Observation of a Resonance in B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] Decays at Low Recoil
A broad peaking structure is observed in the dimuon spectrum of B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] decays in the kinematic region where the kaon has a low recoil against the dimuon system. The structure is consistent with interference between the B[superscript +]→K[sup...
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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/1721.1/81344 https://orcid.org/0000-0001-8285-3346 |
| _version_ | 1811079872111443968 |
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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 | A broad peaking structure is observed in the dimuon spectrum of B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] decays in the kinematic region where the kaon has a low recoil against the dimuon system. The structure is consistent with interference between the B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] decay and a resonance and has a statistical significance exceeding six standard deviations. The mean and width of the resonance are measured to be 4191[+9 over -8] MeV/c[superscript 2] and 65[+22 over -16] MeV/c[superscript 2], respectively, where the uncertainties include statistical and systematic contributions. These measurements are compatible with the properties of the ψ(4160) meson. First observations of both the decay B[superscript +]→ψ(4160)K[superscript +] and the subsequent decay ψ(4160)→μ[superscript +]μ[superscript -] are reported. The resonant decay and the interference contribution make up 20% of the yield for dimuon masses above 3770 MeV/c[superscript 2]. This contribution is larger than theoretical estimates. |
| first_indexed | 2024-09-23T11:21:55Z |
| format | Article |
| id | mit-1721.1/81344 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T11:21:55Z |
| publishDate | 2013 |
| publisher | American Physical Society |
| record_format | dspace |
| spelling | mit-1721.1/813442022-09-27T19:02:44Z Observation of a Resonance in B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] Decays at Low Recoil Williams, Michael Massachusetts Institute of Technology. Department of Physics Williams, Michael A broad peaking structure is observed in the dimuon spectrum of B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] decays in the kinematic region where the kaon has a low recoil against the dimuon system. The structure is consistent with interference between the B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] decay and a resonance and has a statistical significance exceeding six standard deviations. The mean and width of the resonance are measured to be 4191[+9 over -8] MeV/c[superscript 2] and 65[+22 over -16] MeV/c[superscript 2], respectively, where the uncertainties include statistical and systematic contributions. These measurements are compatible with the properties of the ψ(4160) meson. First observations of both the decay B[superscript +]→ψ(4160)K[superscript +] and the subsequent decay ψ(4160)→μ[superscript +]μ[superscript -] are reported. The resonant decay and the interference contribution make up 20% of the yield for dimuon masses above 3770 MeV/c[superscript 2]. This contribution is larger than theoretical estimates. National Science Foundation (U.S.) 2013-10-07T15:56:43Z 2013-10-07T15:56:43Z 2013-09 2013-08 Article http://purl.org/eprint/type/JournalArticle 0031-9007 1079-7114 http://hdl.handle.net/1721.1/81344 Aaij, R., B. Adeva, M. Adinolfi, C. Adrover, A. Affolder, Z. Ajaltouni, J. Albrecht, et al. “Observation of a Resonance in B^{+}→K^{+}μ^{+}μ^{-} Decays at Low Recoil.” Physical Review Letters 111, no. 11 (September 2013). © 2013 CERN https://orcid.org/0000-0001-8285-3346 en_US http://dx.doi.org/10.1103/PhysRevLett.111.112003 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 American Physical Society |
| spellingShingle | Williams, Michael Observation of a Resonance in B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] Decays at Low Recoil |
| title | Observation of a Resonance in B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] Decays at Low Recoil |
| title_full | Observation of a Resonance in B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] Decays at Low Recoil |
| title_fullStr | Observation of a Resonance in B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] Decays at Low Recoil |
| title_full_unstemmed | Observation of a Resonance in B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] Decays at Low Recoil |
| title_short | Observation of a Resonance in B[superscript +]→K[superscript +]μ[superscript +]μ[superscript -] Decays at Low Recoil |
| title_sort | observation of a resonance in b superscript k superscript μ superscript μ superscript decays at low recoil |
| url | http://hdl.handle.net/1721.1/81344 https://orcid.org/0000-0001-8285-3346 |
| work_keys_str_mv | AT williamsmichael observationofaresonanceinbsuperscriptksuperscriptmsuperscriptmsuperscriptdecaysatlowrecoil |