• Ilse Krätschmer

    Location: HEPHY, 215
    Phone: +43 1 5447328 - 34

Research interests

My main research interest are strong interactions, in particular the understanding of bound state formation by studying quarkonium production. I work on measurements of quarkonium cross sections and polarizations using data collected with the CMS detector at the LHC. In this context, I have also accumulated great expertise on single muon and dimuon efficiencies using dimuon triggers at low transverse momentum. Through my position as CMS B-physics production subgroup convener, I am also involved in the analyses of b hadron production and properties. Recently, I expanded my research to include phenomenological studies of quarkonium production at the LHC, placing the emphasis on the data instead of theoretical input.

Biographical sketch

Research experience:

  • since Sept. 2015          Postdoc at HEPHY
  • Jun. 2012 - Aug. 2015 Research at HEPHY for doctoral thesis on
                                          "Measurements of prompt J/$\psi$ and $\psi$(2S) production and polarization at CMS"
  • 2010 - 2012                  Several short-time projects for CNGS at CERN
  • summer 2010              Summer student at CNGS at CERN


  • 2012 - 2015 Doctoral studies in Engineering Science at the University of Technology Vienna
  • 2005 - 2012 Study of technical physics at the University of Technology Vienna



Austrian Science Fund project "Measurement of quarkonium production to probe QCD at the LHC" (P28411-N36) running from 2015 to 2019

Awards and scholarships

Nucelar Physics B/Physics Letter B Young Scientist Award (2nd prize) awarded for the best poster "Muon reconstruction and identification in CMS Run I and towards Run II" at the 37th International Conference on High Energy Physics in Valencia 2014

Award for the most artistic poster "Towards the Measurement of Quarkonium Polarization" at the CMS Physics Week in Brussels  2011

Scholarship for distinguished achievements by the University of Technology Vienna in 2007


Co-supervision of students:

  • Thomas Madlener: PhD student since Jan.2016
  • Jakob Necker: Master student finishing in Oct. 2018
  • Johannes Brandstetter (obtained Master's degree in Nov.2014)
  • Ahmed El-Saied Gommaa (obtained bachelor degree in 2017)

Outreach activities

  • Assistance for various events (CMS masterclasses, conferences, etc.)
  • Guided tours through nhm exhibition "The beginning of everything. About galaxies, quarks and collisions" in 2016-2017

Selected publications

From identical S- and P-wave pT spectra to maximally distinct polarizations: probing NRQCD with χ states

Pietro Faccioli, Carlos Lourenço, Mariana Araújo, João Seixas, Ilse Krätschmer, Valentin Knünz, Eur.Phys.J. C78 (2018) no.3, 268

Quarkonium production at the LHC: A data-driven analysis of remarkably simple experimental patterns

Pietro Faccioli, Carlos Lourenço, Mariana Araújo, Valentin Knünz, Ilse Krätschmer, João Seixas, Phys.Lett. B773 (2017) 476-486

Production of $\eta_c$, $\chi_c$ and $\chi_b$ Mesons in Proton–(Anti)Proton Collisions

Ilse Krätschmer, Few Body Syst. 58 (2017) no.2, 101

Measurement of J/ψ and ψ(2S) Prompt Double-Differential Cross Sections in pp Collisions at $\sqrt{s}$=7  TeV

CMS Collaboration, Phys.Rev.Lett. 114 (2015) 191802

Measurement of the prompt $J/\psi$ and $\psi$(2S) polarizations in $pp$ collisions at $\sqrt{s}$ = 7 TeV

CMS Collaboration, Phys.Lett. B727 (2013) 381-402

Measurement of the $Y(1S), Y(2S)$ and $Y(3S)$ polarizations in $pp$ collisions at $\sqrt{s}=7$ TeV

CMS Collaboration, Phys.Rev.Lett. 110 (2013) 081802

Selected presentations

Universität Graz, Graz, Austria

Quarkonium production at the LHC - A polarized perspective (Seminarvortrag), 17-05-17

Humboldt Kolleg on particle physics, Kitzbühel, Austria

Quarkonium production at the LHC: A polarized perspective, 28-06-16

ECT* Workshop: New Observables in Quarkonium Production, Trento, Italy

Experimental review of $\eta_c$, $\chi_c$ and $\chi_b$ production in pp collisions, 29-02-16

QDC@LHC 2016, Zürich, Switzerland

Recent results on heavy quarks in pp collisions with CMS (Konferenzvortrag), 25-08-16

New Possibilities in Physics of Quarkonia, Paris, France

Prospects of quarkonium physics with the CMS experiment, 25-09-15

European Physical Society - Conference on High Energy Physics 2015, Vienna, Austria

Quarkonium and heavy flavour production in Run I and first results with 13 TeV data at CMS (Konferenzvortrag), 23-07-15