Double Higgs Production at Colliders Workshop

Name: Double Higgs Production at Colliders Workshop
Start: 2018-09-04T08:00:00-05:00
End: 2018-09-09T09:00:00-05:00
Location: Fermilab

4 Sept 2018, 08:00 → 9 Sept 2018, 09:00 America/Chicago

One West (WH1W) (Fermilab)

One West (WH1W)

Fermilab

Biagio Di Micco (Universita' degli Studi di Roma Tre e Istituto Nazionale di Fisica Nucleare (INFN)), Christoph Peter Englert (University of Glasgow (GB)), Giacomo Ortona (Centre National de la Recherche Scientifique (FR)), John Alison (University of Chicago (US)), Maxime Gouzevitch (Centre National de la Recherche Scientifique (FR)), Olivier Bondu (Universite Catholique de Louvain (UCL) (BE)), Sara Lynn Dawson (Brookhaven National Laboratory (US))

Description

This workshop aims at gathering together both theorists and ATLAS/CMS experimentalists to discuss recent results, analysis techniques and theoretical calculations of HH production.

Recent results from LHC
Advances in theoretical calculations
Analysis techniques
BSM phenomenology
EFT interpretations

Organizing committee:
John Alison (Carnegie Mellon University)
Olivier Bondu (FNRS/CP3-U C Louvain)
Sally Dawson (Brookhaven National Laboratory)
Biagio Di Micco (U/INFN Roma Tre)
Christoph Englert (U Glasgow)
Maxime Gouzevitch (CNRS/UCB Lyon 1-IPNLyon)
Giacomo Ortona (CNRS/LLR)

Local organization committee:
Luca Cadamuro (Florida U)
Marcela Carena (U Chicago/Fermilab)
Jacobo Konigsberg (Florida U)
Zhen Liu (Fermilab/U Maryland-chair)
Caterina Vernieri (Fermilab-chair)

LPC events committee:
Gabriele Benelli (Brown U)
Ben Kreis (Fermilab)
Nicola De Filippis (Politecnico & INFN Bari)

Diversity and inclusion at Fermilab
http://diversity.fnal.gov/policies/

Participants

108 View full list

Tuesday 4 September
- Registration
- Welcome and introduction
  - 1
    
    Welcome to FNAL and LPC
    
    Speakers: Caterina Vernieri (Fermi National Accelerator Lab. (US)), Marcela Carena (Fermilab), Sergo Jindariani (Fermi National Accelerator Lab. (US))
    
    FNAL-HH-welcome.pdf
    
    LPC_in_pictures.pdf
    
    Welcome-HH-2018.pdf
  - 2
    
    Introduction
    
    Speaker: Biagio Di Micco (Universita' degli Studi di Roma Tre e Istituto Nazionale di Fisica Nucleare (INFN))
    
    diHiggs_Fermilab_04_09_2018.pdf
- Summary: LHC status
  
  Conveners: Caterina Vernieri (Fermi National Accelerator Lab. (US)), John Alison (University of Chicago (US))
  - 3
    
    CMS experimental status on hh production search (20+5)
    
    Speaker: Abdollah Mohammadi (Kansas State University (US))
    
    HH_Abdollah.pdf
  - 4
    
    ATLAS experimental status on hh production search (20+5)
    
    Speaker: Marc Escalier (LAL-Orsay (FR))
    
    escalier_HH_workshop_Fermilab.pdf
- 10:30
  
  Coffee break
- Theory overview
  
  Convener: Zhen Liu (Fermilab)
  - 5
    
    Latest SM predictions (25+5)
    
    Speaker: Javier Mazzitelli (University of Zurich)
    
    mazzitelli_hh.pdf
  - 6
    
    Trilinear Higgs self-coupling extraction from single Higgs measurements (25+5)
    
