Improving LHC searches for dark photons using lepton-jet substructure

Barello, G.; Chang, Spencer; Newby, Christopher A.; Ostdiek, Bryan

doi:10.1103/PhysRevD.95.055007

Title: Improving LHC searches for dark photons using lepton-jet substructure

Abstract

Collider signals of dark photons are an exciting probe for new gauge forces and are characterized by events with boosted lepton jets. Existing techniques are efficient in searching for muonic lepton jets but due to substantial backgrounds have difficulty constraining lepton jets containing only electrons. This is unfortunate since upcoming intensity frontier experiments are sensitive to dark photon masses which only allow electron decays. Analyzing a recently proposed model of kinetic mixing, with new scalar particles decaying into dark photons, we find that existing techniques for electron jets can be substantially improved. We show that using lepton-jet-substructure variables, in association with a boosted decision tree, improves background rejection, significantly increasing the LHC’s reach for dark photons in this region of parameter space.

Authors:

Barello, G. ^[1]; Chang, Spencer ^[1]; Newby, Christopher A. ^[1]; Ostdiek, Bryan ^[1]

Univ. of Oregon, Eugene, OR (United States)

Publication Date:: Tue Mar 07 00:00:00 EST 2017

Research Org.:: Univ. of Oregon, Eugene, OR (United States)

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

OSTI Identifier:: 1600036

Alternate Identifier(s):: OSTI ID: 1346089

Grant/Contract Number:: SC0011640

Resource Type:: Accepted Manuscript

Journal Name:: Physical Review D

Additional Journal Information:: Journal Volume: 95; Journal Issue: 5; 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


                    Barello, G., Chang, Spencer, Newby, Christopher A., and Ostdiek, Bryan. Improving LHC searches for dark photons using lepton-jet substructure.  United States: N. p., 2017. 
Web.  doi:10.1103/PhysRevD.95.055007.

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                    Barello, G., Chang, Spencer, Newby, Christopher A., & Ostdiek, Bryan. Improving LHC searches for dark photons using lepton-jet substructure.  United States.  https://doi.org/10.1103/PhysRevD.95.055007

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                    Barello, G., Chang, Spencer, Newby, Christopher A., and Ostdiek, Bryan. Tue .  
"Improving LHC searches for dark photons using lepton-jet substructure".  United States.  https://doi.org/10.1103/PhysRevD.95.055007.  https://www.osti.gov/servlets/purl/1600036.

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@article{osti_1600036,

  title        = {Improving LHC searches for dark photons using lepton-jet substructure},

  author       = {Barello, G. and Chang, Spencer and Newby, Christopher A. and Ostdiek, Bryan},

  abstractNote = {Collider signals of dark photons are an exciting probe for new gauge forces and are characterized by events with boosted lepton jets. Existing techniques are efficient in searching for muonic lepton jets but due to substantial backgrounds have difficulty constraining lepton jets containing only electrons. This is unfortunate since upcoming intensity frontier experiments are sensitive to dark photon masses which only allow electron decays. Analyzing a recently proposed model of kinetic mixing, with new scalar particles decaying into dark photons, we find that existing techniques for electron jets can be substantially improved. We show that using lepton-jet-substructure variables, in association with a boosted decision tree, improves background rejection, significantly increasing the LHC’s reach for dark photons in this region of parameter space.},

  doi          = {10.1103/PhysRevD.95.055007},

  journal      = {Physical Review D},

  number       = 5,

  volume       = 95,

  place        = {United States},

  year         = {Tue Mar 07 00:00:00 EST 2017},

  month        = {Tue Mar 07 00:00:00 EST 2017}

}

Copy to clipboard

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Works referencing / citing this record:

Towards a UV model of kinetic mixing and portal matter
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Title: Improving LHC searches for dark photons using lepton-jet substructure

Abstract

Citation Formats

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Correlated signals at the energy and intensity frontiers from non-Abelian kinetic mixing journal, September 2016

Proposed Inclusive Dark Photon Search at LHCb journal, June 2016

Maximizing boosted top identification by minimizing N-subjettiness journal, February 2012

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Experimental considerations motivated by the diphoton excess at the LHC journal, June 2016

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Review of Particle Physics journal, August 2014

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PYTHIA 6.4 physics and manual journal, May 2006

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Secluded WIMP dark matter journal, April 2008

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

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

Non-abelian dark sectors and their collider signatures journal, April 2009

Illuminating dark photons with high-energy colliders journal, February 2015

A Decision-Theoretic Generalization of On-Line Learning and an Application to Boosting journal, August 1997

