{"paper":{"title":"Probing Boosted Light Scalars in the Type-I 2HDM","license":"http://creativecommons.org/licenses/by/4.0/","headline":"Tagging boosted double-b fat-jets from light scalars paired with gauge bosons can exclude heavy scalars up to 540 GeV at the HL-LHC in Type-I 2HDM.","cross_cats":[],"primary_cat":"hep-ph","authors_text":"Chandrima Sen, Partha Konar, Tanmoy Mondal","submitted_at":"2026-05-13T10:53:34Z","abstract_excerpt":"In the Type-I two-Higgs Doublet Model (2HDM), the additional scalars may be light ($\\lesssim 100$ GeV) without conflicting with experimental constraints from LHC searches or from flavour observables. So far, the studies of light scalars at the LHC have been limited to exploring non-standard decays of the Standard Model (SM) Higgs boson or via $b\\bar b$ associated production followed by leptonic decays of the light scalar. A light scalar in Type-I 2HDM can evade these search strategies due to its potentially tiny coupling to the SM Higgs boson and its suppressed coupling to quarks. In this work"},"claims":{"count":4,"items":[{"kind":"strongest_claim","text":"We find that tagging such a `boosted double-b fat-jet (J_bb)' signature in association with a SM gauge boson provides an excellent probe of the Type-I 2HDM for hierarchical scalar spectra. [...] the 2σ exclusion reach for the heavy scalars extending up to ∼540 GeV (∼365 GeV) at the HL-LHC with 3000 fb^{-1} (LHC with 300 fb^{-1}) luminosity for light scalar masses in the range 30--70 GeV.","source":"verdict.strongest_claim","status":"machine_extracted","claim_id":"C1","attestation":"unclaimed"},{"kind":"weakest_assumption","text":"The analysis assumes that the light scalar decays predominantly to b b-bar with high enough branching ratio, that the boosted fat-jet tagging efficiency remains high, and that standard-model backgrounds can be controlled sufficiently for the quoted exclusion reaches to hold.","source":"verdict.weakest_assumption","status":"machine_extracted","claim_id":"C2","attestation":"unclaimed"},{"kind":"one_line_summary","text":"Boosted light scalars decaying to b b-bar in Type-I 2HDM can be tagged as double-b fat-jets and used with SM gauge bosons to probe heavy scalars up to 540 GeV at the HL-LHC for masses 30-70 GeV.","source":"verdict.one_line_summary","status":"machine_extracted","claim_id":"C3","attestation":"unclaimed"},{"kind":"headline","text":"Tagging boosted double-b fat-jets from light scalars paired with gauge bosons can exclude heavy scalars up to 540 GeV at the HL-LHC in Type-I 2HDM.","source":"verdict.pith_extraction.headline","status":"machine_extracted","claim_id":"C4","attestation":"unclaimed"}],"snapshot_sha256":"5b831b449e976e184caff5ddcb9e47c46028c68fa8af77bc91ab3ff916525d01"},"source":{"id":"2605.13336","kind":"arxiv","version":1},"verdict":{"id":"56bdb697-c9b5-4d39-98ac-2a19dec2e16d","model_set":{"reader":"grok-4.3"},"created_at":"2026-05-14T18:24:29.323786Z","strongest_claim":"We find that tagging such a `boosted double-b fat-jet (J_bb)' signature in association with a SM gauge boson provides an excellent probe of the Type-I 2HDM for hierarchical scalar spectra. [...] the 2σ exclusion reach for the heavy scalars extending up to ∼540 GeV (∼365 GeV) at the HL-LHC with 3000 fb^{-1} (LHC with 300 fb^{-1}) luminosity for light scalar masses in the range 30--70 GeV.","one_line_summary":"Boosted light scalars decaying to b b-bar in Type-I 2HDM can be tagged as double-b fat-jets and used with SM gauge bosons to probe heavy scalars up to 540 GeV at the HL-LHC for masses 30-70 GeV.","pipeline_version":"pith-pipeline@v0.9.0","weakest_assumption":"The analysis assumes that the light scalar decays predominantly to b b-bar with high enough branching ratio, that the boosted fat-jet tagging efficiency remains high, and that standard-model backgrounds can be controlled sufficiently for the quoted exclusion reaches to hold.","pith_extraction_headline":"Tagging boosted double-b fat-jets from light scalars paired with gauge bosons can exclude heavy scalars up to 540 GeV at the HL-LHC in Type-I 2HDM."},"references":{"count":52,"sample":[{"doi":"","year":2001,"title":"Phenomenology of a New Minimal Supersymmetric Extension of the Standard Model","work_id":"bbf8674a-6078-49fd-891a-485e721ad3d3","ref_index":1,"cited_arxiv_id":"hep-ph/0009125","is_internal_anchor":true},{"doi":"","year":2000,"title":"Light Axion within the Next-to-Minimal Supersymmetric Standard Model","work_id":"22e07f5c-3246-4e1c-93f3-4387c8d3d773","ref_index":2,"cited_arxiv_id":"hep-ph/0008192","is_internal_anchor":true},{"doi":"","year":null,"title":"Towards a No-Lose Theorem for NMSSM Higgs Discovery at the LHC","work_id":"9eec5686-0e9a-418d-9eaf-489ce8d6be67","ref_index":3,"cited_arxiv_id":"hep-ph/0305109","is_internal_anchor":true},{"doi":"","year":2005,"title":"Escaping the Large Fine Tuning and Little Hierarchy Problems in the Next to Minimal Supersymmetric Model and h-> aa Decays","work_id":"a4597da4-28ad-4982-be76-887da464e6f7","ref_index":4,"cited_arxiv_id":"hep-ph/0502105","is_internal_anchor":true},{"doi":"","year":2008,"title":"Secluded WIMP Dark Matter","work_id":"df3adb0d-9bcf-4fdb-a476-4f9a994ca2a4","ref_index":5,"cited_arxiv_id":"0711.4866","is_internal_anchor":true}],"resolved_work":52,"snapshot_sha256":"c581bbd7af2b6e33b068572f84e0be7c945b1062b348e3a01e0c89de335e0128","internal_anchors":33},"formal_canon":{"evidence_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"author_claims":{"count":0,"strong_count":0,"snapshot_sha256":"258153158e38e3291e3d48162225fcdb2d5a3ed65a07baac614ab91432fd4f57"},"builder_version":"pith-number-builder-2026-05-17-v1"}