Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at ${\sqrt{s} = 8}$ s = 8 TeV using the ATLAS experiment

Aad, G.

doi:10.1140/epjc/s10052-015-3609-0

Title: Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at $${\sqrt{s} = 8}$$ s = 8 TeV using the ATLAS experiment

Abstract

Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of 18.4 fb^–1 of pp collisions at √s = 8 TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on R-hadrons and chargino production are set. Gluino R-hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95 % confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV.

Authors:

Aad, G. ^[1]

National Centre for Scientific Research (CNRS), Marseilles (France). Centre for Particle Physics of Marseilles (CPPM); et al.

Publication Date:: Thu Sep 03 00:00:00 EDT 2015

Research Org.:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Brookhaven National Laboratory (BNL), Upton, NY (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

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

Contributing Org.:: ATLAS Collaboration

OSTI Identifier:: 1222752

Alternate Identifier(s):: OSTI ID: 1222763; OSTI ID: 1223293; OSTI ID: 1223295; OSTI ID: 1409416

Grant/Contract Number:: AC03-76SF00515; AC02-06CH11357; AC02-05CH11231; SC00112704; AC02-98CH10886; AC02-76CH00016; SC0012704; AC03-76SF00098

Resource Type:: Accepted Manuscript

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

Additional Journal Information:: Journal Volume: 75; Journal Issue: 9; Journal ID: ISSN 1434-6044

Publisher:: Springer

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats


                    Aad, G. Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at ${\sqrt{s} = 8}$ s = 8 TeV using the ATLAS experiment.  United States: N. p., 2015. 
Web.  doi:10.1140/epjc/s10052-015-3609-0.

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                    Aad, G. Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at ${\sqrt{s} = 8}$ s = 8 TeV using the ATLAS experiment.  United States.  https://doi.org/10.1140/epjc/s10052-015-3609-0

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                    Aad, G. Thu .  
"Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at ${\sqrt{s} = 8}$ s = 8 TeV using the ATLAS experiment".  United States.  https://doi.org/10.1140/epjc/s10052-015-3609-0.  https://www.osti.gov/servlets/purl/1222752.

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@article{osti_1222752,

  title        = {Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at ${\sqrt{s} = 8}$ s = 8 TeV using the ATLAS experiment},

  author       = {Aad, G.},

  abstractNote = {Many extensions of the Standard Model predict the existence of charged heavy long-lived particles, such as R-hadrons or charginos. These particles, if produced at the Large Hadron Collider, should be moving non-relativistically and are therefore identifiable through the measurement of an anomalously large specific energy loss in the ATLAS pixel detector. Measuring heavy long-lived particles through their track parameters in the vicinity of the interaction vertex provides sensitivity to metastable particles with lifetimes from 0.6 ns to 30 ns. A search for such particles with the ATLAS detector at the Large Hadron Collider is presented, based on a data sample corresponding to an integrated luminosity of 18.4 fb–1 of pp collisions at √s = 8 TeV. No significant deviation from the Standard Model background expectation is observed, and lifetime-dependent upper limits on R-hadrons and chargino production are set. Gluino R-hadrons with 10 ns lifetime and masses up to 1185 GeV are excluded at 95 % confidence level, and so are charginos with 15 ns lifetime and masses up to 482 GeV.},

  doi          = {10.1140/epjc/s10052-015-3609-0},

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

  number       = 9,

  volume       = 75,

  place        = {United States},

  year         = {Thu Sep 03 00:00:00 EDT 2015},

  month        = {Thu Sep 03 00:00:00 EDT 2015}

}

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Title: Search for metastable heavy charged particles with large ionisation energy loss in pp collisions at $${\sqrt{s} = 8}$$ s = 8 TeV using the ATLAS experiment

Abstract

Citation Formats

Stable massive particles at colliders journal, January 2007

Interactions of coloured heavy stable particles in matter journal, March 2007

Improved luminosity determination in pp collisions at $\sqrt {s} = 7\ \mathrm{TeV}$ using the ATLAS detector at the LHC journal, August 2013

Interactions of heavy hadrons using Regge phenomenology and the quark–gluon string model journal, June 2008

Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton–proton collision data journal, November 2014

Graviton cosmology in universal extra dimensions journal, October 2003

Precision predictions for electroweak superpartner production at hadron colliders with Resummino journal, July 2013

Combined performance tests before installation of the ATLAS Semiconductor and Transition Radiation Tracking Detectors journal, August 2008

Interactions of heavy stable hadronising particles journal, September 2004

Squark and gluino production at hadron colliders journal, May 1997

Measurement of the inclusive W ± and Z / γ * cross sections in the e and μ decay channels in p p collisions at s = 7 TeV with the ATLAS detector journal, April 2012

Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at s = 8 TeV journal, January 2015

