Szczegóły publikacji
Opis bibliograficzny
Search for dark matter production in association with bottom quarks and a lepton pair in proton-proton collisions at $\sqrt{s}$ = 13TeV / V. Chekhovsky, [et al.], V. AVATI, A. BELLORA, L. FORTHOMME, L. GRZANKA, M. MALAWSKI, K. PIOTRZKOWSKI, [et al.] // The Journal of High Energy Physics [Dokument elektroniczny]. — Czasopismo elektroniczne ; ISSN 1029-8479 . — 2026 — iss. 6 art. no. 14, s. [1], 1–48. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 25–31, Abstr. — Publikacja dostępna online od: 2026-06-01. — A. Bellora - dod. afiliacje: Università di Torino, Torino, Italy ; Università del Piemonte Orientale, Novara, Italy
Autorzy (2422)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 169382 |
|---|---|
| Data dodania do BaDAP | 2026-09-16 |
| Tekst źródłowy | URL |
| DOI | 10.1007/JHEP06(2026)014 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | The Journal of High Energy Physics |
Abstract
A search is performed for dark matter produced in association with bottom quarks and a pair of electrons or muons in data collected with the CMS detector at the LHC, corresponding to 138 fb−1 of integrated luminosity of proton-proton collisions at a center-of-mass energy of 13 TeV. For the first time at the LHC, the associated production of a bottom quark-antiquark pair and a new heavy neutral Higgs boson (H) that subsequently decays into a leptonically decaying Z boson and a pseudoscalar (a) is explored. The latter acts as a dark matter mediator in the context of the two Higgs doublet model plus a pseudoscalar (2HDM+a). Multivariate techniques that target a wide range of mass configurations for the H and a particles are used. The observations are consistent with the expectations from standard model processes. Upper limits at 95% confidence level are set on the product of cross section and branching fraction of the new particles, ranging from 10−2 pb for an H mass of 400 GeV to 10−3 pb for an H mass of 2000 GeV. Constraints on the parameter space of a benchmark 2HDM+a model are derived and compared with expectations in the context of cosmological predictions.
