{"id":"https://openalex.org/W1492352257","doi":"https://doi.org/10.1103/physrevd.38.2121","title":"New searches for theC-noninvariant decay \u03c00 \u21923\u03b3 and the rare decay \u03c00 \u21924\u03b3","display_name":"New searches for theC-noninvariant decay \u03c00 \u21923\u03b3 and the rare decay \u03c00 \u21924\u03b3","publication_year":1988,"publication_date":"1988-10-01","ids":{"openalex":"https://openalex.org/W1492352257","doi":"https://doi.org/10.1103/physrevd.38.2121","mag":"1492352257","pmid":"https://pubmed.ncbi.nlm.nih.gov/9959363"},"language":"lv","primary_location":{"id":"doi:10.1103/physrevd.38.2121","doi":"https://doi.org/10.1103/physrevd.38.2121","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrevd.38.2121","pdf_url":null,"source":{"id":"https://openalex.org/S4210190737","display_name":"Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields","issn_l":"0556-2821","issn":["0556-2821","1089-4918","1538-4500","1550-2368","1550-7998"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","vabb-shw"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review D","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref","pubmed"],"open_access":{"is_oa":false,"oa_status":"closed","oa_url":null,"any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5047652105","display_name":"John E. McDonough","orcid":"https://orcid.org/0000-0003-2497-0258","observed_orcids":["https://orcid.org/0000-0003-2497-0258","https://orcid.org/0000-0001-6441-8332"]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"J. McDonough","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5035442494","display_name":"V. L. Highland","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"V. L. Highland","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5089016673","display_name":"W. K. McFarlane","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"W. K. McFarlane","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5019668141","display_name":"R. D. Bolton","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"R. D. Bolton","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5027966690","display_name":"M. D. Cooper","orcid":"https://orcid.org/0000-0002-3363-163X","observed_orcids":["https://orcid.org/0000-0002-3363-163X"]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"M. D. Cooper","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5109416825","display_name":"J. S. Frank","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"J. S. Frank","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5054791534","display_name":"A. L. Hallin","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"A. L. Hallin","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5023249253","display_name":"P. Heusi","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"P. Heusi","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5106512530","display_name":"C. M. Hoffman","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"C. M. Hoffman","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5012303075","display_name":"G. E. Hogan","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"G. E. Hogan","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5045081662","display_name":"F. G. Mariam","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"F. G. Mariam","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5068428563","display_name":"R. E. Mischke","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"R. E. Mischke","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5105460897","display_name":"L. E. Piilonen","orcid":"https://orcid.org/0000-0001-6836-0748","observed_orcids":["https://orcid.org/0000-0001-6836-0748"]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"L. E. Piilonen","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5103505896","display_name":"V. D. Sandberg","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"V. D. Sandberg","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5046992843","display_name":"Urs J. Sennhauser","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"U. Sennhauser","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5056328196","display_name":"R. Werbeck","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"R. D. Werbeck","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5042525526","display_name":"R. A. Williams","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"R. A. Williams","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5071201848","display_name":"S. L. Wilson","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"S. L. Wilson","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5056997033","display_name":"D. Grosnick","orcid":"https://orcid.org/0009-0000-3956-2666","observed_orcids":["https://orcid.org/0009-0000-3956-2666"]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"D. P. Grosnick","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5008054030","display_name":"S. Courtenay Wright","orcid":"https://orcid.org/0000-0003-2431-5624","observed_orcids":["https://orcid.org/0000-0003-2431-5624"]},"institutions":[{"id":"https://openalex.org/I84392919","display_name":"Temple University","ror":"https://ror.org/00kx1jb78","country_code":"US","type":"education","lineage":["https://openalex.org/I84392919"]}],"countries":["US"],"is_corresponding":false,"raw_author_name":"S. C. Wright","raw_affiliation_strings":["Temple University, Philadelphia, Pennsylvania 19122"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Temple University, Philadelphia, Pennsylvania 19122","institution_ids":["https://openalex.org/I84392919"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I84392919"],"apc_list":null,"apc_paid":null,"fwci":0.0,"has_fulltext":false,"cited_by_count":20,"citation_normalized_percentile":{"value":0.10159837,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":88,"max":96},"biblio":{"volume":"38","issue":"7","first_page":"2121","last_page":"2128"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T10048","display_name":"Particle physics theoretical and experimental studies","score":0.9146000146865845,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T10048","display_name":"Particle physics theoretical and experimental studies","score":0.9146000146865845,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10224","display_name":"Quantum Chromodynamics and Particle