    Speaker: Stefano Di Vita (Università degli Studi e INFN Milano (IT))
    
    divita-trilinear_from_single_h-fermilab_hh_workshop.pdf
  - 7
    
    Trilinear Higgs self-coupling determination from single-Higgs differential measurements (25+5)
    
    Speaker: Ambresh Shivaji (UC Louvain)
    
    Trilinear_Shivaji.pdf
- Summary: Future colliders
  
  Convener: Nicola De Filippis (Politecnico e INFN Bari (IT))
  - 8
    
    HL-LHC projections and YR status (20+5)
    
    Speaker: Stefania Gori (University of Cincinnati (US))
    
    TalkFermilab.pdf
- 13:00
  
  Lunch break
- Summary: Future Colliders
  
  Convener: Nicola De Filippis (Politecnico e INFN Bari (IT))
  - 9
    
    Higgs physics at Future Circular colliders (ee/hh) (25+5)
    
    Speaker: Anadi Canepa (Fermi National Accelerator Lab. (US))
    
    AnadiCanepa_FCC.pdf
  - 10
    
    Higgs physics at ILC/CLIC (25+5)
    
    Speaker: Philipp Roloff (CERN)
    
    double_higgs_colliders_roloff.pdf
- Summary: Combination of single and double Higgs measurements
  
  Conveners: Biagio Di Micco (Universita' degli Studi di Roma Tre e Istituto Nazionale di Fisica Nucleare (INFN)), Maxime Gouzevitch (Centre National de la Recherche Scientifique (FR))
  - 11
    
    ATLAS HH combination results (20+5)
    
    Speaker: Petar Bokan (Uppsala University (SE), Georg-August-Universitaet Goettingen (DE))
    
    HHcombinationATLAS_PetarBokan_180904.pdf
  - 12
    
    CMS HH combination results (20+5)
    
    Speaker: Luca Cadamuro (University of Florida (US))
    
    HH_CMS_Combination.pdf
- 16:00
  
  Coffee break
- Discussion
  
  Conveners: Biagio Di Micco (Universita' degli Studi di Roma Tre e Istituto Nazionale di Fisica Nucleare (INFN)), Javier Mazzitelli (Universidad de Buenos Aires (AR)), John Alison (Carnegie-Mellon University (US)), Dr Ramona Groeber (IPPP Durham)
  ATLAS+CMS combination (Luca C., David W., Javier M., B. Di Micco) - Wednesday Room Ramsey
  
  based on 2015+2016 in preparation of the Run-2 legacy
  
  MC settings (NLO vs LO )
  
  Single H+HH combination
  
  Total cross section vs k_lambda + uncertainties
  
  2) How to make results public (J. Allison, Max S., K. Leney) - Friday 1W (17:30 - 18:30)
  
  Tools to provide unfolded UL
  
  How to handle bbb correlations?
  
  Resonant: Gamma vs Mx plot?
  
  How to reweight different widths?
  
  cut based results
  
  differential results in m_HH (truth vs. reco)
  
  Special care for BDT-based results
  
  3) EFT (S. Di Vita, M. Gouzevitch, J. Robinson) [17:30 - 18:30] 11th floor ROC
  
  Which framework? More operators beyond O6
  
  How to make EFT useful for model testing?
  
  Which inputs from H and HH?
  
  Which topology? ggF/VBF single H background?
  
  Usage of shape benchmarks
  
  4) BSM (M. Carena, K. Tschann-Grimm, Ian Lewis, Lian-Tao Wang, X. Carvalho) Wednesday 11th floor ROC - Room One West
  
  Benchmark models : which one ?
  
  Resonant: Is graviton still a good benchmark?
  
  Interplay with VV
  
  Motivations for H1->H2 h
  
  Interference with SM HH (EWK-S, 2HDM) benchmark
  
  5) ATLAS/CMS objects/analysis strategies (M.Kagan, F. Micheli, C.Vernieri) [Thursday 1W (5:00-5:45)]
  
  Trigger strategies
  
  B-tagging and b-jets (regression)
  
  MET
  
  6) How to improve WWbb (W off-shell) [S. Shrestha, N. De Filippis - Thursday 11 ROC ]
- FERMILAB visit: Welcome Reception
  
  list.pdf
  
  MapsDZero.pdf
  
  NuCamp.png
Wednesday 5 September
- Theory
  
  Convener: Javier Mazzitelli
  - 13
    
    Monte Carlo modelling of HH
    
    Speaker: Eleni Vryonidou (CERN)
    
    hhFermilab.pdf
  - 14
    
    Full NLO QCD corrections to ggF HH production
    
    Speaker: Dr Julien Baglio (University of Tübingen)
    
    baglio_hh_fermilab_2018.pdf
  - 15
    
    Reinterpretation of non-resonant HH searches
    
    Speaker: Anamika Aggarwal (Nikhef National institute for subatomic physics (NL))
    
    HH_FNAL-050918.pdf
- Objects and tools: b-jets
  
  Convener: Michael Aaron Kagan (SLAC National Accelerator Laboratory (US))
  - 16
    
    b-jet energy regression
    
    Speaker: Alexander Melzer (University of Bonn (DE))
    
    HHWS_bJetRegression.pdf
  - 17
    
    b-tagging : current and future performance
    
    Speaker: Dr Luca Mastrolorenzo (Rheinisch Westfaelische Tech. Hoch. (DE))
    
    Chicago_6_09_18_v2.pdf
- Group picture
- 11:00
  
  Coffee break
- Experimental Signatures: H(bb)H(gammagamma)
  
  Conveners: Francesco Micheli (Eidgenoessische Tech. Hochschule Zuerich (ETH)), James Robinson (Deutsches Elektronen-Synchrotron (DE))
  - 18
    
    ATLAS experimental summary
    
    Speaker: Elizabeth Brost (Northern Illinois University (US))
    
    HH_workshop_ATLAS_yybb.pdf
  - 19
    
    CMS experimental summary
    
    Speaker: Maxime Gouzevitch (Centre National de la Recherche Scientifique (FR))
    
    Fermilab_Gouzevitch_HHbbgg.pdf
  - 20
    
    Plans and perspectives for Run II and beyond
    
    Speaker: David Delgove (Centre National de la Recherche Scientifique (FR))
    
    HHWorkshop_DDelgove.pdf
- 13:00
  
  Lunch break
- Experimental Signatures: H(bb)H(bb)
  
  Conveners: Caterina Vernieri (Fermi National Accelerator Lab. (US)), David Wardrope (University College London (UK))
  - 21
    
    b-tagging online, b-jet triggers and future plans
    
    Speaker: John Alison (University of Chicago (US))
    
    BJetTriggerStatusPlans.pdf
  - 22
    
    Identifying boosted H->bb
    
    Speaker: Michael Aaron Kagan (SLAC National Accelerator Laboratory (US))
    
    Kagan_BoostedH_2018.pdf
  - 23
    
    CMS Analysis Strategy, with focus on non-resonant
    
    Speaker: Andres Tiko (Universita e INFN, Padova (IT))
    
    slides_HH4b_Fermilab_tiko.pdf
  - 24
    
    ATLAS Analysis Strategy, with focus on non-resonant
    
    Speaker: Jana Schaarschmidt (University of Washington (US))
    
    ATLAS_4b_strategy.pdf
- 16:00
  
  Coffee break
- Discussion
  ATLAS+CMS combination (Luca C., David W., Javier M., B. Di Micco) - Wednesday Room Ramsey
  
  based on 2015+2016 in preparation of the Run-2 legacy
  
  MC settings (NLO vs LO )
  
  Single H+HH combination
  
  Total cross section vs k_lambda + uncertainties
  
  2) How to make results public (J. Allison, Max S., K. Leney) - Friday 1W (17:30 - 18:30)
  
  Tools to provide unfolded UL
  
  How to handle bbb correlations?
  
