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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">vestifm</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия физико-математических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-2430</issn><issn pub-type="epub">2524-2415</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-2430-2022-58-3-312-317</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-667</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ФИЗИКА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHYSICS</subject></subj-group></article-categories><title-group><article-title>Метод геометрии Лобачевского в релятивистской кинематике столкновения частиц: специальная система отсчета</article-title><trans-title-group xml:lang="en"><trans-title>The Lobachevsky geometry method in the relativistic kinematics of particle collisions: special frame of reference</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Курочкин</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kurochkin</surname><given-names>Yu. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Курочкин Юрий Андреевич – доктор физико-математических наук, заведующий центром «Фундаментальные взаимодействия и астрофизика»</p><p>пр. Независимости, 68-2, 220072, Минск</p></bio><bio xml:lang="en"><p>Yury A. Kurochkin – Dr. Sc. (Physics and Mathematics), Head of the Center for Fundamental Interactions and Astrophysics</p><p>Independence Ave., 68-2, 220072, Minsk</p></bio><email xlink:type="simple">yukuroch@dragon.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шайковская</surname><given-names>Н. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Shaikovskaya</surname><given-names>N. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шайковская Надежда Дмитриевна – аспирант,младший научный сотрудник центра «Фундаментальныевзаимодействия и астрофизика»</p><p>пр. Независимости, 68-2, 220072, Минск</p></bio><bio xml:lang="en"><p>Nadezda D. Shaikovskaya – Postgraduate Student, Junior Researcher at the Center for Fundamental Interactionsand Astrophysics</p><p>Independence Ave., 68-2, 220072, Minsk</p></bio><email xlink:type="simple">n.shaikovskaya@dragon.bas-net.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физики имени Б. И. Степанова Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>12</day><month>10</month><year>2022</year></pub-date><volume>58</volume><issue>3</issue><fpage>312</fpage><lpage>317</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Курочкин Ю.А., Шайковская Н.Д., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Курочкин Ю.А., Шайковская Н.Д.</copyright-holder><copyright-holder xml:lang="en">Kurochkin Y.A., Shaikovskaya N.D.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://vestifm.belnauka.by/jour/article/view/667">https://vestifm.belnauka.by/jour/article/view/667</self-uri><abstract><p>Продемонстрировано использование геометрии Лобачевского импульсного пространства в релятивистской кинематике столкновения частиц на примере задачи о специальной системе отсчета, дополняющей геометрический образ процесса упругого рассеяния двух частиц неравных масс. Определена скорость специальной системы отсчета относительно центра масс и угол рассеяния частиц в ней. Проанализированы условия существования такой системы отсчета. Показано, что в случае процесса с равными массами точка, соответствующая такой системе, уходит в идеальную область расширенного пространства Лобачевского за конус, а прямые, пересекающиеся в ней, становятся расходящимися прямыми в смысле геометрии Лобачевского. При этом угол между расходящимися прямыми (геодезическими линиями) геометрического образа чисто мнимый и связан с минимальной длиной отрезка, перпендикулярного расходящимся прямым (геодезическим).</p></abstract><trans-abstract xml:lang="en"><p>The use of the geometry of the Lobachevsky momentum space in the relativistic kinematics of particle collisions is demonstrated by the example of the problem of a special reference system. That system complements the geometric image of the process of elastic scattering of two particles of unequal masses. The speed of a special reference system relative to the center of mass and the angle of scattering of particles in it are determined. The conditions for the existence of such a reference system are analyzed. It is shown that in the case of a process with equal masses, the point corresponding to such a system goes into the ideal region of the extended Lobachevsky space - beyond the cone, and the lines intersecting in it become diverging lines in the sense of Lobachevsky geometry. In this case, the angle between the divergent straight lines (geodesics) of the geometric image is purely imaginary and connected to the minimum length of the segment perpendicular to the diverging straight lines (geodesics).</p></trans-abstract><kwd-group xml:lang="ru"><kwd>геометрия Лобачевского</kwd><kwd>релятивистская кинематика</kwd><kwd>система отсчета</kwd><kwd>импульсное пространство</kwd><kwd>векторы</kwd><kwd>частицы</kwd><kwd>столкновения</kwd><kwd>инвариантность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Lobachevsky geometry</kwd><kwd>relativistic kinematics</kwd><kwd>systems of reference</kwd><kwd>momentum space</kwd><kwd>vectors</kwd><kwd>particles</kwd><kwd>collisions</kwd><kwd>invariance</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Comparison of differential elastic cross sections and observation of the exchange of a colorless C-odd gluonic compound [Electronic resource] / V. 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