{"title":"Investigation of Λc states and D¯N molecule production at the EicC and EIC","authors":"Kai-Sa Qiao, Bing-Song Zou","doi":"10.1103/physrevd.111.056029","DOIUrl":null,"url":null,"abstract":"We explore various Λ</a:mi>c</a:mi></a:msub></a:math> states, including <d:math xmlns:d=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><d:msub><d:mi mathvariant=\"normal\">Λ</d:mi><d:mi>c</d:mi></d:msub></d:math>, <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:msub><g:mi mathvariant=\"normal\">Λ</g:mi><g:mi>c</g:mi></g:msub><g:mo stretchy=\"false\">(</g:mo><g:mn>2595</g:mn><g:mo stretchy=\"false\">)</g:mo></g:math>, <l:math xmlns:l=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><l:msub><l:mi mathvariant=\"normal\">Λ</l:mi><l:mi>c</l:mi></l:msub><l:mo stretchy=\"false\">(</l:mo><l:mn>2940</l:mn><l:mo stretchy=\"false\">)</l:mo></l:math>, and the predicted <q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><q:mo stretchy=\"false\">(</q:mo><q:mover accent=\"true\"><q:mi>D</q:mi><q:mo stretchy=\"false\">¯</q:mo></q:mover><q:mi>N</q:mi><q:mo stretchy=\"false\">)</q:mo></q:math> hadronic molecular states, in photoproduction and electroproduction to estimate their yields at the EicC and EIC. Assuming <w:math xmlns:w=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><w:msub><w:mi mathvariant=\"normal\">Λ</w:mi><w:mi>c</w:mi></w:msub><w:mo stretchy=\"false\">(</w:mo><w:mn>2940</w:mn><w:mo stretchy=\"false\">)</w:mo></w:math> as either a hadronic molecular state or a three-quark state, our analysis demonstrates that its production rates are of the same order of magnitude, posing challenges in identifying its underlying structure. After considering the integral luminosity, the yields of <bb:math xmlns:bb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><bb:msub><bb:mi mathvariant=\"normal\">Λ</bb:mi><bb:mi>c</bb:mi></bb:msub></bb:math> excited states reach <eb:math xmlns:eb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><eb:msup><eb:mn>10</eb:mn><eb:mn>6</eb:mn></eb:msup></eb:math> to <gb:math xmlns:gb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><gb:msup><gb:mn>10</gb:mn><gb:mn>7</gb:mn></gb:msup></gb:math> at the EicC and EIC. The <ib:math xmlns:ib=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><ib:mo stretchy=\"false\">(</ib:mo><ib:mover accent=\"true\"><ib:mi>D</ib:mi><ib:mo stretchy=\"false\">¯</ib:mo></ib:mover><ib:mi>N</ib:mi><ib:mo stretchy=\"false\">)</ib:mo></ib:math> molecular states with both isospin <ob:math xmlns:ob=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><ob:mi>I</ob:mi><ob:mo>=</ob:mo><ob:mn>0</ob:mn></ob:math> and <qb:math xmlns:qb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><qb:mi>I</qb:mi><qb:mo>=</qb:mo><qb:mn>1</qb:mn></qb:math> are also studied, with yields reaching <sb:math xmlns:sb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><sb:msup><sb:mn>10</sb:mn><sb:mn>5</sb:mn></sb:msup></sb:math>, making them likely to be detectable at these facilities. <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":"38 1","pages":""},"PeriodicalIF":5.3000,"publicationDate":"2025-03-31","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.111.056029","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}
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Abstract
We explore various Λc states, including Λc, Λc(2595), Λc(2940), and the predicted (D¯N) hadronic molecular states, in photoproduction and electroproduction to estimate their yields at the EicC and EIC. Assuming Λc(2940) as either a hadronic molecular state or a three-quark state, our analysis demonstrates that its production rates are of the same order of magnitude, posing challenges in identifying its underlying structure. After considering the integral luminosity, the yields of Λc excited states reach 106 to 107 at the EicC and EIC. The (D¯N) molecular states with both isospin I=0 and I=1 are also studied, with yields reaching 105, making them likely to be detectable at these facilities. Published by the American Physical Society2025
期刊介绍：
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:
Particle physics experiments,
Electroweak interactions,
Strong interactions,
Lattice field theories, lattice QCD,
Beyond the standard model physics,
Phenomenological aspects of field theory, general methods,
Gravity, cosmology, cosmic rays,
Astrophysics and astroparticle physics,
General relativity,
Formal aspects of field theory, field theory in curved space,
String theory, quantum gravity, gauge/gravity duality.
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