Measurement of <i>K<sub>S</sub></i><SUP>0</SUP> and Λ<SUP>0</SUP> production in <i>tt</i> dileptonic events in <i>pp</i> collisions at √<i>s</i>=7 TeV with the ATLAS detector



Aad, G, Abbott, B, Abbott, DC, Abdinov, O, Abud, A Abed, Abeling, K, Abhayasinghe, DK, Abidi, SH, AbouZeid, OS, Abraham, NL
et al (show 2909 more authors) (2019) Measurement of <i>K<sub>S</sub></i><SUP>0</SUP> and Λ<SUP>0</SUP> production in <i>tt</i> dileptonic events in <i>pp</i> collisions at √<i>s</i>=7 TeV with the ATLAS detector. EUROPEAN PHYSICAL JOURNAL C, 79 (12). 1017-.

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Abstract

Measurements of $K_S^0$ and $\Lambda^0$ production in $t\bar{t}$ final states have been performed. They are based on a data sample with integrated luminosity of 4.6 $\mathrm{fb}^{-1}$ from proton-proton collisions at a centre-of-mass energy of 7 TeV, collected in 2011 with the ATLAS detector at the Large Hadron Collider. Neutral strange particles are separated into three classes, depending on whether they are contained in a jet, with or without a $b$-tag, or not associated with a selected jet. The aim is to look for differences in their main kinematic distributions. A comparison of data with several Monte Carlo simulations using different hadronisation and fragmentation schemes, colour reconnection models and different tunes for the underlying event has been made. The production of neutral strange particles in $t\bar{t}$ dileptonic events is found to be well described by current Monte Carlo models for $K_S^0$ and $\Lambda^0$ production within jets, but not for those produced outside jets.

Item Type: Article
Additional Information: 60 pages in total, author list starting page 44, 12 figures, 19 tables, published version in Eur. Phys. J. C. All figures including auxiliary material figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/TOPQ-2016-05
Uncontrolled Keywords: hep-ex, hep-ex
Depositing User: Symplectic Admin
Date Deposited: 02 Jan 2020 16:58
Last Modified: 10 Oct 2023 14:26
DOI: 10.1140/epjc/s10052-019-7512-y
Open Access URL: https://link.springer.com/article/10.1140%2Fepjc%2...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3068222