Photons, photon jets, and dark photons at 750 GeV and beyond journal, May 2016

A search for prompt lepton-jets in pp collisions at s = 8 $$ \sqrt{\mathrm{s}}=8 $$ TeV with the ATLAS detector journal, February 2016

Identifying boosted objects with N-subjettiness journal, March 2011

Making the small oblique parameters large journal, February 1994

Hidden Higgs decaying to lepton jets journal, May 2010

Discovering Higgs Boson Decays to Lepton Jets at Hadron Colliders journal, December 2010

Phenomenology of photon-jets journal, January 2013

N Jettiness: An Inclusive Event Shape to Veto Jets journal, August 2010

Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in p p collisions at s = 8 TeV with the ATLAS detector journal, October 2015

Evidence for Electroweak Production of W ± W ± j j in p p Collisions at s = 8 TeV with the ATLAS Detector journal, October 2014

Faking ordinary photons by displaced dark photon decays journal, January 2017

Two U(1)'s and ϵ charge shifts journal, January 1986

A search for pair production of new light bosons decaying into muons journal, January 2016

LHC signals for a SuperUnified theory of Dark Matter journal, December 2008

Successive combination jet algorithm for hadron collisions journal, October 1993

Better jet clustering algorithms journal, August 1997

Jets and Photons journal, March 2013

Towards a UV model of kinetic mixing and portal matter journal, January 2020

Kinetic Mixing and Portal Matter Phenomenology text, January 2018

Jet Substructure as a New Higgs-Search Channel at the Large Hadron Collider
journal, June 2008

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

Correlated signals at the energy and intensity frontiers from non-Abelian kinetic mixing
journal, September 2016

Proposed Inclusive Dark Photon Search at LHCb
journal, June 2016

Maximizing boosted top identification by minimizing N-subjettiness
journal, February 2012

A theory of dark matter
journal, January 2009

Experimental considerations motivated by the diphoton excess at the LHC
journal, June 2016

Lepton jets in (supersymmetric) electroweak processes
journal, April 2010

Review of Particle Physics
journal, August 2014

Longitudinally-invariant k⊥-clustering algorithms for hadron-hadron collisions
journal, September 1993

FeynRules – Feynman rules made easy
journal, September 2009

PYTHIA 6.4 physics and manual
journal, May 2006

DELPHES 3: a modular framework for fast simulation of a generic collider experiment
journal, February 2014

Secluded WIMP dark matter
journal, April 2008

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

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

Non-abelian dark sectors and their collider signatures
journal, April 2009

Illuminating dark photons with high-energy colliders
journal, February 2015

A Decision-Theoretic Generalization of On-Line Learning and an Application to Boosting
journal, August 1997

Photons, photon jets, and dark photons at 750 GeV and beyond
journal, May 2016

A search for prompt lepton-jets in pp collisions at s = 8 $$ \sqrt{\mathrm{s}}=8 $$ TeV with the ATLAS detector
journal, February 2016

Identifying boosted objects with N-subjettiness
journal, March 2011

Making the small oblique parameters large
journal, February 1994

Hidden Higgs decaying to lepton jets
journal, May 2010

Discovering Higgs Boson Decays to Lepton Jets at Hadron Colliders
journal, December 2010

Phenomenology of photon-jets
journal, January 2013

$N$ Jettiness: An Inclusive Event Shape to Veto Jets
journal, August 2010

Search for massive, long-lived particles using multitrack displaced vertices or displaced lepton pairs in $p p$ collisions at $\sqrt{s} = 8 TeV$ with the ATLAS detector
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Evidence for Electroweak Production of $W^{\pm} W^{\pm} j j$ in $p p$ Collisions at $\sqrt{s} = 8 TeV$ with the ATLAS Detector
journal, October 2014

Faking ordinary photons by displaced dark photon decays
journal, January 2017

Two U(1)'s and ϵ charge shifts
journal, January 1986

A search for pair production of new light bosons decaying into muons
journal, January 2016

LHC signals for a SuperUnified theory of Dark Matter
journal, December 2008

Successive combination jet algorithm for hadron collisions
journal, October 1993

Better jet clustering algorithms
journal, August 1997

Jets and Photons
journal, March 2013

Towards a UV model of kinetic mixing and portal matter
journal, January 2020

Kinetic Mixing and Portal Matter Phenomenology
text, January 2018