{"doi":"10.1103/physrevd.111.053003","title":"Probing charm Yukawa coupling through \n<mml:math xmlns:mml=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><mml:mi>c</mml:mi><mml:mi>h</mml:mi></mml:math>\n associated production at the hadron colliders","abstract":"<jats:p>At present, the study of the charm-quark Yukawa coupling at the Large Hadron Collider mainly focuses on the Higgs decay processes. Such signal suffers from overwhelming QCD background and derives its sensitivity primarily from the <a:math xmlns:a=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><a:mi>V</a:mi><a:mi>h</a:mi></a:math> associated production channel. In addition, sensitivity to a possible <c:math xmlns:c=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><c:mi>C</c:mi><c:mi>P</c:mi></c:math> phase in charm-quark Yukawa at the hadron collider is not discussed. We investigate the charm-Higgs associated production signal that contains a potentially detectable interference term between <e:math xmlns:e=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><e:mi>c</e:mi><e:mi>c</e:mi><e:mi>h</e:mi></e:math> Yukawa coupling mediated diagrams and <g:math xmlns:g=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><g:mi>g</g:mi><g:mi>g</g:mi><g:mi>h</g:mi></g:math> coupling mediated diagram. Such an interference term is sensitive to the relative <i:math xmlns:i=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><i:mi>C</i:mi><i:mi>P</i:mi></i:math> phase between contributing diagrams. High dimensional kinematic information is exploited by machine learning techniques to separate the different contribution, and sensitivity on the coupling is derived. Assuming a real <k:math xmlns:k=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><k:msub><k:mi>κ</k:mi><k:mi>c</k:mi></k:msub></k:math> modification framework, the <m:math xmlns:m=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><m:mrow><m:mn>1</m:mn><m:mi>σ</m:mi></m:mrow></m:math> bound of <o:math xmlns:o=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><o:mo>−</o:mo><o:mn>5.6</o:mn><o:mo>&lt;</o:mo><o:msub><o:mi>κ</o:mi><o:mi>c</o:mi></o:msub><o:mo>&lt;</o:mo><o:mn>5.6</o:mn></o:math> (HL-LHC) and <q:math xmlns:q=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><q:mo>−</q:mo><q:mn>1.51</q:mn><q:mo>&lt;</q:mo><q:msub><q:mi>κ</q:mi><q:mi>c</q:mi></q:msub><q:mo>&lt;</q:mo><q:mn>1.62</q:mn></q:math> (FCC) are achieved. When allowing for <s:math xmlns:s=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><s:mi>C</s:mi><s:mi>P</s:mi></s:math> phase in the charm Yukawa, a combined <u:math xmlns:u=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><u:mrow><u:mn>1</u:mn><u:mi>σ</u:mi></u:mrow></u:math> bound of <w:math xmlns:w=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><w:mn>0.32</w:mn><w:mo>&lt;</w:mo><w:mo stretchy=\"false\">|</w:mo><w:msub><w:mi>κ</w:mi><w:mi>c</w:mi></w:msub><w:mo stretchy=\"false\">|</w:mo><w:mo>&lt;</w:mo><w:mn>1.69</w:mn></w:math>, <ab:math xmlns:ab=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><ab:mo>−</ab:mo><ab:mn>7</ab:mn><ab:mn>7</ab:mn><ab:mi>°</ab:mi><ab:mo>&lt;</ab:mo><ab:mi>α</ab:mi><ab:mo>&lt;</ab:mo><ab:mn>7</ab:mn><ab:mn>7</ab:mn><ab:mi>°</ab:mi></ab:math> (HL-LHC) and <cb:math xmlns:cb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><cb:mn>0.70</cb:mn><cb:mo>&lt;</cb:mo><cb:mo stretchy=\"false\">|</cb:mo><cb:msub><cb:mi>κ</cb:mi><cb:mi>c</cb:mi></cb:msub><cb:mo stretchy=\"false\">|</cb:mo><cb:mo>&lt;</cb:mo><cb:mn>1.29</cb:mn></cb:math>, <gb:math xmlns:gb=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><gb:mo>−</gb:mo><gb:mn>5</gb:mn><gb:mn>5</gb:mn><gb:mi>°</gb:mi><gb:mo>&lt;</gb:mo><gb:mi>α</gb:mi><gb:mo>&lt;</gb:mo><gb:mn>5</gb:mn><gb:mn>5</gb:mn><gb:mi>°</gb:mi></gb:math> (FCC) can be achieved on the magnitude and <ib:math xmlns:ib=\"http://www.w3.org/1998/Math/MathML\" display=\"inline\"><ib:mi>C</ib:mi><ib:mi>P</ib:mi></ib:math> phase of the coupling, respectively.</jats:p>","journal":"Physical Review D","year":2025,"id":67,"datarank":0.0,"base_score":0.0,"endowment":0.0,"self_citation_contribution":0.0,"citation_network_contribution":0.0,"self_endowment_contribution":0.0,"citer_contribution":0.0,"corpus_percentile":null,"corpus_rank":null,"citation_count":0,"citer_count":0,"citers_with_citation_signal":0,"citers_with_endowment":0,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":0.0545,"is_data_producer":false,"deposit_databanks":null,"is_oa":true,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":"2025-03-13","fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":465,"name":"Hou Hong-Sheng","orcid":"0009-0000-2736-2114","position":1,"is_corresponding":false},{"id":466,"name":"Zhuoni Qian","orcid":"0000-0002-2914-7255","position":2,"is_corresponding":false},{"id":467,"name":"Bowen Wang","orcid":"0000-0002-7786-4902","position":3,"is_corresponding":false},{"id":468,"name":"Pei Xu","orcid":"0000-0002-9480-8021","position":4,"is_corresponding":false},{"id":469,"name":"Qingjun Xu","orcid":"0009-0005-8152-7932","position":5,"is_corresponding":false},{"id":464,"name":"Nuoyu Dong","orcid":"0009-0009-7955-3751","position":0,"is_corresponding":true}],"reference_count":68,"raw_metadata":null,"created_at":"2026-03-01T18:20:47.508186Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}