Quantum Chromodynamics at Work (QWORK)
ERC 2012 Advanced Grant Project -- PI: P.J. Mulders (VU University)
This research project (No 320389) is part of the Seventh Framework "Ideas" Programme of the
European Research Council.
Content
Plan
Quantum Chromodynamics (QCD) is one of the cornerstones of the Standard Model of particle
physics. It describes the world of quarks, anti-quarks and gluons (partons) making up the protons
and neutrons and therewith the ordinary matter in our universe. Collisions of protons and heavy
nuclei at unprecedented energies in the Large Hadron Collider (LHC) at CERN enable experiments
that will uncover mechanisms and symmetries underlying the Standard Model. In experiments at the
LHC, as in many other high-energy physics experiments, QCD plays a crucial role as a toolbox. It
employs the property that at very high energies, or equivalently very short distances, the transition
of protons to partons is a long distance phenomenon that can be encoded through parton
probabilities and decay functions, which incorporate the complex structure of the proton itself.
Earlier I have revealed a new element in QCD: specific momentum-spin correlations can also be
encoded in terms of (polarized) parton probabilities, collectively known as transverse momentum
dependent (TMD) distribution and fragmentation functions. Experimental results have confirmed
the applicability and the necessity of including the novel correlations in QCD in order to cope with
current and upcoming experimental results. This proposal outlines my ambitions to develop the next
generation of the QCD toolbox.
I want to break with the restrictions of the collinear approximation for partons in high-energy
processes and develop the full QCD dynamics underlying the novel correlations, study their
universality and make them into workable tools that enable a full manipulation of spins and
momenta of the partons for understanding experimental results at all frontiers, energy and precision.
The results of this enterprise will affect the entire field of high-energy/nuclear physics and open up
new windows to reveal the fundaments of the Standard Model through dedicated experiments at
present-day and future facilities.
A description of the programme in context is available
here,
while there is also the more detailed
workplan.
(Piet Mulders, 2012)
Researchers involved in the Programme
- P.J. Mulders [PI], 01-05-2013 - 01-05-2018
- Maarten Buffing [PhD student]. 01-12-2014 - 01-09-2015
- Sabrina Cotogno [PhD student], 01-10-2014 - 01-05-2018
- Tom van Daal [PhD student, supervision shared with Daniel Boer (RUG, Groningen)], 20-10-2014 - 01-05-2018
- Cristian Pisano [Postdoctoral Associate], 01-06-2013 - 01-01-2015
- Tomas Kasemets [Postdoctoral Associate], 01-09-2012 - 01-09-2017
- Jian Zhou [Postdoctoral Associate], 01-10-2014 - 01-10-2016
- Jonathan Gaunt [Postdoctoral Associate], 01-10-2015 - 01-10-2017
- Elena Petreska [Postdoctoral Associate], 01-10-2016 - 01-10-2018
Collaborators and Visitors in the Programme QWORK
- Daniel Boer (RU Groningen)
- Asmita Mukherjee (Indian Institute of Technology, Mumbai)
- Jai More (Mumbai University)
- Tom Mertens (University Antwerp)
- Paul Hoyer (University of Helsinki)
- Alessandro Bacchetta (University of Pavia)
- Stephane Peigne (Ecole Polytechnique, Paris)
- Ahmad Idilbi (Penn State University)
- Emanuele Nocera (University of Torino)
- Wilco den Dunnen (University of Tubingen)
