dc.contributor.author | Bernstein, Aron M. | |
dc.contributor.author | Holstein, Barry R. | |
dc.date.accessioned | 2013-05-14T16:57:39Z | |
dc.date.available | 2013-05-14T16:57:39Z | |
dc.date.issued | 2013-01 | |
dc.date.submitted | 2011-11 | |
dc.identifier.issn | 0034-6861 | |
dc.identifier.issn | 1539-0756 | |
dc.identifier.uri | http://hdl.handle.net/1721.1/78883 | |
dc.description.abstract | A fundamental property of QCD is the presence of the chiral anomaly, which is the dominant component of the π[superscript 0]→γγ decay rate. Based on this anomaly and its small (≃4.5%) chiral correction, a prediction of the π[superscript 0] lifetime can be used as a test of QCD at confinement scale energies. The interesting experimental and theoretical histories of the π[superscript 0] meson are reviewed, from discovery to the present era. Experimental results are in agreement with the theoretical prediction, within the current (≃3%) experimental error; however, they are not yet sufficiently precise to test the chiral corrected result, which is a firm QCD prediction and is known to ≃1% uncertainty. At this level there exist experimental inconsistencies, which require attention. Possible future work to improve the present precision is suggested. | en_US |
dc.description.sponsorship | United States. Dept. of Energy | en_US |
dc.language.iso | en_US | |
dc.publisher | American Physical Society | en_US |
dc.relation.isversionof | http://dx.doi.org/10.1103/RevModPhys.85.49 | en_US |
dc.rights | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. | en_US |
dc.source | APS | en_US |
dc.title | Neutral pion lifetime measurements and the QCD chiral anomaly | en_US |
dc.type | Article | en_US |
dc.identifier.citation | Bernstein, A. M., and Barry R. Holstein 2013Neutral Pion Lifetime Measurements and the QCD Chiral Anomaly. Reviews of Modern Physics 85(1): 49–77. © 2013 American Physical Society | en_US |
dc.contributor.department | Massachusetts Institute of Technology. Department of Physics | en_US |
dc.contributor.mitauthor | Bernstein, Aron M. | |
dc.relation.journal | Reviews of Modern Physics | en_US |
dc.eprint.version | Final published version | en_US |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | en_US |
eprint.status | http://purl.org/eprint/status/PeerReviewed | en_US |
dspace.orderedauthors | Bernstein, A. M.; Holstein, Barry R. | en |
dc.identifier.orcid | https://orcid.org/0000-0002-5665-3081 | |
mit.license | PUBLISHER_POLICY | en_US |
mit.metadata.status | Complete | |