Properties of g→bb¯ at small opening angles in pp collisions with the ATLAS detector at √s=13 TeV

0520717 - FZÚ 2020 RIV US eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2898 authors
Properties of g→bb¯ at small opening angles in pp collisions with the ATLAS detector at √s=13 TeV.
Physical Review D. Roč. 99, č. 5 (2019), s. 1-26, č. článku 052004. ISSN 2470-0010. E-ISSN 2470-0029
Research Infrastructure: CERN-CZ - 90058
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * numerical calculations: Monte Carlo * background * experimental results * 13000 GeV-cms
OECD category: Particles and field physics
Impact factor: 4.833, year: 2019
Method of publishing: Open access

The fragmentation of high-energy gluons at small opening angles is largely unconstrained by present measurements. Gluon splitting to b-quark pairs is a unique probe into the properties of gluon fragmentation because identified b-tagged jets provide a proxy for the quark daughters of the initial gluon. In this study, key differential distributions related to the g→bb¯ process are measured using 33  fb-1 of s=13  TeV pp collision data recorded by the ATLAS experiment at the LHC in 2016. Jets constructed from charged-particle tracks, clustered with the anti-kt jet algorithm with radius parameter R=0.2, are used to probe angular scales below the R=0.4 jet radius. The observables are unfolded to particle level in order to facilitate direct comparisons with predictions from present and future simulations.
Permanent Link: http://hdl.handle.net/11104/0305374