Analytic and Monte Carlo studies of jets with heavy mesons and quarkonia

Bain, Reggie; Dai, Lin; Hornig, Andrew; Leibovich, Adam K.; Makris, Yiannis; Mehen, Thomas

doi:10.1007/JHEP06(2016)121

Title: Analytic and Monte Carlo studies of jets with heavy mesons and quarkonia

Abstract

Here, we study jets with identified hadrons in which a family of jet-shape variables called angularities are measured, extending the concept of fragmenting jet functions (FJFs) to these observables. FJFs determine the fraction of energy, z, carried by an identified hadron in a jet with angularity, τ_a. The FJFs are convolutions of fragmentation functions (FFs), evolved to the jet energy scale, with perturbatively calculable matching coefficients. Renormalization group equations are used to provide resummed calculations with next-to-leading logarithm prime (NLL’) accuracy. We apply this formalism to two-jet events in e⁺e^– collisions with B mesons in the jets, and three-jet events in which a J/ψ is produced in the gluon jet. In the case of B mesons, we use a phenomenological FF extracted from e⁺e^– collisions at the Z0 pole evaluated at the scale μ = mb. For events with J/ψ, the FF can be evaluated in terms of Non-Relativistic QCD (NRQCD) matrix elements at the scale μ = 2m_c. The z and τa distributions from our NLL’ calculations are compared with predictions from monte carlo event generators. While we find consistency between the predictions for B mesons and the J/ψ distributions in τa, we find the z distributions for J/ψmore »« less

Authors:

Bain, Reggie ^[1]; Dai, Lin ^[2]; Hornig, Andrew ^[3]; Leibovich, Adam K. ^[2]; Makris, Yiannis ^[1]; Mehen, Thomas ^[1]

Duke Univ., Durham, NC (United States)
Univ. of Pittsburgh, Pittsburgh, PA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Publication Date:: Tue Jun 21 00:00:00 EDT 2016

Research Org.:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Org.:: USDOE Office of Science (SC)

OSTI Identifier:: 1338802

Report Number(s):: LA-UR-16-21884
Journal ID: ISSN 1029-8479

Grant/Contract Number:: AC52-06NA25396

Resource Type:: Accepted Manuscript

Journal Name:: Journal of High Energy Physics (Online)

Additional Journal Information:: Journal Name: Journal of High Energy Physics (Online); Journal Volume: 2016; Journal Issue: 6; Journal ID: ISSN 1029-8479

Publisher:: Springer Berlin

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; atomic and nuclear physics; jets

Citation Formats


                    Bain, Reggie, Dai, Lin, Hornig, Andrew, Leibovich, Adam K., Makris, Yiannis, and Mehen, Thomas. Analytic and Monte Carlo studies of jets with heavy mesons and quarkonia.  United States: N. p., 2016. 
Web.  doi:10.1007/JHEP06(2016)121.

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                    Bain, Reggie, Dai, Lin, Hornig, Andrew, Leibovich, Adam K., Makris, Yiannis, & Mehen, Thomas. Analytic and Monte Carlo studies of jets with heavy mesons and quarkonia.  United States.  https://doi.org/10.1007/JHEP06(2016)121

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                    Bain, Reggie, Dai, Lin, Hornig, Andrew, Leibovich, Adam K., Makris, Yiannis, and Mehen, Thomas. Tue .  
"Analytic and Monte Carlo studies of jets with heavy mesons and quarkonia".  United States.  https://doi.org/10.1007/JHEP06(2016)121.  https://www.osti.gov/servlets/purl/1338802.

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@article{osti_1338802,

  title        = {Analytic and Monte Carlo studies of jets with heavy mesons and quarkonia},

  author       = {Bain, Reggie and Dai, Lin and Hornig, Andrew and Leibovich, Adam K. and Makris, Yiannis and Mehen, Thomas},

  abstractNote = {Here, we study jets with identified hadrons in which a family of jet-shape variables called angularities are measured, extending the concept of fragmenting jet functions (FJFs) to these observables. FJFs determine the fraction of energy, z, carried by an identified hadron in a jet with angularity, τa. The FJFs are convolutions of fragmentation functions (FFs), evolved to the jet energy scale, with perturbatively calculable matching coefficients. Renormalization group equations are used to provide resummed calculations with next-to-leading logarithm prime (NLL’) accuracy. We apply this formalism to two-jet events in e+e– collisions with B mesons in the jets, and three-jet events in which a J/ψ is produced in the gluon jet. In the case of B mesons, we use a phenomenological FF extracted from e+e– collisions at the Z0 pole evaluated at the scale μ = mb. For events with J/ψ, the FF can be evaluated in terms of Non-Relativistic QCD (NRQCD) matrix elements at the scale μ = 2mc. The z and τa distributions from our NLL’ calculations are compared with predictions from monte carlo event generators. While we find consistency between the predictions for B mesons and the J/ψ distributions in τa, we find the z distributions for J/ψ differ significantly. We describe an attempt to merge PYTHIA showers with NRQCD FFs that gives good agreement with NLL’ calculations of the z distributions.},

  doi          = {10.1007/JHEP06(2016)121},

  journal      = {Journal of High Energy Physics (Online)},

  number       = 6,

  volume       = 2016,

  place        = {United States},

  year         = {Tue Jun 21 00:00:00 EDT 2016},

  month        = {Tue Jun 21 00:00:00 EDT 2016}

}

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SCET approach to top quark decay
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Title: Analytic and Monte Carlo studies of jets with heavy mesons and quarkonia

Abstract

Citation Formats

Comparing and counting logs in direct and effective methods of QCD resummation journal, April 2014

