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 <front>
  <journal-meta>
   <journal-id journal-id-type="publisher-id">Solnechno-Zemnaya Fizika</journal-id>
   <journal-title-group>
    <journal-title xml:lang="en">Solnechno-Zemnaya Fizika</journal-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Солнечно-земная физика</trans-title>
    </trans-title-group>
   </journal-title-group>
   <issn publication-format="online">2712-9640</issn>
  </journal-meta>
  <article-meta>
   <article-id pub-id-type="publisher-id">6a84bb1f94fbba14f7858059</article-id>
   <article-id pub-id-type="doi">10.12737/13514</article-id>
   <article-categories>
    <subj-group subj-group-type="toc-heading" xml:lang="ru">
     <subject>Результаты  исследований</subject>
    </subj-group>
    <subj-group subj-group-type="toc-heading" xml:lang="en">
     <subject>Results of current research</subject>
    </subj-group>
    <subj-group>
     <subject>Результаты  исследований</subject>
    </subj-group>
   </article-categories>
   <title-group>
    <article-title xml:lang="en">Behaviour of the high-energy neutrino flux in the Earth’s atmosphere</article-title>
    <trans-title-group xml:lang="ru">
     <trans-title>Характеристики потока нейтрино высоких  энергий  в атмосфере Земли</trans-title>
    </trans-title-group>
   </title-group>
   <contrib-group content-type="authors">
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Кочанов</surname>
       <given-names>Алексей Александрович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Kochanov</surname>
       <given-names>Aleksey Aleksandrovich</given-names>
      </name>
     </name-alternatives>
     <email>kochanov@iszf.irk.ru</email>
     <bio xml:lang="ru">
      <p>кандидат физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-1"/>
     <xref ref-type="aff" rid="aff-2"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Морозова</surname>
       <given-names>Анна Дмитриевна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Morozova</surname>
       <given-names>Anna Dmitrievna</given-names>
      </name>
     </name-alternatives>
     <email>refriz@yandex.ru</email>
     <xref ref-type="aff" rid="aff-3"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Синеговская</surname>
       <given-names>Татьяна Сергеевна</given-names>
      </name>
      <name xml:lang="en">
       <surname>Sinegovskaya</surname>
       <given-names>Tatyana Sergeevna</given-names>
      </name>
     </name-alternatives>
     <email>tanya@api.isu.ru</email>
     <bio xml:lang="ru">
      <p>кандидат физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>candidate of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-4"/>
    </contrib>
    <contrib contrib-type="author">
     <name-alternatives>
      <name xml:lang="ru">
       <surname>Синеговский</surname>
       <given-names>Сергей Иванович</given-names>
      </name>
      <name xml:lang="en">
       <surname>Sinegovskiy</surname>
       <given-names>Sergey Ivanovich</given-names>
      </name>
     </name-alternatives>
     <email>sinegovsky@api.isu.ru</email>
     <bio xml:lang="ru">
      <p>доктор физико-математических наук;</p>
     </bio>
     <bio xml:lang="en">
      <p>doctor of physical and mathematical sciences;</p>
     </bio>
     <xref ref-type="aff" rid="aff-5"/>
    </contrib>
   </contrib-group>
   <aff-alternatives id="aff-1">
    <aff>
     <institution xml:lang="ru">Институт солнечно-земной физики СО РАН</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Institute of Solar Terrestrial Physics SB RAS</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-2">
    <aff>
     <institution xml:lang="ru">Иркутский государственный университет</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk State University</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-3">
    <aff>
     <institution xml:lang="ru">Иркутский государственный университет</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk State University</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-4">
    <aff>
     <institution xml:lang="ru">Иркутский государственный университет путей сообщения</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk State Transport University</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <aff-alternatives id="aff-5">
    <aff>
     <institution xml:lang="ru">Иркутский государственный университет</institution>
     <city>Иркутск</city>
     <country>Россия</country>
    </aff>
    <aff>
