Christian Bierlich
Researcher, IT administrator
Research
My research work revolves mainly around Monte Carlo simulation of hadronic collisions, and collisions of heavy ions. Mainly using the general purpose Monte Carlo event generator PYTHIA, of which I am a co-author. I am mainly interested in cases for collisions of "small systems", meaning for example protons, behave like collisions of heavy nuclei. In these cases the collisions exhibit so-called "collective behavior", where the emerging particles act as if they are produced by a single body of matter. The calculations used to describe this, involves multibody dynamics of Lund strings.
Outreach
I write popular articles on physics, in the magazine "Science Illustrated", see the literature list below. I am furthermore topic responsible for several sub-topics of high energy physics on the Danish National Encyclopedia. I also give the occasional outreach talk, contact me if you are interested.
IT
I am responsible for several parts of the department IT infrastructure, relating to login system, maintaining workstations, local cluster, webpage etc. Feel free to drop me an email or come by my office if you have questions or problems.
Publications
Displaying of publications. Sorted by year, then title.
Towards a data-driven model of hadronization using normalizing flows
Christian Bierlich, Phil Ilten, Tony Menzo, Stephen Mrenna, Manuel Szewc, et al.
(2024) SciPost Physics, 17
Journal articleReweighting Monte Carlo predictions and automated fragmentation variations in Pythia 8
Christan Bierlich, Philip Ilten, Tony Menzo, Stephen Mrenna, Manuel Szewc, et al.
(2024) SciPost Physics, 16
Journal articleThe dynamic hadronization of charm quarks in heavy-ion collisions
Christian Bierlich, Gösta Gustafson, Leif Lönnblad, Harsh Shah
(2024) European Physical Journal C, 84
Journal articleString Interactions as a Source of Collective Behaviour
Christian Bierlich
(2024) Universe, 10
Journal article reviewEvent generators for high-energy physics experiments
J.M. Campbell, C. Bierlich, S. Chakraborty, R. Frederix, L. Gellersen, et al.
(2024) SciPost Physics, 16
Journal articleStrangeness enhancement across collision systems without a plasma
Christian Bierlich, Smita Chakraborty, Gösta Gustafson, Leif Lönnblad
(2022) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 835
Journal articleJet modifications from colour rope formation in dense systems of non-parallel strings
Christian Bierlich, Smita Chakraborty, Gösta Gustafson, Leif Lönnblad
(2022) SciPost Physics, 13
Journal articleHyperfine splitting effects in string hadronization
Christian Bierlich, Leif Lönnblad, Gösta Gustafson, Smita Chakraborty
(2022) European Physical Journal C. Particles and Fields
Journal articleA comprehensive guide to the physics and usage of PYTHIA 8.3
Christian Bierlich, Smita Chakraborty, Nishita Desai, Leif Gellersen, Ilkka Helenius, et al.
(2022) SciPost Physics
Journal articleMultiparton interactions and underlying event : A PYTHIA perspective
Christian Bierlich
(2021) Proceedings of Science, 387
Conference paperHadronic rescattering in pA and AA collisions
Marius Utheim, Christian Bierlich, Torbjorn Sjostrand
(2021) European Physical Journal A
Journal articleSetting the string shoving picture in a new frame
Christian Bierlich, Smita Chakraborty, Gösta Gustafson, Leif Lönnblad
(2021) Journal of High Energy Physics
Journal articleAntistof kan sende fysikken i frit fald
Christian Bierlich
(2021) Illustreret Videnskab, 2021
Journal articleConfronting experimental data with heavy-ion models : Rivet for heavy ions
Christian Bierlich, Andy Buckley, Christian Holm Christensen, Peter Harald Lindenov Christiansen, Cody B. Duncan, et al.
(2020) European Physical Journal C, 80
Journal articleNovel tools and observables for jet physics in heavy-ion collisions
Harry Arthur Andrews, Liliana Apolinario, Redmer Alexander Bertens, Christian Bierlich, Matteo Cacciari, et al.
