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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">10.29235/1561-2430-2024-60-2-132-145</article-id><article-id custom-type="elpub" pub-id-type="custom">vestifm-780</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>Безмассовое поле со спином 2 в 50-компонентном представлении: точные решения с цилиндрической симметрией, исключение калибровочных степеней свободы</article-title><trans-title-group xml:lang="en"><trans-title>Massless spin 2 field in 50-component approach: exact solutions with cylindrical symmetry, eliminating the guage degrees of freedom</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>Ивашкевич</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivashkevich</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ивашкевич Алина Валентиновна – младший научный сотрудник</p><p>пр. Независимости, 68-2, 220072, Минск</p></bio><bio xml:lang="en"><p>Alina V. Ivashkevich – Junior Researcher</p><p>68-2, Nezavisimosti Ave., 220072, Minsk</p></bio><email xlink:type="simple">ivashkevich.alina@yandex.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>Редьков</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Red’kov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Редьков Виктор Михайлович – доктор физикоматематических наук, главный научный сотрудник</p><p>пр. Независимости, 68-2, 220072, Минск</p></bio><bio xml:lang="en"><p>Viktor M.  – Dr. Sc. (Physics and Mathematics), Chief Researcher of the Center Fundamental Interactions and Astrophysics</p><p>68-2, Nezavisimosti Ave., 220072, Minsk</p></bio><email xlink:type="simple">v.redkov@ifanbel.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>Ишханян</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Ishkhanyan</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ишханян Артур Михайлович – член-корреспондент Национальной академии наук Армении, доктор физико-математических наук, профессор</p><p>Гитаван IFI, Аштарак 0203</p></bio><bio xml:lang="en"><p>Artur M. Ishkhanyan – Corresponding Member of the National Academy of Sciences of Armenia, Dr. Sc. (Physics and Mathematics), Professor</p><p>Gitavan IPR, Ashtarak 0203</p></bio><email xlink:type="simple">aishkhanyan@gmail.com</email><xref ref-type="aff" rid="aff-2"/></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><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт физических исследований Национальной академии наук Армении</institution></aff><aff xml:lang="en"><institution>Institute for Physical Research of the National Academy of Sciences of Armenia</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>09</day><month>07</month><year>2024</year></pub-date><volume>60</volume><issue>2</issue><fpage>132</fpage><lpage>145</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ивашкевич А.В., Редьков В.М., Ишханян А.М., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Ивашкевич А.В., Редьков В.М., Ишханян А.М.</copyright-holder><copyright-holder xml:lang="en">Ivashkevich A.V., Red’kov V.M., Ishkhanyan A.M.</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/780">https://vestifm.belnauka.by/jour/article/view/780</self-uri><abstract><p>Исходим из известных результатов по 50-компонентной теории для поля со спином 2 в цилиндрических координатах, которая основана на использовании симметричного тензора 2-го ранга и тензора 3-го ранга, симметричного по двум индексам. В массивном случае эта теория описывает частицу со спином 2 с аномальным магнитным моментом. Согласно методу Федорова – Гронского, основанному на проективных операторах, все 50 функций, участвующих в описании поля спина 2 для случая свободной частицы, выражаются через 7 переменных, построенных в терминах функций Бесселя. Для 50 числовых параметров возникает однородная система линейных алгебраических уравнений. В настоящей работе найдены 6 независимых решений данных алгебраических уравнений. Были получены явные выражения для четырех калибровочных решений, определенных в соответствии с подходом Паули – Фирца. Они дают точные решения рассматриваемой системы и относятся к состояниям, которые не дают вклада в физически наблюдаемые величины, такие как тензор энергии-импульса. В итоге построено 2 класса решений, соответствующих физически наблюдаемым состояниям.</p></abstract><trans-abstract xml:lang="en"><p>We begin with some known results of the 50-component theory for a spin-2 field described in cylindrical coordinates. This theory is based on the use of a 2nd-rank symmetric tensor and a 3rd-rank tensor symmetric in two indices. In the massive case, this theory describes a spin-2 particle with an anomalous magnetic moment. According to the Fedorov – Gronskiy method, which is based on projective operators, all 50 functions involved in the description of the spin-2 field for the case of the free particle can be expressed in terms of only 7 different functions constructed from Bessel functions. This leads to a homogeneous system of linear algebraic equations for 50 numerical parameters. We have found 6 independent solutions to these equations. Additionally, we have obtained explicit expressions for 4 guage solutions defined in accordance with the Pauli – Fierz approach. These solutions are exact and correspond to non-physical states that do not affect observable quantities, such as the energy-momentum tensor. Finally, we have constructed two classes of solutions that represent physically observable states.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>безмассовое поле со спином 2</kwd><kwd>50-компонентная теория</kwd><kwd>цилиндрическая симметрия</kwd><kwd>метод Федорова – Гронского</kwd><kwd>проективные операторы</kwd><kwd>точные решения</kwd><kwd>калибровочная симметрия</kwd><kwd>исключение калибровочных степеней свободы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>spin 2 massless field</kwd><kwd>50-component theory</kwd><kwd>cylindrical symmetry</kwd><kwd>Fedorov – Gronskiy method</kwd><kwd>projective operators</kwd><kwd>exact solutions</kwd><kwd>guage symmetry</kwd><kwd>eliminating the gauge degrees of freedom</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана Научным государственным комитетом Армении (гранты № 21AG-1C064 и 21SC-BRFFR-1C021) и грантом F21ARM-22 Белорусского республиканского фонда фундаментальных исследований.</funding-statement><funding-statement xml:lang="en">This work was supported by the Armenian Science Committee (grant no. 21AG-1C064 and 21SC-BRFFR-1C021) and the Project F21ARM-22 of the National Academy of Sciences of Belarus.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Fierz M., Pauli W. On relativistic wave equations for particles of arbitrary spin in an electromagnetic field. Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1939, vol. 173, no. 953, pp. 211–232. https://doi.org/10.1098/rspa.1939.0140</mixed-citation><mixed-citation xml:lang="en">Fierz M., Pauli W. On relativistic wave equations for particles of arbitrary spin in an electromagnetic field. Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1939, vol. 173, no. 953, pp. 211–232. https://doi.org/10.1098/rspa.1939.0140</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Gel’fand I. M., Yaglom A. M. General relativistically invariant equations and infinite-dimensional representations of the Lorentz group. Zhurnal Eksperimentalnoy I Teoreticheskoy Fiziki = Journal of Experimental and Theoretical Physics, 1948, vol. 18, no. 8, pp. 703–733 (in Russian).</mixed-citation><mixed-citation xml:lang="en">Gel’fand I. M., Yaglom A. M. General relativistically invariant equations and infinite-dimensional representations of the Lorentz group. Zhurnal Eksperimentalnoy I Teoreticheskoy Fiziki = Journal of Experimental and Theoretical Physics, 1948, vol. 18, no. 8, pp. 703–733 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Fedorov F. I. To the theory of particles with spin 2. Uchenye zapiski BGU. Seriya fiziko-matematicheskaya [Scientific Notes of BSU. Physics and Mathematics series], 1951, vol. 12, pp. 156–173 (in Russian).</mixed-citation><mixed-citation xml:lang="en">Fedorov F. I. To the theory of particles with spin 2. Uchenye zapiski BGU. Seriya fiziko-matematicheskaya [Scientific Notes of BSU. Physics and Mathematics series], 1951, vol. 12, pp. 156–173 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Regge T. On the properties of spin 2 particles. Nuovo Cimento, 1957, vol. 5, no. 2, pp. 325–326. https://doi.org/10.1007/bf02855242</mixed-citation><mixed-citation xml:lang="en">Regge T. On the properties of spin 2 particles. Nuovo Cimento, 1957, vol. 5, no. 2, pp. 325–326. https://doi.org/10.1007/bf02855242</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Ivashkevich A. V., Bury A. V., Red’kov V. M., Kisel V. V. Spin 2 particle with anomalous magnetic moment in presence of uniform magnetic field, exact solutions and energy spectra. Nonlinear Dynamics and Applications, 2023, vol. 29, pp. 344–391.</mixed-citation><mixed-citation xml:lang="en">Ivashkevich A. V., Bury A. V., Red’kov V. M., Kisel V. V. Spin 2 particle with anomalous magnetic moment in presence of uniform magnetic field, exact solutions and energy spectra. Nonlinear Dynamics and Applications, 2023, vol. 29, pp. 344–391.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Gronskiy V. K., Fedorov F. I. Magnetic properties of a particle with spin 3/2. Doklady Akademii nauk BSSR [Doklady of the Academy of Sciences of BSSR], 1960, vol. 4, no. 7, pp. 278–283 (in Russian).</mixed-citation><mixed-citation xml:lang="en">Gronskiy V. K., Fedorov F. I. Magnetic properties of a particle with spin 3/2. Doklady Akademii nauk BSSR [Doklady of the Academy of Sciences of BSSR], 1960, vol. 4, no. 7, pp. 278–283 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Buryy A. V., Ivashkevich A. V., Semenyuk O. A. A spin 1 particle in a cylindric basis: the projective operator method. Vestsі Natsyianal’nai akademіі navuk Belarusі. Seryia fіzіka-matematychnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics series, 2022, vol. 58, no. 4, pp. 398–411. https://doi.org/10.29235/1561-2430-2022-58-4-398-411</mixed-citation><mixed-citation xml:lang="en">Buryy A. V., Ivashkevich A. V., Semenyuk O. A. A spin 1 particle in a cylindric basis: the projective operator method. Vestsі Natsyianal’nai akademіі navuk Belarusі. Seryia fіzіka-matematychnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Physics and Mathematics series, 2022, vol. 58, no. 4, pp. 398–411. https://doi.org/10.29235/1561-2430-2022-58-4-398-411</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
