Study of the rare decays of Bs⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector
A study of the decays Bs⁰ → µ⁺µ⁻ and B⁰ → µ +µ⁻ has been performed using 26.3 fb⁻¹ of 13 TeV LHC proton-proton collision data collected with the ATLAS detector in 2015 and 2016. Since the detector resolution in µ ⁺µ⁻ invariant mass is comparable to the Bs⁰ -B⁰ mass difference, a single fit determine...
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| Autores principales: | , , , , , , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2019
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/125477 |
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I19-R120-10915-125477 |
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dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Física Hadron-Hadron scattering (experiment |
| spellingShingle |
Física Hadron-Hadron scattering (experiment Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo Study of the rare decays of Bs⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector |
| topic_facet |
Física Hadron-Hadron scattering (experiment |
| description |
A study of the decays Bs⁰ → µ⁺µ⁻ and B⁰ → µ +µ⁻ has been performed using 26.3 fb⁻¹ of 13 TeV LHC proton-proton collision data collected with the ATLAS detector in 2015 and 2016. Since the detector resolution in µ ⁺µ⁻ invariant mass is comparable to the Bs⁰ -B⁰ mass difference, a single fit determines the signal yields for both decay modes.
This results in a measurement of the branching fraction B(Bs⁰ → µ⁺µ⁻) = 3.2 +1.1 −1.0x10⁻⁹ and an upper limit B(B⁰ → µ⁺µ⁻) < 4.3 × 10⁻¹⁰ at 95% confidence level. The result is combined with the Run 1 ATLAS result, yielding B(Bs⁰ → µ⁺µ⁻) = 2.8 +0.8 −0.7x 10⁻⁹ and B(B⁰ → µ+µ⁻) < 2.1 × 10⁻¹⁰ at 95% confidence level. The combined result is consistent with the Standard Model prediction within 2.4 standard deviations in the B(B⁰ → µ⁺µ⁻)- B(Bs⁰ → µ⁺µ⁻) plan |
| format |
Articulo Articulo |
| author |
Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo |
| author_facet |
Alconada Verzini, María Josefina Alonso, Francisco Arduh, Francisco Anuar Dova, María Teresa Hoya, Joaquín Monticelli, Fernando Gabriel Orellana, Gonzalo Enrique Wahlberg, Hernán Pablo |
| author_sort |
Alconada Verzini, María Josefina |
| title |
Study of the rare decays of Bs⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector |
| title_short |
Study of the rare decays of Bs⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector |
| title_full |
Study of the rare decays of Bs⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector |
| title_fullStr |
Study of the rare decays of Bs⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector |
| title_full_unstemmed |
Study of the rare decays of Bs⁰ and B⁰ mesons into muon pairs using data collected during 2015 and 2016 with the ATLAS detector |
| title_sort |
study of the rare decays of bs⁰ and b⁰ mesons into muon pairs using data collected during 2015 and 2016 with the atlas detector |
| publishDate |
2019 |
| url |
http://sedici.unlp.edu.ar/handle/10915/125477 |
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Repositorios |
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