A hybrid model of Skyrme- and Brueckner-type interactions for neutron star matter
Abstract We suggest a hybrid model for neutron star matter to discuss the hyperon puzzle inherent in the 2.0 M$_{\odot}$ of the neutron star. For the nucleon–nucleon ($NN$) interaction, we employ the Skyrme–Hartree–Fock approach based on various Skyrme interaction parameter sets, and take the Brueck...
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Veröffentlicht in: | Progress of Theoretical and Experimental Physics 2020-01, Vol.2020 (1), p.1 |
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creator | Choi, Soonchul Cheoun, Myung-Ki Kim, K S Kim, Hungchong Sagawa, H |
description | Abstract
We suggest a hybrid model for neutron star matter to discuss the hyperon puzzle inherent in the 2.0 M$_{\odot}$ of the neutron star. For the nucleon–nucleon ($NN$) interaction, we employ the Skyrme–Hartree–Fock approach based on various Skyrme interaction parameter sets, and take the Brueckner–Hartree–Fock approach for the interactions related to hyperons. For the many-body interactions including hyperons, we make use of the multi-pomeron-exchange model, whose parameters have been adjusted to the data deduced from various hypernuclei properties. For clear understanding of the physics in the hybrid model, we discuss fractional functions of related particles, symmetry energies, and chemical potentials in dense matter. Finally, we investigate the equations of state and mass–radius relation of neutron stars, and show that the hybrid model can properly describe the 2.0 M$_{\odot}$ neutron star mass data with the many-body interaction employed in the hybrid model. Recent tidal deformability data from the gravitational wave observation are also compared to our calculations, especially in terms of the neutron skin of $^{208}$Pb and nuclear incompressibility. |
doi_str_mv | 10.1093/ptep/ptz139 |
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We suggest a hybrid model for neutron star matter to discuss the hyperon puzzle inherent in the 2.0 M$_{\odot}$ of the neutron star. For the nucleon–nucleon ($NN$) interaction, we employ the Skyrme–Hartree–Fock approach based on various Skyrme interaction parameter sets, and take the Brueckner–Hartree–Fock approach for the interactions related to hyperons. For the many-body interactions including hyperons, we make use of the multi-pomeron-exchange model, whose parameters have been adjusted to the data deduced from various hypernuclei properties. For clear understanding of the physics in the hybrid model, we discuss fractional functions of related particles, symmetry energies, and chemical potentials in dense matter. Finally, we investigate the equations of state and mass–radius relation of neutron stars, and show that the hybrid model can properly describe the 2.0 M$_{\odot}$ neutron star mass data with the many-body interaction employed in the hybrid model. Recent tidal deformability data from the gravitational wave observation are also compared to our calculations, especially in terms of the neutron skin of $^{208}$Pb and nuclear incompressibility.</description><identifier>ISSN: 2050-3911</identifier><identifier>EISSN: 2050-3911</identifier><identifier>DOI: 10.1093/ptep/ptz139</identifier><language>eng</language><publisher>Oxford University Press</publisher><ispartof>Progress of Theoretical and Experimental Physics, 2020-01, Vol.2020 (1), p.1</ispartof><rights>The Author(s) 2020. Published by Oxford University Press on behalf of the Physical Society of Japan. 2020</rights><rights>COPYRIGHT 2020 Oxford University Press</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c429t-40cc38c0e57274ffdf55130c69e77ecbbf1d98d5fae196e2bc0a33a4786bdd7e3</citedby><cites>FETCH-LOGICAL-c429t-40cc38c0e57274ffdf55130c69e77ecbbf1d98d5fae196e2bc0a33a4786bdd7e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,861,1599,27905,27906</link.rule.ids></links><search><creatorcontrib>Choi, Soonchul</creatorcontrib><creatorcontrib>Cheoun, Myung-Ki</creatorcontrib><creatorcontrib>Kim, K S</creatorcontrib><creatorcontrib>Kim, Hungchong</creatorcontrib><creatorcontrib>Sagawa, H</creatorcontrib><title>A hybrid model of Skyrme- and Brueckner-type interactions for neutron star matter</title><title>Progress of Theoretical and Experimental Physics</title><description>Abstract
We suggest a hybrid model for neutron star matter to discuss the hyperon puzzle inherent in the 2.0 M$_{\odot}$ of the neutron star. For the nucleon–nucleon ($NN$) interaction, we employ the Skyrme–Hartree–Fock approach based on various Skyrme interaction parameter sets, and take the Brueckner–Hartree–Fock approach for the interactions related to hyperons. For the many-body interactions including hyperons, we make use of the multi-pomeron-exchange model, whose parameters have been adjusted to the data deduced from various hypernuclei properties. For clear understanding of the physics in the hybrid model, we discuss fractional functions of related particles, symmetry energies, and chemical potentials in dense matter. Finally, we investigate the equations of state and mass–radius relation of neutron stars, and show that the hybrid model can properly describe the 2.0 M$_{\odot}$ neutron star mass data with the many-body interaction employed in the hybrid model. Recent tidal deformability data from the gravitational wave observation are also compared to our calculations, especially in terms of the neutron skin of $^{208}$Pb and nuclear incompressibility.</description><issn>2050-3911</issn><issn>2050-3911</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>TOX</sourceid><recordid>eNp9kE1LxDAQhoMouKx78g_k5EW6Jk3bNMd18QsWRNRzSZOJ1m2TkmQP9debpR48ycDMMPO-w_AgdEnJmhLBbsYIY0rflIkTtMhJSTImKD3905-jVQhfhBBKOCcFXaCXDf6cWt9pPDgNPXYGv-4nP0CGpdX41h9A7S34LE4j4M5G8FLFztmAjfPYwiF6Z3GI0uNBxrS-QGdG9gFWv3WJ3u_v3raP2e754Wm72WWqyEXMCqIUqxWBkue8MEabsqSMqEoA56Da1lAtal0aCVRUkLeKSMZkweuq1ZoDW6L1fPdD9tB01riYXkuhYeiUs2C6NN9UdU1zyphIhuvZoLwLwYNpRt8N0k8NJc2RYHMk2MwEk_pqVrvD-K_wB1mHc6k</recordid><startdate>20200101</startdate><enddate>20200101</enddate><creator>Choi, Soonchul</creator><creator>Cheoun, Myung-Ki</creator><creator>Kim, K S</creator><creator>Kim, Hungchong</creator><creator>Sagawa, H</creator><general>Oxford University Press</general><scope>TOX</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>IAO</scope></search><sort><creationdate>20200101</creationdate><title>A hybrid model of Skyrme- and Brueckner-type interactions for neutron star matter</title><author>Choi, Soonchul ; Cheoun, Myung-Ki ; Kim, K S ; Kim, Hungchong ; Sagawa, H</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c429t-40cc38c0e57274ffdf55130c69e77ecbbf1d98d5fae196e2bc0a33a4786bdd7e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2020</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Choi, Soonchul</creatorcontrib><creatorcontrib>Cheoun, Myung-Ki</creatorcontrib><creatorcontrib>Kim, K S</creatorcontrib><creatorcontrib>Kim, Hungchong</creatorcontrib><creatorcontrib>Sagawa, H</creatorcontrib><collection>Oxford Journals Open Access Collection</collection><collection>CrossRef</collection><collection>Gale Academic OneFile</collection><jtitle>Progress of Theoretical and Experimental Physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Choi, Soonchul</au><au>Cheoun, Myung-Ki</au><au>Kim, K S</au><au>Kim, Hungchong</au><au>Sagawa, H</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A hybrid model of Skyrme- and Brueckner-type interactions for neutron star matter</atitle><jtitle>Progress of Theoretical and Experimental Physics</jtitle><date>2020-01-01</date><risdate>2020</risdate><volume>2020</volume><issue>1</issue><spage>1</spage><pages>1-</pages><issn>2050-3911</issn><eissn>2050-3911</eissn><abstract>Abstract
We suggest a hybrid model for neutron star matter to discuss the hyperon puzzle inherent in the 2.0 M$_{\odot}$ of the neutron star. For the nucleon–nucleon ($NN$) interaction, we employ the Skyrme–Hartree–Fock approach based on various Skyrme interaction parameter sets, and take the Brueckner–Hartree–Fock approach for the interactions related to hyperons. For the many-body interactions including hyperons, we make use of the multi-pomeron-exchange model, whose parameters have been adjusted to the data deduced from various hypernuclei properties. For clear understanding of the physics in the hybrid model, we discuss fractional functions of related particles, symmetry energies, and chemical potentials in dense matter. Finally, we investigate the equations of state and mass–radius relation of neutron stars, and show that the hybrid model can properly describe the 2.0 M$_{\odot}$ neutron star mass data with the many-body interaction employed in the hybrid model. Recent tidal deformability data from the gravitational wave observation are also compared to our calculations, especially in terms of the neutron skin of $^{208}$Pb and nuclear incompressibility.</abstract><pub>Oxford University Press</pub><doi>10.1093/ptep/ptz139</doi><oa>free_for_read</oa></addata></record> |
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title | A hybrid model of Skyrme- and Brueckner-type interactions for neutron star matter |
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