{"id":1020,"date":"2017-06-16T18:10:24","date_gmt":"2017-06-16T09:10:24","guid":{"rendered":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/"},"modified":"2017-06-16T18:10:24","modified_gmt":"2017-06-16T09:10:24","slug":"modified_gravity_explains_dark_matter","status":"publish","type":"seminar","link":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/","title":{"rendered":"Modified Gravity Explains Dark Matter?"},"content":{"rendered":"
The modified gravity theories have been investigated so far to explain the late-time accelerated expansion of the Universe.<\/div>\n
The modification of gravity leads to the emergence of the new degree of freedom described by the dynamical field, which plays a role of the dark energy and causes the cosmic acceleration.<\/div>\n
Besides the dark energy problem, it has been suggested that the new particle derived from the modified gravity can be a dark matter candidate.<\/div>\n
In this talk, I discuss the above scenario in the F(R) gravity.<\/div>\n
The F(R) gravity includes the extra scalar field, so-called scalaron, in addition to the graviton.<\/div>\n
Since this scalar field originates from the gravitational theory, it has very weak interactions with the standard model particles.<\/div>\n
And, the scalar field becomes heavy in the high-density region because of the chameleon mechanism.<\/div>\n
These two properties suggest that the scalar field can be the cold dark matter.<\/div>\n
I study the nature of this scalar field from the viewpoint of particle physics.<\/div>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[58],"acf":{"s_now_accepting":true,"s_date_order":"2017-06-14 17:30:00","s_date_end":null,"s_date_text":"","s_text":"Taishi Katsuragawa","s_place":"KMI Science Symposia (ES635)","s_place_other":"","s_categoryother":"","s_poster":"","s_poster2":"","s_slide":"
KMI_Topics_katsuragawa_20170614.pdf<\/a><\/form>"},"yoast_head":"\nModified Gravity Explains Dark Matter? - 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\/1020\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Modified Gravity Explains Dark Matter? - KMI - Nagoya University\" \/>\n<meta property=\"og:description\" content=\"The modified gravity theories have been investigated so far to explain the late-time accelerated expansion of the Universe. The modification of gravity leads to the emergence of the new degree of freedom described by the dynamical field, which plays a role of the dark energy and causes the cosmic acceleration. Besides the dark energy problem, it has been suggested that the new particle derived from the modified gravity can be a dark matter candidate. In this talk, I discuss the …\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/\" \/>\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\/1020\/\",\"url\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/\",\"name\":\"Modified Gravity Explains Dark Matter? - KMI - Nagoya University\",\"isPartOf\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website\"},\"datePublished\":\"2017-06-16T09:10:24+00:00\",\"dateModified\":\"2017-06-16T09:10:24+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/#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\":\"Modified Gravity Explains Dark Matter?\"}]},{\"@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":"Modified Gravity Explains Dark Matter? - 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\/1020\/","og_locale":"en_US","og_type":"article","og_title":"Modified Gravity Explains Dark Matter? - KMI - Nagoya University","og_description":"The modified gravity theories have been investigated so far to explain the late-time accelerated expansion of the Universe. The modification of gravity leads to the emergence of the new degree of freedom described by the dynamical field, which plays a role of the dark energy and causes the cosmic acceleration. Besides the dark energy problem, it has been suggested that the new particle derived from the modified gravity can be a dark matter candidate. In this talk, I discuss the …","og_url":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/","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\/1020\/","url":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/","name":"Modified Gravity Explains Dark Matter? - KMI - Nagoya University","isPartOf":{"@id":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website"},"datePublished":"2017-06-16T09:10:24+00:00","dateModified":"2017-06-16T09:10:24+00:00","breadcrumb":{"@id":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/1020\/#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":"Modified Gravity Explains Dark Matter?"}]},{"@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\/1020"}],"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=1020"}],"wp:term":[{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/wp-json\/wp\/v2\/tags?post=1020"},{"taxonomy":"seminar_category","embeddable":true,"href":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/wp-json\/wp\/v2\/seminar_category?post=1020"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}