Szczegóły publikacji
Opis bibliograficzny
Jet fragmentation function and groomed substructure of bottom quark jets in proton-proton collisions at 5.02 TeV / 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. 4 art. no. 147, s. [1], 1–46. — Wymagania systemowe: Adobe Reader. — Bibliogr. s. 25–29, Abstr. — Publikacja dostępna online od: 2026-04-17
Autorzy (2392)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 167929 |
|---|---|
| Data dodania do BaDAP | 2026-06-30 |
| Tekst źródłowy | URL |
| DOI | 10.1007/JHEP04(2026)147 |
| Rok publikacji | 2026 |
| Typ publikacji | artykuł w czasopiśmie |
| Otwarty dostęp |  |
| Creative Commons | |
| Czasopismo/seria | The Journal of High Energy Physics |
Abstract
A measurement of the substructure of bottom quark jets (b jets) in proton-proton (pp) collisions is presented. The measurement uses data collected in pp collisions at s=5.02 TeV, with a low number of simultaneous interactions per bunch crossing, recorded by the CMS experiment in 2017, corresponding to an integrated luminosity of 301 pb−1. An algorithm to identify and cluster the charged decay daughters of b hadrons is developed for this analysis, which facilitates the exposure of the gluon radiation pattern of b jets using iterative Cambridge-Aachen declustering. The soft-drop-groomed jet radius, Rg, and momentum balance, zg, of b quark jets are presented. These observables can be used to test perturbative quantum chromodynamics predictions that account for mass effects. Because the b hadron is partially reconstructed from its charged decay daughters, only charged particles are used for the jet substructure studies. In addition, a jet fragmentation function, zb,ch, is measured, which is defined as the distribution of the ratio of the transverse momentum (pT) of the partially reconstructed b hadron with respect to the charged-particle component of the jet pT. The substructure variable distributions are unfolded to the charged-particle level. The b jet substructure is compared to the substructure of jets in an inclusive jet sample that is dominated by light-quark and gluon jets in order to assess the role of the b quark mass. A strong suppression of emissions at small Rg values is observed for b jets when compared to inclusive jets, consistent with the dead-cone effect. The measurement is also compared with theoretical predictions from Monte Carlo event generators. This is the first substructure measurement of b jets that clusters together the b hadron decay daughters independent of the b hadron species and decay channel.
