Probing color coherence effects in pp collisions at √s = 7 TeV

Chatrchyan, Serguei

doi:10.1140/epjc/s10052-014-2901-8

Title: Probing color coherence effects in pp collisions at √s = 7 TeV

Abstract

A study of color coherence effects in pp collisions at a center-of-mass energy of 7 TeV is presented. The data used in the analysis were collected in 2010 with the CMS detector at the LHC and correspond to an integrated luminosity of 36 inverse picobarns. Events are selected that contain at least three jets and where the two jets with the largest transverse momentum exhibit a back-to-back topology. The measured angular correlation between the second- and third-leading jet is shown to be sensitive to color coherence effects, and is compared to the predictions of Monte Carlo models with various implementations of color coherence. None of the models describe the data satisfactorily.

Authors:

Chatrchyan, Serguei ^[1]

Yerevan Physics Inst. (YerPhI), Yerevan (Armenia). et al.

Publication Date:: 2014-06-11

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

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

Contributing Org.:: The CMS Collaboration

OSTI Identifier:: 1151693

Report Number(s):: FERMILAB-PUB-13-620-CMS
Journal ID: ISSN 1434-6044; arXiv eprint number arXiv:1311.5815

Grant/Contract Number:: AC02-07CH11359

Resource Type:: Accepted Manuscript

Journal Name:: European Physical Journal. C, Particles and Fields

Additional Journal Information:: Journal Volume: 74; Journal Issue: 6; Journal ID: ISSN 1434-6044

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Chatrchyan, Serguei. Probing color coherence effects in pp collisions at √s = 7 TeV.  United States: N. p., 2014. 
Web.  doi:10.1140/epjc/s10052-014-2901-8.

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                    Chatrchyan, Serguei. Probing color coherence effects in pp collisions at √s = 7 TeV.  United States.  https://doi.org/10.1140/epjc/s10052-014-2901-8

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                    Chatrchyan, Serguei. Wed .  
"Probing color coherence effects in pp collisions at √s = 7 TeV".  United States.  https://doi.org/10.1140/epjc/s10052-014-2901-8.  https://www.osti.gov/servlets/purl/1151693.

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@article{osti_1151693,

  title        = {Probing color coherence effects in pp collisions at √s = 7 TeV},

  author       = {Chatrchyan, Serguei},

  abstractNote = {A study of color coherence effects in pp collisions at a center-of-mass energy of 7 TeV is presented. The data used in the analysis were collected in 2010 with the CMS detector at the LHC and correspond to an integrated luminosity of 36 inverse picobarns. Events are selected that contain at least three jets and where the two jets with the largest transverse momentum exhibit a back-to-back topology. The measured angular correlation between the second- and third-leading jet is shown to be sensitive to color coherence effects, and is compared to the predictions of Monte Carlo models with various implementations of color coherence. None of the models describe the data satisfactorily.},

  doi          = {10.1140/epjc/s10052-014-2901-8},

  journal      = {European Physical Journal. C, Particles and Fields},

  number       = 6,

  volume       = 74,

  place        = {United States},

  year         = {2014},

  month        = {6}

}

Copy to clipboard

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https://doi.org/10.1140/epjc/s10052-014-2901-8

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Fig. 1: Visualization of the observable $β$ in ($η$, $\phi$) space using a simulated three-jet event. The sizes of the rectangular boxes are proportional to the particle energies

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Title: Probing color coherence effects in pp collisions at √s = 7 TeV

Abstract

Citation Formats

Figures / Tables:

New Generation of Parton Distributions with Uncertainties from Global QCD Analysis journal, July 2002

MadGraph/MadEvent v4: the new web generation journal, September 2007

A study of coherence of soft gluons in hadron jets journal, September 1990

The anti- k t jet clustering algorithm journal, April 2008

Evidence for color coherence in pp¯ collisions at √ s =1.8 TeV journal, November 1994

Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA journal, May 2004

Tests of Models for Parton Fragmentation by Means of Three-Jet Events in e + e − Annihilation at s = 29 GeV journal, January 1985

Determination of jet energy calibration and transverse momentum resolution in CMS journal, November 2011

The merging of jets journal, August 1984

A brief introduction to PYTHIA 8.1 journal, June 2008

A study of 3-jet events ine + e − annihilation into hadrons at 34.6 GeV c.m. energy journal, March 1985

