{"id":8660,"date":"2006-04-07T18:03:17","date_gmt":"2006-04-07T16:03:17","guid":{"rendered":"https:\/\/www.jassemajaka.com\/?p=8660"},"modified":"2019-02-22T21:06:32","modified_gmt":"2019-02-22T19:06:32","slug":"evidence-for-nucleon-resonance-excitation-in-omega-meson-photoproduction","status":"publish","type":"post","link":"https:\/\/www.jassemajaka.com\/?p=8660","title":{"rendered":"Evidence for Nucleon-resonance excitation in omega-meson photoproduction"},"content":{"rendered":"<div class=\"medium-9 columns\">\n<h3 dir=\"ltr\">Evidence for Nucleon-Resonance Excitation in <span class=\"aps-inline-formula\"><span class=\"MathJax_Preview\">\u03c9<\/span><\/span>-Meson Photoproduction<\/h3>\n<\/div>\n<h4 dir=\"ltr\">J. Ajaka et al., 2006, Evidence for nucleon-resonance excitation in omega-meson photoproduction, Published in Phys. Rev. Lett. 96 (2006) 132003, DOI: 10.1103\/PhysRevLett.96.132003<\/h4>\n<h4 dir=\"ltr\">The photoproduction of the <span class=\"aps-inline-formula\"><span id=\"MathJax-Element-2-Frame\" class=\"mjx-chtml MathJax_CHTML\" tabindex=\"0\"><span id=\"MJXc-Node-4\" class=\"mjx-math\"><span id=\"MJXc-Node-5\" class=\"mjx-mrow\"><span id=\"MJXc-Node-6\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-math-I\">\u03c9<\/span><\/span><\/span><\/span><\/span><\/span> meson has been studied at GRAAL from threshold up to a photon energy of 1.5\u00a0GeV. The differential cross sections and beam asymmetries have been measured precisely at all angles. The total cross section is also obtained. Systematic enhancements of the differential cross section at large angles and nonzero beam asymmetries at intermediate angles provide clear evidence for <span class=\"aps-inline-formula\"><span id=\"MathJax-Element-3-Frame\" class=\"mjx-chtml MathJax_CHTML\" tabindex=\"0\"><span id=\"MJXc-Node-7\" class=\"mjx-math\"><span id=\"MJXc-Node-8\" class=\"mjx-mrow\"><span id=\"MJXc-Node-9\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-math-I\">s<\/span><\/span><\/span><\/span><\/span><\/span>&#8211; and <span class=\"aps-inline-formula\"><span id=\"MathJax-Element-4-Frame\" class=\"mjx-chtml MathJax_CHTML\" tabindex=\"0\"><span id=\"MJXc-Node-10\" class=\"mjx-math\"><span id=\"MJXc-Node-11\" class=\"mjx-mrow\"><span id=\"MJXc-Node-12\" class=\"mjx-mi\"><span class=\"mjx-char MJXc-TeX-math-I\">u<\/span><\/span><\/span><\/span><\/span><\/span>-channel resonant processes. The data are compared to the results of hadron and quark models.<\/h4>\n<h4 dir=\"ltr\"><a class=\"autohyperlink\" href=\"http:\/\/journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.96.132003\" target=\"_blank\" rel=\"nofollow noopener\">journals.aps.org\/prl\/abstract\/10.1103\/PhysRevLett.96.132003<\/a><\/h4>\n<p dir=\"ltr\">Download pdf: <a href=\"https:\/\/www.jassemajaka.com\/wp-content\/uploads\/2019\/02\/Evidence_for_Nucleon-Resonance_Excitation_in_o_-Me.pdf\">Evidence_for_Nucleon-Resonance_Excitation_in_o_-Me<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>The photoproduction of the \u03c9 meson has been studied at GRAAL from threshold up to a photon energy of 1.5 GeV. The differential cross sections and beam asymmetries have been measured precisely at all angles. The total cross section is also obtained. Systematic enhancements of the differential cross section at large angles and nonzero beam asymmetries at intermediate angles provide clear evidence for s- and u-channel resonant processes. The data are compared to the results of hadron and quark models.<\/p>\n","protected":false},"author":12,"featured_media":8662,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[50],"tags":[951,679,881,880,879,787,882,676],"class_list":["post-8660","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-50","tag-cross-section","tag-jassem-ajaka","tag-nucleon-resonance","tag-omega-meson","tag-particle-physics","tag-physical-review-letters","tag-quarks-model","tag-scientific-article"],"jetpack_featured_media_url":"https:\/\/www.jassemajaka.com\/wp-content\/uploads\/2019\/02\/medium-1.png","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/paTyQg-2fG","_links":{"self":[{"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=\/wp\/v2\/posts\/8660","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=8660"}],"version-history":[{"count":3,"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=\/wp\/v2\/posts\/8660\/revisions"}],"predecessor-version":[{"id":9602,"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=\/wp\/v2\/posts\/8660\/revisions\/9602"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=\/wp\/v2\/media\/8662"}],"wp:attachment":[{"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=8660"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=8660"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.jassemajaka.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=8660"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}