2023:topics
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2023:topics [2023/02/21 17:03] mathieu.pellen |
2023:topics [2023/06/22 16:06] (current) gregor.kasieczka [Session 2] |
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| ===== List of topics for 2023 ====== | ===== List of topics for 2023 ====== | ||
| //(accessible to everyone, editing rights to conveners and organizers)// | //(accessible to everyone, editing rights to conveners and organizers)// | ||
| + | --------------------------- | ||
| ==== Session 1 ==== | ==== Session 1 ==== | ||
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| - | * Higgs/EW sector: | + | * Higgs: |
| - | * understanding the SM for high Higgs pT; role of top mass corrections/scheme (MSbar vs on-shell); how to improve channel sensitivities; VBF signal at high pT; gluon-fusion background in VBF phase-space | + | * understanding the SM for high Higgs pT; role of top mass corrections/scheme (MSbar vs on-shell); how to improve channel sensitivities; |
| - | * Parton-shower uncertainties in VBF | + | * VBF signal at high pT; gluon-fusion background in VBF phase-space |
| - | * polarisation measurements (for diboson/VBS as well): theory/experiment interplay | + | * parton-shower uncertainties in VBF |
| - | * prospects for tri-boson production. Are there any theoretical limitations? | + | |
| + | * EW sector: | ||
| + | * polarisation measurements (for diboson/VBS as well): theory/experiment interplay | ||
| + | * prospects for tri-boson production. Are there any theoretical limitations for run III? | ||
| + | * W mass: | ||
| + | * (non-perturbative) modeling | ||
| + | * new ideas/methods (asymmetry) | ||
| + | * determination at e+e- | ||
| + | * theory agnostic determination; how agnostic? | ||
| + | * STXS for multiboson processes | ||
| * Top: | * Top: | ||
| - | * MSbar vs on-shell | + | * ttW tension; multi-jet merging and other modelling aspects (including treatment in experiments) |
| - | * ttW; tension; can new calculations resolve it? | + | * merging of off-shell ttW with parton shower |
| + | * modelling of ttbb | ||
| + | * tt+X: on-shell vs. off-shell. role of single-top contributions | ||
| + | * tt+gamma: modeling, in particular regarding on-shell/off-shell | ||
| + | * Additional jet activity in top-quark pair production and decay | ||
| Line 47: | Line 60: | ||
| * Miscellaneous | * Miscellaneous | ||
| * forward physics -> FASER. Anything needed from SM point of view? | * forward physics -> FASER. Anything needed from SM point of view? | ||
| - | * MW: (non-perturbative) modeling; new ideas/methods | + | |
| + | * Machine Learning | ||
| + | * Matrix Element calculation using ML | ||
| + | * Interpretable models | ||
| + | * Fast surrogate models for physics simulations | ||
| + | * Workflows and interoperability with experimental software | ||
| + | * Incorporating uncertainties in the training of ML models | ||
| + | * ML-based unfolding techniques | ||
| + | * Enforcing properties to ML models: Lorentz invariance/equivariance, permutation invariance, IRC safety | ||
| Line 56: | Line 77: | ||
| * take stock of how well most recent generator developments have improved description of multiple new measurements of substructure. (Followup from a previous Les Houches 2015 on q/g-tagging) | * take stock of how well most recent generator developments have improved description of multiple new measurements of substructure. (Followup from a previous Les Houches 2015 on q/g-tagging) | ||
| - | ==== Session 2 ==== | ||
| - | .... | + | **__Tools, Event Generators and Machine Learning:__** |
| - | ---- | + | **__Standard Model Higgs:__** |
| - | ---- | + | * ggF |
| + | * N3LO PDFs: Seems that aN3LO PDFs have a large impact, beyond the previously assigned PDF-TH uncert. Do other groups agree with this and how robust are these conclusions? Do cuts affect the conclusion and are the changes localised in PS? What other reasonable approximations could we make for comparison? (Related lit: 2207.04739) | ||
| + | * ggF+jj as a background for VBF | ||
| + | * EW Corrections: Various approximations seem to agree well with each other and the full result. Impact on STXS bins? (Related lit: 2010.09451) | ||
| - | ==== Session 1 (from 2021) ==== | ||
| - | Here for convenience | ||
| - | **__Jet substructure techniques:__** | + | * B-quark issues |
| + | * Backgrounds for Higgs processes (ttbb/ttH, V+HF/VH) | ||
| + | * 4FS/5FS (bbH, t/H/Z+j, ttbb, fused Monte Carlos) (e.g. 2006.10086, 2109.15039, 2207.11264) | ||
| - | * Interplay of jet substructure with other groups (e.g. jet substructure for EW measurements like VBF, semileptonic VV, etc.) | ||
| - | * Snowmass jet substructure report (JSS at future colliders) [work + discussion] | ||
| - | * What can we do with previous colliders, in light of the LHC [discussion] | ||
| - | * Comparing new unfolding methods | ||
| - | * Accord on unbinned results (?) | ||
| - | * Probing the latest MC generators (PB algorithm, PANScales, Deductor...) with jet substructure | ||
| - | * Finite N_C, beyond LL, ... | ||
| + | * Flavour algorithms (Overlap with Techniques and calculations for SM phenomenology group) | ||
| + | * Potential for LH study regarding the various recent flavour jet algorithms comparison/review/benchmarking (Related lit: 2208.11138, 2205.01109, 2205.01117, 2205.11879, 2104.06920, 2202.05082) | ||
| + | * Using new flavour jet algorithms in EXP vs new TH developments | ||
| + | * Jet Lund planes, hadronisation models | ||
| + | * Start with e+e- ->bb+j? Sensible to think about the impact on Higgs sector yet (H->bb+j)? | ||
| + | * Off-shell measurements | ||
| + | * Challenges of multi-leg processes, e.g. ggVVjj very challenging matrix element, can/should we approximate it with matching/merging? Are new techniques helpful (e.g. OTTER)? | ||
| + | * Interpreting off-shell measurements in terms of EFTs, how does this impact interpretation of width measurements? (Related lit: 2203.02418) | ||
| - | **__Monte Carlo:__** | + | * Jets |
| + | * VH, VH+j, VBF @ NNLO with decay H->bb (ideally @ NNLO), identifying/tagging jets | ||
| + | * q/g jet tagging | ||
| - | * Non-perturbative uncertainties | + | * HH |
| - | * common hadronisation interface and variations | + | * EFTs (SMEFT/HEFT) |
| - | * theoretical understanding | + | * Constraining the Higgs self-coupling using H + HH, are other processes or HH channels beyond ggHH useful? |
| - | * differences in tuned comparisons | + | * Currently using STXS for H input for self-coupling, it was not optimised for this, is there something better we can do here (e.g. fiducial differential measurements optimised for kappa_lam)? |
| - | * pheno impact for certain classes of processes (e.g. VBF/VBS) | + | |
| - | * Shower accuracy studies | + | |
| - | * comparing different schemes on higher orders, evaluate phenomenological impact | + | |
| - | * Subleading colour and interplay with colour reconnection | + | |
| - | * New sampling methods and algorithms versus machine learning techniques | + | |
| - | * Accuracy of merging resummed calculation versus ME+PS paradigms | + | |
| - | * