{"id":3412,"date":"2025-10-10T11:40:35","date_gmt":"2025-10-10T02:40:35","guid":{"rendered":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/?post_type=seminar&#038;p=3412"},"modified":"2025-10-10T11:40:35","modified_gmt":"2025-10-10T02:40:35","slug":"large-nc-operator-analysis-of-octet-decuplet-baryon-contact-interactions-in-su3-cheft-implications-for-omega-n-and-omega-omega-scattering","status":"publish","type":"seminar","link":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/","title":{"rendered":"Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering"},"content":{"rendered":"<p>I will present a unified large-Nc operator analysis of two-baryon contact interactions that simultaneously includes the SU(3) flavor octet (J<sup>P<\/sup> = 1<sup>+<\/sup>) and decuplet (J<sup>P<\/sup> = 3<sup>+<\/sup>) sectors within chiral effective field theory (ChEFT).<br \/>\nStarting from the most general non-derivative four-baryon Lagrangians, we perform a systematic non-relativistic expansion of baryon bilinears up to next-to-leading order (NLO) in three-momentum, obtaining closed-form contact potentials for BB, BD, and DD channels through O(Q2). At this stage the theory contains 134 low-energy constants (LECs)\u201428 at leading order and 106 at NLO\u2014arising from 104 independent chiral couplings. We then impose a Hartree Hamiltonian expansion in 1\/Nc up to next-to-next-to-leading order, match spin\u2013flavor structures between the ChEFT potentials and the large-Nc operator basis, and derive a set of large-Nc sum rules.<br \/>\nThese relations reduce the number of independent LECs from 134 to 66 without sacrificing the chiral or SU(3) structure, substantially increasing predictivity across octet\u2013octet, octet\u2013decuplet, and decuplet\u2013decuplet channels.<br \/>\nI will highlight phenomenological consequences for Omega N and Omega Omega scattering as benchmarks where forthcoming lattice-QCD results can directly test the sum rules, and discuss implications for hypernuclear physics and dense-matter modeling in astrophysics. The talk will emphasize the operator-level derivation, the role of SU(3) flavor in organizing contact terms, and practical pathways to incorporate the reduced parameter sets in few-baryon calculations and global fits.<\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[154],"acf":{"s_now_accepting":true,"s_date_order":"2025-10-14 17:00:00","s_date_end":"2025-10-14 18:30:00","s_date_text":"","s_text":"Daris Samart (Khon Kaen University, Thailand)","s_place":"ES635","s_place_other":"","s_categoryother":"","s_poster":"","s_poster2":"","s_slide":""},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering - KMI - Nagoya University<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering - KMI - Nagoya University\" \/>\n<meta property=\"og:description\" content=\"I will present a unified large-Nc operator analysis of two-baryon contact interactions that simultaneously includes the SU(3) flavor octet (JP = 1+) and decuplet (JP = 3+) sectors within chiral effective field theory (ChEFT). Starting from the most general non-derivative four-baryon Lagrangians, we perform a systematic non-relativistic expansion of baryon bilinears up to next-to-leading order (NLO) in three-momentum, obtaining closed-form contact potentials for BB, BD, and DD channels through O(Q2). At this stage the theory contains 134 low-energy constants (LECs)\u201428 &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/\" \/>\n<meta property=\"og:site_name\" content=\"KMI - Nagoya University\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/\",\"url\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/\",\"name\":\"Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering - KMI - Nagoya University\",\"isPartOf\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website\"},\"datePublished\":\"2025-10-10T02:40:35+00:00\",\"dateModified\":\"2025-10-10T02:40:35+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Seminars\",\"item\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website\",\"url\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/\",\"name\":\"KMI - Nagoya University\",\"description\":\"Nagoya University: Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI)\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering - KMI - Nagoya University","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/","og_locale":"en_US","og_type":"article","og_title":"Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering - KMI - Nagoya University","og_description":"I will present a unified large-Nc operator analysis of two-baryon contact interactions that simultaneously includes the SU(3) flavor octet (JP = 1+) and decuplet (JP = 3+) sectors within chiral effective field theory (ChEFT). Starting from the most general non-derivative four-baryon Lagrangians, we perform a systematic non-relativistic expansion of baryon bilinears up to next-to-leading order (NLO) in three-momentum, obtaining closed-form contact potentials for BB, BD, and DD channels through O(Q2). At this stage the theory contains 134 low-energy constants (LECs)\u201428 &hellip;","og_url":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/","og_site_name":"KMI - Nagoya University","twitter_card":"summary_large_image","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/","url":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/","name":"Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering - KMI - Nagoya University","isPartOf":{"@id":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website"},"datePublished":"2025-10-10T02:40:35+00:00","dateModified":"2025-10-10T02:40:35+00:00","breadcrumb":{"@id":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/3412\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/"},{"@type":"ListItem","position":2,"name":"Seminars","item":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/"},{"@type":"ListItem","position":3,"name":"Large-Nc Operator Analysis of Octet-Decuplet Baryon Contact Interactions in SU(3) ChEFT: Implications for (Omega N) and (Omega Omega) Scattering"}]},{"@type":"WebSite","@id":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website","url":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/","name":"KMI - Nagoya University","description":"Nagoya University: Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI)","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/wp-json\/wp\/v2\/seminar\/3412"}],"collection":[{"href":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/wp-json\/wp\/v2\/seminar"}],"about":[{"href":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/wp-json\/wp\/v2\/types\/seminar"}],"wp:attachment":[{"href":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/wp-json\/wp\/v2\/media?parent=3412"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/wp-json\/wp\/v2\/tags?post=3412"},{"taxonomy":"seminar_category","embeddable":true,"href":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/wp-json\/wp\/v2\/seminar_category?post=3412"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}