(2020) Journal of Physics G: Nuclear and Particle Physics, 47
Journal articleQCD challenges from pp to A–A collisions
J. Adolfsson, A. Andronic, C. Bierlich, P. Bozek, S. Chakraborty, et al.
(2020) European Physical Journal A, 56
Journal article reviewKvantemikrofon hører verdens mindste lyde
Christian Bierlich
(2020) Illustreret Videnskab, 2020
Journal articleRobust independent validation of experiment and theory : RIVET version 3
Christian Bierlich, Andy Buckley, Jonathan Butterworth, Christian Holm Christensen, Louie Corpe, et al.
(2020) SciPost Physics, 8
Journal articleMicroscopic collectivity : The ridge and strangeness enhancement from string–string interactions
Christian Bierlich
(2019) Nuclear Physics A, 982 p.499-502
Journal articleSoft modifications to jet fragmentation in high energy proton–proton collisions
Christian Bierlich
(2019) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 795 p.194-199
Journal articleStudying the Effect of the Hadronic Phase in Nuclear Collisions with PYTHIA and UrQMD
Christian Bierlich, André Vieira da Silva, D. D. Chinellato, Jun Takahashi
(2019) SQM 2019, 319-323
Conference paperDipole evolution: perspectives for collectivity and γ*A collisions
Christian Bierlich, Christine Rasmussen
(2019) Journal of High Energy Physics
Journal articleUltrapræcist atomur skal måle Jordens vægt
Christian Bierlich
(2019) Illustreret Videnskab, 2019
Journal articleCollectivity without plasma in hadronic collisions
Christian Bierlich, Gösta Gustafson, Leif Lönnblad
(2018) Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 779 p.58-63
Journal articleRope Hadronization and Strange Particle Production
Christian Bierlich
(2018) 17th International Conference on Strangeness in Quark Matter, SQM 2017, 171
Conference paperThe Angantyr model for heavy-ion collisions in Pythia8
Christian Bierlich, Gösta Gustafson, Leif Lönnblad, Harsh Shah
(2018) Journal of High Energy Physics, 2018
Journal articleFuture physics opportunities for high-density QCD at the LHC with heavy-ion and proton beams
Christian Bierlich, Y. Zhou
(2018) Future physics opportunities for high-density QCD at the LHC with heavy-ion and proton beams
Conference paperNu kan vi teleportere data ud i rummet
Christian Bierlich
(2018) Illustreret Videnskab, 2018
Journal articleMultiparton interactions : From pp to pA
Christian Bierlich
(2017) Nuclear and Particle Physics Proceedings, 289-290 p.377-380
Journal articleRope Hadronization, Geometry and Particle Production in pp and pA Collisions
Christian Bierlich
(2016)
DissertationDiffractive and non-diffractive wounded nucleons and final states in pA collisions
Christian Bierlich, Gösta Gustafson, Leif Lönnblad
(2016) Journal of High Energy Physics, 2016
Journal articleHadronisation models and colour reconnection
Christian Bierlich
(2016) Proceedings of Science, 11
Conference paperA shoving model for collectivity in hadronic collisions
Christian Bierlich, Gösta Gustafson, Leif Lönnblad
(2016) arXiv.org, 1612
Journal articleForskere fanger ekko fra sorte huller : Hvad er der inden i et sort hul?
Christian Bierlich
(2016) Illustreret Videnskab, 2016
Journal articleEffects of overlapping strings in pp collisions
Christian Bierlich, Gösta Gustafson, Leif Lönnblad, Andrey Tarasov
(2015) Journal of High Energy Physics
Journal articleEffects of color reconnection on hadron flavor observables
Christian Bierlich, Jesper Roy Christiansen
(2015) Physical Review D (Particles, Fields, Gravitation and Cosmology), 92
Journal article