Higgs and Z assisted stop searches at hadron colliders
Abstract
Current searches for the light top squark (stop) mostly focus on the decay channels of \( \tilde{t}\to t{\chi}_1^0 \) or \( \tilde{t}\to b{\chi}_1^{\pm}\to bW{\chi}_1^0 \) , leading to Open image in new window final states for stop pair productions at the LHC. However, in supersymmetric scenarios with light neutralinos and charginos other than the neutralino lightest supersymmetric particle (LSP), more than one decay mode of the stop could be dominant. While those new decay modes could significantly weaken the current stop search limits at the LHC, they also offer alternative discovery channels for stop searches. In this paper, we studied the scenario with light Higgsino next-to-LSPs (NLSPs) and Bino LSP. The light stop decays primarily via \( {\tilde{t}}_1\to t{\chi}_2^0/{\chi}_3^0 \) , with the neutralinos subsequent decaying to a Z boson or a Higgs boson: χ 2° /χ 3 ° → χ 1 ° h/Z. Pair production of light stops at the LHC leads to final states of Open image in new window or Open image in new window . We consider three signal regions: one charged lepton (1ℓ), two opposite sign charged leptons (2 OS ℓ) and at least three charged leptons (≥3ℓ). We found that the 1ℓ signal regionmore »
- Authors:
-
- Univ. of Arizona, Tucson, AZ (United States). Dept. of Physics
- Univ. of Arizona, Tucson, AZ (United States). Steward Observatory
- Publication Date:
- Research Org.:
- Univ. of Arizona, Tucson, AZ (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1507710
- Grant/Contract Number:
- FG02-04ER41298
- 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: 2018; Journal Issue: 5; Journal ID: ISSN 1029-8479
- Publisher:
- Springer Berlin
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; Supersymmetry Phenomenology
Citation Formats
Su, Shufang, and Zhang, Huanian. Higgs and Z assisted stop searches at hadron colliders. United States: N. p., 2018.
Web. doi:10.1007/jhep05(2018)135.
Su, Shufang, & Zhang, Huanian. Higgs and Z assisted stop searches at hadron colliders. United States. https://doi.org/10.1007/jhep05(2018)135
Su, Shufang, and Zhang, Huanian. Tue .
"Higgs and Z assisted stop searches at hadron colliders". United States. https://doi.org/10.1007/jhep05(2018)135. https://www.osti.gov/servlets/purl/1507710.
@article{osti_1507710,
title = {Higgs and Z assisted stop searches at hadron colliders},
author = {Su, Shufang and Zhang, Huanian},
abstractNote = {Current searches for the light top squark (stop) mostly focus on the decay channels of \( \tilde{t}\to t{\chi}_1^0 \) or \( \tilde{t}\to b{\chi}_1^{\pm}\to bW{\chi}_1^0 \) , leading to Open image in new window final states for stop pair productions at the LHC. However, in supersymmetric scenarios with light neutralinos and charginos other than the neutralino lightest supersymmetric particle (LSP), more than one decay mode of the stop could be dominant. While those new decay modes could significantly weaken the current stop search limits at the LHC, they also offer alternative discovery channels for stop searches. In this paper, we studied the scenario with light Higgsino next-to-LSPs (NLSPs) and Bino LSP. The light stop decays primarily via \( {\tilde{t}}_1\to t{\chi}_2^0/{\chi}_3^0 \) , with the neutralinos subsequent decaying to a Z boson or a Higgs boson: χ 2° /χ 3 ° → χ 1 ° h/Z. Pair production of light stops at the LHC leads to final states of Open image in new window or Open image in new window . We consider three signal regions: one charged lepton (1ℓ), two opposite sign charged leptons (2 OS ℓ) and at least three charged leptons (≥3ℓ). We found that the 1ℓ signal region of channel Open image in new window has the best reach sensitivity for light stop searches. For 14 TeV LHC with 300 fb-1 integrated luminosity, a stop mass up to 900 GeV can be discovered at 5σ significance, or up to 1050 GeV can be excluded at 95% C.L. Combining all three decay channels for 1ℓ signal region extends the reach for about 100–150 GeV. We also studied the stop reach at the 100 TeV pp collider with 3 ab-1 luminosity, with discovery and exclusion reach being 6 TeV and 7 TeV, respectively.},
doi = {10.1007/jhep05(2018)135},
journal = {Journal of High Energy Physics (Online)},
number = 5,
volume = 2018,
place = {United States},
year = {Tue May 22 00:00:00 EDT 2018},
month = {Tue May 22 00:00:00 EDT 2018}
}
Figures / Tables:
Works referenced in this record:
Approximate NNLO predictions for the stop-pair production cross section at the LHC
text, January 2013
- Broggio, Alessandro; Ferroglia, Andrea; Neubert, Matthias
- ETH Zurich
A Supersymmetry Primer
book, April 2010
- Martin, Stephen P.