     <institution xml:lang="en">Irkutsk State University</institution>
     <city>Irkutsk</city>
     <country>Russian Federation</country>
    </aff>
   </aff-alternatives>
   <pub-date publication-format="print" date-type="pub" iso-8601-date="2015-12-17T00:00:00+03:00">
    <day>17</day>
    <month>12</month>
    <year>2015</year>
   </pub-date>
   <pub-date publication-format="electronic" date-type="pub" iso-8601-date="2015-12-17T00:00:00+03:00">
    <day>17</day>
    <month>12</month>
    <year>2015</year>
   </pub-date>
   <fpage>3</fpage>
   <lpage>10</lpage>
   <permissions>
    <copyright-statement xml:lang="ru">© 2015 Кочанов А.А., Морозова А.Д., Синеговская Т.С., Синеговский С.И.</copyright-statement>
    <copyright-statement xml:lang="en">© 2015 Kochanov A.A., Morozova A.D., Sinegovskaya T.S., Sinegovskiy S.I.</copyright-statement>
    <copyright-year>2015</copyright-year>
    <copyright-holder xml:lang="ru">Кочанов Алексей Александрович, Морозова Анна Дмитриевна, Синеговская Татьяна Сергеевна, Синеговский Сергей Иванович</copyright-holder>
    <copyright-holder xml:lang="en">Kochanov Aleksey Aleksandrovich, Morozova Anna Dmitrievna, Sinegovskaya Tatyana Sergeevna, Sinegovskiy Sergey Ivanovich</copyright-holder>
   </permissions>
   <self-uri xlink:href="https://zh-szf.ru/en/nauka/publications/6a84bb1f94fbba14f7858059/view">https://zh-szf.ru/en/nauka/publications/6a84bb1f94fbba14f7858059/view</self-uri>
   <abstract xml:lang="ru">
    <p>При обработке данных, полученных в эксперименте IceCube за 988 дней (2010-2013 гг.), обнаружены 37 высокоэнергетических нейтринных событий с энерговыделением от 30 ТэВ до 2 ПэВ. Гипотеза об астрофизическом происхождении этих нейтрино подтверждается на уровне статистической достоверности 5.7 стандартных отклонений. Для надежной идентификации нейтринных событий необходим тщательный расчет фона атмосферных нейтрино. В работе выполнен расчет спектров атмосферных нейтрино в интервале энергий 100 ГэВ – 10 ПэВ для ряда моделей адрон-ядерных взаимодействий с использованием нескольких параметризаций спектра космических лучей, опирающихся на экспериментальные данные и учитывающих излом спектра.  Показано, что редкие распады короткоживущего нейтрального каона K0_s при энергиях выше 100 ТэВ дают более трети полного потока электронных нейтрино, а учет реакции рождения К-мезонов в пион-ядерных соударениях приводит к возрастанию потока электронных нейтрино еще на  5-7 % в интервале энергий 10^2 -10^4 ГэВ.  Расчетные спектры в целом согласуются с данными измерений. Извлеченное из данных IceCube флейворное отношение потоков нейтрино дает указание на то, что измеренный спектр атмосферных электронных нейтрино содержит примесь диффузного потока астрофизических нейтрино при энергиях 20-50 ТэВ.</p>
   </abstract>
   <trans-abstract xml:lang="en">
    <p>The processing of the IceCube experiment data, obtained during 988 days (2010-2013), revealed 37 high-energy neutrino-induced events with deposited energies 30 TeV - 2 PeV. The hypothesis of an astrophysical origin of these neutrinos is confirmed at the statistical confidence level of 5.7 standard deviations. To identify reliably the neutrino events, a thorough calculation of the atmospheric neutrino background is required. In this work we calculate the atmospheric neutrino spectra in the energy range 100 GeV - 10 PeV with usage of several hadronic models and a few parametrizations of the cosmic ray spectra, supported by experimental data, which take into account the knee. It is shown that rare decays of short-lived neutral каоns K0_s contribute more than a third of the total electron neutrino flux at the energies above 100 ТeV. The account for kaons production in pion-nucleus collisions increases the electron neutrino flux by 5-7 % in the energy range 10^2 -10^4  GeV. Calculated neutrino spectra agree on the whole with the measurement data. The neutrino flavor ratio, extracted from the IceCube data, possibly indicates that the conventional atmospheric electron neutrino flux obtained in the IceCube experiment contains an admixture of the astrophysical neutrinos in the range 20 − 50 TeV.</p>
   </trans-abstract>
   <kwd-group xml:lang="ru">
    <kwd>нейтрино</kwd>
    <kwd>высокие энергии</kwd>
    <kwd>космические лучи</kwd>
   </kwd-group>
   <kwd-group xml:lang="en">
    <kwd>neutrino</kwd>
    <kwd>high energy</kwd>
    <kwd>cosmic rays</kwd>
   </kwd-group>
  </article-meta>
 </front>
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