- Jianwei Qiu (Brookhaven National Laboratory)
- George Sterman (Stony Brook)
- Markus Diehl (DESY, Hamburg), May 2015
- Asmita Mukherjee (Indian Institute of Technology, Mumbai), May & June 2015
- Andreas Metz (Penn State, USA), June 2015
- Yajin Zhou (Shandong University), Sep 2015 - July 2016
- Asmita Mukherjee (Indian Institute of Technology, Mumbai), May & June 2016
- Matthias Ritzmann (Zuerich), August 2016
- Markus Diehl (DESY), June 2017
- Asmita Mukherjee (Indian Institute of Technology, Mumbai), July 2017
- Philippo Delcarro (Pavia), Feb - Mar 2018
- Asmita Mukherjee (Indian Institute of Technology, Mumbai), June - July 2018
Publications
Journals
- M.G.A. Buffing, A. Mukherjee and P.J. Mulders,
Generalized Universality of Definite Rank Gluon Transverse Momentum Dependent Correlators,
arXiv:1306.5897 [hep-ph],
Phys. Rev. D 88 (2013) 054027
- C. Pisano, D. Boer, S.J. Brodsky, M.G.A. Buffing and P.J. Mulders,
Linear polarization of gluons and photons in unpolarized collider experiments,
arXiv:1307.3417 [hep-ph],
JHEP 10 (2013) 024
- W.J. den Dunnen, J-P. Lansberg, C. Pisano and M. Schlegel
Accessing the transverse dynamics and polarization of gluons inside the proton at the LHC,
arXiv:1401.7611 [hep-ph],
Phys. Rev. Lett. 112 (2014) 212001
- M. Diehl, T. Kasemets and S. Keane
Correlations in double parton distributions: effects of evolution,
arXiv:1401.1233 [hep-ph],
JHEP 5 (2014) 118)
- M.G.A. Buffing and P.J. Mulders,
Color entanglement for azimuthal asymmetries in the Drell-Yan process,
arXiv:1309.4681 [hep-ph],
Phys. Rev. Lett. 112, 09002 (2014)
- F. Hautmann, H. Jung, M. Kramer, E.R. Nocera, T.C. Rogers, A. Signori,
TMDlib and TMDplotter: library and plotting tools for transverse-momentum-dependent parton distributions - version 1.0.0,
arXiv:1408.3015 [hep-ph],
EPJ C74 (2014) 3220
- Tomas Kasemets and Piet J. Mulders,
Constraining double parton correlations and interferences,
arXiv:1411.0726 [hep-ph],
Phys. Rev. D91 (2015) 014015
- Miguel G. Echevarria, Tomas Kasemets, Piet J. Mulders and Cristian Pisano,
Polarization effects in double open-charm production at LHCb,
arXiv:1501.07291 [hep-ph],
JHEP 1504 (2015) 034
- Jian Zhou,
Transverse single spin asymmetry in Drell-Yan production in polarized pA collisions ,
arXiv:1502.02457 [hep-ph],
Phys. Rev. D92 (2015) 014034
- Miguel G. Echevarria, Tomas Kasemets, Piet J. Mulders and Cristian Pisano,
QCD evolution of (un)polarized gluon TMDPDFs and the Higgs q_T-distribution,
arXiv:1502.05354 [hep-ph],
JHEP 1507 (2015) 158
- D. Boer, M.G.A. Buffing and P.J. Mulders,
Operator analysis of pT-widths of TMDs,
arXiv:1503.03760 [hep-ph],
JHEP 1508 (2015) 053
- Alessandro Bacchetta, Miguel G. Echevarria, Piet J.G. Mulders, Marco Radici, Andrea Signori.
Effects of TMD evolution and partonic flavor on e^+e^- annihilation into hadrons
arXiv:1508.00402 [hep-ph],
JHEP 1511 (2015) 076
- Jian Zhou,
Note on the scale dependence of the Burkardt sum rule,
arXiv:1507.02819 [hep-ph],
JHEP 1510 (2015) 014
- Wim Beenakker, Tom van Daal, Ronald Kleiss, Rob Verheyen,
Renormalization group invariants in supersymmetric theories: one- and two-loop results,
arXiv:1507.03470 [hep-ph],
JHEP 1510 (2015) 014
- M. Diehl, J. R. Gaunt, D. Ostermeier, P. Ploessl, A. Schafer,
Cancellation of Glauber gluon exchange in the double Drell-Yan process,
arXiv:1510.08696 [hep-ph],
JHEP 1510 (2015) 014
- Daniël Boer, Miguel G. Echevarria, Piet J. Mulders, Jian Zhou.
