CTEQ

QT resummation portal

at Michigan State University
A collection of resources on transverse momentum resummation
Online plotter of resummed cross sections |Home |Theory overview|Computer programs and usage policy|Particle processes|Our  publications|Bibliography
CTEQ6.6 grids for W, Z, H, and di-boson pair productions; ResBos with PDF reweighting and output into ROOT ntuples using FROOT
Some sample input files for various processes can be found here.

Online Plotter of ResBos

Download the latest resummation code (Fortran)
*ResBos (C,  P , CP versions)
*ResBos-A
*RhicBos
*ResBos for SIDIS
     Why different versions?

Processes
*p P -> W X
*p P->Z0 X
*p P->A0 X
*p P -> Higgs X
*p P -> Higgs(SUSY) X
*p P -> AA X
*p P -> ZZ X
|SIDIS
*DIS heavy-quark production

Transverse momentum (or QT) resummation is a powerful method to predict differential distributions of elementary particles in quantum chromodynamics. Its main features and differences from Monte-Carlo showering methods are discussed in the brief overview of resummation theory. Our group is actively involved in the development of  transverse momentum resummation methods in essential collider processes. This page collects various resources for computation of resummed cross  sections, including publicly distributed computer codes, references to journal papers published by our group, and relevant bibliography.


Computer programs

A quick plot of the resummed QT distribution for a given invariant mass and rapidity can be made with the help of the online plotter of resummed cross sections, which provides an intuitive user interface and produces figures in Postscript and GIF formats. For more detailed studies of resummed cross sections, a ResBos family of Fortran programs is publicly available.
  • ResBos -- calculation of resummed initial-state contributions  in unpolarized Drell-Yan-like processes at hadron-hadron colliders. At present, two branches of the ResBos code are supported. They are mostly compatible with one another, but optimized for different tasks:
  • ResBos-A -- a program spawned by ResBos that includes final-state NLO electromagnetic contributions in W boson production, supported by C.-P. Yuan. The inputs for this program are not compatible with ResBos inputs and can be downloaded here. More grid files are available below.
  • RhicBos -- ResBos optimized for polarized hadron-hadron collisions at the Relativistic Heavy Ion Collider; supported by Pavel Nadolsky.
  • ResBos-DIS -- a program for computation of resummed hadronic distributions in semi-inclusive deep inelastic scattering at lepton-hadron colliders; supported by Pavel Nadolsky.
You can also contact  C.-P. Yuan  and our coauthors regarding the resummation calculations and computer programs.

Usage and citation policy

You may freely download and use the ResBos software as long as you agree with each of the following conditions:
  • the ResBos software is provided AS IS; the authors of ResBos programs cannot be held responsible for errors, damages, or other unwanted consequences resulting from misunderstanding or misuse of our programs (even though we do our best to prevent such complications from ever happening);
  • the authors do not provide support for the ResBos software beyond very brief consultations, and only when their other duties permit;
  • your publications that use ResBos results must include references to our relevant papers, including each of the following:
    •  articles with calculations for the considered process listed  in  the table below, hopefully all of them, but at the very least those printed in the bold font;
    • references [1, 20] describing the program Legacy which computes the resummed input grids;
    • references to the parametrization of the nonperturbative Sudakov function  and parton distribution function specified in the description of each resummed grid.

Observables

ResBos programs compute the fully differential cross section d(sigma)/(dQdydQTd(Omega)) for processes h1 h2 -> (V)-> l1 l2 X, where  h1 and h2 are hadrons (pion or nucleons), V is an intermediate virtual particle or state (e.g., a virtual electroweak boson), and l1 and l2 are observed electroweak particles (leptons, prompt photons, or Z bosons).  Q, QT, and y are the invariant mass, transverse momentum, and rapidity of the intermediate state V in the laboratory frame (center-of-mass frame of the initial hadrons). Omega is the solid angle of the 3-momentum of l1  in the Collins-Soper rest frame of V. The production and decay of V are evaluated using exact matrix elements. Electroweak corrections to the width of V and spin correlations between the initial- and final-state particles are included when applicable.

