0}→Λμ^{+}μ^{-}.” Physical Review Letters 107.20 (2011): n. pag. Web. 24 Feb. 2012. © 2011 American Physical Society https://orcid.org/0000-0002-6047-4211 en_US http://dx.doi.org/10.1103/PhysRevLett.107.201802 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) APS |
| spellingShingle | Gomez-Ceballos, Guillelmo Goncharov, Maxim Paus, Christoph M. E. Bauer, Gerry P Makhoul, Khaldoun Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] |
| title | Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] |
| title_full | Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] |
| title_fullStr | Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] |
| title_full_unstemmed | Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] |
| title_short | Observation of the Baryonic Flavor-Changing Neutral Current Decay Λ[subscript b][superscript 0]→Λμ[superscript +]μ[superscript -] |
| title_sort | observation of the baryonic flavor changing neutral current decay λ subscript b superscript 0 λμ superscript μ superscript |
| url | http://hdl.handle.net/1721.1/69197 https://orcid.org/0000-0002-6047-4211 |
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