{"id":216,"date":"2017-01-19T09:22:55","date_gmt":"2017-01-19T07:22:55","guid":{"rendered":"http:\/\/magneticmoments.info\/wp\/?p=216"},"modified":"2017-01-19T09:22:55","modified_gmt":"2017-01-19T07:22:55","slug":"paper-sixfold-improved-single-particle-measurement-of-the-magnetic-moment-of-the-antiproton","status":"publish","type":"post","link":"https:\/\/magneticmoments.info\/wp\/?p=216","title":{"rendered":"[paper] Sixfold improved single particle measurement of the magnetic moment of the antiproton"},"content":{"rendered":"<p><em>Sixfold improved single particle measurement of the magnetic moment of the antiproton<\/em><\/p>\n<p>H. Nagahama et al.<\/p>\n<p>doi: <a href=\"https:\/\/doi.org\/10.1038\/ncomms14084\">10.1038\/ncomms14084<\/a><\/p>\n<p>Our current understanding of the Universe comes, among others, from particle physics and cosmology. In particle physics an almost perfect symmetry between matter and antimatter exists. On cosmological scales, however, a striking matter\/antimatter imbalance is observed. This contradiction inspires comparisons of the fundamental properties of particles and antiparticles with high precision. Here we report on a measurement of the g-factor of the antiproton with a fractional precision of 0.8 parts per million at 95% confidence level. Our value g(antiproton)=2=2.7928465(23) outperforms the previous best measurement by a factor of 6. The result is consistent with our proton g-factor measurement g(proton)=2=2.792847350(9), and therefore agrees with the fundamental charge, parity, time (CPT) invariance of the Standard Model of particle physics. Additionally, our result improves coefficients of the standard model extension which discusses the sensitivity of experiments with respect to CPT violation by up to a factor of 20.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Sixfold improved single particle measurement of the magnetic moment of the antiproton H. Nagahama et al. doi: 10.1038\/ncomms14084 Our current understanding of the Universe comes, among others, from particle physics and cosmology. In particle physics an almost perfect symmetry between&#46;&#46;&#46;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"jetpack_publicize_message":"","jetpack_is_tweetstorm":false,"jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","enabled":false}}},"categories":[3,1],"tags":[149,191,8,269],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p6YIb0-3u","jetpack-related-posts":[{"id":105,"url":"https:\/\/magneticmoments.info\/wp\/?p=105","url_meta":{"origin":216,"position":0},"title":"[paper] Direct Measurement of the Proton Magnetic Moment","date":"Apr 10, 2012","format":false,"excerpt":"Direct Measurement of the Proton Magnetic Moment J. DiSciacca and G. Gabrielse doi: 10.1103\/PhysRevLett.108.153001 The proton magnetic moment in nuclear magnetons is measured to be \u03bcp\/\u03bcN\u2261g\/2=2.792\u2009846\u00b10.000\u2009007, a 2.5 parts per million uncertainty. The direct determination, using a single proton in a Penning trap, demonstrates the first method that should work\u2026","rel":"","context":"In &quot;g factor&quot;","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":134,"url":"https:\/\/magneticmoments.info\/wp\/?p=134","url_meta":{"origin":216,"position":1},"title":"[paper] Demonstration of the double Penning Trap technique with a single proton","date":"Jun 4, 2013","format":false,"excerpt":"Demonstration of the double Penning Trap technique with a single proton A. Mooser et al. doi: 10.1016\/j.physletb.2013.05.012 Spin flips of a single proton were driven in a Penning trap with a homogeneous magnetic field. For the spin-state analysis the proton was transported into a second Penning trap with a superimposed\u2026","rel":"","context":"In &quot;experiment&quot;","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":347,"url":"https:\/\/magneticmoments.info\/wp\/?p=347","url_meta":{"origin":216,"position":2},"title":"[paper] Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of 75Cu","date":"Jan 22, 2019","format":false,"excerpt":"Interplay between nuclear shell evolution and shape deformation revealed by the magnetic moment of 75Cu Y. Ishikawa et al. Nature Physics (2019) DOI: 10.1038\/s41567-018-0410-7 Exotic nuclei are characterized by having a number of neutrons (or protons) in excess relative to stable nuclei. Their shell structure, which represents single-particle motion in\u2026","rel":"","context":"In &quot;g factor&quot;","img":{"alt_text":"","src":"https:\/\/i0.wp.com\/magneticmoments.info\/wp\/wp-content\/uploads\/2019\/01\/cu75.png?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":115,"url":"https:\/\/magneticmoments.info\/wp\/?p=115","url_meta":{"origin":216,"position":3},"title":"[paper] Structure of the Sr-Zr isotopes near and at the magic N=50 shell from g-factor and lifetime measurements in8840Zr and 84,86,8838Sr","date":"Apr 30, 2012","format":false,"excerpt":"Structure of the Sr-Zr isotopes near and at the magic N=50 shell from g-factor and lifetime measurements in8840Zr and 84,86,8838Sr G. Kumbartzki et al. doi: 10.1103\/PhysRevC.85.044322 Background: The evolution of and interplay between single-particle and collective excitations in the 40 \u2a7dN\u2a7d 50 range for 38Sr and 40Zr isotopes have been\u2026","rel":"","context":"In &quot;experiment&quot;","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":95,"url":"https:\/\/magneticmoments.info\/wp\/?p=95","url_meta":{"origin":216,"position":4},"title":"[paper] First g-factor measurements of the 21+ and the 41+ states of radioactive 100Pd","date":"Oct 25, 2011","format":false,"excerpt":"First g-factor measurements of the 21+ and the 41+ states of radioactive 100Pd D.A. Torres et al. doi: 10.1103\/PhysRevC.84.044327 The g factors of the first 2+ and 4+ states of the radioactive 100Pd nucleus have been investigated for the first time, using an \u03b1-particle transfer reaction from 12C to 96Ru.\u2026","rel":"","context":"In &quot;g factor&quot;","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]},{"id":303,"url":"https:\/\/magneticmoments.info\/wp\/?p=303","url_meta":{"origin":216,"position":5},"title":"Probing Sizes and Shapes of Nobelium Isotopes by Laser Spectroscopy","date":"Jun 10, 2018","format":false,"excerpt":"Until recently, ground-state nuclear moments of the heaviest nuclei could only be inferred from nuclear spectroscopy, where model assumptions are required. Laser spectroscopy in combination with modern atomic structure calculations is now able to probe these moments directly, in a comprehensive and nuclear-model-independent way. Here we report on unique access\u2026","rel":"","context":"In &quot;g factor&quot;","img":{"alt_text":"","src":"","width":0,"height":0},"classes":[]}],"_links":{"self":[{"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/posts\/216"}],"collection":[{"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=216"}],"version-history":[{"count":1,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/posts\/216\/revisions"}],"predecessor-version":[{"id":217,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=\/wp\/v2\/posts\/216\/revisions\/217"}],"wp:attachment":[{"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=216"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=216"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/magneticmoments.info\/wp\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=216"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}