Particle processes

The table summarizes implemented particle processes and computer codes needed for computation of resummed cross sections.

PLEASE READ THE USAGE AND CITATION POLICY BEFORE DOWNLOADING THE GRIDS!

Hadron-hadron collisions
|W and Z boson production (p P -> W X and p P->Z0 X)
Order of calculation
or topic of the study		 Executable
and its versions
 Input grids Authorship of grids References
Resummed NNLL/NLO QCD ResBos (C, P, CP)
(description)		 General purpose grids:
Tevatron Run-1 (C.B., P.N.), Run-2 (C.B., P.N., C.-P.), LHC (C.B., P.N., C.-P.), RHIC ( P.N.), other energies (C.B.) 		C. Balazs
P. Nadolsky
C.-P. Yuan 		[1,2,3,4,20,25]
Resummed nonperturbative functions with uncertainties (evaluated in the Hessian matrix method)
 ResBos (P)
 General purpose grids: Tevatron Run-2, LHC A. Konychev,
P. Nadolsky 		[25]
rapidity-dependent correction at small x ResBos (P) Developmental grids: Tevatron Run-2, LHC
 S. Berge,
P. Nadolsky 		[24]
Parametrizations of nonperturbative resummed functions


[1,10,20,25]
Heavy-quark mass corrections; effect on MW measurement


[26]
Resummed NNLL/NLO QCD
+NLO electroweak corrections
 ResBos-A
(1.1, 1.0)
(description)

 General purpose grids: v1.1 and v1.0 Q.-H. Cao [23]
Resummed NNLL QCD for polarized
hadron-hadron collisions
 RhicBos
(description)
 General purpose grids for single-spin and double-spin cross sections P. Nadolsky
 [21, 22]

|Low-mass Drell-Yan pair production (p P->A0 X)
Order of calculation Executable
and its versions		 Input grids Authorship of grids References
Resummed NLL/NLO QCD ResBos (C, P)
(description)		  General purpose grids for
the Tevatron Run-2, LHC, other energies
 C. Balazs
 [1-3, 4, 20]

|Standard model Higgs boson production (p P->Z0 X)
Order of calculation Executable
and its versions		 Input grids Authorship of grids References
Resummed NNLL/NLO QCD ResBos (C, P, CP)
(description)		  General purpose grids for
the Tevatron Run-2 (C.B., C.-P.), LHC (C.B., C.-P.)
C. Balazs
C.-P. Yuan 		[10, 14, 31]

|Supersymmetric Higgs boson production (p P->Higgs (SUSY) X)
Order of calculation Executable
and its versions		 Input grids Authorship of grids References
Resummed NNLL/NLO QCD
for Higgs production in b-quark
scattering		 ResBos (C, P)
(description)		  General purpose grids for the LHC
C. Balazs
 [9, 26, 27]

|Photon pair production (p P->AA X)
Order of calculation Executable
and its versions		 Input grids Authorship of grids References
Resummed NNLL/NLO QCD ResBos (P, CP)
(description)		  General purpose grids and matching scripts for the Tevatron Run-2 (P.N., C.-P.), LHC; explanation P. Nadolsky
C.-P. Yuan 		[5,8,19,28-30]

|Z-boson pair production (p P->ZZ X)
Order of calculation Executable
and its versions		 Input grids Authorship of grids References
Resummed NLL/NLO QCD ResBos (C, CP)
(description)

  General purpose grids for LHC
C. Balazs
C.-P. Yuan 		[7]

Electron-proton collisions
|Semi-inclusive production of light hadrons in deep-inelastic scattering (e p -> e h X)
Order of calculation and type of observable Executable
 Input grids
& sample output (PAW)
 Authorship of grids References
Resummed NLL/NLO QCD

