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Probing anomalous top-Higgs couplings at the HL-LHC via H→WW* decay channels 通过H→WW*衰变通道探测HL-LHC上的异常顶-希格斯耦合
Chinese Physical Society Pub Date : 2018-10-01 DOI: 10.1088/1674-1137/43/1/013102
Y. Liu 刘, S. Moretti
{"title":"Probing anomalous top-Higgs couplings at the HL-LHC via H→WW* decay channels","authors":"Y. Liu 刘, S. Moretti","doi":"10.1088/1674-1137/43/1/013102","DOIUrl":"https://doi.org/10.1088/1674-1137/43/1/013102","url":null,"abstract":"We study the prospects of probing the anomalous tHq (q = u, c) couplings via SS2L or 3L signatures at the High Luminosity (HL-LHC) run of the 14 TeV CERN collider. We focus on signals of the tH associated production followed by the decay modes t → bℓ+νℓ and H → WW*, and t t ¯ production followed by the decay modes t → bℓ+νℓ and t ¯ → H ( → W W ∗ ) q ¯ , where ℓ = e,μ. Based on two types of H → WW* decay topologies, one assuming the semileptonic decay mode H → WW*→ℓ+νjj and the other the fully leptonic decay mode H → W W ∗ → ℓ + ν ℓ − ν ¯ , we perform a full simulation for signals and backgrounds. It is shown that, at the future HL-LHC, the branching ratio Br(t → uh) (Br(t → ch)) can be probed to 1.17 (1.56) × 10−3 for the same-sign di-lepton channel, and to 7.1 × 10−4 (1.39 × 10−3) for the 3L channel at 3σ sensitivity.","PeriodicalId":345560,"journal":{"name":"Chinese Physical Society","volume":"115 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133821459","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Doubly-charged scalar in four-body decays of neutral flavored mesons 中性味介子四体衰变中的双电荷标量
Chinese Physical Society Pub Date : 1900-01-01 DOI: 10.1088/1674-1137/43/1/013103
T. Wang 王, Geng 史 Li 李, Y. Jiang 姜, G. Wang 王
{"title":"Doubly-charged scalar in four-body decays of neutral flavored mesons","authors":"T. Wang 王, Geng 史 Li 李, Y. Jiang 姜, G. Wang 王","doi":"10.1088/1674-1137/43/1/013103","DOIUrl":"https://doi.org/10.1088/1674-1137/43/1/013103","url":null,"abstract":"We study the four-body decays of neutral flavored mesons, including K ¯ 0 , D0, B ¯ 0 , and B ¯ s 0 . These processes, which could be induced by a hypothetical doubly-charged scalar particle, do not conserve the lepton number. Assuming, as an example, that the mass of the doubly-charged particle is 1000 GeV, and using the upper bounds of the couplings, we calculate the branching ratios of different channels. For K ¯ 0 → h 1 + h 2 + e − e − , D 0 → h 1 − h 2 − e + e + , and B ¯ d , s 0 → h 1 + h 2 + e − e − , it is of the order of 10−30, 10−32–10−29, and 10−33–10−28, respectively. Based on the experimental results for the D 0 → h 1 − h 2 − l 1 + l 2 + channels, we also find the upper limit for the quantity s Δ h i j M Δ 2 .","PeriodicalId":345560,"journal":{"name":"Chinese Physical Society","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116863681","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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