1 Ocak 2019 Dergi makalesi Açık Erişim

CERN İşbirliği

MARC21 XML

<?xml version='1.0' encoding='UTF-8'?>
<record xmlns="http://www.loc.gov/MARC21/slim">
  <leader>00000nam##2200000uu#4500</leader>
  <datafield tag="909" ind1="C" ind2="O">
    <subfield code="p">user-scoap3-turkiye</subfield>
    <subfield code="o">oai:zenodo.org:105997</subfield>
  </datafield>
  <datafield tag="520" ind1=" " ind2=" ">
    <subfield code="a">&lt;p&gt;Using 16 energy points of ${e}^{+}{e}^{-}$ annihilation data collected in the vicinity of the $J/\psi $ resonance with the BESIII detector and with a total integrated luminosity of around $100\phantom{\rule{0.25em}{0ex}}{\text{pb}}^{-1}$, we study the relative phase between the strong and electromagnetic amplitudes of $J/\psi $ decays. The relative phase between $J/\psi $ electromagnetic decay and the continuum process (${e}^{+}{e}^{-}$ annihilation without the $J/\psi $ resonance) is confirmed to be zero by studying the cross section lineshape of ${\mu }^{+}{\mu }^{-}$ production. The relative phase between $J/\psi $ strong and electromagnetic decays is then measured to be ${\left(84.9±3.6\right)}^{\circ }$ or ${\left(-84.7±3.1\right)}^{\circ }$ for the $2\left({\pi }^{+}{\pi }^{-}\right){\pi }^{0}$ final state by investigating the interference pattern between the $J/\psi $ decay and the continuum process. This is the first measurement of the relative phase between $J/\psi $ strong and electromagnetic decays into a multihadron final state using the lineshape of the production cross section. We also study the production lineshape of the multihadron final state $\eta {\pi }^{+}{\pi }^{-}$ with $\eta \to {\pi }^{+}{\pi }^{-}{\pi }^{0}$, which provides additional information about the phase between the $J/\psi $ electromagnetic decay amplitude and the continuum process. Additionally, the branching fraction of $J/\psi \to 2\left({\pi }^{+}{\pi }^{-}\right){\pi }^{0}$ is measured to be $\left(4.73±0.44\right)\text{%}$ or $\left(4.85±0.45\right)\text{%}$, and the branching fraction of $J/\psi \to \eta {\pi }^{+}{\pi }^{-}$ is measured to be $\left(3.78±0.68\right)×{10}^{-4}$. Both of them are consistent with the world average values. The quoted uncertainties include both statistical and systematic uncertainties, which are mainly caused by the low statistics.&lt;/p&gt;</subfield>
  </datafield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">publication</subfield>
    <subfield code="b">article</subfield>
  </datafield>
  <datafield tag="540" ind1=" " ind2=" ">
    <subfield code="a">Creative Commons Attribution</subfield>
    <subfield code="u">http://www.opendefinition.org/licenses/cc-by</subfield>
  </datafield>
  <datafield tag="100" ind1=" " ind2=" ">
    <subfield code="a">CERN İşbirliği</subfield>
    <subfield code="u">CERN</subfield>
  </datafield>
  <datafield tag="856" ind1="4" ind2=" ">
    <subfield code="z">md5:0f76b39ddb357135f425dedb605196b1</subfield>
    <subfield code="s">782205</subfield>
    <subfield code="u">https://aperta.ulakbim.gov.trrecord/105997/files/j.physletb.2019.03.001.pdf</subfield>
  </datafield>
  <controlfield tag="005">20210317162301.0</controlfield>
  <datafield tag="260" ind1=" " ind2=" ">
    <subfield code="c">2019-01-01</subfield>
  </datafield>
  <datafield tag="024" ind1=" " ind2=" ">
    <subfield code="a">10.1016/j.physletb.2019.03.001</subfield>
    <subfield code="2">doi</subfield>
  </datafield>
  <datafield tag="542" ind1=" " ind2=" ">
    <subfield code="l">open</subfield>
  </datafield>
  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">Measurement of the phase between strong and electromagnetic amplitudes of / Decays</subfield>
  </datafield>
  <datafield tag="909" ind1="C" ind2="4">
    <subfield code="v">791 C</subfield>
    <subfield code="p">Physics Letters B</subfield>
  </datafield>
  <datafield tag="650" ind1="1" ind2="7">
    <subfield code="a">cc-by</subfield>
    <subfield code="2">opendefinition.org</subfield>
  </datafield>
  <controlfield tag="001">105997</controlfield>
  <datafield tag="980" ind1=" " ind2=" ">
    <subfield code="a">user-scoap3-turkiye</subfield>
  </datafield>
</record>