1 Ocak 2023 Dergi makalesi Açık Erişim

CERN İşbirliği

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<oai_dc:dc xmlns:dc="http://purl.org/dc/elements/1.1/" xmlns:oai_dc="http://www.openarchives.org/OAI/2.0/oai_dc/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.openarchives.org/OAI/2.0/oai_dc/ http://www.openarchives.org/OAI/2.0/oai_dc.xsd">
  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2023-01-01</dc:date>
  <dc:description>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 $.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/264120</dc:identifier>
  <dc:identifier>oai:aperta.ulakbim.gov.tr:264120</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>Physical Review D 108(11)</dc:source>
  <dc: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</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>