PYTHIA 6.4 physics and manual journal, May 2006

Evidence for gluon interference in hadronic Z decays journal, June 1995

Parton fragmentation and string dynamics journal, July 1983

Monte Carlo simulation of general hard processes with coherent QCD radiation journal, December 1988

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

Test of fragmentation models by comparison with three-jet events produced in e+e−→ hadrons journal, January 1984

Comparison of the particle flow in Three-Jet and radiative Two-Jet Events from e + e − Annihilation at E c . m . = 29 GeV journal, September 1986

A multidimensional unfolding method based on Bayes' theorem journal, August 1995

Coherent parton showers versus matrix elements - implications of PETRA/PEP data journal, February 1987

Interleaved parton showers and tuning prospects journal, March 2011

Pileup subtraction using jet areas journal, January 2008

Geant4—a simulation toolkit journal, July 2003

Transverse-momentum-ordered showers and interleaved multiple interactions journal, February 2005

A QCD model for jet fragmentation including soft gluon interference journal, June 1984

Color coherent radiation in multijet events from collisions at journal, November 1997

The CMS experiment at the CERN LHC journal, August 2008

Herwig++ physics and manual journal, November 2008

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

A comparative study of coherent and non-coherent parton shower evolution journal, January 1987

Tests of models for quark and gluon fragmentation ine + e − annihilation at $$\sqrt s = 29 GeV$$ journal, March 1985

New formalism for QCD parton showers journal, December 2003

Comparison of the Particle Flow in q q ¯ g and q q ¯ γ Events in e + e − Annihilation journal, August 1986

Simulation of multiple partonic interactions in Herwig++ journal, July 2008

New Generation of Parton Distributions with Uncertainties from Global QCD Analysis
journal, July 2002

MadGraph/MadEvent v4: the new web generation
journal, September 2007

A study of coherence of soft gluons in hadron jets
journal, September 1990

The anti- k _t jet clustering algorithm
journal, April 2008

Evidence for color coherence in pp¯ collisions at √ s =1.8 TeV
journal, November 1994

Matching Matrix Elements and Parton Showers with HERWIG and PYTHIA
journal, May 2004

Tests of Models for Parton Fragmentation by Means of Three-Jet Events in $e^{+} e^{-}$ Annihilation at $\sqrt{s} = 29$ GeV
journal, January 1985

Determination of jet energy calibration and transverse momentum resolution in CMS
journal, November 2011

The merging of jets
journal, August 1984

A brief introduction to PYTHIA 8.1
journal, June 2008

A study of 3-jet events ine + e − annihilation into hadrons at 34.6 GeV c.m. energy
journal, March 1985

PYTHIA 6.4 physics and manual
journal, May 2006

Evidence for gluon interference in hadronic Z decays
journal, June 1995

Parton fragmentation and string dynamics
journal, July 1983

Monte Carlo simulation of general hard processes with coherent QCD radiation
journal, December 1988

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

Test of fragmentation models by comparison with three-jet events produced in e+e−→ hadrons
journal, January 1984

Comparison of the particle flow in Three-Jet and radiative Two-Jet Events from $e^{+} e^{-}$ Annihilation at $E_{c . m .} = 29$ GeV
journal, September 1986

A multidimensional unfolding method based on Bayes' theorem
journal, August 1995

Coherent parton showers versus matrix elements - implications of PETRA/PEP data
journal, February 1987

Interleaved parton showers and tuning prospects
journal, March 2011

Pileup subtraction using jet areas
journal, January 2008

Geant4—a simulation toolkit
journal, July 2003

Transverse-momentum-ordered showers and interleaved multiple interactions
journal, February 2005

A QCD model for jet fragmentation including soft gluon interference
journal, June 1984

Color coherent radiation in multijet events from collisions at
journal, November 1997

The CMS experiment at the CERN LHC
journal, August 2008

Herwig++ physics and manual
journal, November 2008

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

A comparative study of coherent and non-coherent parton shower evolution
journal, January 1987

Tests of models for quark and gluon fragmentation ine + e − annihilation at $$\sqrt s = 29 GeV$$
journal, March 1985

New formalism for QCD parton showers
journal, December 2003

Comparison of the Particle Flow in $q \bar{q} g$ and $q \bar{q} γ$ Events in $e^{+} e^{-}$ Annihilation
journal, August 1986

Simulation of multiple partonic interactions in Herwig++
journal, July 2008