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<article article-type="research-article" dtd-version="1.3" xml:lang="ru">
  <front xmlns:xlink="http://www.w3.org/1999/xlink">
    <journal-meta>
      <journal-title-group>
        <journal-title>St. Petersburg Polytechnic University Journal: Physics and Mathematics</journal-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Научно-технические ведомости СПбГПУ. Физико-математические науки</trans-title>
        </trans-title-group>
      </journal-title-group>
      <issn pub-type="epub">2304-9782, 2618-8686, 2405-7223</issn>
    </journal-meta>
    <article-meta xmlns:xlink="http://www.w3.org/1999/xlink">
      <article-id pub-id-type="publisher-id">10</article-id>
      <article-id pub-id-type="doi">10.5862/JPM.218.10</article-id>
      <title-group>
        <article-title>Phi-meson nuclear modification factors at the lead nuclei collisions in the ALICE experiment at the LHC</article-title>
        <trans-title-group xml:lang="ru">
          <trans-title>Факторы ядерной модификации φ-мезонов при столкновениях ядер свинца в эксперименте ALICE на Большом адронном коллайдере</trans-title>
        </trans-title-group>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0009-0001-9974-0169</contrib-id>
          <name>
            <surname>Malaev</surname>
            <given-names>Mikhail</given-names>
          </name>
          <xref ref-type="aff" rid="aff1"/>
          <email>mmalayev@gmail.com</email>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Ryabov</surname>
            <given-names>Victor</given-names>
          </name>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Ryabov</surname>
            <given-names>Yuri</given-names>
          </name>
        </contrib>
        <contrib contrib-type="author">
          <contrib-id contrib-id-type="orcid">0000-0003-0309-5917</contrib-id>
          <name>
            <surname>Berdnikov</surname>
            <given-names>Yaroslav</given-names>
          </name>
          <xref ref-type="aff" rid="aff1"/>
          <email>berdnikov@spbstu.ru</email>
        </contrib>
        <contrib contrib-type="author">
          <name>
            <surname>Samsonov</surname>
            <given-names>Vladimir</given-names>
          </name>
        </contrib>
      </contrib-group>
      <aff id="aff1">Peter the Great St. Petersburg Polytechnic University</aff>
      <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2015-06-10">
        <day>10</day>
        <month>06</month>
        <year>2015</year>
      </pub-date>
      <issue>2</issue>
      <issue-id pub-id-type="publisher-id">218</issue-id>
      <fpage>99</fpage>
      <lpage>109</lpage>
      <self-uri xmlns:xlink="http://www.w3.org/1999/xlink" content-type="pdf" xlink:href="https://physmath.spbstu.ru/userfiles/files/articles/2015/2/10_99_109_2_218_2015.pdf"/>
      <abstract xml:lang="en">
        <p>Hadron spectra measurements in proton-proton and nucleus-nucleus collisions at the LHC provide the means to study the mechanisms of particle production and properties of the medium formed in relativistic heavy ion collisions. Phi-meson is a very rich probe since it is sensitive to several aspects of the collision such as strangeness enhancement, chiral symmetry restoration and parton energy loss. Due to its small inelastic cross-section, phi-meson is not strongly affected by the late hadronic rescattering and is sensitive to the initial evolution of the system. With a mass similar to that of the proton, it is interesting to see how the phi-meson fits within the meson/baryon pattern of observables. Being a pure ss state, it further constrains the energy loss and recombination pictures. This article presents recent results on phi-meson invariant yields and nuclear modification factors measured in a wide range of transverse momentum up to 21 GeV/c2 in (p + p) and (Pb + Pb) collisions at different centralities. The proton-to-(phi-meson) yield (p/phi) ratio as a function of transverse momentum in (Pb + Pb) collisions at an energy of SNN = 2.76 TeV is also presented.</p>
      </abstract>
      <kwd-group xml:lang="en">
        <kwd>nuclear modification factor</kwd>
        <kwd>quark-gluon plazma</kwd>
        <kwd>meson</kwd>
        <kwd>heavy nucleous</kwd>
        <kwd>proton</kwd>
        <kwd>alice</kwd>
        <kwd>LHC</kwd>
      </kwd-group>
    </article-meta>
  </front>
</article>
