TRR 9:  Computational Particle Physics

• Subject Area: Physics
• Term: from 2003 to 2014
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 5485680

• Final Report Year: 2016

Final Report Abstract

In recent years, computational physics has been established as an independent field of research. Theoretical particle physics, in particular, has profited from the development of computer-based techniques. In turn, the challenges provided by complex particle physics phenomena have led to new developments in computational physics. The two central themes of the CRC/TR 9 “Computational Particle Physics”, the perturbative calculation of particle physics observables using computer algebra and the numerical simulation of quantum field theories on the lattice, are outstanding examples of such an interplay. The rapid increase in computer resources and substantial algorithmic improvements have considerably extended the research prospects in theoretical particle physics. Including, for example, dynamical fermions in lattice simulations allows to predict observables, like transition matrix elements or particle spectra, with unprecedented precision. On the other hand, computer algebra has offered the opportunity to perform automated perturbative calculations at high loop orders, both for inclusive observables like masses and couplings, and for complex scattering processes at high-energy colliders. The CRC/TR 9 has achieved two main goals: on the one hand, general methods for perturbative quantum field theory and lattice gauge theories have been developed and combined in a novel way. On the other hand, calculational and mathematical tools have been established and advanced, and have been used to derive a large number of important predictions for low-energy precision physics and for high-energy collider experiments, in particular the Large Hadron Collider (LHC). In combination, these results have contributed, and will continue to contribute, to the determination of fundamental particle physics parameters with unprecedented accuracy and possibly to the identification of completely new phenomena.

