The CMS experiment announces several new results for the Lepton-Photon 2025 conference.
A major highlight is the high-precision measurement of the integrated luminosity. With an uncertainty of 0.73%, this is the most precise luminosity measurement at a bunched-beam hadron collider. The measurement implements several years of developments in van-der-Meer scan and analysis methodology, and benefits from the combination of several independent luminosity detectors [LUM-20-001].
Several of the newly presented results focus on the search for new (heavy or light) scalar or pseudoscalar particles. A search for a massive resonance X decaying into a pair of 125 GeV Higgs bosons, X → HH, is presented. The decay mode bbττ is explored in which one Higgs boson decays into a pair of b-quarks, bb, and one decays into a pair of τ-leptons. This channel combines large branching ratios (bb) with manageable backgrounds (ττ). The most stringent limits to date are set in the X mass range between 1.4 and 4.5 TeV [B2G-24-014].
A first search for a scalar leptoquark (LQ) is performed in muon-quark collisions, where a single leptoquark could be created in the s-channel. The signal would appear as a bump in the muon-jet invariant mass spectrum. The presence of LQ signals is tested for masses between 1.5 and 5 TeV, and upper limits on muon-quark couplings are set [EXO-24-005].
Here is an evolving list of all our results presented at the conference.
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Group and identifier |
Title of the study |
Full paper/PAS |
Physics briefing |
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B2G-24-008 |
Search for charged Higgs bosons decaying into a top and a bottom quark in proton-proton collisions at 13 TeV |
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B2G-24-014 |
Search for heavy resonances decaying into two Higgs bosons in the bbtautau final state in proton-proton collisions at 13 TeV |
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EXO-24-005 |
Search for scalar leptoquarks produced via muon-quark scattering in pp collisions at 13 TeV |
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EXO-24-029 |
Search for s-channel production of lepton-enriched semivisible jets in proton-proton collisions at 13 TeV |
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HIG-25-004 |
Constraints on the Higgs boson total decay width using signal-background interference in the diphoton final state with proton-proton collisions at 13 TeV |
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LUM-20-001 |
Precision luminosity measurement in proton-proton collisions at 13 TeV with the CMS detector |
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Read more about these results:
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