Merging meets matching in MC@NLO - INSPIRE

DataBETA

Merging meets matching in MC@NLO

Rikkert Frederix
(
- Zurich U.
)
,
Stefano Frixione
(
- ITPP, Lausanne and
- CERN
)

Sep, 2012

40 pages

Published in:

JHEP 12 (2012) 061

e-Print:

1209.6215 [hep-ph]

DOI:

10.1007/JHEP12(2012)061

Report number:

CERN-PH-TH-2012-247,
ZU-TH-21-12

Experiments:

MC@NLO

View in:

reference search1,266 citations

Citations per year

Abstract: (arXiv)

The next-to-leading order accuracy for MC@NLO results exclusive in J light jets is achieved if the computation is based on matrix elements that feature J and J+1 QCD partons. The simultaneous prediction of observables which are exclusive in different light-jet multiplicities cannot simply be obtained by summing the above results over the relevant range in J; rather, a suitable merging procedure must be defined. We address the problem of such a merging, and propose a solution that can be easily incorporated into existing MC@NLO implementations. We use the automated aMC@NLO framework to illustrate how the method works in practice, by considering the production at the 8 TeV LHC of a Standard Model Higgs in association with up to J=2 jets, and of an e\nu_e pair or a t\bar{t} pair in association with up to J=1 jet.

Note:

40 pages, 14 figures

NLO
Monte Carlo
higher-order: 1
top: pair production
quantum chromodynamics: perturbation theory
jet: multiplicity
p p: exclusive reaction
Higgs particle: hadroproduction
neutrino/e: hadroproduction
positron: hadroproduction

References(83)

Figures(56)

[1]

A Simple prescription for first order corrections to quark scattering and annihilation processes

Michael H. Seymour
(
- Lund U.
)

- Nucl.Phys.B 436 (1995) 443-460
•
e-Print:
- hep-ph/9410244
•
DOI:
- 10.1016/0550-3213(94)00554-R

[2]

Matrix element corrections to parton shower algorithms

Michael H. Seymour
(
- Lund U.
)

- Comput.Phys.Commun. 90 (1995) 95-101
•
e-Print:
- hep-ph/9410414
•
DOI:
- 10.1016/0010-4655(95)00064-M

[3]

Coherent Parton Showers Versus Matrix Elements: Implications of PETRA - PEP Data

- Phys.Lett.B 185 (1987) 435
•
DOI:
- 10.1016/0370-2693(87)91031-8

[4]

Dipole Formulation of QCD Cascades

Gosta Gustafson
(
- Lund U.
)
,
Ulf Pettersson
(
- Lund U.
)

- Nucl.Phys.B 306 (1988) 746-758
•
DOI:
- 10.1016/0550-3213(88)90441-5

[5]

$W$ production in an improved parton shower approach

- Phys.Lett.B 449 (1999) 313-320
•
e-Print:
- hep-ph/9812455
•
DOI:
- 10.1016/S0370-2693(99)00068-4

[6]

QCD matrix elements + parton showers

S. Catani
(
- CERN
)
,
F. Krauss
(
- Cambridge U.
)
,
R. Kuhn
(
- Dresden, Tech. U. and
- Dresden, Max Planck Inst.
)
,
B.R. Webber
(
- Cambridge U.
)

- JHEP 11 (2001) 063
•
e-Print:
- hep-ph/0109231
•
DOI:
- 10.1088/1126-6708/2001/11/063

[7]

Matrix elements and parton showers in hadronic interactions

F. Krauss
(
- Dresden, Tech. U.
)

- JHEP 08 (2002) 015
•
e-Print:
- hep-ph/0205283
•
DOI:
- 10.1088/1126-6708/2002/08/015

[8]

Correcting the color dipole cascade model with fixed order matrix elements

Leif Lonnblad
(
- Lund U.
)

- JHEP 05 (2002) 046
•
e-Print:
- hep-ph/0112284
•
DOI:
- 10.1088/1126-6708/2002/05/046

[9]

W+jets matrix elements and the dipole cascade

- JHEP 07 (2005) 054
•
e-Print:
- hep-ph/0503293
•
DOI:
- 10.1088/1126-6708/2005/07/054

[10]

QCD matrix elements and truncated showers

- JHEP 05 (2009) 053
•
e-Print:
- 0903.1219
•
DOI:
- 10.1088/1126-6708/2009/05/053

[11]

A Modified CKKW matrix element merging approach to angular-ordered parton showers

Keith Hamilton
(
- Louvain U., CP3
)
,
Peter Richardson
(
- Durham U., IPPP
)
,
Jon Tully
(
- Durham U., IPPP
)

- JHEP 11 (2009) 038
•
e-Print:
- 0905.3072
•
DOI:
- 10.1088/1126-6708/2009/11/038

[12]

Matching Tree-Level Matrix Elements with Interleaved Showers

Leif Lonnblad
(
- Lund U., Dept. Theor. Phys.
)
,
Stefan Prestel
(
- CERN
)

- JHEP 03 (2012) 019
•
e-Print:
- 1109.4829
•
DOI:
- 10.1007/JHEP03(2012)019

[13]

Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions

et al.