Publications

• “QCD factorization for B → P P and B → P V decays,” Nucl. Phys. B 675 (2003) 333
  M. Beneke and M. Neubert
  (See online at https://doi.org/10.1016/j.nuclphysb.2003.09.026)
• “Monte Carlo errors with less errors,” Comput. Phys. Commun. 156 (2004) 143 [Erratum: Comput. Phys. Commun. 176 (2007) 383]
  U. Wolff [ALPHA Collaboration]
  (See online at https://doi.org/10.1016/S0010-4655(03)00467-3 https://doi.org/10.1016/j.cpc.2006.12.001)
• “The Three loop splitting functions in QCD: The Nonsinglet case,” Nucl. Phys. B 688 (2004) 101
  S. Moch, J. A. M. Vermaseren and A. Vogt
  (See online at https://doi.org/10.1016/j.nuclphysb.2004.03.030)
• “Computation of the strong coupling in QCD with two dynamical flavors,” Nucl. Phys. B 713 (2005) 378
  M. Della Morte et al. [ALPHA Collaboration]
  (See online at https://doi.org/10.1016/j.nuclphysb.2005.02.013)
• “Non-perturbative quark mass renormalization in two-flavor QCD,” Nucl. Phys. B 729 (2005) 117
  M. Della Morte et al. [ALPHA Collaboration]
  (See online at https://doi.org/10.1016/j.nuclphysb.2005.09.028)
• “On lattice actions for static quarks,” JHEP 0508 (2005) 051
  M. Della Morte, A. Shindler and R. Sommer
  (See online at https://doi.org/10.1088/1126-6708/2005/08/051)
• “The Four-loop QCD beta-function and anomalous dimensions,” Nucl. Phys. B 710 (2005) 485
  M. Czakon
  (See online at https://doi.org/10.1016/j.nuclphysb.2005.01.012)
• “HMC algorithm with multiple time scale integration and mass preconditioning,” Comput. Phys. Commun. 174 (2006) 87
  C. Urbach, K. Jansen, A. Shindler and U. Wenger
  (See online at https://doi.org/10.1016/j.cpc.2005.08.006)
• “Next-to-leading order QCD corrections to W+W- production via vector-boson fusion,” JHEP 0607 (2006) 015
  B. Jäger, C. Oleari and D. Zeppenfeld
  (See online at https://doi.org/10.1103/PhysRevD.75.073004)
• “ZFITTER: A Semi-analytical program for fermion pair production in e+ e- annihilation, from version 6.21 to version 6.42,” Comput. Phys. Commun. 174 (2006) 728
  A. B. Arbuzov, M. Awramik, M. Czakon, A. Freitas, M. W. Grunewald, K. M¨onig, S. Riemann and T. Riemann
  (See online at https://doi.org/10.1016/j.cpc.2005.12.009)
• “Dynamical twisted mass fermions with light quarks,” Phys. Lett. B 650 (2007) 304
  P. Boucaud et al. [ETM Collaboration]
  (See online at https://doi.org/10.1016/j.physletb.2007.04.054)
• “Estimate of B(anti-B → X(s) gamma) at O(αs2),” Phys. Rev. Lett. 98 (2007) 022002
  M. Misiak et al.
  (See online at https://doi.org/10.1103/PhysRevLett.98.022002)
• “Heavy Quark Masses from Sum Rules in Four-Loop Approximation,” Nucl. Phys. B 778 (2007) 192
  J. H. Kühn, M. Steinhauser and C. Sturm
  (See online at https://doi.org/10.1016/j.nuclphysb.2007.04.036)
• “NNLO QCD corrections to the anti-B → X(s) gamma matrix elements using interpolation in m(c),” Nucl. Phys. B 764 (2007) 62
  M. Misiak and M. Steinhauser
  (See online at https://doi.org/10.1016/j.nuclphysb.2006.11.027)
• “Algorithm FIRE – Feynman Integral REduction,” JHEP 0810 (2008) 107
  A. V. Smirnov
  (See online at https://doi.org/10.1088/1126-6708/2008/10/107)
• “Dynamical Twisted Mass Fermions with Light Quarks: Simulation and Analysis Details,” Comput. Phys. Commun. 179 (2008) 695
  P. Boucaud et al. [ETM Collaboration]
  (See online at https://doi.org/10.1016/j.cpc.2008.06.013)
• “High-Precision Charm-Quark Mass from Current-Current Correlators in Lattice and Continuum QCD,” Phys. Rev. D 78 (2008) 054513
  I. Allison et al. [HPQCD Collaboration]
  (See online at https://doi.org/10.1103/PhysRevD.78.054513)
• “Order α4(s) QCD Corrections to Z and tau Decays,” Phys. Rev. Lett. 101 (2008) 012002
  P. A. Baikov, K. G. Chetyrkin and J. H. Kühn
  (See online at https://doi.org/10.1103/PhysRevLett.101.012002)
• “Theoretical status and prospects for top-quark pair production at hadron colliders,” Phys. Rev. D 78 (2008) 034003
  S. Moch and P. Uwer
  (See online at https://doi.org/10.1103/PhysRevD.78.034003)
• “Charm and Bottom Quark Masses: An Update,” Phys. Rev. D 80 (2009) 074010
  K. G. Chetyrkin, J. H. Kühn, A. Maier, P. Maierhofer, P. Marquard, M. Steinhauser and C. Sturm
  (See online at https://doi.org/10.1103/PhysRevD.80.074010)