Single spin asymmetries from a single Wilson loop,
arXiv:1511.03485 [hep-ph],
Proceedings
- P.J. Mulders, M.G.A. Buffing and A. Mukherjee,
Universality of TMD distribution functions,
Proceedings of 21st International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2013), 22-26 Apr 2013. Marseilles, France,
arXiv:1306.6513 [hep-ph],
- M.G.A. Buffing,P.J. Mulders and A. Mukherjee,
Universality of Quark and Gluon TMD Correlators,
Proceedings of QCD Evolution Workshop (QCD2013), May 2013, JLAB, Newport News, USA
arXiv:1309.2472 [hep-ph],
Int. J. Mod. Phys. Conf. Ser. 25 (2014) 1460003
- P.J. Mulders and M.G.A. Buffing,
Wilson Lines off the Light-cone in TMD PDFs,
Proceedings of the "Lightcone 2013" workshop, May 20-24 2013, Skiathos, Greece,
Few-Body Syst 55 (2014), DOI 10.1007/s00601-014-0843-1
arXiv:1404.0222 [hep-ph],
- M.G.A. Buffing, A. Mukherjee and P.J. Mulders,
Universality of TMD Correlators,
Proceedings of the 4th International Workshop on Transverse Polarization Phenomena in Hard Processes
(Transversity 2014), 9-13 Jun 2014, Cagliari, Italy
arXiv:1409.7257 [hep-ph],
- T. Kasemets
Scale evolution of double parton correlators,
Proceedings of the QCD Evolution Workshop (QCD2014), 20-24 May 2104, Santa Fe, USA,
Int. J. Mod. Phys. Conf. Ser., 37 (2015) 1560044 (8 p)
arXiv:1411.4469 [hep-ph],
- M.G.A. Buffing and P.J. Mulders,
Color entanglement in hadronic processes for transverse momentum dependent parton distribution functions,
Proceedings of the QCD Evolution Workshop (QCD2014), 20-24 May 2104, Santa Fe, USA,
DOI: 10.1142/S2010194515600228,
Int. J. Mod. Phys. - Conf. Ser., 37 (2015) 1560022 (8 p)
- M.G.A. Buffing and P.J. Mulders,
Color effects for transverse momentum dependent parton distribution functions,
Proceedings of the Conference on Theory and Experiment for Hadrons on the Light-Front (Light Cone 2014),
26-30 May 2014, Raleigh, USA
arXiv:1410.6345 [hep-ph],
- C. Pisano,
Probing the transverse dynamics and polarization of gluons inside the proton at the LHC,
Proceedings of 49th Rencontred de Moriond, QCD and High Energy Interactions,
22-29 March 2014, La Thuile (Italy)
arXiv:1406.0525 [hep-ph],
- R. Angeles-Martinez et al.,
Transverse momentum dependent (TMD) parton distribution functions: status and prospects,
arXiv:1507.05267 [hep-ph],
Acta Physica Polonica B 46 (2015) 2501
- Miguel G. Echevarria, Tomas Kasemets, Piet J. Mulders and Cristian Pisano,
Scale evolution of gluon TMDPDFs,
EPJ Web Conf. 85 (2015) 02005,
4th International Workshop on Transverse Polarization Phenomena in Hard Processes (Transversity 2014), 09-13 Jun 2014. Cagliari, Italy
- Tomas Kasemets,
Transverse Momentum Dependent (Un)polarized Gluon Distributions in Higgs Production,
arXiv:1508.02532[hep-ph],
23rd International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2015), 27 Apr - 01 May 2015. Dallas, Texas, United States
- Tomas Kasemets,
Polarization in double parton scattering,
arXiv:1508.02530[hep-ph],
23rd International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2015), 27 Apr - 01 May 2015. Dallas, Texas, United States
- P.J. Mulders,
Operator structure of TMDs,
arXiv:1510.05871 [hep-ph],
23rd International Workshop on Deep-Inelastic Scattering and Related Subjects (DIS 2015), 27 Apr - 01 May 2015. Dallas, Texas, United States
- P.J. Mulders,
The 3D structure of QCD and the roots of the Standard Model,
Preprint: Nikhef 2015-42, EPJ Web Conf. nn (2016) pp,
Invited contribution at 6th International Conference on Physics Opportunities of Electron-Ion collider (POETIC 6), Sep 7 - 11, 2015, Ecole Polytechnique, Palaiseau, France,
- P.J. Mulders,
The roots of the standard model of particle physics,
Preprint: Nikhef 2016-01,
arXiv:1601.00300 [hep-ph]
Other (including outreach)
Meetings/Workshops/Conferences (organizational involvement through project)
- Workshop on Noncommutative Geometry and Particle Physics, 14-18 October 2013, Lorentz Center, Leiden
- TMD/uPDF Workshop, 23-24 June 2014, University of Antwerp
- Resummation, Evolution and Factorization (REF) Workshop, 8-11 December 2014, University of Antwerp
- Resummation, pre-REF Meeting 2015, 1-3 June 2015, Nikhef, Amsterdam
- QCD Evolution 2016, 30 May - 3 June 2016, Nikhef, Amsterdam
P.J. Mulders / p.j.g.mulders@vu.nl