{"id":199046,"date":"2015-08-13T13:27:03","date_gmt":"2015-08-13T16:27:03","guid":{"rendered":"http:\/\/revistapesquisa.fapesp.br\/?p=199046"},"modified":"2015-10-06T13:30:56","modified_gmt":"2015-10-06T16:30:56","slug":"pentaquark-finally-discovered","status":"publish","type":"post","link":"https:\/\/revistapesquisa.fapesp.br\/en\/pentaquark-finally-discovered\/","title":{"rendered":"Pentaquark finally discovered"},"content":{"rendered":"<div id=\"attachment_193551\" style=\"max-width: 300px\" class=\"wp-caption alignright\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-193551\" src=\"http:\/\/revistapesquisa.fapesp.br\/wp-content\/uploads\/2015\/08\/Tecnociencia_Pentaquark-300x169.jpg\" alt=\"After 50 years of searching: the pentaquark, with four quarks and an antiquark\" width=\"290\" height=\"163\" \/><p class=\"wp-caption-text\"><span class=\"media-credits-inline\">CERN<\/span>After 50 years of searching: the pentaquark, with four quarks and an antiquark<span class=\"media-credits\">CERN<\/span><\/p><\/div>\n<p>An uncommon type of particle studied by physicists for at least 50 years was unexpectedly identified by researchers at Syracuse University in the United States, members of one of the research groups of the Large Hadron Collider (LHC) in Geneva, Switzerland.\u00a0 Protons and neutrons \u2013 the building blocks of atoms, along with electrons \u2013 are made up of smaller particles called quarks.\u00a0 Each proton and neutron is composed of three quarks.\u00a0 Announced in July 2015 by the European Organization for Nuclear Research (CERN), home of the LHC, the newly discovered particle \u2013 called the pentaquark \u2013 is also a component of protons and neutrons.\u00a0 The difference is that it contains five quarks, or rather, four quarks and an antiquark, whose electrical charge is opposite to that of \u201cregular\u201d quarks.\u00a0 This was an unknown combination until now.\u00a0 Quarks are particles that move almost at the speed of light.\u00a0 Scientists had been searching for the pentaquark for at least 50 years, to no avail, making them think it might actually not exist.\u00a0 Curiously, it was found when the researchers were pursuing completely unrelated research goals.\u00a0 The study of pentaquarks, now more than just a theory, may expand existing knowledge about possible interactions between elementary particles of matter.<\/p>\n","protected":false},"excerpt":{"rendered":"Particle contains a combination of five quarks","protected":false},"author":475,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"footnotes":""},"categories":[168],"tags":[235],"coauthors":[785],"class_list":["post-199046","post","type-post","status-publish","format-standard","hentry","category-technoscience","tag-physics"],"acf":[],"_links":{"self":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/199046","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/users\/475"}],"replies":[{"embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/comments?post=199046"}],"version-history":[{"count":0,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/posts\/199046\/revisions"}],"wp:attachment":[{"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/media?parent=199046"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/categories?post=199046"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/tags?post=199046"},{"taxonomy":"author","embeddable":true,"href":"https:\/\/revistapesquisa.fapesp.br\/en\/wp-json\/wp\/v2\/coauthors?post=199046"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}