Cross sections and transverse energy flows		 ResBos-DIS Grids, hbooks for transverse energy flow
 P. Nadolsky [11, 15]
Azimuthal asymmetries ResBos-DIS Grids, hbooks for transverse energy flow P. Nadolsky [16]
|Production of heavy quarks in deep-inelastic scattering
Type of calculation Executable
 Input grids Authorship of grids References
Resummed NLL/NLO QCD


[18]

Our publications

  1. The nonperturbative regime in QCD resummation for gauge boson production at hadron colliders.
    By G.A. Ladinsky & C.-P. Yuan.
    Phys.Rev.D50:4239,1994. [hep-ph/9311341]
  2. Effects of QCD resummation on distributions of leptons from the decay of electroweak vector bosons.
    By Csaba Balazs, Jian-wei Qiu, C.-P. Yuan.
    Phys.Lett.B355:548-554,1995. [hep-ph/9505203]
  3. Testing multiple gluon dynamics at the Tevatron.
    By C. Balazs & C.-P. Yuan.
    Phys.Rev.Lett.79:2398-2401,1997. [hep-ph/9703405]
  4.  Soft gluon effects on lepton pairs at hadron colliders.
    By C. Balazs & C.-P. Yuan.
    Phys.Rev.D56:5558-5583,1997. [hep-ph/9704258]
  5. Photon pair production with soft gluon resummation in hadronic interactions.
    By C. Balazs, E.L. Berger, S. Mrenna, C.-P. Yuan.
    Phys.Rev.D57:6934-6947,1998. [hep-ph/9712471]
  6. kT effects in direct photon production.
    By L. Apanasevich, et al.,
    Phys.Rev.D59:074007,1999. [hep-ph/9808467]
  7.  Higgs boson production at hadron colliders with soft gluon effects. 1. Backgrounds.
    By C. Balazs & C.-P. Yuan.
    Phys.Rev.D59:114007,1999,Erratum-ibid.D63: 059902,2001. [hep-ph/9810319]
  8. Diphoton background to Higgs boson production at the LHC with soft gluon effects.
    By C. Balazs, P. Nadolsky, C. Schmidt, C.-P. Yuan.
    Phys.Lett.B489:157-162,2000. [hep-ph/9905551]
  9. QCD corrections to scalar production via heavy quark fusion at hadron colliders.
    By Csaba Balazs, Hong-Jian He, C.-P. Yuan.
    Phys.Rev.D60:114001,1999. [hep-ph/9812263]
  10. Higgs production: A Comparison of parton showers and resummation.
    By C. Balazs, J. Huston, I. Puljak.
    Phys.Rev.D63:014021,2001. [hep-ph/0002032]
  11. Semiinclusive hadron production at HERA: The Effect of QCD gluon resummation.
    By P. Nadolsky, D.R. Stump, C.-P. Yuan.
    Phys.Rev.D61:014003,2000,Erratum-ibid.D64: 059903,2001. [hep-ph/9906280]
  12. New fits for the nonperturbative parameters in the CSS resummation formalism.
    By F. Landry, R. Brock, G. Ladinsky, C.-P. Yuan.
    Phys.Rev.D63:013004,2001,Phys.Rev.D63:013004, 2001. [hep-ph/9905391]
  13. Soft gluon effects on electroweak boson production in hadron collisions.
    Csaba Balazs, Ph. D. thesis.
    [hep-ph/9906422] CTEQ-906 (Jun 1999) 270p.
  14. Higgs boson production at the LHC with soft gluon effects.
    By C. Balazs & C.-P. Yuan.
    Phys.Lett.B478:192-198,2000. [hep-ph/0001103]
  15. Phenomenology of multiple parton radiation in semiinclusive deep inelastic scattering.
    By P.M. Nadolsky, D.R. Stump, C.-P. Yuan.
    Phys.Rev.D64:114011,2001. [hep-ph/0012261]
  16. Azimuthal asymmetries at HERA: Theoretical aspects.
    By P.M. Nadolsky, D.R. Stump, C.-P. Yuan.
    Phys.Lett.B515:175-180,2001. [hep-ph/0012262]
  17. Multiple parton radiation in hadroproduction at lepton hadron colliders.
    By Pavel M. Nadolsky. Ph. D. thesis.
    [hep-ph/0108099] CTEQ-108 (Aug 2001) 148p.
  18. Resummation of transverse momentum and mass logarithms in DIS heavy quark production.
    By P.M. Nadolsky, N. Kidonakis, F.I. Olness, C.-P. Yuan.
    Phys.Rev.D67:074015,2003. [hep-ph/0210082]
  19. Diphoton production in gluon fusion at small transverse momentum.
    By P.M. Nadolsky & C.R. Schmidt.
    Phys.Lett.B558:63-68,2003. [hep-ph/0211398]
  20. Tevatron Run-1 Z boson data and Collins-Soper-Sterman resummation formalism.
    By F. Landry, R. Brock, P.M. Nadolsky, C.-P. Yuan.
    Phys.Rev.D67:073016,2003. [hep-ph/0212159]
  21. Soft parton radiation in polarized vector boson production: Theoretical issues.
    By P.M. Nadolsky & C.-P. Yuan.
    Nucl.Phys.B666:3-30,2003. [hep-ph/0304001]
  22. Single spin asymmetries with weak bosons at RHIC.
    By P.M. Nadolsky & C.-P. Yuan.
    Nucl.Phys.B666:31-55,2003. [hep-ph/0304002]
  23.  Combined effect of QCD resummation and QED radiative correction to W boson observables at the Tevatron.
    By Qing-Hong Cao & C.-P. Yuan.
    Phys.Rev.Lett.93:042001,2004. [hep-ph/0401026]
  24. Transverse momentum resummation at small x for the Tevatron and LHC.
    By Stefan Berge, Pavel Nadolsky, Fredrick Olness, C.-P. Yuan.
    Phys.Rev.D72:033015,2005. [hep-ph/0410375]
  25. Universality of the Collins-Soper-Sterman nonperturbative function in gauge boson production.
    By Anton V. Konychev & Pavel M. Nadolsky.
    Phys.Lett.B633:710-714,2006. [hep-ph/0506225]
  26. Heavy-flavor effects in soft gluon resummation for electroweak boson production at hadron colliders.
    By Stefan Berge, Pavel M. Nadolsky, Fredrick I. Olness.
    Phys.Rev.D73:013002,2006. [hep-ph/0509023]
  27.  Transverse momentum resummation for Higgs boson produced via b anti-b fusion at hadron colliders.
    By Alexander Belyaev, Pavel M. Nadolsky, C.-P. Yuan.
    JHEP 0604:004,2006. [hep-ph/0509100]
  28. All-orders resummation for diphoton production at hadron colliders.
    By Csaba Balazs, Edmond L. Berger, Pavel Nadolsky, C.-P. Yuan.
    Phys.Lett.B637:235-240,2006. [hep-ph/0603037]

  29. Calculation of prompt diphoton production cross-sections at Tevatron and LHC energies.
    By C. Balazs, Edmond L. Berger, P.M. Nadolsky, C.- P. Yuan.
    Phys.Rev.D76:013009,2007. [arXiv:0704.0001]

  30.  Gluon-gluon contributions to the production of continuum diphoton pairs at hadron colliders.
    By P. Nadolsky, C. Balazs, Edmond L. Berger, C.-P. Yuan.
    Phys.Rev.D76:013008,2007. [hep-ph/0702003]
  31.  Resummation Effects in the Search of SM Higgs Boson at Hadron Colliders.
    By Qing-Hong Cao and Chuan-Ren Chen.
    Phys.Rev.D76:073006,2007. [arXiv:0909.2305]
  32.  Improved Predictions for Higgs Q_T at the Tevatron and the LHC.
    Qing-Hong Cao, Chuan-Ren Chen, Carl Schmidt, C.-P. Yuan.
    arXiv:0909.2305 [hep-ph]

Additional resources

|Home |Theory overview|Computer programs and usage policy|Particle processes|Our publications|Bibliography


History of modifications