Interactions","score":0.08209999650716782,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10527","display_name":"High-Energy Particle Collisions Research","score":0.0006000000284984708,"subfield":{"id":"https://openalex.org/subfields/3106","display_name":"Nuclear and High Energy Physics"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/neutral-pion-decay","display_name":"neutral pion decay","score":0.8939999938011169},{"id":"https://openalex.org/keywords/three-photon-decay","display_name":"three-photon decay","score":0.6800000071525574},{"id":"https://openalex.org/keywords/charge-conjugation-violation","display_name":"charge conjugation violation","score":0.8009999990463257},{"id":"https://openalex.org/keywords/rare-pion-decays","display_name":"rare pion decays","score":0.718999981880188},{"id":"https://openalex.org/keywords/branching-fraction-upper-limits","display_name":"branching fraction upper limits","score":0.7979999780654907},{"id":"https://openalex.org/keywords/lampf","display_name":"LAMPF","score":0.8370000123977661}],"concepts":[{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.82175612449646},{"id":"https://openalex.org/C46460574","wikidata":"https://www.wikidata.org/wiki/Q370559","display_name":"Branching fraction","level":2,"score":0.6079720854759216},{"id":"https://openalex.org/C188082385","wikidata":"https://www.wikidata.org/wiki/Q73792","display_name":"Charge (physics)","level":2,"score":0.4998464584350586},{"id":"https://openalex.org/C109214941","wikidata":"https://www.wikidata.org/wiki/Q18334","display_name":"Particle physics","level":1,"score":0.4256707429885864},{"id":"https://openalex.org/C185544564","wikidata":"https://www.wikidata.org/wiki/Q81197","display_name":"Nuclear physics","level":1,"score":0.3651621639728546}],"mesh":[],"locations_count":2,"locations":[{"id":"doi:10.1103/physrevd.38.2121","doi":"https://doi.org/10.1103/physrevd.38.2121","is_oa":false,"landing_page_url":"https://doi.org/10.1103/physrevd.38.2121","pdf_url":null,"source":{"id":"https://openalex.org/S4210190737","display_name":"Physical review. D. Particles, fields, gravitation, and cosmology/Physical review. D. Particles and fields","issn_l":"0556-2821","issn":["0556-2821","1089-4918","1538-4500","1550-2368","1550-7998"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["anvur-scientific","cwts-core","vabb-shw"],"host_organization":"https://openalex.org/P4310320261","host_organization_name":"American Physical Society","host_organization_lineage":["https://openalex.org/P4310320261"],"host_organization_lineage_names":["American Physical Society"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical Review D","raw_type":"journal-article"},{"id":"pmid:9959363","doi":null,"is_oa":false,"landing_page_url":"https://pubmed.ncbi.nlm.nih.gov/9959363","pdf_url":null,"source":{"id":"https://openalex.org/S4306525036","display_name":"PubMed","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I1299303238","host_organization_name":"National Institutes of Health","host_organization_lineage":["https://openalex.org/I1299303238"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Physical review. D, Particles and fields","raw_type":"Journal Article"}],"best_oa_location":null,"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320306076","display_name":"National Science Foundation","ror":"https://ror.org/021nxhr62"}],"has_content":{"grobid_xml":false,"pdf":false},"content_urls":null,"referenced_works_count":36,"referenced_works":["https://openalex.org/W85484984","https://openalex.org/W1487482570","https://openalex.org/W1550052383","https://openalex.org/W1965872697","https://openalex.org/W1966965819","https://openalex.org/W1972569750","https://openalex.org/W2011917049","https://openalex.org/W2013024518","https://openalex.org/W2021591782","https://openalex.org/W2023703956","https://openalex.org/W2042958330","https://openalex.org/W2056133908","https://openalex.org/W2064835543","https://openalex.org/W2066546298","https://openalex.org/W2078141585","https://openalex.org/W2079095304","https://openalex.org/W2084522103","https://openalex.org/W2085298238","https://openalex.org/W2085912275","https://openalex.org/W2090433851","https://openalex.org/W2091854014","https://openalex.org/W2157338954","https://openalex.org/W2157895462","https://openalex.org/W2178494061","https://openalex.org/W2229720163","https://openalex.org/W2242294248","https://openalex.org/W2253837529","https://openalex.org/W2287083599","https://openalex.org/W2317863930","https://openalex.org/W2752435966","https://openalex.org/W2912789091","https://openalex.org/W3093583901","https://openalex.org/W3149902533","https://openalex.org/W3150918434","https://openalex.org/W4230049877","https://openalex.org/W4231621216"],"related_works":["https://openalex.org/W3093583901","https://openalex.org/W1487482570","https://openalex.org/W2090433851","https://openalex.org/W2044466192","https://openalex.org/W2414550758","https://openalex.org/W160141761","https://openalex.org/W2922913248","https://openalex.org/W2326773506","https://openalex.org/W3188273243","https://openalex.org/W2995340894"],"abstract_inverted_index":{"A":[0,39],"search":[1],"for":[2,50],"the":[3,11,15,51],"charge-conjugation-noninvariant":[4],"decay":[5,53],"${\\ensuremath{\\pi}}^{0}$\\ensuremath{\\rightarrow}3\\ensuremath{\\gamma}":[6],"has":[7],"been":[8],"made":[9],"using":[10],"Crystal":[12],"Box":[13],"of":[14,25,35,43],"Los":[16],"Alamos":[17],"Meson":[18],"Physics":[19],"Facility.":[20],"No":[21],"signal":[22],"in":[23,30],"excess":[24],"background":[26],"was":[27,47],"observed,":[28],"resulting":[29],"a":[31],"branching-ratio":[32],"upper":[33,41],"limit":[34,42],"3.1\\ifmmode\\times\\else\\texttimes\\fi{}${10}^{\\mathrm{\\ensuremath{-}}8}$":[36],"(90%":[37,45],"C.L.).":[38],"new":[40],"2\\ifmmode\\times\\else\\texttimes\\fi{}${10}^{\\mathrm{\\ensuremath{-}}8}$":[44],"C.L.)":[46],"also":[48],"established":[49],"allowed":[52],"${\\ensuremath{\\pi}}^{0}$\\ensuremath{\\rightarrow}4\\ensuremath{\\gamma}.":[54]},"counts_by_year":[{"year":2024,"cited_by_count":1},{"year":2023,"cited_by_count":2},{"year":2022,"cited_by_count":1},{"year":2021,"cited_by_count":2},{"year":2019,"cited_by_count":1},{"year":2018,"cited_by_count":1},{"year":2017,"cited_by_count":1},{"year":2016,"cited_by_count":2}],"updated_date":"2026-11-07T11:25:07.637180","created_date":"2016-06-24T00:00:00"}
