{"id":939,"date":"2015-04-27T12:44:49","date_gmt":"2015-04-27T03:44:49","guid":{"rendered":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/939\/"},"modified":"2015-04-27T12:44:49","modified_gmt":"2015-04-27T03:44:49","slug":"20150423_soda","status":"publish","type":"seminar","link":"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/939\/","title":{"rendered":"Statistical Anisotropy in the CMB from a Two-form Field"},"content":{"rendered":"<p>We study an inflationary scenario with a two-form field to which an inflaton\u00a0<span style=\"line-height: 1.62\">couples non-trivially. We show that the two-form hair remains during\u00a0<\/span><span style=\"line-height: 1.62\">inflation. Consequently, a statistical anisotropy can be developed because\u00a0<\/span><span style=\"line-height: 1.62\">of a cumulative anisotropic interaction induced by the background two-form\u00a0<\/span><span style=\"line-height: 1.62\">field. The power spectrum of curvature perturbations has a prolate-type\u00a0<\/span><span style=\"line-height: 1.62\">anisotropy, in contrast to the vector models having an oblate-type\u00a0<\/span><span style=\"line-height: 1.62\">anisotropy. We also evaluate the bispectrum and trispectrum of curvature\u00a0<\/span><span style=\"line-height: 1.62\">perturbations by employing the in-in formalism based on the interacting\u00a0<\/span><span style=\"line-height: 1.62\">Hamiltonians. We find that the non-linear estimators fNL and \u03c4NL are\u00a0<\/span><span style=\"line-height: 1.62\">correlated with the amplitude g\u2217 of the statistical anisotropy in the power\u00a0<\/span><span style=\"line-height: 1.62\">spectrum.<\/span><\/p>\n","protected":false},"featured_media":0,"template":"","tags":[],"seminar_category":[53],"acf":{"s_now_accepting":true,"s_date_order":"2015-04-23 15:30:00","s_date_end":null,"s_date_text":"","s_text":"Jiro Soda","s_place":"KMI Science Symposia (ES635)","s_place_other":"","s_categoryother":"C-KMI Joint Seminar","s_poster":"<form mt:asset-id=\"909\" class=\"mt-enclosure mt-enclosure-file\" style=\"display: inline;\"><a href=\"\/eng\/seminar\/20150423_Soda.pdf\">20150423_Soda.pdf<\/a><\/form>","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>Statistical Anisotropy in the CMB from a Two-form Field - 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\/939\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Statistical Anisotropy in the CMB from a Two-form Field - KMI - Nagoya University\" \/>\n<meta property=\"og:description\" content=\"We study an inflationary scenario with a two-form field to which an inflaton\u00a0couples non-trivially. We show that the two-form hair remains during\u00a0inflation. Consequently, a statistical anisotropy can be developed because\u00a0of a cumulative anisotropic interaction induced by the background two-form\u00a0field. The power spectrum of curvature perturbations has a prolate-type\u00a0anisotropy, in contrast to the vector models having an oblate-type\u00a0anisotropy. We also evaluate the bispectrum and trispectrum of curvature\u00a0perturbations by employing the in-in formalism based on the interacting\u00a0Hamiltonians. We find that the non-linear &hellip;\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/939\/\" \/>\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\/939\/\",\"url\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/939\/\",\"name\":\"Statistical Anisotropy in the CMB from a Two-form Field - KMI - Nagoya University\",\"isPartOf\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/#website\"},\"datePublished\":\"2015-04-27T03:44:49+00:00\",\"dateModified\":\"2015-04-27T03:44:49+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/939\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/939\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.kmi.nagoya-u.ac.jp\/eng\/seminar\/939\/#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\":\"Statistical Anisotropy in the CMB from a Two-form Field\"}]},{\"@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":"Statistical Anisotropy in the CMB from a Two-form Field - 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\/939\/","og_locale":"en_US","og_type":"article","og_title":"Statistical Anisotropy in the CMB from a Two-form Field - KMI - Nagoya University","og_description":"We study an inflationary scenario with a two-form field to which an inflaton\u00a0couples non-trivially. We show that the two-form hair remains during\u00a0inflation. Consequently, a statistical anisotropy can be developed because\u00a0of a cumulative anisotropic interaction induced by the background two-form\u00a0field. The power spectrum of curvature perturbations has a prolate-type\u00a0anisotropy, in contrast to the vector models having an oblate-type\u00a0anisotropy. We also evaluate the bispectrum and trispectrum of curvature\u00a0perturbations by employing the in-in formalism based on the interacting\u00a0Hamiltonians. 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