- Eur.Phys.J.C 53 (2008) 473-500
•
e-Print:
- 0706.2569
•
DOI:
- 10.1140/epjc/s10052-007-0490-5

[14]

Incorporating next-to-leading order matrix elements for hadronic diboson production in showering event generators

Matt Dobbs
(
- Victoria U.
)

- Phys.Rev.D 64 (2001) 034016
•
e-Print:
- hep-ph/0103174
•
DOI:
- 10.1103/PhysRevD.64.034016

[15]

Matching NLO QCD computations and parton shower simulations

Stefano Frixione
(
- Annecy, LAPP
)
,
Bryan R. Webber
(
- Cambridge U.
)

- JHEP 06 (2002) 029
•
e-Print:
- hep-ph/0204244
•
DOI:
- 10.1088/1126-6708/2002/06/029

[16]

NLO corrections in MC event generator for angular distribution of Drell-Yan lepton pair production

- JHEP 04 (2002) 041
•
e-Print:
- hep-ph/0110257
•
DOI:
- 10.1088/1126-6708/2002/04/041

[17]

QCD event generators with next-to-leading order matrix elements and parton showers

et al.

- Nucl.Phys.B 654 (2003) 301-319
•
e-Print:
- hep-ph/0212216
•
DOI:
- 10.1016/S0550-3213(03)00057-9

[18]

A New method for combining NLO QCD with shower Monte Carlo algorithms

Paolo Nason
(
- INFN, Milan
)

- JHEP 11 (2004) 040
•
e-Print:
- hep-ph/0409146
•
DOI:
- 10.1088/1126-6708/2004/11/040

[19]

Matching parton showers to NLO computations

Zoltan Nagy
(
- Zurich U.
)
,
Davison E. Soper
(
- Oregon U.
)

- JHEP 10 (2005) 024
•
e-Print:
- hep-ph/0503053
•
DOI:
- 10.1088/1126-6708/2005/10/024

[20]

Event Generation from Effective Field Theory

Christian W. Bauer
(
- LBL, Berkeley and
- UC, Berkeley
)
,
Matthew D. Schwartz
(
- LBL, Berkeley and
- UC, Berkeley
)

- Phys.Rev.D 76 (2007) 074004
•
e-Print:
- hep-ph/0607296
•
DOI:
- 10.1103/PhysRevD.76.074004

[21]

Parton showers with quantum interference

Zoltan Nagy
(
- CERN
)
,
Davison E. Soper
(
- Oregon U.
)

- JHEP 09 (2007) 114
•
e-Print:
- 0706.0017
•
DOI:
- 10.1088/1126-6708/2007/09/114

[22]

A simple shower and matching algorithm

- Phys.Rev.D 78 (2008) 014026
•
e-Print:
- 0707.3652
•
DOI:
- 10.1103/PhysRevD.78.014026

[23]

GenEvA. I. A New framework for event generation

Christian W. Bauer
(
- LBL, Berkeley
)
,
Frank J. Tackmann
(
- LBL, Berkeley
)
,
Jesse Thaler
(
- LBL, Berkeley
)

- JHEP 12 (2008) 010
•
e-Print:
- 0801.4026
•
DOI:
- 10.1088/1126-6708/2008/12/010

[24]

Extending CKKW-merging to One-Loop Matrix Elements

- JHEP 12 (2008) 070
•
e-Print:
- 0811.2912
•
DOI:
- 10.1088/1126-6708/2008/12/070

[25]

Automating the POWHEG method in Sherpa

Stefan Hoche
(
- Zurich U.
)
,
Frank Krauss
(
- Durham U., IPPP and
- CERN
)
,
Marek Schonherr
(
- Dresden, Tech. U.
)
,
Frank Siegert
(
- Durham U., IPPP and
- University Coll. London
)

- JHEP 04 (2011) 024
•
e-Print:
- 1008.5399
•
DOI:
- 10.1007/JHEP04(2011)024

1-25 of 83
1
2
3
4
25 / page