  Resonant: Gamma vs Mx plot?
  
  How to reweight different widths?
  
  cut based results
  
  differential results in m_HH (truth vs. reco)
  
  Special care for BDT-based results
  
  3) EFT (S. Di Vita, M. Gouzevitch, J. Robinson) [17:30 - 18:30] 11th floor ROC
  
  Which framework? More operators beyond O6
  
  How to make EFT useful for model testing?
  
  Which inputs from H and HH?
  
  Which topology? ggF/VBF single H background?
  
  Usage of shape benchmarks
  
  4) BSM (M. Carena, K. Tschann-Grimm, Ian Lewis, Lian-Tao Wang, X. Carvalho) Wednesday 11th floor ROC - Room One West
  
  Benchmark models : which one ?
  
  Resonant: Is graviton still a good benchmark?
  
  Interplay with VV
  
  Motivations for H1->H2 h
  
  Interference with SM HH (EWK-S, 2HDM) benchmark
  
  5) ATLAS/CMS objects/analysis strategies (M.Kagan, F. Micheli, C.Vernieri) [Thursday 1W (5:00-5:45)]
  
  Trigger strategies
  
  B-tagging and b-jets (regression)
  
  MET
  
  6) How to improve WWbb (W off-shell) [S. Shrestha, N. De Filippis - Thursday 11 ROC ]
Thursday 6 September
- Experimental Signatures: H(bb)H(tautau)
  
  Conveners: Katharine Leney (University College London (UK)), Luca Cadamuro (University of Florida (US))
  - 25
    
    ATLAS analysis overview
    
    Speaker: Alessandra Betti (University of Bonn (DE))
    
    HHWorkshop_ATLASbbtautau_v3.pdf
  - 26
    
    CMS analysis overview
    
    Speaker: Luca Cadamuro (University of Florida (US))
    
    HH_CMS_bbtt_overview.pdf
  - 27
    
    Trigger strategies for bbtautau
    
    Speaker: Agni Bethani (University of Manchester (GB))
    
    HHatColliders_Agni_bbtautautriggers.pdf
- 10:30
  
  Coffee break
- Experimental Signatures: H(bb)H(tautau)
  
  Conveners: Katharine Leney (University College London (UK)), Luca Cadamuro (University of Florida (US))
  - 28
    
    ATLAS and CMS overview + comparison of selections and fitted variables
    
    Speaker: Arnaud Ferrari (Uppsala University (SE))
    
    HH-Fermilab-AF.pdf
  - 29
    
    ATLAS and CMS overview + comparison of reconstruction and bkg estimation methods **remote**
    
    Speaker: Francesco Brivio (Universita & INFN, Milano-Bicocca (IT))
    
    FBrivio_bbtt_HH2018.pdf
  - 30
    
    Trigger strategies for VBF HHbbtt **remote**
    
    Speaker: Chiara Amendola (LLR - Ecole Polytechnique (FR))
    
    Amendola_DoubleHiggsLHC.pdf
- Theory
  
  Convener: Eleni Vryonidou (CERN)
  - 31
    
    Beyond the Standard Model HH production
    
    Speaker: Ian Lewis (The University of Kansas)
    
    IL_HH_FNAL.pdf
- 13:00
  
  Lunch break
- 14:00
  
  Fermilab director's welcome message
- Theory
  
  Convener: Eleni Vryonidou (CERN)
  - 32
    
    The least studied coupling in (double) Higgs physics
    
    Speaker: Ian Low (Northwestern University)
    
    HH_by_Low.pdf
- Experimental Signatures: H(bb)H(VV)
  
  Conveners: Dr Kuver Sinha (University of Oklahoma), Rami Kamalieddin (University of Nebraska Lincoln (US)), Suyog Shrestha (Ohio State University (US))
  - 33
    
