Sneaky light stop

Eifert, Till; Nachman, Benjamin

doi:10.1016/j.physletb.2015.02.039

Title: Sneaky light stop

Abstract

A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the standard model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this ‘stealth stop’ scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. Due to the different initial states, the size of the bias is slightly different between the LHC and the Tevatron. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples.

Authors:

Eifert, Till ^[1]; Nachman, Benjamin ^[2]

CERN (Switzerland)
Stanford Univ., CA (United States)

Publication Date:: Fri Feb 20 00:00:00 EST 2015

Research Org.:: SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)

Sponsoring Org.:: USDOE; National Science Foundation (NSF); Stanford Univ.

OSTI Identifier:: 1193016

Grant/Contract Number:: AC02-76SF00515; DGE-4747

Resource Type:: Accepted Manuscript

Journal Name:: Physics Letters. B

Additional Journal Information:: Journal Volume: 743; Journal Issue: C; Journal ID: ISSN 0370-2693

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; supersymmetry; stealth stop; top mass; Large Hadron Collider

Citation Formats


                    Eifert, Till, and Nachman, Benjamin. Sneaky light stop.  United States: N. p., 2015. 
Web.  doi:10.1016/j.physletb.2015.02.039.

Copy to clipboard


                    Eifert, Till, & Nachman, Benjamin. Sneaky light stop.  United States.  https://doi.org/10.1016/j.physletb.2015.02.039

Copy to clipboard


                    Eifert, Till, and Nachman, Benjamin. Fri .  
"Sneaky light stop".  United States.  https://doi.org/10.1016/j.physletb.2015.02.039.  https://www.osti.gov/servlets/purl/1193016.

Copy to clipboard


                    
@article{osti_1193016,

  title        = {Sneaky light stop},

  author       = {Eifert, Till and Nachman, Benjamin},

  abstractNote = {A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the standard model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this ‘stealth stop’ scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. Due to the different initial states, the size of the bias is slightly different between the LHC and the Tevatron. The studies make some simplifying assumptions for the top quark measurement technique, and are based on truth-level samples.},

  doi          = {10.1016/j.physletb.2015.02.039},

  journal      = {Physics Letters. B},

  number       = C,

  volume       = 743,

  place        = {United States},

  year         = {Fri Feb 20 00:00:00 EST 2015},

  month        = {Fri Feb 20 00:00:00 EST 2015}

}

Copy to clipboard

Journal Article:

Free Publicly Available Full Text

Accepted Manuscript (DOE)

Publisher's Version of Record

https://doi.org/10.1016/j.physletb.2015.02.039

Other availability

Search WorldCat to find libraries that may hold this journal

Citation Metrics:

Cited by: 17 works

Citation information provided by
Web of Science

Save / Share:

Export Metadata

Save to My Library

Works referenced in this record:

A stealth supersymmetry sampler
journal, July 2012

Fan, JiJi; Reece, Matthew; Ruderman, Joshua T.
Journal of High Energy Physics, Vol. 2012, Issue 7
DOI: 10.1007/JHEP07(2012)196

Stealth supersymmetry
journal, November 2011

Fan, JiJi; Reece, Matthew; Ruderman, Joshua T.
Journal of High Energy Physics, Vol. 2011, Issue 11
DOI: 10.1007/JHEP11(2011)012

Light stops from Seiberg duality
journal, October 2012

Csáki, Csaba; Randall, Lisa; Terning, John
Physical Review D, Vol. 86, Issue 7
DOI: 10.1103/PhysRevD.86.075009

Measurement of the $$t\overline{t}$$ t t ¯ production cross-section using $$e\mu $$ e μ events with $$b$$ b -tagged jets in $$pp$$ p p collisions at $$\sqrt{s}=7$$ s = 7 and 8 TeV with the ATLAS detector
journal, October 2014

Aad, G.; Abbott, B.; Abdallah, J.
The European Physical Journal C, Vol. 74, Issue 10
DOI: 10.1140/epjc/s10052-014-3109-7

Removing Gaps in the Exclusion of Top Squark Parameter Space
journal, November 2014

Czakon, Michal; Mitov, Alexander; Papucci, Michele
Physical Review Letters, Vol. 113, Issue 20
DOI: 10.1103/PhysRevLett.113.201803

NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
journal, January 2013

Czakon, Michal; Mitov, Alexander
Journal of High Energy Physics, Vol. 2013, Issue 1
DOI: 10.1007/JHEP01(2013)080

NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
journal, December 2012

Czakon, Michal; Mitov, Alexander
Journal of High Energy Physics, Vol. 2012, Issue 12
DOI: 10.1007/JHEP12(2012)054

Percent-Level-Precision Physics at the Tevatron: Next-to-Next-to-Leading Order QCD Corrections to $q \bar{q} \to t \bar{t} + X$
journal, September 2012

Bärnreuther, Peter; Czakon, Michał; Mitov, Alexander
Physical Review Letters, Vol. 109, Issue 13
DOI: 10.1103/PhysRevLett.109.132001

Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
journal, April 2012

Cacciari, Matteo; Czakon, Michał; Mangano, Michelangelo
Physics Letters B, Vol. 710, Issue 4-5
DOI: 10.1016/j.physletb.2012.03.013

Spin correlation effects in top quark pair production at the LHC
journal, April 2010

Mahlon, Gregory; Parke, Stephen J.
Physical Review D, Vol. 81, Issue 7
DOI: 10.1103/PhysRevD.81.074024

Determination of the top quark mass circa 2013: methods, subtleties, perspectives
journal, October 2014

Juste, Aurelio; Mantry, Sonny; Mitov, Alexander
The European Physical Journal C, Vol. 74, Issue 10
DOI: 10.1140/epjc/s10052-014-3119-5

Precision Measurement of the Top Quark Mass in <span class="aps-inline-formula"><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mstyle mathvariant="normal"><mi>L</mi></mstyle><mtext mathvariant="bold">epton</mtext><mo>+</mo><mstyle mathvariant="normal"><mi>J</mi></mstyle><mtext mathvariant="bold">ets</mtext></mrow></math></span> Final States
journal, July 2014

Abazov, V. M.; Abbott, B.; Acharya, B. S.
Physical Review Letters, Vol. 113, Issue 3
DOI: 10.1103/PhysRevLett.113.032002

Herwig++ physics and manual
journal, November 2008

Bähr, Manuel; Gieseke, Stefan; Gigg, Martyn A.
The European Physical Journal C, Vol. 58, Issue 4
DOI: 10.1140/epjc/s10052-008-0798-9

Top++: A program for the calculation of the top-pair cross-section at hadron colliders
journal, November 2014

Czakon, Michał; Mitov, Alexander
Computer Physics Communications, Vol. 185, Issue 11
DOI: 10.1016/j.cpc.2014.06.021

Parton distributions for the LHC
journal, July 2009

Martin, A. D.; Stirling, W. J.; Thorne, R. S.
The European Physical Journal C, Vol. 63, Issue 2
DOI: 10.1140/epjc/s10052-009-1072-5

Total Top-Quark Pair-Production Cross Section at Hadron Colliders Through $O (α_{S}^{4})$
journal, June 2013

Czakon, Michał; Fiedler, Paul; Mitov, Alexander
Physical Review Letters, Vol. 110, Issue 25
DOI: 10.1103/PhysRevLett.110.252004

Supersymmetric top and bottom squark production at hadron colliders
journal, August 2010

Beenakker, Wim; Brensing, Silja; Krämer, Michael
Journal of High Energy Physics, Vol. 2010, Issue 8
DOI: 10.1007/JHEP08(2010)098

Light stop NLSPs at the Tevatron and LHC
journal, August 2011

Kats, Yevgeny; Shih, David
Journal of High Energy Physics, Vol. 2011, Issue 8
DOI: 10.1007/JHEP08(2011)049

Rivet user manual
journal, December 2013

Buckley, Andy; Butterworth, Jonathan; Grellscheid, David
Computer Physics Communications, Vol. 184, Issue 12
DOI: 10.1016/j.cpc.2013.05.021

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

Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
The European Physical Journal C, Vol. 72, Issue 3
DOI: 10.1140/epjc/s10052-012-1896-2

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

Alwall, J.; Frederix, R.; Frixione, S.
Journal of High Energy Physics, Vol. 2014, Issue 7
DOI: 10.1007/JHEP07(2014)079

Simulation of Finite Width Effects in Physics Beyond the Standard Model
preprint, January 2008

Gigg, M. A.; Richardson, P.
arXiv
DOI: 10.48550/arxiv.0805.3037

Light Stops from Seiberg Duality
text, January 2012

Csaki, Csaba; Randall, Lisa; Terning, John
arXiv
DOI: 10.48550/arxiv.1201.1293

Works referencing / citing this record:

