{"id":2910,"date":"2023-09-20T15:19:51","date_gmt":"2023-09-20T06:19:51","guid":{"rendered":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/?post_type=seminar&p=2910"},"modified":"2023-09-20T15:19:51","modified_gmt":"2023-09-20T06:19:51","slug":"spectroscopy-of-muonic-helium-hyperfine-structure-and-reporalization-of-negative-muon-at-j-parc","status":"publish","type":"seminar","link":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/2910\/","title":{"rendered":"Spectroscopy of muonic helium hyperfine structure and reporalization of negative muon at J-PARC"},"content":{"rendered":"

The muonic helium-4 atom is an atom in which one of the two electrons of the 4He atom is replaced by a negative muon. Spectroscopy of muonic helium-4 atom at high magnetic field will allow us to precisely determine negative muon magnetic moment and mass. To verify our spectroscopy apparatus and method, we performed a zero magnetic field spectroscopy and got a result with a world-leading precision of 4.5 ppm. The main limitation is statistical uncertainty, influenced by beam intensity and by muon spin depolarization during muonic helium-4 atom formation. Toward higher precision, we are planning to incorporate the SEOP technique which allows us to repolarize negative muon. I will introduce results of spectroscopy of muonic helium and negative muon reporalization test at J-PARC.<\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[58],"acf":{"s_now_accepting":true,"s_date_order":"2023-09-20 17:30:00","s_date_end":null,"s_date_text":"","s_text":"Seiso Fukumura (Phi-lab, Nagoya Univ.) ","s_place":"Online and Zoom","s_place_other":"","s_categoryother":"","s_poster":"","s_poster2":"","s_slide":""},"yoast_head":"\nSpectroscopy of muonic helium hyperfine structure and reporalization of negative muon at J-PARC - 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\/2910\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Spectroscopy of muonic helium hyperfine structure and reporalization of negative muon at J-PARC - KMI - Nagoya University\" \/>\n<meta property=\"og:description\" content=\"The muonic helium-4 atom is an atom in which one of the two electrons of the 4He atom is replaced by a negative muon. Spectroscopy of muonic helium-4 atom at high magnetic field will allow us to precisely determine negative muon magnetic moment and mass. To verify our spectroscopy apparatus and method, we performed a zero magnetic field spectroscopy and got a result with a world-leading precision of 4.5 ppm. The main limitation is statistical uncertainty, influenced by beam intensity …\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/2910\/\" \/>\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\/2910\/\",\"url\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/2910\/\",\"name\":\"Spectroscopy of muonic helium hyperfine structure and reporalization of negative muon at J-PARC - KMI - Nagoya University\",\"isPartOf\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website\"},\"datePublished\":\"2023-09-20T06:19:51+00:00\",\"dateModified\":\"2023-09-20T06:19:51+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/2910\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/2910\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/2910\/#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\":\"Spectroscopy of muonic helium hyperfine structure and reporalization of negative muon at J-PARC\"}]},{\"@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":"Spectroscopy of muonic helium hyperfine structure and reporalization of negative muon at J-PARC - 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\/2910\/","og_locale":"en_US","og_type":"article","og_title":"Spectroscopy of muonic helium hyperfine structure and reporalization of negative muon at J-PARC - KMI - Nagoya University","og_description":"The muonic helium-4 atom is an atom in which one of the two electrons of the 4He atom is replaced by a negative muon. Spectroscopy of muonic helium-4 atom at high magnetic field will allow us to precisely determine negative muon magnetic moment and mass. To verify our spectroscopy apparatus and method, we performed a zero magnetic field spectroscopy and got a result with a world-leading precision of 4.5 ppm. 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