    Theory talk specific to bbVV
    
    Speakers: Dr Jeong Han Kim (University of Kansas), Dr Tathagata Ghosh (University of Hawaii)
    
    Ghosh_bbWW_HH_Fermilab_2018.pdf
    
    hh_Fermilab_bbWW_theory_Jeong_Han_Kim.pdf
  - 34
    
    ATLAS analysis overview: bbWW and bbZZ
    
    Speaker: Gabriel Palacino (Indiana University (US))
    
    hhWWVV_ATLAS_diHiggsWorkshop_20180906.pdf
  - 35
    
    Dedicated object reconstruction techniques for bbVV
    
    Speaker: Jason Robert Veatch (Georg August Universitaet Goettingen (DE))
    
    jveatch_hh_bbVV.pdf
- 16:00
  
  Coffee break
- Experimental Signatures: H(bb)H(VV)
  
  Conveners: Dr Kuver Sinha (University of Oklahoma), Rami Kamalieddin (University of Nebraska Lincoln (US)), Suyog Shrestha (Ohio State University (US))
  - 36
    
    CMS analysis overview : bbZZ
    
    Speaker: Apichart Hortiangtham (Northeastern University (US))
    
    hh_LHC_workshop_2018_09_06_v5.pdf
  - 37
    
    CMS analysis overview : bbWW
    
    Speaker: Tao Huang (Texas A & M University (US))
    
    TaoHHbbWW_HHWorkshop_201809_v2.pdf
- Discussion
  ATLAS+CMS combination (Luca C., David W., Javier M., B. Di Micco) - Wednesday Room Ramsey
  
  based on 2015+2016 in preparation of the Run-2 legacy
  
  MC settings (NLO vs LO )
  
  Single H+HH combination
  
  Total cross section vs k_lambda + uncertainties
  
  2) How to make results public (J. Allison, Max S., K. Leney) - Friday 1W (17:30 - 18:30)
  
  Tools to provide unfolded UL
  
  How to handle bbb correlations?
  
  Resonant: Gamma vs Mx plot?
  
  How to reweight different widths?
  
  cut based results
  
  differential results in m_HH (truth vs. reco)
  
  Special care for BDT-based results
  
  3) EFT (S. Di Vita, M. Gouzevitch, J. Robinson) [17:30 - 18:30] 11th floor ROC
  
  Which framework? More operators beyond O6
  
  How to make EFT useful for model testing?
  
  Which inputs from H and HH?
  
  Which topology? ggF/VBF single H background?
  
  Usage of shape benchmarks
  
  4) BSM (M. Carena, K. Tschann-Grimm, Ian Lewis, Lian-Tao Wang, X. Carvalho) Wednesday 11th floor ROC - Room One West
  
  Benchmark models : which one ?
  
  Resonant: Is graviton still a good benchmark?
  
  Interplay with VV
  
  Motivations for H1->H2 h
  
  Interference with SM HH (EWK-S, 2HDM) benchmark
  
  5) ATLAS/CMS objects/analysis strategies (M.Kagan, F. Micheli, C.Vernieri) [Thursday 1W (5:00-5:45)]
  
  Trigger strategies
  
  B-tagging and b-jets (regression)
  
  MET
  
  6) How to improve WWbb (W off-shell) [S. Shrestha, N. De Filippis - Thursday 11 ROC ]
- FERMILAB visit: Two Brothers Roundhousehttp://twobrothersbrewing.com/restaurants/roundhouse/
  
  list.pdf
  
  MapsDZero.pdf
  
  NuCamp.png
Friday 7 September
- Objects and tools: jets and boosted techniques
  - 38
    
    Substructure for HH signatures
    
    Speaker: Marc Antoine Osherson (Rutgers, State Univ. of New Jersey (US))
    
    HHsubstrc_Sep2018.pdf
  - 39
    
    Jet and MET performance
    
    Speaker: Maximilian J Swiatlowski (University of Chicago (US))
    
    jetmet.pdf
- Theory
  
  Convener: Ian Lewis (The University of Kansas)
  - 40
    
    Exotic decays in HH production
    
    Speaker: Brian Thomas Batell (University of Pittsburgh)
    
    Batell-FNAL-hh.pdf
- 10:30
  
  Coffee break
- Theory
  
  Convener: Ian Lewis (The University of Kansas)
  - 41
    
    BSM multi Higgs
    
    Speaker: Dr Nausheen Shah (Wayne State University)
    
    THE Higgs and more Higgs: Making Sense out of Chaos
- Experimental Signatures: Other signatures
  
  Conveners: Christian Veelken (National Institute of Chemical Physics and Biophysics (EE)), Yaquan Fang (Chinese Academy of Sciences (CN))
  - 42
    
    The analysis of HH->WWgamma gamma with the ATLAS detector
    
    Speaker: Maosen Zhou (Chinese Academy of Sciences (CN))
    
    HH_WWyy_FNAL.pdf
  - 43
    
    HH->WW*WW* analysis with ATLAS detector
    
    Speaker: Liang Li (Shanghai Jiao Tong University (CN))
    
    HH4W_[DoubleHiggsWorkshop]_20180907.pdf
  - 44
    
    Reconstruction of the HH mass in the HH->4tau channel
    
    Speaker: Christian Veelken (National Institute of Chemical Physics and Biophysics (EE))
    
    svFit4tau_2018Sep07v1.pdf
  - 45
    
    The analysis of HH->4tau with the CMS detector
    
    Speaker: Saswati Nandan (Saha Institute of Nuclear Physics (IN))
    
    HHTo4tau.pdf
- 13:00
  
  Lunch break
- Experimental Signatures: Combination and other common topics
  
  Conveners: Arnaud Ferrari (Uppsala University (SE)), Maxime Gouzevitch (Centre National de la Recherche Scientifique (FR))
  - 46
    
    Interferences in searches for heavy Higgs bosons
    
    Speaker: Stefan Rainer Liebler (KIT - Karlsruhe Institute of Technology (DE))
    
    Interference_Liebler.pdf
  - 47
    
    ggHH generation and benchmarks
    
    Speakers: Alexandra Carvalho Antunes De Oliveira (Universita e INFN, Padova (IT)), Alexandra Carvalho Antunes De Oliveira (Universita e INFN, Padova (IT))
    
    HH_LHC_WS_Sep2018.pdf
  - 48
    
    VBF HH generation and benchmarks
    
    Speaker: Tyler James Burch (Northern Illinois University (US))
    
    vbf_hh_burch2018_final.pdf
  - 49
    
    Interference effects in the alignement scenario
    
    Speaker: Marcela Carena (Fermilab)
    
    slides.pdf
- Theory overview: Wine and Cheese
  - 15:30
    
    Wine&Cheese
  - 50
    
    Reflections on Double Higgs Production at the LHC
    
    Speaker: Carlos E.M. Wagner (University of Chicago / Argonne National Laboratory)
    
    Fermilab.WC.09.18.pdf
- Discussion
Saturday 8 September
- Summary
  - 51
    
    Experimental summary
    
    Speaker: Caterina Vernieri (Fermi National Accelerator Lab. (US))
    
    HH-workshop-experimentalsummary.pdf
  - 52
    
    Theory summary
    
    Speaker: Brian Thomas Batell
    
    Batell-HH-Theory-Summary.pdf
- 10:30
  
  Coffee break
- Theory: Discussion Summary, White Paper and Follow-Ups
  - 53
    
    Summary of discussion paper and white paper
    
    Speaker: Biagio Di Micco (Universita' degli Studi di Roma Tre e Istituto Nazionale di Fisica Nucleare (INFN))
    
    pres_discussione.pdf
- 12:00
  
  Lunch break
- FERMILAB visit
  
  list.pdf
  
  MapsDZero.pdf
  
  NuCamp.png