DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Anatomy of $tthh$ physics at the HL-LHC

Abstract

The t t h h production at colliders contains rich information on the nature of the Higgs boson. In this article, we systematically studied its physics at the high-luminosity Large Hadron Collider (HL-LHC), using exclusive channels with multiple ( 5 ) b -jets and one lepton ( 5 b 1 ), multiple ( 5 ) b -jets and opposite-sign dilepton ( 5 b 2 ), same-sign dilepton ( SS 2 ), multiple leptons (multi- ), and ditau resonance ( τ τ ). The scenarios analyzed include: (1) the t t h h production in Standard Model; (2) the t t h h production mediated by anomalous cubic Higgs self-coupling and t t h h contact interaction; (3) heavy Higgs ( H ) production with t t H t t h h ; and (4) pair production of fermionic top partners ( T ) with T T t t h h . To address the complication of event topologies and the mess of combinatorial backgrounds, a tool of boosted-decision-tree was applied in the analyses. The 5 b 1 and SS 2 analyses define the two most promising channels. For the nonresonant t t h h production, a combination of these exclusive analyses allows for its measurement in the SM with a statistical significance ~ 0.9 σ (with S / B > 1 % ), and may partially break the sensitivity degeneracy with respect to a varying cubic Higgs self-coupling, a difficulty usually thought to exist in gluon fusion di-Higgs analysis at HL-LHC. These sensitivities were also projected to future hadron colliders at 27 TeV and 100 TeV. For the resonant t t h h productions, the heavy Higgs boson in type II two-Higgs-doublet-model could be efficiently searched for between the mass thresholds 2 m h < m H < 2 m t and even beyond that, for relatively small tan β (vacuum alignment), while the fermionic top partners in composite Higgs models could be probed up to ~ 1.5 TeV and ~ 1.7 TeV , for Br ( T t h ) = 25 % and 50%, respectively.

Authors:
; ; ORCiD logo
Publication Date:
Research Org.:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), High Energy Physics (HEP); Research Grants Council (RGC)
OSTI Identifier:
1607819
Alternate Identifier(s):
OSTI ID: 1638684
Report Number(s):
arXiv:1905.03772; FERMILAB-PUB-19-721-T
Journal ID: ISSN 2470-0010; PRVDAQ; 055043
Grant/Contract Number:  
AC02-07CH11359; 16312716
Resource Type:
Published Article
Journal Name:
Physical Review D
Additional Journal Information:
Journal Name: Physical Review D Journal Volume: 101 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

Li, Lingfeng, Li, Ying-Ying, and Liu, Tao. Anatomy of $tthh$ physics at the HL-LHC. United States: N. p., 2020. Web. doi:10.1103/PhysRevD.101.055043.
Li, Lingfeng, Li, Ying-Ying, & Liu, Tao. Anatomy of $tthh$ physics at the HL-LHC. United States. https://doi.org/10.1103/PhysRevD.101.055043
Li, Lingfeng, Li, Ying-Ying, and Liu, Tao. Tue . "Anatomy of $tthh$ physics at the HL-LHC". United States. https://doi.org/10.1103/PhysRevD.101.055043.
@article{osti_1607819,
title = {Anatomy of $tthh$ physics at the HL-LHC},
author = {Li, Lingfeng and Li, Ying-Ying and Liu, Tao},
abstractNote = {The tthh production at colliders contains rich information on the nature of the Higgs boson. In this article, we systematically studied its physics at the high-luminosity Large Hadron Collider (HL-LHC), using exclusive channels with multiple (≥5) b-jets and one lepton (5b1ℓ), multiple (≥5) b-jets and opposite-sign dilepton (5b2ℓ), same-sign dilepton (SS2ℓ), multiple leptons (multi-ℓ), and ditau resonance (ττ). The scenarios analyzed include: (1) the tthh production in Standard Model; (2) the tthh production mediated by anomalous cubic Higgs self-coupling and tthh contact interaction; (3) heavy Higgs (H) production with ttH→tthh; and (4) pair production of fermionic top partners (T) with TT→tthh. To address the complication of event topologies and the mess of combinatorial backgrounds, a tool of boosted-decision-tree was applied in the analyses. The 5b1ℓ and SS2ℓ analyses define the two most promising channels. For the nonresonant tthh production, a combination of these exclusive analyses allows for its measurement in the SM with a statistical significance ~0.9σ (with S/B>1%), and may partially break the sensitivity degeneracy with respect to a varying cubic Higgs self-coupling, a difficulty usually thought to exist in gluon fusion di-Higgs analysis at HL-LHC. These sensitivities were also projected to future hadron colliders at 27 TeV and 100 TeV. For the resonant tthh productions, the heavy Higgs boson in type II two-Higgs-doublet-model could be efficiently searched for between the mass thresholds 2mh<mH<2mt and even beyond that, for relatively small tanβ (vacuum alignment), while the fermionic top partners in composite Higgs models could be probed up to ~1.5 TeV and ~1.7 TeV, for Br(T→th)=25% and 50%, respectively.},
doi = {10.1103/PhysRevD.101.055043},
journal = {Physical Review D},
number = 5,
volume = 101,
place = {United States},
year = {2020},
month = {3}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record
https://doi.org/10.1103/PhysRevD.101.055043

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

Higgs boson pair production at future hadron colliders: From kinematics to dynamics
journal, June 2018


Effective field theory analysis of double Higgs boson production via gluon fusion
journal, August 2015


Higgs self-coupling as a probe of the electroweak phase transition
journal, September 2008


Composite Higgs boson pair production at the LHC
journal, June 2011


Anomalous couplings in double Higgs production
journal, August 2012

  • Contino, Roberto; Ghezzi, Margherita; Moretti, Mauro
  • Journal of High Energy Physics, Vol. 2012, Issue 8
  • DOI: 10.1007/JHEP08(2012)154

