Study of the lineshape of the χ c 1 ( 3872 ) state
© 2020 CERN. A study of the lineshape of the χc1(3872) state is made using a data sample corresponding to an integrated luminosity of 3 fb-1 collected in pp collisions at center-of-mass energies of 7 and 8 TeV with the LHCb detector. Candidate χc1(3872) and ψ(2S) mesons from b-hadron decays are sele...
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| Format: | Article |
| Language: | English |
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American Physical Society (APS)
2022
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| Online Access: | https://hdl.handle.net/1721.1/142459 |
| _version_ | 1811070872575803392 |
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| author | Williams, Michael |
| author_facet | Williams, Michael |
| author_sort | Williams, Michael |
| collection | MIT |
| description | © 2020 CERN. A study of the lineshape of the χc1(3872) state is made using a data sample corresponding to an integrated luminosity of 3 fb-1 collected in pp collisions at center-of-mass energies of 7 and 8 TeV with the LHCb detector. Candidate χc1(3872) and ψ(2S) mesons from b-hadron decays are selected in the J/ψπ+π- decay mode. Describing the lineshape with a Breit-Wigner function, the mass splitting between the χc1(3872) and ψ(2S) states, Δm, and the width of the χc1(3872) state, ΓBW, are determined to be Δm=185.598±0.067±0.068 MeV,ΓBW=1.39±0.24±0.10 MeV, where the first uncertainty is statistical and the second systematic. Using a Flatté-inspired model, the mode and full width at half maximum of the lineshape are determined to be mode=3871.69-0.04-0.13+0.00+0.05 MeV,FWHM=0.22-0.06-0.13+0.07+0.11 MeV. An investigation of the analytic structure of the Flatté amplitude reveals a pole structure, which is compatible with a quasibound D0D¯∗0 state but a quasivirtual state is still allowed at the level of 2 standard deviations. |
| first_indexed | 2024-09-23T08:43:01Z |
| format | Article |
| id | mit-1721.1/142459 |
| institution | Massachusetts Institute of Technology |
| language | English |
| last_indexed | 2024-09-23T08:43:01Z |
| publishDate | 2022 |
| publisher | American Physical Society (APS) |
| record_format | dspace |
| spelling | mit-1721.1/1424592022-05-12T03:40:32Z Study of the lineshape of the χ c 1 ( 3872 ) state Williams, Michael © 2020 CERN. A study of the lineshape of the χc1(3872) state is made using a data sample corresponding to an integrated luminosity of 3 fb-1 collected in pp collisions at center-of-mass energies of 7 and 8 TeV with the LHCb detector. Candidate χc1(3872) and ψ(2S) mesons from b-hadron decays are selected in the J/ψπ+π- decay mode. Describing the lineshape with a Breit-Wigner function, the mass splitting between the χc1(3872) and ψ(2S) states, Δm, and the width of the χc1(3872) state, ΓBW, are determined to be Δm=185.598±0.067±0.068 MeV,ΓBW=1.39±0.24±0.10 MeV, where the first uncertainty is statistical and the second systematic. Using a Flatté-inspired model, the mode and full width at half maximum of the lineshape are determined to be mode=3871.69-0.04-0.13+0.00+0.05 MeV,FWHM=0.22-0.06-0.13+0.07+0.11 MeV. An investigation of the analytic structure of the Flatté amplitude reveals a pole structure, which is compatible with a quasibound D0D¯∗0 state but a quasivirtual state is still allowed at the level of 2 standard deviations. 2022-05-11T12:50:13Z 2022-05-11T12:50:13Z 2020 2022-05-11T12:47:40Z Article http://purl.org/eprint/type/JournalArticle https://hdl.handle.net/1721.1/142459 Williams, Michael. 2020. "Study of the lineshape of the χ c 1 ( 3872 ) state." Physical Review D, 102 (9). en 10.1103/PHYSREVD.102.092005 Physical Review D Creative Commons Attribution 4.0 International License https://creativecommons.org/licenses/by/4.0 application/pdf American Physical Society (APS) APS |
| spellingShingle | Williams, Michael Study of the lineshape of the χ c 1 ( 3872 ) state |
| title | Study of the lineshape of the χ c 1 ( 3872 ) state |
| title_full | Study of the lineshape of the χ c 1 ( 3872 ) state |
| title_fullStr | Study of the lineshape of the χ c 1 ( 3872 ) state |
| title_full_unstemmed | Study of the lineshape of the χ c 1 ( 3872 ) state |
| title_short | Study of the lineshape of the χ c 1 ( 3872 ) state |
| title_sort | study of the lineshape of the χ c 1 3872 state |
| url | https://hdl.handle.net/1721.1/142459 |
| work_keys_str_mv | AT williamsmichael studyofthelineshapeofthechc13872state |