{"id":6113,"date":"2011-08-03T11:45:11","date_gmt":"2011-08-03T11:45:11","guid":{"rendered":"http:\/\/t2k-experiment.org\/wp-content\/uploads\/helicity.png"},"modified":"2011-08-03T11:45:11","modified_gmt":"2011-08-03T11:45:11","slug":"helicity-2","status":"inherit","type":"attachment","link":"https:\/\/t2k-experiment.org\/de\/helicity-2\/","title":{"rendered":"helicity"},"author":7,"featured_media":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"nf_dc_page":""},"class_list":["post-6113","attachment","type-attachment","status-inherit","hentry"],"description":{"rendered":"<p class=\"attachment\"><a href='https:\/\/t2k-experiment.org\/wp-content\/uploads\/helicity.png'><img decoding=\"async\" loading=\"lazy\" width=\"203\" height=\"142\" src=\"https:\/\/t2k-experiment.org\/wp-content\/uploads\/helicity.png\" class=\"attachment-medium size-medium\" alt=\"\" \/><\/a><\/p>\n<p>Definition of helicity<\/p>\n"},"caption":{"rendered":"<p>Helicity.  Particles such as the neutrino have a property called <strong>spin<\/strong>, which is a  quantum-mechanical version of what we normally mean by spin.  The spin of a particle like a neutrino or an electron can be either right-handed, as in the top picture, or left-handed, as in the lower picture.  The weak interaction selects  left-handed particles and right-handed antiparticles.  Note that an observer who was moving faster than the particle would see the particle&#8217;s velocity change direction (if you are moving rapidly left to right, the lower particle will seem to you to be moving right to left), but its spin would remain the same \u2013 therefore its observed helicity would change.<\/p>\n"},"alt_text":"","media_type":"image","mime_type":"image\/png","media_details":{"width":"203","height":"142","hwstring_small":"height='89' width='128'","file":"helicity.png","sizes":{"thumbnail":{"file":"helicity-100x100.png","width":"100","height":"100","source_url":"https:\/\/t2k-experiment.org\/wp-content\/uploads\/helicity-100x100.png"},"full":{"file":"helicity.png","width":203,"height":142,"mime_type":"image\/png","source_url":"https:\/\/t2k-experiment.org\/wp-content\/uploads\/helicity.png"}},"image_meta":{"aperture":"0","credit":"","camera":"","caption":"","created_timestamp":"0","copyright":"","focal_length":"0","iso":"0","shutter_speed":"0","title":""}},"post":null,"source_url":"https:\/\/t2k-experiment.org\/wp-content\/uploads\/helicity.png","_links":{"self":[{"href":"https:\/\/t2k-experiment.org\/de\/wp-json\/wp\/v2\/media\/6113","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/t2k-experiment.org\/de\/wp-json\/wp\/v2\/media"}],"about":[{"href":"https:\/\/t2k-experiment.org\/de\/wp-json\/wp\/v2\/types\/attachment"}],"author":[{"embeddable":true,"href":"https:\/\/t2k-experiment.org\/de\/wp-json\/wp\/v2\/users\/7"}],"replies":[{"embeddable":true,"href":"https:\/\/t2k-experiment.org\/de\/wp-json\/wp\/v2\/comments?post=6113"}]}}