Probing stop pair production at the LHC with graph neural networks
journal, August 2019

Abdughani, Murat; Ren, Jie; Wu, Lei
Journal of High Energy Physics, Vol. 2019, Issue 8
DOI: 10.1007/jhep08(2019)055

Magnifying the ATLAS stealth stop splinter: impact of spin correlations and finite widths
journal, July 2018

Cohen, Timothy; Hopkins, Walter; Majewski, Stephanie
Journal of High Energy Physics, Vol. 2018, Issue 7
DOI: 10.1007/jhep07(2018)142

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
journal, October 2015

Aad, G.; Abbott, B.; Abdallah, J.
The European Physical Journal C, Vol. 75, Issue 10
DOI: 10.1140/epjc/s10052-015-3726-9

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
text, January 2015

Atlas, Collaboration; Beck, Hans Peter; Cervelli, Alberto
EDP Sciences
DOI: 10.7892/boris.87608

Magnifying the ATLAS Stealth Stop Splinter: Impact of Spin Correlations and Finite Widths
text, January 2018

Cohen, Timothy; Hopkins, Walter; Majewski, Stephanie
arXiv
DOI: 10.48550/arxiv.1804.00111

Light stop in the MSSM after LHC Run 1
journal, September 2015

Bélanger, Geneviève; Ghosh, Diptimoy; Godbole, Rohini
Journal of High Energy Physics, Vol. 2015, Issue 9
DOI: 10.1007/jhep09(2015)214

Parameter inference from event ensembles and the top-quark mass
journal, September 2021

Flesher, Forrest; Fraser, Katherine; Hutchison, Charles
Journal of High Energy Physics, Vol. 2021, Issue 9
DOI: 10.1007/jhep09(2021)058

Measurements of top-quark pair spin correlations in the $$e\mu $$ channel at $$\sqrt{s} = 13$$ TeV using pp collisions in the ATLAS detector
journal, August 2020

Aaboud, M.; Aad, G.; Abbott, B.
The European Physical Journal C, Vol. 80, Issue 8
DOI: 10.1140/epjc/s10052-020-8181-6

Refining light stop exclusion limits with $W^+W^-$ cross sections
text, January 2015

Rolbiecki, Krzysztof; Tattersall, Jamie
arXiv
DOI: 10.48550/arxiv.1505.05523

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
text, January 2015

Collaboration, Atlas
arXiv
DOI: 10.48550/arxiv.1506.08616

Investigating the Quantum Properties of Jets and the Search for a Supersymmetric Top Quark Partner with the ATLAS Detector
preprint, January 2016

Nachman, Benjamin
arXiv
DOI: 10.48550/arxiv.1609.03242

Similar Records in DOE PAGES and OSTI.GOV collections:

Sneaky light stop

Journal Article Eifert, Till ; Nachman, Benjamin - Physics Letters. B

A light supersymmetric top quark partner (stop) with a mass nearly degenerate with that of the standard model (SM) top quark can evade direct searches. The precise measurement of SM top properties such as the cross-section has been suggested to give a handle for this ‘stealth stop’ scenario. We present an estimate of the potential impact a light stop may have on top quark mass measurements. The results indicate that certain light stop models may induce a bias of up to a few GeV, and that this effect can hide the shift in, and hence sensitivity from, cross-section measurements. Duemore »« less
https://doi.org/10.1016/j.physletb.2015.02.039
Revealing compressed stops using high-momentum recoils

Journal Article Macaluso, Sebastian ; Park, Michael ; Shih, David ; ... - Journal of High Energy Physics (Online)

In this study, searches for supersymmetric top quarks at the LHC have been making great progress in pushing sensitivity out to higher mass, but are famously plagued by gaps in coverage around lower-mass regions where the decay phase space is closing off. Within the common stop-NLSP/neutralino-LSP simplified model, the line in the mass plane where there is just enough phase space to produce an on-shell top quark remains almost completely unconstrained. Here, we show that is possible to define searches capable of probing a large patch of this difficult region, with S/B ~ 1 and significances often well beyond 5σ.more »« less
Cited by 27
https://doi.org/10.1007/JHEP03(2016)151

Full Text Available
On the ATLAS top mass measurements and the potential for stealth stop contamination

Journal Article Cohen, Timothy ; Majewski, Stephanie ; Ostdiek, Bryan ; ... - Journal of High Energy Physics (Online)

The discovery of the stop — the Supersymmetric partner of the top quark — is a key goal of the physics program enabled by the Large Hadron Collider. Although much of the accessible parameter space has already been probed, all current searches assume the top mass is known. This is relevant for the “stealth stop” regime, which is characterized by decay kinematics that force the final state top quark off its mass shell; such decays would contaminate the top mass measurements. We investigate the resulting bias imparted to the template method based ATLAS approach. A careful recasting of these resultsmore »« less
https://doi.org/10.1007/jhep06(2020)019

Full Text Available
Search for Third Generation Squarks in the Missing Transverse Energy plus Jet Sample at CDF Run II

Thesis/Dissertation Marono, Miguel Vidal

The twentieth century leaves behind one of the most impressive legacies, in terms of human knowledge, ever achieved. In particular the StandardModel (SM) of particle physics has proven to be one of the most accurate descriptions of Nature. The level of accuracy of some theoretical predictions has never been attained before. It includes the electromagnetic interaction, and the weak and strong force, developing the Lagrangian from symmetry principles. There are two different types of fundamental constituents of Nature, in the framework of the Standard Model: bosons and fermions. Bosons are those particles responsible for carrying the interactions among the fermions, which constitute matter. Fermions are divide into six quarks and six leptons, forming a three-folded structure. All these fermions and bosons have an antimatter partner. However, several difficulties point along with the idea that the Standard Model is only an effective low energy theory. These limitations include the difficulty to incorporate gravity and the lack of justification to fine tuning of some perturbative corrections. Moreover, some regions of the theory are not understood, like the mass spectrum of the Standard Model or the mechanism for electroweak symmetry breaking. Supersymmetry is a newer theoretical framework, thought to adress the problems found in the Standard Model, while preserving all its predictive power. It introduces a new symmetry that relates a new boson to each SM fermion and a new fermion to each SM boson. In this way, for every existing boson in the SM it must exist a fermionic super-partner (named with a sufix ino), and likewise, for every fermion a bosonic super-partner (named with a prefix s) must also exist. Moreover, another symmetry called R-parity is introduced to prevent baryon and lepton number violating interactions. If R-parity is conserved, super-particles can only be pair-produced and they cannot decay completely in SM particles. This implies the existence of a lightest SUSY particle (LSP) which would provide a candidate for cold dark matter, that account for 23% of the universe content, as strongly suggested by recent astrophysical data [1]. The Tevatron is a hadron collider operating at Fermilab, USA. This accelerator provides proton-antiproton (pmore »« less
https://doi.org/10.2172/975159

Full Text Available
Light stop searches at the LHC in events with one hard photon or jet and missing energy.

Journal Article Carena, M ; Freitas, A ; Wagner, C E.M. ; ... - J. High Energy Phys.

Low energy supersymmetric models provide a solution to the hierarchy problem and also have the necessary ingredients to solve two of the most outstanding issues in cosmology: the origin of the baryon asymmetry and the source of dark matter. In the MSSM, weak scale generation of the baryon asymmetry may be achieved in the presence of light stops, with masses lower than about 130 GeV. Moreover, the proper dark matter density may be obtained in the stop-neutralino co-annihilation region, where the stop-neutralino mass difference is smaller than a few tens of GeV. Searches for scalar top quarks (stops) in pairmore »« less
https://doi.org/10.1088/1126-6708/2008/10/109

Similar Records

Title: Sneaky light stop

Abstract

Citation Formats

A stealth supersymmetry sampler journal, July 2012

Stealth supersymmetry journal, November 2011

Light stops from Seiberg duality journal, October 2012

Measurement of the $$t\overline{t}$$ t t ¯ production cross-section using $$e\mu $$ e μ events with $$b$$ b -tagged jets in $$pp$$ p p collisions at $$\sqrt{s}=7$$ s = 7 and 8 TeV with the ATLAS detector journal, October 2014

Removing Gaps in the Exclusion of Top Squark Parameter Space journal, November 2014

NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction journal, January 2013

NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels journal, December 2012

Percent-Level-Precision Physics at the Tevatron: Next-to-Next-to-Leading Order QCD Corrections to q q ¯ → t t ¯ + X journal, September 2012

Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation journal, April 2012

Spin correlation effects in top quark pair production at the LHC journal, April 2010

Determination of the top quark mass circa 2013: methods, subtleties, perspectives journal, October 2014

