Multijet merging in a variable flavor number scheme

Höche, Stefan; Krause, Johannes; Siegert, Frank

doi:10.1103/PhysRevD.100.014011

Title: Multijet merging in a variable flavor number scheme

Abstract

We introduce a novel technique for the combination of multijet merged simulations in the five-flavor scheme with calculations for the production of b-quark associated final states in the four-flavor scheme. We show the equivalence of our algorithm to the FONLL approach at the fixed-order and logarithmic accuracy inherent to the matrix-element and parton-shower simulation employed in the multijet merging. As a first application, we discuss $$Zb\bar{b}$$ production at the Large Hadron Collider.

Authors:: Höche, Stefan; Krause, Johannes; Siegert, Frank

Publication Date:: Mon Jul 01 00:00:00 EDT 2019

Research Org.:: Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)

Sponsoring Org.:: USDOE Office of Science (SC), High Energy Physics (HEP)

OSTI Identifier:: 1532791

Alternate Identifier(s):: OSTI ID: 1545093

Report Number(s):: arXiv:1904.09382; FERMILAB-PUB-19-148-T; MCNET-19-07
Journal ID: ISSN 2470-0010; PRVDAQ; 014011

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Published Article

Journal Name:: Physical Review. D.

Additional Journal Information:: Journal Name: Physical Review. D. Journal Volume: 100 Journal Issue: 1; Journal ID: ISSN 2470-0010

Publisher:: American Physical Society (APS)

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Höche, Stefan, Krause, Johannes, and Siegert, Frank. Multijet merging in a variable flavor number scheme.  United States: N. p., 2019. 
Web.  doi:10.1103/PhysRevD.100.014011.

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                    Höche, Stefan, Krause, Johannes, & Siegert, Frank. Multijet merging in a variable flavor number scheme.  United States.  https://doi.org/10.1103/PhysRevD.100.014011

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                    Höche, Stefan, Krause, Johannes, and Siegert, Frank. Mon .  
"Multijet merging in a variable flavor number scheme".  United States.  https://doi.org/10.1103/PhysRevD.100.014011.

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@article{osti_1532791,

  title        = {Multijet merging in a variable flavor number scheme},

  author       = {Höche, Stefan and Krause, Johannes and Siegert, Frank},

  abstractNote = {We introduce a novel technique for the combination of multijet merged simulations in the five-flavor scheme with calculations for the production of b-quark associated final states in the four-flavor scheme. We show the equivalence of our algorithm to the FONLL approach at the fixed-order and logarithmic accuracy inherent to the matrix-element and parton-shower simulation employed in the multijet merging. As a first application, we discuss $Zb\bar{b}$ production at the Large Hadron Collider.},

  doi          = {10.1103/PhysRevD.100.014011},

  journal      = {Physical Review. D.},

  number       = 1,

  volume       = 100,

  place        = {United States},

  year         = {Mon Jul 01 00:00:00 EDT 2019},

  month        = {Mon Jul 01 00:00:00 EDT 2019}

}

Copy to clipboard

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Figures / Tables:

FIG. 1: Representative parton-shower histories for gg → Zbb̄ (a) and qq̄ → Zbb̄ (b) matrix-element configurations. The gray blobs correspond to the irreducible core processes.

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Ossola, Giovanni; Papadopoulos, Costas G.; Pittau, Roberto
Journal of High Energy Physics, Vol. 2008, Issue 03
DOI: 10.1088/1126-6708/2008/03/042

Higgs radiation off bottom quarks at the Fermilab Tevatron and the CERN LHC
journal, October 2004

Dittmaier, Stefan; Krämer, Michael; Spira, Michael
Physical Review D, Vol. 70, Issue 7
DOI: 10.1103/PhysRevD.70.074010

QCD matrix elements + parton showers. The NLO case
journal, April 2013

Höche, Stefan; Krauss, Frank; Schönherr, Marek
Journal of High Energy Physics, Vol. 2013, Issue 4
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Lepton-pair production in association with a b b ¯ $$ b\overline{b} $$ pair and the determination of the W boson mass
journal, July 2018

Bagnaschi, Emanuele; Maltoni, Fabio; Vicini, Alessandro
Journal of High Energy Physics, Vol. 2018, Issue 7
DOI: 10.1007/JHEP07(2018)101

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Title: Multijet merging in a variable flavor number scheme

Abstract

Citation Formats

Figures / Tables:

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Electroweak gauge boson parton distribution functions journal, May 2018

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Merging multi-leg NLO matrix elements with parton showers journal, March 2013

Measurement of the production cross section of jets in association with a Z boson in pp collisions at $ \sqrt{s}=7 $ TeV with the ATLAS detector journal, July 2013

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Comix, a new matrix element generator journal, December 2008

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W and Z/γ ∗ boson production in association with a bottom-antibottom pair journal, September 2011

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journal, May 1998

Evolution of parton densities beyond leading order
journal, November 1980

Search for the standard model Higgs boson produced in association with top quarks and decaying into a $b \bar{b}$ pair in $p p$ collisions at $\sqrt{s} = 13 TeV$ with the ATLAS detector
journal, April 2018

Matching NLO QCD computations and parton shower simulations
journal, June 2002

LHAPDF6: parton density access in the LHC precision era
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Observation of Higgs Boson Decay to Bottom Quarks
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Variable-flavor number scheme for next-to-next-to-leading order
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Leptoproduction of heavy quarks. I. General formalism and kinematics of charged current and neutral current production processes
journal, September 1994

Scattering Amplitudes with Open Loops
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Reweighting QCD matrix-element and parton-shower calculations
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OneLOop: For the evaluation of one-loop scalar functions
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Multijet matrix elements and shower evolution in hadronic collisions: -jets as a case study
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Parton distributions for the LHC run II
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Uncertainties in MEPS@NLO calculations of $h + jets$
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journal, April 2002

