UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS

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2022-08-12 15:25

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Conference: Bucharest University Faculty of Physics 2016 Meeting


Section: Nuclear and Elementary Particles Physics


Title:
Particle production in pp collisions at LHC energies


Authors:
Alexandru Catalin ENE (1,2), Alexandru JIPA (1)


Affiliation:
1) University of Bucharest, Faculty of Physics, Atomic and Nuclear Physics Chair, ROMANIA

2) "Horia Hulubei" National Institute for R&D in Physics and Nuclear Engineering (IFIN-HH) Bucharest-Magurele, ROMANIA


E-mail
alexandru.catalin.ene@cern.ch


Keywords:
LHCb, particle production, mass distributions, background contributions, parton model, the Lund Model, hadronization, strings, strangeness production, beauty production, Pythia


Abstract:
Given the limited understanding of processes that take place at the partonic level and, moreover, the hadronization process in pp collisions at LHC energies, we rely on phenomenological models for predictions. One such model is the Lund String Model which describes the hadronization process from the view-point of an oscillating string that connects the partons. This model is used by the PYTHIA generator for the hadronization process. In this work, we have compared the mass distributions for V0 candidates from experimental data with those from simulated data from LHCb and we have isolated the major background contributions from the simulated data. One major problem in high energy collisions particle production is the separation between the strangeness produced in the partonic processes and the one produced in the hadronization process. For probing the possibility of creating a method with which this separation is achieved, we have compared different distributions of kinematical quantities for beauty and strange particles produced in pp collisions at an energy of 13 TeV in the C.o.M. frame. The data used for this study was generated with PYTHIA 8. We have also studied the behaviour of the so-called beauty jets.


Acknowledgement:
I would like to thank the team leader of the LHCb Romanian Group dr. Florin Maciuc and deputy team leader dr. Alexandru Grecu for their guidance, help, and support for this work. This work has been financially supported through contract LHCb 3-03/01/2012 in the framework of the PN-II, Module III: Capacități program (2011-2015) within the frame of the Romania-CERN collaboration, the project PNCDI III/Program5/Subprogram 5.2/Modul CERN-RO/LHCb – studiul productiei de hadroni, fizica aromelor pentru particule masive si programul de upgrade and project PN-II-ID-PCE-2011-3-074 from program IDEI (2011-2016).