1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/264120</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Measurement Of The Cross Sections For ${E}^{+}{E}^{-}\To \Eta {\Pi }^{+}{\Pi }^{-}$ At Center-Of-Mass Energies Between 2.00 And 3.08 Gev</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2023</publicationYear>
  <dates>
    <date dateType="Issued">2023-01-01</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/264120</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1103/PhysRevD.108.L111101</relatedIdentifier>
  </relatedIdentifiers>
  <rightsList>
    <rights rightsURI="http://www.opendefinition.org/licenses/cc-by">Creative Commons Attribution</rights>
    <rights rightsURI="info:eu-repo/semantics/openAccess">Open Access</rights>
  </rightsList>
  <descriptions>
    <description descriptionType="Abstract">&lt;p&gt;Using data samples collected at center-of-mass energies between 2.000 and 3.080 GeV with the BESIII detector operating at the BEPCII collider, a partial-wave analysis is performed on the process ${e}^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$. In addition to the dominant ${e}^{+}{e}^{-}\to \rho \eta $ component, the ${e}^{+}{e}^{-}\to {a}_{2}\left(1320\right)\pi $ process is also sizable, contributing up to 24% of the total reaction. The measured cross sections of the process ${e}^{+}{e}^{-}\to \eta {\pi }^{+}{\pi }^{-}$ are systematically higher than those of BABAR by more than $3\sigma $ at center-of-mass energies between 2.000 and 2.300 GeV. In the cross section line shape for ${e}^{+}{e}^{-}\to {a}_{2}\left(1320\right)\pi $, a resonant structure is observed with a significance of $5.5\sigma $, with $M=\left(2044±31±4\right)\text{}\text{}\mathrm{MeV}/{c}^{2}$, $\Gamma =\left(163±69±24\right)\text{}\text{}\mathrm{MeV}$, and ${B}_{R}·{\Gamma }_{{e}^{+}{e}^{-}}^{R}=\left(34.6±17.1±6.0\right)\text{}\text{}\mathrm{eV}$ or $\left(137.1±73.3±2.1\right)\text{}\text{}\mathrm{eV}$. In the cross section line shape for ${e}^{+}{e}^{-}\to \rho \eta $, an evidence of a dip structure around $2180\text{}\text{}\mathrm{MeV}/{c}^{2}$ is observed with statistical significance of $3.0\sigma $.&lt;/p&gt;</description>
  </descriptions>
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