• “Measuring the running top-quark mass,” Phys. Rev. D 80 (2009) 054009
  U. Langenfeld, S. Moch and P. Uwer
  (See online at https://doi.org/10.1103/PhysRevD.80.054009)
• “On the generalized eigenvalue method for energies and matrix elements in lattice field theory,” JHEP 0904 (2009) 094
  B. Blossier, M. Della Morte, G. von Hippel, T. Mendes and R. Sommer
  (See online at https://doi.org/10.1088/1126-6708/2009/04/094)
• “Pseudoscalar decay constants of kaon and D-mesons from Nf = 2 twisted mass Lattice QCD,” JHEP 0907 (2009) 043
  B. Blossier et al. [ETM Collaboration]
  (See online at https://doi.org/10.1088/1126-6708/2009/07/043)
• “Softgluon resummation for squark and gluino hadroproduction,” JHEP 0912 (2009) 041
  W. Beenakker, S. Brensing, M. Krämer, A. Kulesza, E. Laenen and I. Niessen
  (See online at https://doi.org/10.1088/1126-6708/2009/12/041)
• “VBFNLO: A Parton level Monte Carlo for processes with electroweak bosons,” Comput. Phys. Commun. 180 (2009) 1661
  K. Arnold et al.
  (See online at https://doi.org/10.1016/j.cpc.2009.03.006)
• “Distributions and correlations for top quark pair production and decay at the Tevatron and LHC.,” Nucl. Phys. B 837 (2010) 90
  W. Bernreuther and Z. G. Si
  (See online at https://doi.org/10.1016/j.nuclphysb.2010.05.001)
• “Finite top quark mass effects in NNLO Higgs boson production at LHC,” JHEP 1002 (2010) 025
  A. Pak, M. Rogal and M. Steinhauser
  (See online at https://doi.org/10.1007/JHEP02(2010)025)
• “Light hadrons from lattice QCD with light (u,d), strange and charm dynamical quarks,” JHEP 1006 (2010) 111
  R. Baron et al.
  (See online at https://doi.org/10.1007/JHEP06(2010)111)
• “Light Meson Physics from Maximally Twisted Mass Lattice QCD,” JHEP 1008 (2010) 097
  R. Baron et al. [ETM Collaboration]
  (See online at https://doi.org/10.1007/JHEP08(2010)097)
• “Light MSSM Higgs boson mass to three-loop accuracy,” JHEP 1008 (2010) 104
  P. Kant, R. V. Harlander, L. Mihaila and M. Steinhauser
  (See online at https://doi.org/10.1007/JHEP08(2010)104)
• “Soft radiation in heavy-particle pair production: All-order colour structure and two-loop anomalous dimension,” Nucl. Phys. B 828 (2010) 69
  M. Beneke, P. Falgari and C. Schwinn
  (See online at https://doi.org/10.1016/j.nuclphysb.2009.11.004)
• “Supersymmetric top and bottom squark production at hadron colliders,” JHEP 1008 (2010) 098
  W. Beenakker, S. Brensing, M. Kr¨amer, A. Kulesza, E. Laenen and I. Niessen
  (See online at https://doi.org/10.1007/JHEP08(2010)098)
• “The 3, 4, and 5-flavor NNLO Parton Distribution Functions from Deep-Inelastic-Scattering Data and at Hadron Colliders,” Phys. Rev. D 81 (2010) 014032
  S. Alekhin, J. Blümlein, S. Klein and S. Moch
  (See online at https://doi.org/10.1103/PhysRevD.81.014032)
• “The Multithreaded version of FORM,” Comput. Phys. Commun. 181 (2010) 1419
  M. Tentyukov and J. A. M. Vermaseren
  (See online at https://doi.org/10.1016/j.cpc.2010.04.009)
• “HATHOR: HAdronic Top and Heavy quarks crOss section calculatoR,” Comput. Phys. Commun. 182 (2011) 1034
  M. Aliev, H. Lacker, U. Langenfeld, S. Moch, P. Uwer and M. Wiedermann
  (See online at https://doi.org/10.1016/j.cpc.2010.12.040)
• “First Glimpses at Higgs’ face,” JHEP 1212 (2012) 045
  J. R. Espinosa, C. Grojean, M. Mühlleitner and M. Trott
  (See online at https://doi.org/10.1007/JHEP12(2012)045)
• “NMSSM Higgs Benchmarks Near 125 GeV,” Nucl. Phys. B 860 (2012) 207
  S. F. King, M. Mühlleitner and R. Nevzorov
  (See online at https://doi.org/10.1016/j.nuclphysb.2012.02.010)
• “Parton Distribution Functions and Benchmark Cross Sections at NNLO,” Phys. Rev. D 86 (2012) 054009
  S. Alekhin, J. Blümlein and S. Moch
  (See online at https://doi.org/10.1103/PhysRevD.86.054009)
• “The strange quark mass and Lambda parameter of two flavor QCD,” Nucl. Phys. B 865 (2012) 397
  P. Fritzsch, F. Knechtli, B. Leder, M. Marinkovic, S. Schaefer, R. Sommer and F. Virotta
  (See online at https://doi.org/10.1016/j.nuclphysb.2012.07.026)
• “Total Top-Quark Pair-Production Cross Section at Hadron Colliders Through O(αs4),” Phys. Rev. Lett. 110 (2013) 252004
  M. Czakon, P. Fiedler and A. Mitov
  (See online at https://doi.org/10.1103/PhysRevLett.110.252004)