Measurement of K0S and Λ0 production in tt¯ dileptonic events in pp collisions at s√= 7 TeV with the ATLAS detector

Franconi, L.; Miucci, A.; Merlassino, C.; Haug, S.; Weber, M.S.; Anders, J.K.; Beck, H.P.; Ereditato, A.; Weston, T.D. (2019). Measurement of K0S and Λ0 production in tt¯ dileptonic events in pp collisions at s√= 7 TeV with the ATLAS detector. The European physical journal. C, Particles and fields, 79(12) Springer 10.1140/epjc/s10052-019-7512-y

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Measurements of K0S and Λ0 production in tt¯ final states have been performed. They are based on a data sample with integrated luminosity of 4.6 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 tt¯ dileptonic events is found to be well described by current Monte Carlo models for K0S and Λ0 production within jets, but not for those produced outside jets.

Item Type:

Journal Article (Original Article)

Division/Institute:

10 Strategic Research Centers > Albert Einstein Center for Fundamental Physics (AEC)
08 Faculty of Science > Physics Institute > Laboratory for High Energy Physics (LHEP)

UniBE Contributor:

Franconi, Laura; Miucci, Antonio; Merlassino, Claudia; Haug, Sigve; Weber, Michael; Anders, John Kenneth; Beck, Hans Peter; Ereditato, Antonio and Weston, Thomas Daniel

Subjects:

500 Science > 530 Physics

ISSN:

1434-6044

Publisher:

Springer

Language:

English

Submitter:

BORIS Import LHEP

Date Deposited:

29 May 2020 12:10

Last Modified:

31 May 2020 06:29

Publisher DOI:

10.1140/epjc/s10052-019-7512-y

ArXiv ID:

1907.10862v2

Additional Information:

Kollaboration - Es sind nur die Berner Autoren namentlich erwaehnt, The ATLAS collaboration

BORIS DOI:

10.7892/boris.143561

URI:

https://boris.unibe.ch/id/eprint/143561

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