Photographer: Ruud Claessen

dr. W.J. (Wouter) Waalewijn


  • Faculty of Science
    ITF
  • Visiting address
    Science Park A
    Science Park 904  Amsterdam
    Room number: C4.109
  • Postal address:
    Postbus  94485
    1090 GL  Amsterdam
  • W.J.Waalewijn@uva.nl
    T: 0205255773

The Large Hadron Collider (LHC) is at the heart of the worldwide effort to uncover the fundamental laws of physics. After the highly successful Run 1, with as climax the Nobel prize winning discovery of the Higgs boson, the hunt for Beyond-the-Standard Model physics has resumed at even higher energies. My research focusses on QCD aspects of LHC collisions. An introduction to why and how QCD is important for the LHC, is presented in my national seminar.

My main research themes are:

  • Developing and studying observables to characterize collisions
  • Improving theoretical predictions

with the aim of uncovering new physics. Much of my work focusses on jets, which are sprays of energetic collimated hadrons (see image). They are copiously produced at the LHC and play a crucial role in many analyses. To describe these intrinsically multi-scale processes, I use effective field theory.

Some of my contributions are:

  • The N-Jettiness observable, which provides a theoretically clean definition of an event with N jets. It is used to handle the cancellation of infrared divergences in precision (NNLO) calculations. At the LHC it has also been succesfully used as jet substructure, to identify hadronic decays of heavy particles (e.g. top quarks), which could prove crucial in uncovering a faint new physics signal. 
  • The first precision calculation of  Higgs+0 jets. Many LHC analyses bin events by the number of jets, to improve the signal sensitivity, which typically dominates the theory uncertainty.
  • A precision calculation of the invariant mass spectrum of jets, an important benchmark jet substructure observable.
  • A study of LHC applications of the electric charge of a jet and its calculation.

A full list of my publications can be viewed on Inspire.

A Two Jet Event - ATLAS Experiment © 2013 CERN

After studying physics and mathematics at Utrecht University, I went on to obtain a PhD at MIT and was a postdoc at UC San Diego. I started as a junior faculty member at the UvA in 2013 and am also affiliated with the Nikhef theory group. I have ongoing collaborations with colleagues at various institutions, including MIT, DESY, Berkeley, LANL, UCSD and CERN.

When I am not doing physics, I enjoy reading, hiking, traveling and of course spending time with my lovely wife and children.

Massachusetts Institute of Technology (from Prudential sky walk)

Sunset in California

Back in the Netherlands

Research group

  • Jort Damste (PhD student)
  • Gillian Lustermans (PhD student)
  • Andreas Papaefstathiou (postdoc)
  • Lisa Zeune (postdoc)
  • Lorenzo Zoppi (PhD student)

Grants

  • ERC Starting Grant (2016-2021)
  • MISTI Global Seed Fund (2015-2016)
  • Marie Curie Fellowship (2013-2015)
  • Fulbright (2005-2006)
  • NWO Talentenprogramma (2005-2006)
  • VSBFonds (2005-2006)
  • NFAA award (2005)

2016

  • Lustermans, G., Waalewijn, W. J., & Zeune, L. (2016). Joint transverse momentum and threshold resummation beyond NLL. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 762, 447-454. DOI: 10.1016/j.physletb.2016.09.060 [details]
  • Kasemets, T., Waalewijn, W. J., & Zeune, L. (2016). Calculating soft radiation at one loop. The Journal of High Energy Physics, 2016(3), [153]. DOI: 10.1007/JHEP03(2016)153 [details] [PDF]
  • Kolodrubetz, D. W., Pietrulewicz, P., Stewart, I. W., Tackmann, F. J., & Waalewijn, W. J. (2016). Factorization for jet radius logarithms in jet mass spectra at the LHC. The Journal of High Energy Physics, 2016(12), [54]. DOI: 10.1007/JHEP12(2016)054 [details] [PDF]
  • Pietrulewicz, P., Tackmann, F. J., & Waalewijn, W. J. (2016). Factorization and resummation for generic hierarchies between Jets. The Journal of High Energy Physics, 2016(8), [2]. DOI: 10.1007/JHEP08(2016)002 [details] [PDF]
  • Tackmann, F. J., Waalewijn, W. J., & Zeune, L. (2016). Impact of jet veto resummation on slepton searches. The Journal of High Energy Physics, 2016(7), [119]. DOI: 10.1007/JHEP07(2016)119 [details] [PDF]

2015

  • Waalewijn, W. J. (2015). Dissecting Soft Radiation with Factorization. In K. Kutak, R. Maciula, M. Moraes, & A. Szczurek (Eds.), Proceedings of the 6th International Workshop on Multiple Partonic Interactions at the LHC: 3-7 November, 2014 Kraków, Poland. (pp. 42). Krakow: Polish Academy of Arts and Science. [details] [PDF]
  • Adams, D., et al., . U., & Waalewijn, W. (2015). Towards an understanding of the correlations in jet substructure: Report of BOOST2013, hosted by the University of Arizona, 12th-16th of August 2013. European Physical Journal C, 75(9), [409]. DOI: 10.1140/epjc/s10052-015-3587-2 [details] [PDF]
  • Moult, I., Stewart, I. W., Tackmann, F. J., & Waalewijn, W. J. (2015). Employing Helicity Amplitudes for Resummation. Physical Review D. Particles, Fields, Gravitation, and Cosmology, 93(9), [094003]. DOI: 10.1103/PhysRevD.93.094003 [details]
  • Procura, M., Waalewijn, W. J., & Zeune, L. K. (2015). Resummation of double-differential cross sections and fully-unintegrated parton distribution functions. The Journal of High Energy Physics, 2015(2), [117]. DOI: 10.1007/JHEP02(2015)117 [details] [PDF]
  • Stewart, I. W., Tackmann, F. J., & Waalewijn, W. J. (2015). Dissecting Soft Radiation with Factorization. Physical Review Letters, 114(9), [092001]. DOI: 10.1103/PhysRevLett.114.092001 [details] [PDF]

2014

  • Jenkins, A. E., Manohar, A. V., Waalewijn, W. J., & Yadav, A. P. S. (2014). Gravitational Lensing of the CMB: a Feynman Diagram Approach. Physics Letters B, 736, 6-10. DOI: 10.1016/j.physletb.2014.07.002 [details] [PDF]
  • Jenkins, E. E., Manohar, A. V., Waalewijn, W. J., & Yadav, A. P. S. (2014). Higher-Order Gravitational Lensing Reconstruction using Feynman Diagrams. Journal of Cosmology and Astroparticle Physics, 2014, 024. DOI: 10.1088/1475-7516/2014/09/024 [details]
  • Larkoski, A. J., Thaler, J., & Waalewijn, W. J. (2014). Gaining (Mutual) Information about Quark/Gluon Discrimination. The Journal of High Energy Physics, 2014(11), 129. DOI: 10.1007/JHEP11(2014)129 [details] [PDF]
  • Ritzmann, M., & Waalewijn, W. J. (2014). Fragmentation in Jets at NNLO. Physical Review D. Particles, Fields, Gravitation, and Cosmology, 90, 054029. DOI: 10.1103/PhysRevD.90.054029 [details / files]
This list of publications is extracted from the UvA-Current Research Information System. Questions? Ask the library or the Pure staff of your faculty / institute. Log in to Pure to edit your publications.
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