{"title":"Roles of the N(1535) and a0(980) in the process Λc+→π+ηn","authors":"Meng-Yuan Li, Wen-Tao Lyu, Li-Juan Liu, En Wang","doi":"10.1103/physrevd.111.034046","DOIUrl":null,"url":null,"abstract":"We have investigated the process Λ</a:mi>c</a:mi>+</a:mo></a:msubsup>→</a:mo>π</a:mi>+</a:mo></a:msup>η</a:mi>n</a:mi></a:math> by taking into account the contributions from the nucleon resonance <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mi>N</e:mi><e:mo stretchy=\"false\">(</e:mo><e:mn>1535</e:mn><e:mo stretchy=\"false\">)</e:mo></e:math> and the scalar meson <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:msub><i:mi>a</i:mi><i:mn>0</i:mn></i:msub><i:mo stretchy=\"false\">(</i:mo><i:mn>980</i:mn><i:mo stretchy=\"false\">)</i:mo></i:math>, which could be dynamically generated by the interaction of the <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:mi>S</m:mi></m:math>-wave pseudoscalar meson-octet baryon and the <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mi>S</o:mi></o:math>-wave pseudoscalar meson-pseudoscalar meson, respectively. Our results show that, in <q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><q:mi>η</q:mi><q:mi>n</q:mi></q:math> invariant mass distribution, there is a significant near-threshold enhancement structure, which could be associated with <s:math xmlns:s=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><s:mi>N</s:mi><s:mo stretchy=\"false\">(</s:mo><s:mn>1535</s:mn><s:mo stretchy=\"false\">)</s:mo></s:math>. On the other hand, one can find a clear cusp structure of <w:math xmlns:w=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><w:msub><w:mi>a</w:mi><w:mn>0</w:mn></w:msub><w:mo stretchy=\"false\">(</w:mo><w:mn>980</w:mn><w:mo stretchy=\"false\">)</w:mo></w:math> in π</ab:mi>+</ab:mo></ab:msup>η</ab:mi></ab:math> invariant mass distribution. We further estimate the ratio <cb:math xmlns:cb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><cb:mrow><cb:mi>R</cb:mi><cb:mo>=</cb:mo><cb:mi mathvariant=\"script\">B</cb:mi><cb:mo stretchy=\"false\">(</cb:mo><cb:msubsup><cb:mrow><cb:mi mathvariant=\"normal\">Λ</cb:mi></cb:mrow><cb:mrow><cb:mi>c</cb:mi></cb:mrow><cb:mrow><cb:mo>+</cb:mo></cb:mrow></cb:msubsup><cb:mo stretchy=\"false\">→</cb:mo><cb:msub><cb:mrow><cb:mi>a</cb:mi></cb:mrow><cb:mrow><cb:mn>0</cb:mn></cb:mrow></cb:msub><cb:mo stretchy=\"false\">(</cb:mo><cb:mn>980</cb:mn><cb:msup><cb:mrow><cb:mo stretchy=\"false\">)</cb:mo></cb:mrow><cb:mrow><cb:mo>+</cb:mo></cb:mrow></cb:msup><cb:mi>n</cb:mi><cb:mo stretchy=\"false\">)</cb:mo><cb:mo>/</cb:mo><cb:mi mathvariant=\"script\">B</cb:mi><cb:mo stretchy=\"false\">(</cb:mo><cb:msubsup><cb:mrow><cb:mi mathvariant=\"normal\">Λ</cb:mi></cb:mrow><cb:mrow><cb:mi>c</cb:mi></cb:mrow><cb:mrow><cb:mo>+</cb:mo></cb:mrow></cb:msubsup><cb:mo stretchy=\"false\">→</cb:mo><cb:msup><cb:mrow><cb:mi>π</cb:mi></cb:mrow><cb:mrow><cb:mo>+</cb:mo></cb:mrow></cb:msup><cb:mi>η</cb:mi><cb:mi>n</cb:mi><cb:mo stretchy=\"false\">)</cb:mo><cb:mo>≈</cb:mo><cb:mn>0.313</cb:mn></cb:mrow></cb:math>. Our results can be tested by BESIII, Belle II, and the proposed Super Tau-Charm Facility experiments in the future. <jats:supplementary-material> <jats:copyright-statement>Published by the American Physical Society</jats:copyright-statement> <jats:copyright-year>2025</jats:copyright-year> </jats:permissions> </jats:supplementary-material>","PeriodicalId":20167,"journal":{"name":"Physical Review D","volume":"130 1","pages":""},"PeriodicalIF":5.0000,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review D","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physrevd.111.034046","RegionNum":2,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Physics and Astronomy","Score":null,"Total":0}
引用次数: 0
Abstract
We have investigated the process Λc+→π+ηn by taking into account the contributions from the nucleon resonance N(1535) and the scalar meson a0(980), which could be dynamically generated by the interaction of the S-wave pseudoscalar meson-octet baryon and the S-wave pseudoscalar meson-pseudoscalar meson, respectively. Our results show that, in ηn invariant mass distribution, there is a significant near-threshold enhancement structure, which could be associated with N(1535). On the other hand, one can find a clear cusp structure of a0(980) in π+η invariant mass distribution. We further estimate the ratio R=B(Λc+→a0(980)+n)/B(Λc+→π+ηn)≈0.313. Our results can be tested by BESIII, Belle II, and the proposed Super Tau-Charm Facility experiments in the future. Published by the American Physical Society2025
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Physical Review D (PRD) is a leading journal in elementary particle physics, field theory, gravitation, and cosmology and is one of the top-cited journals in high-energy physics.
PRD covers experimental and theoretical results in all aspects of particle physics, field theory, gravitation and cosmology, including:
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