Measurements of the Absolute Branching Fractions of $B^\pm \to K^\pm X\_{c\bar c}$
| Popis: | International audience; A study of the two body decays B$^{+}\rightarrow X_{c\bar c}$K$^{+}$, where X$_{c\bar c}$ refers to one charmonium state, is reported by the BABAR experiment using a data sample of 424 fb$^{-1}$. The absolute determination of many branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found at 3 $\sigma$ level for the decay B$^{+}\rightarrow X(3872)$K$^{+}$. The absolute branching fraction BR(B$^{+}\rightarrow X(3872)$K$^{+}$) = (2.1$\pm$0.6(stat)$\pm$0.3(syst))$\cdot$10$^{-4}$ is measured for the first time. From this, it follows that the branching fraction BR($X(3872)\\rightarrow J/\psi\pi^+\pi^-$) is equal to (4.1$\pm$1.3)\%, supporting the hypothesis of a molecular component for this resonance. |
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| Jazyk: | English |
| DOI: | 10.1016/j.nuclphysbps.2019.11.026⟩ |
| DOI: | 10.22323/1.364.0481⟩ |
| Přístupová URL adresa: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::450839f33f7c4f61e8478ed22de1b92a https://hal.archives-ouvertes.fr/hal-02911950 |
| Rights: | OPEN |
| Přírůstkové číslo: | edsair.doi.dedup.....450839f33f7c4f61e8478ed22de1b92a |
| Autor: | Guy Henri Maurice Wormser |
| Přispěvatelé: | Laboratoire de l'Accélérateur Linéaire (LAL), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), BaBar, Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
X(3872) --> J/psi(3100) pi+ pi
J/psi(3100) B+: branching ratio: measured Analytical chemistry X(3872): branching ratio: measured electron positron: annihilation Branching (polymer chemistry) charmonium: electroproduction X(3872) quantum chromodynamics [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex] X(3872): hadronic decay High Energy Physics talk: Montpellier 2019/07/02 Physics Branching fraction Resonance electron positron: colliding beams B-: hadronic decay SLAC PEP Stor QCD talk: Ghent 2019/07/10 BaBar B+: hadronic decay B+ --> X(3872) K+ pi: pair production Bar (unit) experimental results |
| Zdroj: | Nucl.Part.Phys.Proc. 22nd High-Energy Physics International Conference in Quantum Chromodynamics 22nd High-Energy Physics International Conference in Quantum Chromodynamics, Jul 2019, Montpellier, France. pp.152-157, ⟨10.1016/j.nuclphysbps.2019.11.026⟩ PoS 2019 European Physical Society Conference on High Energy Physics 2019 European Physical Society Conference on High Energy Physics, Jul 2019, Ghent, Belgium. pp.481, ⟨10.22323/1.364.0481⟩ |
| DOI: | 10.1016/j.nuclphysbps.2019.11.026⟩ |
| Popis: | International audience; A study of the two body decays B$^{+}\rightarrow X_{c\bar c}$K$^{+}$, where X$_{c\bar c}$ refers to one charmonium state, is reported by the BABAR experiment using a data sample of 424 fb$^{-1}$. The absolute determination of many branching fractions for these decays are significantly improved compared to previous BABAR measurements. Evidence is found at 3 $\sigma$ level for the decay B$^{+}\rightarrow X(3872)$K$^{+}$. The absolute branching fraction BR(B$^{+}\rightarrow X(3872)$K$^{+}$) = (2.1$\pm$0.6(stat)$\pm$0.3(syst))$\cdot$10$^{-4}$ is measured for the first time. From this, it follows that the branching fraction BR($X(3872)\\rightarrow J/\psi\pi^+\pi^-$) is equal to (4.1$\pm$1.3)\%, supporting the hypothesis of a molecular component for this resonance. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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