LHC search of new Higgs boson via resonant di-Higgs production with decays into 4W
journal, June 2018

  • Ren, Jing; Xiao, Rui-Qing; Zhou, Maosen
  • Journal of High Energy Physics, Vol. 2018, Issue 6
  • DOI: 10.1007/JHEP06(2018)090

Light custodians in natural composite Higgs models
journal, March 2007


Measurement of the triple Higgs coupling at a HE-LHC
journal, March 2019


MadGraph 5: going beyond
journal, June 2011

  • Alwall, Johan; Herquet, Michel; Maltoni, Fabio
  • Journal of High Energy Physics, Vol. 2011, Issue 6
  • DOI: 10.1007/JHEP06(2011)128

A brief introduction to PYTHIA 8.1
journal, June 2008

  • Sjöstrand, Torbjörn; Mrenna, Stephen; Skands, Peter
  • Computer Physics Communications, Vol. 178, Issue 11
  • DOI: 10.1016/j.cpc.2008.01.036

Heavy Higgs bosons at low tan β: from the LHC to 100 TeV
journal, January 2017

  • Craig, Nathaniel; Hajer, Jan; Li, Ying-Ying
  • Journal of High Energy Physics, Vol. 2017, Issue 1
  • DOI: 10.1007/JHEP01(2017)018

Scrutinizing the alignment limit in two-Higgs-doublet models: m h = 125 GeV
journal, October 2015


Revisiting the t t ¯ h h channel at the FCC-hh
journal, October 2019


Twin Turtles
journal, February 2019

  • Asadi, Pouya; Craig, Nathaniel; Li, Ying-Ying
  • Journal of High Energy Physics, Vol. 2019, Issue 2
  • DOI: 10.1007/JHEP02(2019)138

Double take on new physics in double Higgs boson production
journal, July 2014


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
  • DOI: 10.1007/JHEP02(2014)057

Constraints on the quartic Higgs self-coupling from double-Higgs production at future hadron colliders
journal, October 2019

  • Bizoń, Wojciech; Haisch, Ulrich; Rottoli, Luca
  • Journal of High Energy Physics, Vol. 2019, Issue 10
  • DOI: 10.1007/JHEP10(2019)267

Higgs pair production at the LHC with NLO and parton-shower effects
journal, May 2014


Resonant heavy Higgs searches at the HL-LHC
journal, September 2019

  • Adhikary, Amit; Banerjee, Shankha; Barman, Rahool Kumar
  • Journal of High Energy Physics, Vol. 2019, Issue 9
  • DOI: 10.1007/JHEP09(2019)068

Higgs self-coupling measurements at a 100 TeV hadron collider
journal, February 2015

  • Barr, Alan J.; Dolan, Matthew J.; Englert, Christoph
  • Journal of High Energy Physics, Vol. 2015, Issue 2
  • DOI: 10.1007/JHEP02(2015)016

The minimal composite Higgs model
journal, July 2005


Probing new physics of cubic Higgs boson interaction via Higgs pair production at hadron colliders
journal, January 2016


The strongly-interacting light Higgs
journal, June 2007

  • Giudice, Gian Francesco; Grojean, Christophe; Pomarol, Alex
  • Journal of High Energy Physics, Vol. 2007, Issue 06
  • DOI: 10.1088/1126-6708/2007/06/045

Identifying top partners at LHC
journal, November 2009


Probing the quartic Higgs boson self-interaction
journal, November 2018


Evidence for the associated production of the Higgs boson and a top quark pair with the ATLAS detector
journal, April 2018


Second stop and sbottom searches with a stealth stop
journal, November 2016

  • Cheng, Hsin-Chia; Li, Lingfeng; Qin, Qin
  • Journal of High Energy Physics, Vol. 2016, Issue 11
  • DOI: 10.1007/JHEP11(2016)181

HE-LHC: The High-Energy Large Hadron Collider: Future Circular Collider Conceptual Design Report Volume 4
journal, July 2019

  • Abada, A.; Abbrescia, M.; AbdusSalam, S. S.
  • The European Physical Journal Special Topics, Vol. 228, Issue 5
  • DOI: 10.1140/epjst/e2019-900088-6

Double Higgs production and quadratic divergence cancellation in little Higgs models with T-parity
journal, May 2006


HDECAY: a program for Higgs boson decays in the Standard Model and its supersymmetric extension
journal, January 1998


Automatic spin-entangled decays of heavy resonances in Monte Carlo simulations
journal, March 2013

  • Artoisenet, Pierre; Frederix, Rikkert; Mattelaer, Olivier
  • Journal of High Energy Physics, Vol. 2013, Issue 3
  • DOI: 10.1007/JHEP03(2013)015

Observation of Higgs boson production in association with a top quark pair at the LHC with the ATLAS detector
journal, September 2018


Higgs-boson-pair production H ( b b ¯ ) H ( γ γ ) from gluon fusion at the HL-LHC and HL-100 TeV hadron collider
journal, November 2019


Di-Higgs phenomenology in t t ¯ h h : The forgotten channel
journal, April 2015


Jet trimming
journal, February 2010

  • Krohn, David; Thaler, Jesse; Wang, Lian-Tao
  • Journal of High Energy Physics, Vol. 2010, Issue 2
  • DOI: 10.1007/JHEP02(2010)084

Constraining the Higgs self-couplings at e+e− colliders
journal, July 2018

  • Maltoni, Fabio; Pagani, Davide; Zhao, Xiaoran
  • Journal of High Energy Physics, Vol. 2018, Issue 7
  • DOI: 10.1007/JHEP07(2018)087

Search for new phenomena in events with same-charge leptons and b-jets in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector
journal, December 2018