Measurement of the Λ hyperon lifetime
dc.contributor.author | ALICE Collaboration | |
dc.date.accessioned | 2023-09-07T09:26:06Z | |
dc.date.available | 2023-09-07T09:26:06Z | |
dc.date.issued | 2023 | |
dc.identifier.citation | ALICE Collaboration. (2023). Measurement of the Λ hyperon lifetime. <i>Physical Review D</i>, <i>108</i>, Article 032009. <a href="https://doi.org/10.1103/PhysRevD.108.032009" target="_blank">https://doi.org/10.1103/PhysRevD.108.032009</a> | |
dc.identifier.other | CONVID_184710251 | |
dc.identifier.uri | https://jyx.jyu.fi/handle/123456789/88965 | |
dc.description.abstract | A new, more precise measurement of the Λ hyperon lifetime is performed using a large data sample of Pb–Pb collisions at √sNN =5.02 TeV with ALICE. The Λ and ¯Λ hyperons are reconstructed at midrapidity using their two-body weak decay channel Λ→p+π− and ¯Λ→¯p+π+. The measured value of the Λ lifetime is τΛ=[261.07±0.37(stat.)±0.72(syst.)] ps. The relative difference between the lifetime of Λ and ¯Λ, which represents an important test of CPT invariance in the strangeness sector, is also measured. The obtained value (τΛ−τ¯Λ)/τΛ=0.0013±0.0028(stat.)±0.0021(syst.) is consistent with zero within the uncertainties. Both measurements of the Λ hyperon lifetime and of the relative difference between τΛ and τ¯Λ are in agreement with the corresponding world averages of the Particle Data Group and about a factor of three more precise. | en |
dc.format.mimetype | application/pdf | |
dc.language.iso | eng | |
dc.publisher | American Physical Society (APS) | |
dc.relation.ispartofseries | Physical Review D | |
dc.rights | CC BY 4.0 | |
dc.title | Measurement of the Λ hyperon lifetime | |
dc.type | article | |
dc.identifier.urn | URN:NBN:fi:jyu-202309074998 | |
dc.contributor.laitos | Fysiikan laitos | fi |
dc.contributor.laitos | Department of Physics | en |
dc.type.uri | http://purl.org/eprint/type/JournalArticle | |
dc.type.coar | http://purl.org/coar/resource_type/c_2df8fbb1 | |
dc.description.reviewstatus | peerReviewed | |
dc.relation.issn | 2470-0010 | |
dc.relation.volume | 108 | |
dc.type.version | publishedVersion | |
dc.rights.copyright | © 2023 CERN, for the ALICE Collaboration | |
dc.rights.accesslevel | openAccess | fi |
dc.relation.grantnumber | 346327 | |
dc.relation.grantnumber | 346328 | |
dc.relation.grantnumber | 824093 | |
dc.relation.grantnumber | 824093 | |
dc.relation.projectid | info:eu-repo/grantAgreement/EC/H2020/824093/EU//STRONG-2020 | |
dc.subject.yso | hiukkasfysiikka | |
dc.format.content | fulltext | |
jyx.subject.uri | http://www.yso.fi/onto/yso/p15576 | |
dc.rights.url | https://creativecommons.org/licenses/by/4.0/ | |
dc.relation.doi | 10.1103/PhysRevD.108.032009 | |
dc.relation.funder | Research Council of Finland | en |
dc.relation.funder | Research Council of Finland | en |
dc.relation.funder | European Commission | en |
dc.relation.funder | Suomen Akatemia | fi |
dc.relation.funder | Suomen Akatemia | fi |
dc.relation.funder | Euroopan komissio | fi |
jyx.fundingprogram | Centre of Excellence, AoF | en |
jyx.fundingprogram | Centre of Excellence, AoF | en |
jyx.fundingprogram | RIA Research and Innovation Action, H2020 | en |
jyx.fundingprogram | Huippuyksikkörahoitus, SA | fi |
jyx.fundingprogram | Huippuyksikkörahoitus, SA | fi |
jyx.fundingprogram | RIA Research and Innovation Action, H2020 | fi |
dc.type.okm | A1 |