Evidence for the Cusp Effect in ?0 Decays into ??0?0

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dc.authoridLiu, Haibo/0000-0002-4213-2883
dc.authoridChen, Qi/0000-0002-6568-7267
dc.authoridYang, Lili/0009-0008-2926-484X
dc.authoridLiu, Liang/0000-0002-6753-925X
dc.authoridLi, Xiaoyu/0000-0002-6791-5403
dc.authoridCalligaris, Luigi/0000-0002-9951-9448
dc.authoridLavezzi, Lia/0000-0002-4928-8151
dc.authorwosidYan, Xin/KGL-5903-2024
dc.authorwosidYan, Jing/JFA-6705-2023
dc.authorwosidsong, yu/KCZ-2003-2024
dc.authorwosidZhu, Li/JTT-9093-2023
dc.authorwosidZhang, Yuyao/KEH-7175-2024
dc.authorwosidZhao, Shujun/R-8024-2019
dc.authorwosidLi, Xiaoli/JVZ-4089-2024
dc.contributor.authorAblikim, M.
dc.contributor.authorAchasov, M. N.
dc.contributor.authorAdlarson, P.
dc.contributor.authorAlbrecht, M.
dc.contributor.authorAliberti, R.
dc.contributor.authorAmoroso, A.
dc.contributor.authorÇetin, Serkant Ali
dc.date.accessioned2024-05-19T14:50:59Z
dc.date.available2024-05-19T14:50:59Z
dc.date.issued2023
dc.departmentİstinye Üniversitesien_US
dc.description.abstractUsing a sample of 4.3 x 105 eta' -> eta pi 0 pi 0 events selected from the ten billion J=psi event dataset collected with the BESIII detector, we study the decay eta' -> eta pi 0 pi 0 within the framework of nonrelativistic effective field theory. Evidence for a structure at pi+pi- mass threshold is observed in the invariant mass spectrum of pi 0 pi 0 with a statistical significance of around 3.5 sigma, which is consistent with the cusp effect as predicted by the nonrelativistic effective field theory. After introducing the amplitude for describing the cusp effect, the pi pi scattering length combination a0 - a2 is determined to be 0.226 10.060stat 10.013syst, which is in good agreement with theoretical calculation of 0.2644 10.0051.en_US
dc.description.sponsorshipNational Key RD Program; National Natural Science Foundation of~ China (NSFC); Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC; CAS; CAS Key Research Program of Frontier Sciences; 100 Talents Program of CAS; INPAC; Shanghai Key Laboratory forParticle Physics and Cosmology [120022510, 12025502]; ERC [12035009, 12035013, 12192260, 12192261, 12192262, 12192263, 12192264, 12192265, 12225509, U1832207, QYZDJ-SSW-SLH040, 758462, 894790, 443159800, DPT2006K-120470, DH140054, DH160214, DE-FG02-05ER41374]; European Union; German Research Foundation DFG; Collaborative Research Center CRC [2020YFA0406400]; Istituto Nazionale di Fisica Nucleare, Italy [11635010]; Ministry of Development of Turkey; National Science and Technology fund; STFC (United Kingdom); Royal Society, UK [11735014]; Swedish Research Council [111835012]; U.S. Department of Energy [11935015]en_US
dc.description.sponsorshipThe BESIII Collaboration thanks the staff of BEPCII and the IHEP computing center for their strong support. This work is supported in part by National Key R&D Program of No.2020YFA0406300 No. 2020YFA0406400; National Natural Science Foundation of China (NSFC) under No. 11635010, No. 11735014, No. 111835012, No. 11935015, No. 11935016, No. 11935018, No. 11961141012, No.12005195, No. 120022510, No. 12025502, No. 12035009, No. 12035013, No. 12192260, No. 12192261,No. 12192262, No. 12192263, No. 12192264, No. 12192265, No. 12225509; the Chinese Academy of Sciences (CAS) Large-Scale Scientific Facility Program; Joint Large-Scale Scientific Facility Funds of the NSFC and CAS under Contract No. U1832207; CAS Key Research Program of Frontier Sciences under Contract No. QYZDJ-SSW-SLH040; 100 Talents Program of CAS; INPAC and Shanghai Key Laboratory for Particle Physics and Cosmology; ERC under Contract No. 758462; European Union's Horizon 2020 research and innovation program under Marie Sklodowska-Curie Grant Agreement under Contract No. 894790; German Research Foundation DFG under Contracts No. 443159800, Collaborative Research Center CRC 1044, GRK 2149; Istituto Nazionale di Fisica Nucleare, Italy; Ministry of Development of Turkey under Contract No. DPT2006K-120470; National Science and Technology fund; STFC (United Kingdom); The Royal Society, UK under Contracts No. DH140054, No. DH160214; The Swedish Research Council; U.S. Department of Energy under Award No. DE-FG02-05ER41374.en_US
dc.identifier.doi10.1103/PhysRevLett.130.081901
dc.identifier.issn0031-9007
dc.identifier.issn1079-7114
dc.identifier.issue8en_US
dc.identifier.pmid36898113en_US
dc.identifier.scopus2-s2.0-85149669098en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org10.1103/PhysRevLett.130.081901
dc.identifier.urihttps://hdl.handle.net/20.500.12713/5853
dc.identifier.volume130en_US
dc.identifier.wosWOS:000982318800010en_US
dc.identifier.wosqualityN/Aen_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAmer Physical Socen_US
dc.relation.ispartofPhysical Review Lettersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.snmz20240519_kaen_US
dc.subjectElectromagnetic Correctionsen_US
dc.subjectPien_US
dc.subject3-Pi(0)en_US
dc.subjectTofen_US
dc.titleEvidence for the Cusp Effect in ?0 Decays into ??0?0en_US
dc.typeArticleen_US

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