24 Aralık 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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    "description": "<p>Based on $\\left(10.09\u00b10.04\\right)\u00d7{10}^{9}\\text{}\\text{}J/\\psi $ events collected with the BESIII detector operating at the BEPCII collider, a partial wave analysis of the decay $J/\\psi \\to \\varphi {\\pi }^{0}\\eta $ is performed. We observe for the first time two new structures on the $\\varphi \\eta $ invariant mass distribution, with significances exceeding $27\\sigma $ and $13\\sigma $; the first with ${J}^{\\mathrm{PC}}={1}^{+-}$, mass $M=\\left(1908\u00b16\\left(\\mathrm{stat}\\right){\\text{}}_{-4}^{+8}\\left(\\mathrm{sys}\\right)\\right)\\text{}\\text{}\\mathrm{MeV}/{c}^{2}$, and width $\\Gamma =\\left(175\u00b113\\left(\\mathrm{stat}\\right){\\text{}}_{-16}^{+7}\\left(\\mathrm{sys}\\right)\\right)\\text{}\\text{}\\mathrm{MeV}$, the second with ${J}^{\\mathrm{PC}}={1}^{--}$, mass $M=\\left(1992\u00b112\\left(\\mathrm{stat}\\right){\\text{}}_{-6}^{+15}\\left(\\mathrm{sys}\\right)\\right)\\text{}\\text{}\\mathrm{MeV}/{c}^{2}$, and width $\\Gamma =\\left(132\u00b1\\phantom{\\rule{0ex}{0ex}}22\\left(\\mathrm{stat}\\right){\\text{}}_{-4}^{+17}\\left(\\mathrm{sys}\\right)\\right)\\text{}\\text{}\\mathrm{MeV}$. These measurements provide important input for the strangeonium spectrum. In addition, the ${f}_{0}\\left(980\\right)-{a}_{0}\\left(980{\\right)}^{0}$ mixing signal in $J/\\psi \\to \\varphi {f}_{0}\\left(980\\right)\\to \\varphi {a}_{0}\\left(980{\\right)}^{0}$ and the corresponding electromagnetic decay $J/\\psi \\to \\varphi {a}_{0}\\left(980{\\right)}^{0}$ are measured with improved precision, providing crucial information to understand the nature of ${a}_{0}\\left(980{\\right)}^{0}$ and ${f}_{0}\\left(980\\right)$.</p>", 
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      "issue": "11", 
      "title": "Physical Review D", 
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    "publication_date": "2024-12-24", 
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    "science_branches": [
      "Temel Bilimler > Fizik"
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    "title": "Study of the decay $J/\\psi \\to \\varphi {\\pi }^{0}\\eta $"
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