R-Parity-violating supersymmetry journal, November 2005

Straggling in thin silicon detectors journal, July 1988

Soft-gluon resummation for squark and gluino hadroproduction journal, December 2009

Colour reconnections in Herwig++ journal, November 2012

Gravitons and dark matter in universal extra dimensions journal, November 2006

The gauge hierarchy problem, technicolor, supersymmetry, and all that journal, February 1984

Searching for supersymmetry in hadrons journal, March 2000

Lower Limits on R -Parity-Violating Couplings in Supersymmetric Models with Light Squarks journal, May 2004

Squark and Gluino Hadroproduction journal, June 2011

Out of this world supersymmetry breaking journal, September 1999

Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton–proton collision data journal, July 2014

Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s} = 7~\mbox{TeV}$ with ATLAS journal, January 2012

Analysis of a heavy gluino LSP at CDF: The heavy gluino window journal, July 2000

Herwig++ physics and manual journal, November 2008

Phenomenology of the production, decay, and detection of new hadronic states associated with supersymmetry journal, July 1978

Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC journal, November 2009

Aspects of Split Supersymmetry journal, March 2005

Split supersymmetry journal, November 2004

Gaugino production in proton-proton collisions at a center-of-mass energy of 8 TeV journal, October 2012

Production of Charginos, Neutralinos, and Sleptons at Hadron Colliders journal, November 1999

LHC searches for non-chiral weakly charged multiplets journal, May 2011

Jet energy measurement and its systematic uncertainty in proton–proton collisions at $$\sqrt{s}=7$$ s = 7 TeV with the ATLAS detector journal, January 2015

Threshold Resummation for Squark-Antisquark and Gluino-Pair Production at the LHC journal, March 2009

Gauge-mediated supersymmetry breaking: Introduction, review and update journal, March 1998

Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in p p collisions at ( s ) = 8 TeV with the ATLAS detector journal, December 2013

Mini-Split journal, February 2013

Measurements of underlying-event properties using neutral and charged particles in pp collisions at $\sqrt{s}=900$ GeV and $\sqrt{s}=7$ TeV with the ATLAS detector at the LHC journal, May 2011

Presentation of search results: the CL s technique journal, September 2002

Gaugino mass without singlets journal, December 1998

Heavy gluino as the lightest supersymmetric particle journal, February 1999

Operation and performance of the ATLAS semiconductor tracker journal, August 2014

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

Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at √s = 8 TeV text, January 2015

Search for Long-Lived Neutral Particles Decaying to Quark-Antiquark Pairs in Proton-Proton Collisions at √s = 8 TeV text, January 2015

The Production of Charginos/Neutralinos and Sleptons at Hadron Colliders text, January 1999

Interactions of Heavy Hadrons using Regge Phenomenology and the Quark Gluon String Model text, January 2007

Herwig++ Physics and Manual text, January 2008

Soft-gluon resummation for squark and gluino hadroproduction text, January 2009

Measurements of underlying-event properties using neutral and charged particles in pp collisions at 900 GeV and 7 TeV with the ATLAS detector at the LHC text, January 2011

Squark and gluino hadroproduction text, January 2011

Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector at the LHC text, January 2013

Interactions of Heavy Stable Hadronizing Particles text, January 2004

R-parity violating supersymmetry text, January 2004

Split Supersymmetry text, January 2004

Aspects of Split Supersymmetry text, January 2004

Gauge-Mediated Supersymmetry Breaking: Introduction, Review and Update text, January 1997

Gaugino Mass without Singlets text, January 1998

The Production of Charginos/Neutralinos and Sleptons at Hadron Colliders text, January 1999

An analysis of a Heavy Gluino LSP at CDF : The Heavy Gluino Window text, January 1999

Out Of This World Supersymmetry Breaking text, January 1998

Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV journal, March 2018

Minimal natural supersymmetry after the LHC8 journal, May 2016

Stable massive particles at colliders
journal, January 2007

Interactions of coloured heavy stable particles in matter
journal, March 2007

Improved luminosity determination in pp collisions at $\sqrt {s} = 7\ \mathrm{TeV}$ using the ATLAS detector at the LHC
journal, August 2013

Interactions of heavy hadrons using Regge phenomenology and the quark–gluon string model
journal, June 2008

Measurement of the muon reconstruction performance of the ATLAS detector using 2011 and 2012 LHC proton–proton collision data
journal, November 2014

Graviton cosmology in universal extra dimensions
journal, October 2003

Precision predictions for electroweak superpartner production at hadron colliders with Resummino
journal, July 2013

Combined performance tests before installation of the ATLAS Semiconductor and Transition Radiation Tracking Detectors
journal, August 2008

Interactions of heavy stable hadronising particles
journal, September 2004

Squark and gluino production at hadron colliders
journal, May 1997

Measurement of the inclusive $W^{\pm}$ and $Z / γ *$ cross sections in the $e$ and $μ$ decay channels in $p p$ collisions at $\sqrt{s} = 7 TeV$ with the ATLAS detector
journal, April 2012

Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at $\sqrt{s} = 8 TeV$
journal, January 2015

R-Parity-violating supersymmetry
journal, November 2005

Straggling in thin silicon detectors
journal, July 1988

Soft-gluon resummation for squark and gluino hadroproduction
journal, December 2009

Colour reconnections in Herwig++
journal, November 2012

Gravitons and dark matter in universal extra dimensions
journal, November 2006

The gauge hierarchy problem, technicolor, supersymmetry, and all that
journal, February 1984

Searching for supersymmetry in hadrons
journal, March 2000

Lower Limits on $R$ -Parity-Violating Couplings in Supersymmetric Models with Light Squarks
journal, May 2004

Squark and Gluino Hadroproduction
journal, June 2011

Out of this world supersymmetry breaking
journal, September 1999

Electron reconstruction and identification efficiency measurements with the ATLAS detector using the 2011 LHC proton–proton collision data
journal, July 2014

Performance of missing transverse momentum reconstruction in proton-proton collisions at $\sqrt{s} = 7~\mbox{TeV}$ with ATLAS
journal, January 2012

Analysis of a heavy gluino LSP at CDF: The heavy gluino window
journal, July 2000

Herwig++ physics and manual
journal, November 2008

Phenomenology of the production, decay, and detection of new hadronic states associated with supersymmetry
journal, July 1978

Soft gluon resummation for the production of gluino-gluino and squark-antisquark pairs at the LHC
journal, November 2009

Aspects of Split Supersymmetry
journal, March 2005

Split supersymmetry
journal, November 2004

Gaugino production in proton-proton collisions at a center-of-mass energy of 8 TeV
journal, October 2012

Production of Charginos, Neutralinos, and Sleptons at Hadron Colliders
journal, November 1999

LHC searches for non-chiral weakly charged multiplets
journal, May 2011

Jet energy measurement and its systematic uncertainty in proton–proton collisions at $$\sqrt{s}=7$$ s = 7 TeV with the ATLAS detector
journal, January 2015

Threshold Resummation for Squark-Antisquark and Gluino-Pair Production at the LHC
journal, March 2009

Gauge-mediated supersymmetry breaking: Introduction, review and update
journal, March 1998

Search for charginos nearly mass degenerate with the lightest neutralino based on a disappearing-track signature in $p p$ collisions at $\sqrt{(} s) = 8 TeV$ with the ATLAS detector
journal, December 2013

Mini-Split
journal, February 2013

Measurements of underlying-event properties using neutral and charged particles in pp collisions at $\sqrt{s}=900$ GeV and $\sqrt{s}=7$ TeV with the ATLAS detector at the LHC
journal, May 2011

Presentation of search results: the CL _s technique
journal, September 2002

Gaugino mass without singlets
journal, December 1998

Heavy gluino as the lightest supersymmetric particle
journal, February 1999

Operation and performance of the ATLAS semiconductor tracker
journal, August 2014

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

Search for long-lived neutral particles decaying to quark-antiquark pairs in proton-proton collisions at √s = 8 TeV
text, January 2015

Search for Long-Lived Neutral Particles Decaying to Quark-Antiquark Pairs in Proton-Proton Collisions at √s = 8 TeV
text, January 2015

The Production of Charginos/Neutralinos and Sleptons at Hadron Colliders
text, January 1999

Interactions of Heavy Hadrons using Regge Phenomenology and the Quark Gluon String Model
text, January 2007

Herwig++ Physics and Manual
text, January 2008

Soft-gluon resummation for squark and gluino hadroproduction
text, January 2009

Measurements of underlying-event properties using neutral and charged particles in pp collisions at 900 GeV and 7 TeV with the ATLAS detector at the LHC
text, January 2011

Squark and gluino hadroproduction
text, January 2011

Improved luminosity determination in pp collisions at sqrt(s) = 7 TeV using the ATLAS detector at the LHC
text, January 2013

Interactions of Heavy Stable Hadronizing Particles
text, January 2004

R-parity violating supersymmetry
text, January 2004

Split Supersymmetry
text, January 2004

Aspects of Split Supersymmetry
text, January 2004

Gauge-Mediated Supersymmetry Breaking: Introduction, Review and Update
text, January 1997

Gaugino Mass without Singlets
text, January 1998

The Production of Charginos/Neutralinos and Sleptons at Hadron Colliders
text, January 1999

An analysis of a Heavy Gluino LSP at CDF : The Heavy Gluino Window
text, January 1999

Out Of This World Supersymmetry Breaking
text, January 1998

Combined search for electroweak production of charginos and neutralinos in proton-proton collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
journal, March 2018

Minimal natural supersymmetry after the LHC8
journal, May 2016