Quark fragmentation within an identified jet journal, April 2010

SCET approach to top quark decay journal, May 2011

Parton fragmentation within an identified jet at NNLL journal, May 2011

Fully-unintegrated parton distribution and fragmentation functions at perturbative k⊥ journal, April 2012

Heavy quark fragmenting jet functions journal, April 2014

Probing quarkonium production mechanisms with jet substructure journal, November 2014

Jet fragmentation functions in proton-proton collisions using soft-collinear effective theory journal, May 2016

Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium journal, February 1995

Event shape–energy flow correlations journal, July 2003

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations journal, July 2014

PYTHIA 6.4 physics and manual journal, May 2006

An introduction to PYTHIA 8.2 journal, June 2015

Herwig++ physics and manual journal, November 2008

Jet shapes and jet algorithms in SCET journal, November 2010

FastJet user manual: (for version 3.0.2) journal, March 2012

Jet shapes in dijet events at the LHC in SCET journal, April 2016

Z 0 decay into charmonium via charm quark fragmentation journal, November 1993

Gluon fragmentation into heavy quarkonium journal, September 1993

Color-Octet Fragmentation and the ψ ′ Surplus at the Fermilab Tevatron journal, April 1995

Helicity decomposition for inclusive J ψ production journal, September 1996

Next-To-Leading Order Tests of Non-Relativistic-Qcd Factorization with j/ψ Yield and Polarization journal, March 2013

Rivet user manual journal, December 2013

Effective predictions of event shapes: factorized, resummed and gapped angularity distributions journal, May 2009

Probing quarkonium production mechanisms with jet substructure text, January 2018

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations text, January 2014

Herwig++ Physics and Manual text, January 2008

Effective Predictions of Event Shapes: Factorized, Resummed, and Gapped Angularity Distributions text, January 2009

Quark Fragmentation within an Identified Jet text, January 2009

Jet Shapes and Jet Algorithms in SCET text, January 2010

SCET approach to top quark decay text, January 2010

Heavy Quark Fragmenting Jet Functions text, January 2013

Comparing and Counting Logs in Direct and Effective Methods of Resummation text, January 2014

Probing Quarkonium Production Mechanisms with Jet Substructure text, January 2014

Jet fragmentation functions in proton-proton collisions using soft-collinear effective theory text, January 2015

Jet Shapes in Dijet Events at the LHC in SCET text, January 2016

Jet substructure using semi-inclusive jet functions within SCET text, January 2016

Effective field theory approach to heavy quark fragmentation text, January 2016

Transverse Momentum Spectra at Threshold for Groomed Heavy Quark Jets text, January 2018

Phenomenology with a recoil-free jet axis: TMD fragmentation and the jet shape text, January 2018

Comparing and counting logs in direct and effective methods of QCD resummation
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Quark fragmentation within an identified jet
journal, April 2010

SCET approach to top quark decay
journal, May 2011

Parton fragmentation within an identified jet at NNLL
journal, May 2011

Fully-unintegrated parton distribution and fragmentation functions at perturbative k⊥
journal, April 2012

Heavy quark fragmenting jet functions
journal, April 2014

Probing quarkonium production mechanisms with jet substructure
journal, November 2014

Jet fragmentation functions in proton-proton collisions using soft-collinear effective theory
journal, May 2016

Rigorous QCD analysis of inclusive annihilation and production of heavy quarkonium
journal, February 1995

Event shape–energy flow correlations
journal, July 2003

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
journal, July 2014

PYTHIA 6.4 physics and manual
journal, May 2006

An introduction to PYTHIA 8.2
journal, June 2015

Herwig++ physics and manual
journal, November 2008

Jet shapes and jet algorithms in SCET
journal, November 2010

FastJet user manual: (for version 3.0.2)
journal, March 2012

Jet shapes in dijet events at the LHC in SCET
journal, April 2016

$Z^{0}$ decay into charmonium via charm quark fragmentation
journal, November 1993

Gluon fragmentation into heavy quarkonium
journal, September 1993

Color-Octet Fragmentation and the $ψ^{'}$ Surplus at the Fermilab Tevatron
journal, April 1995

Helicity decomposition for inclusive $\frac{J}{ψ}$ production
journal, September 1996

Next-To-Leading Order Tests of Non-Relativistic-Qcd Factorization with j/ψ Yield and Polarization
journal, March 2013

Rivet user manual
journal, December 2013

Effective predictions of event shapes: factorized, resummed and gapped angularity distributions
journal, May 2009

Probing quarkonium production mechanisms with jet substructure
text, January 2018

The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
text, January 2014

Herwig++ Physics and Manual
text, January 2008

Effective Predictions of Event Shapes: Factorized, Resummed, and Gapped Angularity Distributions
text, January 2009

Quark Fragmentation within an Identified Jet
text, January 2009

Jet Shapes and Jet Algorithms in SCET
text, January 2010

SCET approach to top quark decay
text, January 2010

Heavy Quark Fragmenting Jet Functions
text, January 2013

Comparing and Counting Logs in Direct and Effective Methods of Resummation
text, January 2014

Probing Quarkonium Production Mechanisms with Jet Substructure
text, January 2014

Jet fragmentation functions in proton-proton collisions using soft-collinear effective theory
text, January 2015

Jet Shapes in Dijet Events at the LHC in SCET
text, January 2016

Jet substructure using semi-inclusive jet functions within SCET
text, January 2016

Effective field theory approach to heavy quark fragmentation
text, January 2016

Transverse Momentum Spectra at Threshold for Groomed Heavy Quark Jets
text, January 2018

Phenomenology with a recoil-free jet axis: TMD fragmentation and the jet shape
text, January 2018