5 Eylül 2024 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <identifier identifierType="URL">https://aperta.ulakbim.gov.tr/record/274725</identifier>
  <creators>
    <creator>
      <creatorName>CERN İşbirliği</creatorName>
      <affiliation>CERN</affiliation>
    </creator>
  </creators>
  <titles>
    <title>Studies Of The Energy Dependence Of Diboson Polarization Fractions And The Radiation-Amplitude-Zero Effect In $Wz$ Production With The Atlas Detector</title>
  </titles>
  <publisher>Aperta</publisher>
  <publicationYear>2024</publicationYear>
  <dates>
    <date dateType="Issued">2024-09-05</date>
  </dates>
  <resourceType resourceTypeGeneral="Text">Journal article</resourceType>
  <alternateIdentifiers>
    <alternateIdentifier alternateIdentifierType="url">https://aperta.ulakbim.gov.tr/record/274725</alternateIdentifier>
  </alternateIdentifiers>
  <relatedIdentifiers>
    <relatedIdentifier relatedIdentifierType="DOI" relationType="IsIdenticalTo">10.1103/PhysRevLett.133.101802</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;This Letter presents the first study of the energy dependence of diboson polarization fractions in $WZ\to \ell \nu {\ell }^{\prime }{\ell }^{\prime }\left(\ell ,{\ell }^{\prime }=e,\mu \right)$ production. The dataset used corresponds to an integrated luminosity of $140\text{}\text{}{\mathrm{fb}}^{-1}$ of proton-proton collisions at a center-of-mass energy of 13 TeV recorded by the ATLAS detector. Two fiducial regions with an enhanced presence of events featuring two longitudinally polarized bosons are defined. A nonzero fraction of events with two longitudinally polarized bosons is measured with an observed significance of 5.3 standard deviations in the region with $100&amp;lt;{p}_{T}^{Z}\le 200\text{}\text{}\mathrm{GeV}$ and 1.6 standard deviations in the region with ${p}_{T}^{Z}&amp;gt;200\text{}\text{}\mathrm{GeV}$, where ${p}_{T}^{Z}$ is the transverse momentum of the $Z$ boson. This Letter also reports the first study of the radiation-amplitude-zero effect. Events with two transversely polarized bosons are analyzed for the $\Delta Y\left({\ell }_{W}Z\right)$ and $\Delta Y\left(WZ\right)$ distributions defined respectively as the rapidity difference between the lepton from the $W$ boson decay and the $Z$ boson and the rapidity difference between the $W$ boson and the $Z$ boson. Significant suppression of events near zero is observed in both distributions. Unfolded $\Delta Y\left({\ell }_{W}Z\right)$ and $\Delta Y\left(WZ\right)$ distributions are also measured and compared to theoretical predictions.&lt;/p&gt;</description>
  </descriptions>
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