{"title":"质子-质子碰撞产生的内在魅力和D+ - D -不对称性","authors":"G. I. Lykasov, M. N. Sorokovikov, S. J. Brodsky","doi":"10.1103/physrevd.111.074035","DOIUrl":null,"url":null,"abstract":"We investigate the contribution of the charm-anticharm (c</a:mi>c</a:mi>¯</a:mo></a:mover></a:math>) asymmetry of the proton eigenstate obtained from QCD lattice gauge to the asymmetry of <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:msup><e:mi>D</e:mi><e:mo>+</e:mo></e:msup><e:mo>,</e:mo><e:msup><e:mi>D</e:mi><e:mo>−</e:mo></e:msup></e:math> and <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:msup><g:mi>D</g:mi><g:mn>0</g:mn></g:msup><g:mo>,</g:mo><g:msup><g:mover accent=\"true\"><g:mi>D</g:mi><g:mo stretchy=\"false\">¯</g:mo></g:mover><g:mn>0</g:mn></g:msup></g:math> mesons produced in <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:mi>p</k:mi><k:mi>p</k:mi></k:math> collisions at large Feynman variables <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:mi>x</m:mi></m:math>. It is shown that an important tool for establishing the intrinsic charm (IC) content of the proton is the charm hadron-antihadron asymmetry formed in <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mi>p</o:mi><o:mi>p</o:mi></o:math> collisions. Predictions for the asymmetry as a function of <q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><q:mi>x</q:mi></q:math> for different IC probabilities are presented. We show that the interference of the intrinsic <s:math xmlns:s=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><s:mrow><s:mo stretchy=\"false\">|</s:mo><s:mi>u</s:mi><s:mi>u</s:mi><s:mi>d</s:mi><s:mi>c</s:mi><s:mover accent=\"true\"><s:mrow><s:mi>c</s:mi></s:mrow><s:mrow><s:mo stretchy=\"false\">¯</s:mo></s:mrow></s:mover><s:mo stretchy=\"false\">⟩</s:mo></s:mrow></s:math> Fock state with the standard contribution from the perturbative QCD evolution leads to a large <y:math xmlns:y=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><y:msup><y:mi>D</y:mi><y:mo>+</y:mo></y:msup><y:msup><y:mi>D</y:mi><y:mo>−</y:mo></y:msup></y:math> asymmetry at large Feynman x</ab:mi></ab:math>. <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":"96 1","pages":""},"PeriodicalIF":5.0000,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Intrinsic charm and the D+−D− asymmetry produced in proton-proton collisions\",\"authors\":\"G. I. Lykasov, M. N. Sorokovikov, S. J. Brodsky\",\"doi\":\"10.1103/physrevd.111.074035\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We investigate the contribution of the charm-anticharm (c</a:mi>c</a:mi>¯</a:mo></a:mover></a:math>) asymmetry of the proton eigenstate obtained from QCD lattice gauge to the asymmetry of <e:math xmlns:e=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><e:msup><e:mi>D</e:mi><e:mo>+</e:mo></e:msup><e:mo>,</e:mo><e:msup><e:mi>D</e:mi><e:mo>−</e:mo></e:msup></e:math> and <g:math xmlns:g=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><g:msup><g:mi>D</g:mi><g:mn>0</g:mn></g:msup><g:mo>,</g:mo><g:msup><g:mover accent=\\\"true\\\"><g:mi>D</g:mi><g:mo stretchy=\\\"false\\\">¯</g:mo></g:mover><g:mn>0</g:mn></g:msup></g:math> mesons produced in <k:math xmlns:k=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><k:mi>p</k:mi><k:mi>p</k:mi></k:math> collisions at large Feynman variables <m:math xmlns:m=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><m:mi>x</m:mi></m:math>. It is shown that an important tool for establishing the intrinsic charm (IC) content of the proton is the charm hadron-antihadron asymmetry formed in <o:math xmlns:o=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><o:mi>p</o:mi><o:mi>p</o:mi></o:math> collisions. Predictions for the asymmetry as a function of <q:math xmlns:q=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><q:mi>x</q:mi></q:math> for different IC probabilities are presented. We show that the interference of the intrinsic <s:math xmlns:s=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><s:mrow><s:mo stretchy=\\\"false\\\">|</s:mo><s:mi>u</s:mi><s:mi>u</s:mi><s:mi>d</s:mi><s:mi>c</s:mi><s:mover accent=\\\"true\\\"><s:mrow><s:mi>c</s:mi></s:mrow><s:mrow><s:mo stretchy=\\\"false\\\">¯</s:mo></s:mrow></s:mover><s:mo stretchy=\\\"false\\\">⟩</s:mo></s:mrow></s:math> Fock state with the standard contribution from the perturbative QCD evolution leads to a large <y:math xmlns:y=\\\"http://www.w3.org/1998/Math/MathML\\\" display=\\\"inline\\\"><y:msup><y:mi>D</y:mi><y:mo>+</y:mo></y:msup><y:msup><y:mi>D</y:mi><y:mo>−</y:mo></y:msup></y:math> asymmetry at large Feynman x</ab:mi></ab:math>. <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\":\"96 1\",\"pages\":\"\"},\"PeriodicalIF\":5.0000,\"publicationDate\":\"2025-04-28\",\"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.111.074035\",\"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}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physical Review D","FirstCategoryId":"101","ListUrlMain":"https://doi.org/10.1103/physrevd.111.074035","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}
Intrinsic charm and the D+−D− asymmetry produced in proton-proton collisions
We investigate the contribution of the charm-anticharm (cc¯) asymmetry of the proton eigenstate obtained from QCD lattice gauge to the asymmetry of D+,D− and D0,D¯0 mesons produced in pp collisions at large Feynman variables x. It is shown that an important tool for establishing the intrinsic charm (IC) content of the proton is the charm hadron-antihadron asymmetry formed in pp collisions. Predictions for the asymmetry as a function of x for different IC probabilities are presented. We show that the interference of the intrinsic |uudcc¯⟩ Fock state with the standard contribution from the perturbative QCD evolution leads to a large D+D− asymmetry at large Feynman x. 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.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
