1 Ocak 2015 Dergi makalesi Açık Erişim

CERN İşbirliği

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  <dc:creator>CERN İşbirliği</dc:creator>
  <dc:date>2015-01-01</dc:date>
  <dc:description>We have performed the first measurement of the coherent ψ(2S) photo-production cross section in ultra-peripheral Pb Pb collisions at the LHC. This charmonium excited state is reconstructed via the ψ(2S)→l+l− and ψ(2S)→J/ψπ+π− decays, where the J/ψ decays into two leptons. The analysis is based on an event sample corresponding to an integrated luminosity of about 22 μb−1 . The cross section for coherent ψ(2S) production in the rapidity interval −0.9&lt;y&lt;0.9 is dσψ(2S)coh/dy=0.83±0.19(stat+syst) mb . The ψ(2S) to J/ψ coherent cross section ratio is 0.34−0.07+0.08(stat+syst) . The obtained results are compared to predictions from theoretical models.</dc:description>
  <dc:identifier>https://aperta.ulakbim.gov.trrecord/108079</dc:identifier>
  <dc:identifier>oai:zenodo.org:108079</dc:identifier>
  <dc:rights>info:eu-repo/semantics/openAccess</dc:rights>
  <dc:rights>http://www.opendefinition.org/licenses/cc-by</dc:rights>
  <dc:source>Physics Letters B</dc:source>
  <dc:title>Coherent ψ (2S) photo-production in ultra-peripheral Pb Pb collisions at sNN=2.76 TeV</dc:title>
  <dc:type>info:eu-repo/semantics/article</dc:type>
  <dc:type>publication-article</dc:type>
</oai_dc:dc>