Comparative study of various algorithms for the merging of parton showers and matrix elements in hadronic collisions
journal, December 2007

A treatment of hard processes sensitive to the infrared structure of QCD
journal, October 1980

Electroweak and QCD corrections to $Z$ -boson production with one $b$ jet in a massive five-flavor scheme
journal, November 2018

Associated production of a $W$ boson and one $b$ jet
journal, February 2009

Electroweak gauge-boson production in association with b jets at Hadron Colliders
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Next-to-leading order QCD predictions for $W + 1$ jet and $W + 2$ jet production with at least one $b$ jet at the 7 TeV LHC
journal, August 2012

QCD Matrix Elements + Parton Showers
journal, November 2001

Electroweak gauge boson parton distribution functions
journal, May 2018

Event generation with SHERPA 1.1
journal, February 2009

Momentum conservation and unitarity in parton showers and NLL resummation
journal, January 2018

Dipole showers and automated NLO matching in Herwig++
journal, November 2012

Merging multi-leg NLO matrix elements with parton showers
journal, March 2013

Measurement of the production cross section of jets in association with a Z boson in pp collisions at $ \sqrt{s}=7 $ TeV with the ATLAS detector
journal, July 2013

The midpoint between dipole and parton showers
journal, September 2015

Matching NLO QCD computations with parton shower simulations: the POWHEG method
journal, November 2007

New NLOPS predictions for $$\varvec{t \bar{t} +b}$$ t t ¯ + b -jet production at the LHC
journal, June 2018

Merging meets matching in MC@NLO
journal, December 2012

Some dipole shower studies
journal, March 2018

Merging NLO multi-jet calculations with improved unitarization
journal, March 2018

A multiple-interaction model for the event structure in hadron collisions
journal, October 1987

NLO QCD matrix elements + parton showers in e+e− → hadrons
journal, January 2013

QCD coherent branching and semi-inclusive processes at large χ
journal, February 1991

Correcting the Colour-Dipole Cascade Model with Fixed Order Matrix Elements
journal, May 2002

Leading-color fully differential two-loop soft corrections to QCD dipole showers
journal, October 2018

Leptoproduction of heavy quarks. II. A unified QCD formulation of charged and neutral current processes from fixed-target to collider energies
journal, September 1994

General-purpose event generators for LHC physics
journal, July 2011

Standard Model parton distributions at very high energies
journal, August 2017

Hybrid scheme for heavy flavors: Merging the fixed flavor number scheme and variable flavor number scheme
journal, October 2013

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journal, August 2002

Merging parton showers and matrix elements—back to basics
journal, April 2008

Matched predictions for the b b ¯ H $$ b\overline{b}H $$ cross section at the 13 TeV LHC
journal, October 2016

Simulating $b$ -associated production of $Z$ and Higgs bosons with the Sherpa event generator
journal, February 2017

Measurements of the associated production of a Z boson and b jets in pp collisions at $${\sqrt{s}} = 8\,\text {TeV} $$ s = 8 TeV
journal, November 2017

Triple collinear emissions in parton showers
journal, October 2017

Towards a fully massive five-flavor scheme
journal, November 2018

$W$ - and $Z$ -boson production with a massive bottom-quark pair at the Large Hadron Collider
journal, August 2009

Polarization effects in standard model parton distributions at very high energies
journal, March 2019

Z boson production in bottom-quark fusion: a study of b-mass effects beyond leading order
journal, November 2018

A modified CKKW matrix element merging approach to angular-ordered parton showers
journal, November 2009

Higgs production in bottom-quark fusion in a matched scheme
journal, December 2015

Rivet user manual
journal, December 2013

A New Method for Combining NLO QCD with Shower Monte Carlo Algorithms
journal, November 2004

Exclusive Higgs boson production with bottom quarks at hadron colliders
journal, April 2004

Observation of $H \to b \bar{b}$ decays and VH production with the ATLAS detector
journal, November 2018

QCD radiation off heavy particles
journal, June 2001

Singlet parton densities beyond leading order
journal, December 1980

Comix, a new matrix element generator
journal, December 2008

Space- and time-like cut vertices in QCD beyond the leading order—The singlet sector
journal, January 1981

Matching of matrix elements and parton showers
journal, May 1998

Resummation and matching of b-quark mass effects in b b ¯ H $$ b\overline{b}H $$ production
journal, November 2015

A parton shower algorithm based on Catani-Seymour dipole factorisation
journal, March 2008

W and Z/γ ∗ boson production in association with a bottom-antibottom pair
journal, September 2011

3-, 4-, and 5-flavor next-to-next-to-leading order parton distribution functions from deep-inelastic-scattering data and at hadron colliders
journal, January 2010

Asymptotic freedom in parton language
journal, August 1977

Ordered analysis of heavy flavor production in deep-inelastic scattering
journal, June 1998

AMEGIC++ 1.0, A Matrix Element Generator In C++
journal, February 2002

Matching tree-level matrix elements with interleaved showers
journal, March 2012

Herwig 7.0/Herwig++ 3.0 release note
journal, April 2016

Inclusive $B$ -meson production at the LHC in the general-mass variable-flavor-number scheme
journal, November 2011

An introduction to PYTHIA 8.2
journal, June 2015

Charm electroproduction viewed in the variable-flavour number scheme versus fixed-order perturbation theory
journal, March 1998

Two-loop anomalous dimension in light-cone gauge with Mandelstam-Leibbrandt prescription
journal, May 1998

Observation of $t \bar{t} H$ Production
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Pileup subtraction using jet areas
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