- Advanced Series on Directions in High Energy Physics
Updated predictions for the total production cross sections of top and of heavier quark pairs at the Tevatron and at the LHC
journal, September 2008
- Cacciari, Matteo; Frixione, Stefano; Mangano, Michelangelo M.
- Journal of High Energy Physics, Vol. 2008, Issue 09
Minimal kinematic constraints and m T 2
journal, December 2008
- Cheng, Hsin-Chia; Han, Zhenyu
- Journal of High Energy Physics, Vol. 2008, Issue 12
Effective potential methods and the Higgs mass spectrum in the MSSM
journal, February 1996
- Carena, M.; Quirós, M.; Wagner, C. E. M.
- Nuclear Physics B, Vol. 461, Issue 3
The anti- k t jet clustering algorithm
journal, April 2008
- Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
- Journal of High Energy Physics, Vol. 2008, Issue 04
Boosting stop searches with a 100 TeV proton collider
journal, November 2014
- Cohen, Timothy; D’Agnolo, Raffaele Tito; Hance, Mike
- Journal of High Energy Physics, Vol. 2014, Issue 11
Complex decay chains of top and bottom squarks
journal, July 2015
- Eckel, Jonathan; Su, Shufang; Zhang, Huanian
- Journal of High Energy Physics, Vol. 2015, Issue 7
Approximate NNLO predictions for the stop-pair production cross section at the LHC
journal, July 2013
- Broggio, Alessandro; Ferroglia, Andrea; Neubert, Matthias
- Journal of High Energy Physics, Vol. 2013, Issue 7
A variable for measuring masses at hadron colliders when missing energy is expected; m T 2 : the truth behind the glamour
journal, September 2003
- Barr, Alan; Lester, Christopher; Stephens, Phil
- Journal of Physics G: Nuclear and Particle Physics, Vol. 29, Issue 10
Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
journal, September 2012
- Chatrchyan, S.; Khachatryan, V.; Sirunyan, A. M.
- Physics Letters B, Vol. 716, Issue 1
Search for the pair production of third-generation squarks with two-body decays to a bottom or charm quark and a neutralino in proton–proton collisions at
journal, March 2018
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- Physics Letters B, Vol. 778
Search for supersymmetry in proton-proton collisions at 13 TeV using identified top quarks
journal, January 2018
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- Physical Review D, Vol. 97, Issue 1
Squark and gluino production cross sections in $$pp$$ p p collisions at $$\sqrt{s} = 13, 14, 33$$ s = 13 , 14 , 33 and $$100$$ 100 TeV
journal, December 2014
- Borschensky, Christoph; Krämer, Michael; Kulesza, Anna
- The European Physical Journal C, Vol. 74, Issue 12
Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
journal, September 2012
- Aad, G.; Abajyan, T.; Abbott, B.
- Physics Letters B, Vol. 716, Issue 1
Analytical expressions for radiatively corrected Higgs masses and couplings in the MSSM
journal, July 1995
- Carena, M.; Espinosa, J. R.; Quirós, M.
- Physics Letters B, Vol. 355, Issue 1-2
Search for direct top squark pair production in final states with two leptons in $$\sqrt{s} = 13$$ s = 13 TeV pp collisions with the ATLAS detector
journal, December 2017
- Aaboud, M.; Aad, G.; Abbott, B.
- The European Physical Journal C, Vol. 77, Issue 12
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
Confidence level computation for combining searches with small statistics
journal, September 1999
- Junk, Thomas
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 434, Issue 2-3
Next-to-leading order QCD corrections to <mml:math altimg="si1.gif" overflow="scroll" xmlns:xocs="http://www.elsevier.com/xml/xocs/dtd" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://www.elsevier.com/xml/ja/dtd" xmlns:ja="http://www.elsevier.com/xml/ja/dtd" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:tb="http://www.elsevier.com/xml/common/table/dtd" xmlns:sb="http://www.elsevier.com/xml/common/struct-bib/dtd" xmlns:ce="http://www.elsevier.com/xml/common/dtd" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:cals="http://www.elsevier.com/xml/common/cals/dtd"><mml:mi>t</mml:mi><mml:mover accent="true"><mml:mi>t</mml:mi><mml:mo>¯</mml:mo></mml:mover><mml:mi>Z</mml:mi></mml:math> production at the LHC
journal, August 2008
- Lazopoulos, Achilleas; McElmurry, Thomas; Melnikov, Kirill
- Physics Letters B, Vol. 666, Issue 1
Search for top squarks and dark matter particles in opposite-charge dilepton final states at
journal, February 2018
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- Physical Review D, Vol. 97, Issue 3
Measuring masses of semi-invisibly decaying particle pairs produced at hadron colliders
journal, September 1999
- Lester, C. G.; Summers, D. J.
- Physics Letters B, Vol. 463, Issue 1
A light sneutrino rescues the light stop
journal, April 2017
- Chala, M.; Delgado, A.; Nardini, G.
- Journal of High Energy Physics, Vol. 2017, Issue 4
MSSM Higgs bosons at the LHC
journal, June 2012
- Christensen, Neil; Han, Tao; Su, Shufang
- Physical Review D, Vol. 85, Issue 11
A light sneutrino rescues the light stop
text, January 2017
- Chala, M.; Quirós, M.; Delgado, A.
- Springer
Search for top-squark pairs decaying into Higgs or Z bosons in pp collisions at
journal, September 2014
- Khachatryan, V.; Sirunyan, A. M.; Tumasyan, A.
- Physics Letters B, Vol. 736
The soft supersymmetry-breaking Lagrangian: theory and applications
journal, February 2005
- Chung, D.; Everett, L.; Kane, G.
- Physics Reports, Vol. 407, Issue 1-3
The automated computation of tree-level and next-to-leading order differential cross sections, and their matching to parton shower simulations
text, January 2014
- Alwall, J.; Frederix, R.; Frixione, S.
- Springer
Stop and sbottom search using dileptonic MT2 variable and boosted top technique at the LHC
journal, October 2013
- Chakraborty, Amit; Ghosh, Dilip Kumar; Ghosh, Diptimoy
- Journal of High Energy Physics, Vol. 2013, Issue 10
Search for new phenomena with the $$M_{\mathrm {T2}}$$ M T 2 variable in the all-hadronic final state produced in proton–proton collisions at $$\sqrt{s} = 13$$ s = 13 $$\,\text {TeV}$$ TeV
journal, October 2017
- Sirunyan, A. M.; Tumasyan, A.; Adam, W.
- The European Physical Journal C, Vol. 77, Issue 10
A 125 GeV SM-like Higgs in the MSSM and the γγ rate
journal, March 2012
- Carena, Marcela; Gori, Stefania; Shah, Nausheen R.
- Journal of High Energy Physics, Vol. 2012, Issue 3
PYTHIA 6.4 physics and manual
journal, May 2006
- Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
- Journal of High Energy Physics, Vol. 2006, Issue 05
DELPHES 3: a modular framework for fast simulation of a generic collider experiment
journal, February 2014
- de Favereau, J.; Delaere, C.; Demin, P.
- Journal of High Energy Physics, Vol. 2014, Issue 2
$$ t\overline t {W^{\pm }} $$ production and decay at NLO
journal, July 2012
- Campbell, John M.; Ellis, R. Keith
- Journal of High Energy Physics, Vol. 2012, Issue 7
Matching matrix elements and shower evolution for top-pair production in hadronic collisions
journal, January 2007
- Mangano, Michelangelo L.; Moretti, Mauro; Piccinini, Fulvio
- Journal of High Energy Physics, Vol. 2007, Issue 01
The anti-k_t jet clustering algorithm
text, January 2008
- Cacciari, Matteo; Salam, Gavin P.; Soyez, Gregory
- arXiv
Supersymmetric top and bottom squark production at hadron colliders
text, January 2010
- Beenakker, Wim; Brensing, Silja; Krämer, Michael
- arXiv
Stop and sbottom search using dileptonic $M_{T2}$ variable and boosted top technique at the LHC
text, January 2013
- Chakraborty, Amit; Ghosh, Dilip Kumar; Ghosh, Diptimoy
- arXiv
Complex decay chains of top and bottom squarks
preprint, January 2014
- Eckel, Jonathan; Su, Shufang; Zhang, Huanian
- arXiv
A light sneutrino rescues the light stop
text, January 2017
- Chala, Mikael; Delgado, Antonio; Nardini, Germano
- arXiv
Effective potential methods and the Higgs mass spectrum in the MSSM
text, January 1995
- Carena, M.; Quiros, M.; Wagner, C. E. M.
- arXiv
Figures / Tables found in this record: