HL/HE-LHC Physics Workshop -- WG 3: BSM

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Working group meetings:

WG conveners:

Patrick J. Fox and Riccardo Torre (TH), Monica D'Onofrio (ATLAS), Keith Ulmer (CMS), Xabier Cid Vidal (LHCb)

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Draft Table of Contents of report:

The table of content is based on the input collected so far in this online spreadsheet. That does not yet included all experimental studies already done or in progress [being updated].

  1. Introduction and overview
    1. New Physics models
    2. Analysis methods and approaches
    3. Treatment of systematic uncertainties
  2. Supersymmetry
    1. generic searches for SUSY
      1. Prospects for realistic SUSY models at the HL-/HE-LHC (S. Heinemeyer et al.)
      2. Probing SUSY at HL- and HE-LHC (T. Han et al.)
      3. Supersymmetry at a 28 TeV hadron collider: HE-LHC (A. Aboubrahim, P. Nath)
    2. SUSY strong production
      1. SUSY strong - improved searches for squark/gluinos (ATLAS)
      2. Prospects for third generation squark production at the HL-LHC and HE-LHC (I. Vivarelli et al. ATLAS)
      3. same-sign dilepton SUSY (CMS)
      4. Implications of a Stop Sector Signal at the LHC (A. Pierce et al.)
    3. SUSY EWK production
      1. Prospects for C1N2 via WZ and Wh in multilepton at the HL-LHC and HE-LHC (A. de Santo et al. ATLAS)
      2. Prospects for chargino pair production at HL- and HE-LHC (S. Carra' et al. ATLAS)
      3. Search for charg-neut in Wh channel using 1Lbb final states (M. D'Onofrio et al. ATLAS)
      4. Prospects for direct stau production at the HL-LHC (C. Zhung et al ATLAS)
      5. Prospects for direct stau production at the HL-LHC (CMS)
      6. Compressed electroweakinos at HL- and HE-LHC (S. Amoroso et al. ATLAS)
      7. Prospects for radiative natural SUSy at HL- and HE-LHC (H. Baer et al.)
      8. Constraining slepton and chargino through compressed top squark search (P. Konar et al.)
      9. light Higgsino - ISR + 2leptons and VBS + 2leptons (CMS)
  3. Dark Matter searches
    1. DM + jets
      1. Prospects for DM interpretations in jet+MET analysis at HL/HE-HLC (C. Gustavino et al. ATLAS)
      2. Monojet searches for DM (CMS)
    2. DM + ttbar / bbbar
      1. Prospects for associated production of dark matter and top quark pairs at the HL-LHC (F. Meloni et al. ATLAS)
      2. Prospects for associated production of dark matter and bottom quark pairs at the HL-LHC (M. McDonald et al. ATLAS)_
      3. HL/HE-HLC prospect for determining the CP nature of spin-0 mediators in associated production of dark matter and top pairs (U. Haisch et al.)
    3. DM + single top
      1. HL/HE-HLC prospect for DM and a single top-quark production in a 2HDM model with a pseudoscalar mediator (P. Pani et al.)
      2. Sudies of DM production in single-top events (CMS)
      3. Sudies of DM production in single-top events (ATLAS)
    4. More models expected to be targeted
      1. Prospects for pure WIMP (pure triplet) Dark Matter at HL-LHC (L. Carminati et al. ATLAS)
      2. Search of Higgs portal dark matter models at HL/HE-LHC (Y.G.Kim et al.)
      3. Prospects for 4 top signatures at the HL/HE-LHC (P. Pani, F. Meloni)
  4. Long Lived particles
    1. Prospects for disappearing track analysis at HL-LHC (J. Anders et al. ATLAS)
    2. Prospects for disappearing track analysis at HE-LHC (M. Saito et al.)
    3. displaced vertex
      1. Prospects for LLP->DV+MET (L. Jeanty et al. ATLAS)
      2. displaced muons (CMS)
      3. Prospects for LLP->mu+jets at the HL-LHC (X. Cid Vidal et al. LHCb)
      4. Prospects for LLP->dijets at the HL-LHC (X. Cid Vidal et al. LHCb)
    4. heavy stable charged particles (dE/dx and TOF) (CMS)
    5. fast timing signatures for long-lived particles (CMS)
    6. various interpretations
      1. Searching for Confining Hidden Valleys at the LHCb and ATLAS/CMS (A. Pierce et al.)
  5. Dark sector: dark photons
    1. Searching for dark photons via Higgs-boson production at the HL-LHC and HE-LHC (S. Biswas et al.)
    2. Axion-like particles at the LHC (A. Mariotti et al.)
    3. Prospects for long-lived dark-photon decays (lepton-jets) at HL-LHC and HE-LHC (C. Sebastiani et al. ATLAS)
    4. Prospects for dark-photon at the HL-LHCb (M. Williams et al, LHCb)
  • Heavy resonances
    1. Precision searches in dijets at the HL-LHC and HE-LHC (S. Chekanov et al.)
    2. Prospects for diboson resonance at HL-LHC and HE-LHC (R. Les et al. ATLAS)
    3. Improving sensitivity to heavy resonance decaying 4 leptons at the HL-/HE-LHC (D. Debnath et al.)
    4. Search for heavy composite majorana neutrino (M.Presilla, R.Leonardi et al. CMS)
  • VLQ
    1. Radiative Decays of Top-partners at the LHC (H. Alhazmi et al.)
    2. Vectorlike quarks and leptons in extended Higgs sector (R. Dermisek et al.)
    3. VLQs at HL- and HE-LHC: discovery and characterization (D. Barducci, L. Panizzi)
    4. Vector-like quark discovery reach (S.Khalil et al. CMS)
  • Flavor-related studies [to be discussed]
    1. neutrino mass models
    2. Z'/lepto-quark from B decays
  • Conclusions and outlook
  • Instructions to add your contribution to the BSM (WG3) chapter

    To collect all contributions, we've prepared an overleaf project in this link,


    which corresponds to the whole BSM chapter (corresponding to WG3). You should all have the right to edit it. Overleaf is a platform that allows on-line edition (similar to google docs) and it compiles latex documents automatically. For now, we've just got a skeleton of the chapter with different sections and subsections embedded. On the right hand side you'll see a preview of the pdf document generated and in the left hand side, the source of the document. Here you can find a draft of the pdf document.

    If, in the right hand side, you click in the pdf document in the section where your name appears, the source corresponding to it will open automatically. If you can't find your name and/or contribution, please let us know. Moreover, we'd ask you to only edit the subsection corresponding to your name.

    • If you want to add images you should click on "PROJECT" in the top left hand side, look for the img folder corresponding to your section, right click on top of it and "Upload from computer".
    • In the same regard, if you want to edit the bibtex, go to your section, bib folder, and edit the corresponding section.bib. Please, add all references in Inspires format, keeping the original key, or CDS format for experimental detector references.
    • If you need a new latex package, not included already, please go to the root folder in the structure that appears after clicking in "PROJECT". Then look for report.tex and add your package on top. There's no need to install any package, overleaf should include the most popular ones.
    In the Introduction of this pdf you'll find few more instruction on how to deal with the images and references. Please have a look.

    In case of doubt, do not hesitate to contact us.

    Gluino pair production cross-sections at 14 TeV

    For convenience we report here the gluino pair-production cross-section calculation for gluino masses up to 3.9 TeV for proton-proton collisions at 14 TeV.

    The cross-sections up to 3.5 TeV have been calculated at NLO including NLL corrections using NLL-fast with decoupled squarks.

    For masses above 3.5 TeV, the NLO calculation from NLL-fast has been scaled extrapolating the NLO+NLL / NLO ratio computed up to 3.5 TeV. Such ratio is to good approximation linear for masses above 1.5 TeV and has been fit to y = a*mass + b, with a = 0.000138105 / GeV and b = 0.9372957921. The fit is shown in the figure attached to this twiki.

    A scale uncertainty (combined renormalization/factorization scale, both set to Q) is evaluated by taking the difference in cross section between mu = 2Q and mu = Q, and between mu = Q/2 and mu = Q (resulting in asymmetric uncertainties). A PDF uncertainty is evaluated using both CTEQ and MSTW PDFs by calculating the cross-section for each included variation (once up (+) and once down(-), keeping all others fixed) which leads to 44 + 40 different outcomes of the cross-section which are turned into an asymmetric uncertainty. A combined PDF and Strong coupling (α_s) uncertainty is defined as one half of the difference between the cross-section one gets using the two extreme CTEQ6.6AS variations, AS-2 and AS+2: ∆σ[α_s] = 1/2 * | σ[AS-2] - σ[AS+2] |.

    Uncertainties have been calculated from scale and PDF variations. Afterwards they have been divided by a factor of two, according to recommendations to emulate the expected uncertainty that could be achieved in the future.

    Gluino mass (GeV) Cross section (pb) Relative uncertainty
    600 12.06 0.07
    800 2.001 0.07
    1000 0.4537 0.08
    1100 0.2334 0.085
    1200 0.1235 0.09
    1300 0.06793 0.09
    1400 0.03819 0.1
    1500 0.02184 0.105
    1600 0.01275 0.11
    1700 0.007557 0.12
    1800 0.004551 0.13
    1900 0.002761 0.135
    2000 0.001694 0.145
    2100 0.001048 0.155
    2200 0.0006526 0.165
    2300 0.0004093 0.175
    2400 0.0002574 0.185
    2500 0.0001627 0.195
    2600 0.000103 0.205
    2700 6.538e-05 0.215
    2800 4.151e-05 0.23
    2900 2.634e-05 0.24
    3000 1.668e-05 0.255
    3100 1.06e-05 0.265
    3200 6.708e-06 0.28
    3300 4.235e-06 0.29
    3400 2.667e-06 0.305
    3500 1.684e-06 0.32
    3600 1.04473e-06 0.365
    3700 6.52e-07 0.375
    3800 4.03e-07 0.39
    3900 2.47657e-07 0.4

    -- MichelangeloMangano - 2017-11-02

    Topic attachments
    I Attachment History Action Size Date Who Comment
    PDFpdf hl-slash-lhc.pdf r1 manage 148.1 K 2018-05-10 - 17:51 XabierCidVidal  
    PNGpng xsec_ratio.png r1 manage 11.0 K 2018-10-14 - 03:05 SPaganGriso Ratio of NLO+NLL over NLO calculation for gluino production x-section
    Edit | Attach | Watch | Print version | History: r20 < r19 < r18 < r17 < r16 | Backlinks | Raw View | WYSIWYG | More topic actions
    Topic revision: r20 - 2018-10-16 - XabierCidVidal
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