Herwig++ physics and manual journal, November 2008

Top++: A program for the calculation of the top-pair cross-section at hadron colliders journal, November 2014

Parton distributions for the LHC journal, July 2009

Total Top-Quark Pair-Production Cross Section at Hadron Colliders Through O ( α S 4 ) journal, June 2013

Supersymmetric top and bottom squark production at hadron colliders journal, August 2010

Light stop NLSPs at the Tevatron and LHC journal, August 2011

Rivet user manual journal, December 2013

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

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

Simulation of Finite Width Effects in Physics Beyond the Standard Model preprint, January 2008

Light Stops from Seiberg Duality text, January 2012

Probing stop pair production at the LHC with graph neural networks journal, August 2019

Magnifying the ATLAS stealth stop splinter: impact of spin correlations and finite widths journal, July 2018

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider journal, October 2015

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider text, January 2015

Magnifying the ATLAS Stealth Stop Splinter: Impact of Spin Correlations and Finite Widths text, January 2018

Light stop in the MSSM after LHC Run 1 journal, September 2015

Parameter inference from event ensembles and the top-quark mass journal, September 2021

Measurements of top-quark pair spin correlations in the $$e\mu $$ channel at $$\sqrt{s} = 13$$ TeV using pp collisions in the ATLAS detector journal, August 2020

Refining light stop exclusion limits with $W^+W^-$ cross sections text, January 2015

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider text, January 2015

Investigating the Quantum Properties of Jets and the Search for a Supersymmetric Top Quark Partner with the ATLAS Detector preprint, January 2016

A stealth supersymmetry sampler
journal, July 2012

Stealth supersymmetry
journal, November 2011

Light stops from Seiberg duality
journal, October 2012

Measurement of the $$t\overline{t}$$ t t ¯ production cross-section using $$e\mu $$ e μ events with $$b$$ b -tagged jets in $$pp$$ p p collisions at $$\sqrt{s}=7$$ s = 7 and 8 TeV with the ATLAS detector
journal, October 2014

Removing Gaps in the Exclusion of Top Squark Parameter Space
journal, November 2014

NNLO corrections to top pair production at hadron colliders: the quark-gluon reaction
journal, January 2013

NNLO corrections to top-pair production at hadron colliders: the all-fermionic scattering channels
journal, December 2012

Percent-Level-Precision Physics at the Tevatron: Next-to-Next-to-Leading Order QCD Corrections to $q \bar{q} \to t \bar{t} + X$
journal, September 2012

Top-pair production at hadron colliders with next-to-next-to-leading logarithmic soft-gluon resummation
journal, April 2012

Spin correlation effects in top quark pair production at the LHC
journal, April 2010

Determination of the top quark mass circa 2013: methods, subtleties, perspectives
journal, October 2014

Herwig++ physics and manual
journal, November 2008

Top++: A program for the calculation of the top-pair cross-section at hadron colliders
journal, November 2014

Parton distributions for the LHC
journal, July 2009

Total Top-Quark Pair-Production Cross Section at Hadron Colliders Through $O (α_{S}^{4})$
journal, June 2013

Supersymmetric top and bottom squark production at hadron colliders
journal, August 2010

Light stop NLSPs at the Tevatron and LHC
journal, August 2011

Rivet user manual
journal, December 2013

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

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

Simulation of Finite Width Effects in Physics Beyond the Standard Model
preprint, January 2008

Light Stops from Seiberg Duality
text, January 2012

Probing stop pair production at the LHC with graph neural networks
journal, August 2019

Magnifying the ATLAS stealth stop splinter: impact of spin correlations and finite widths
journal, July 2018

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
journal, October 2015

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
text, January 2015

Magnifying the ATLAS Stealth Stop Splinter: Impact of Spin Correlations and Finite Widths
text, January 2018

Light stop in the MSSM after LHC Run 1
journal, September 2015

Parameter inference from event ensembles and the top-quark mass
journal, September 2021

Measurements of top-quark pair spin correlations in the $$e\mu $$ channel at $$\sqrt{s} = 13$$ TeV using pp collisions in the ATLAS detector
journal, August 2020

Refining light stop exclusion limits with $W^+W^-$ cross sections
text, January 2015

ATLAS Run 1 searches for direct pair production of third-generation squarks at the Large Hadron Collider
text, January 2015

Investigating the Quantum Properties of Jets and the Search for a Supersymmetric Top Quark Partner with the ATLAS Detector
preprint, January 2016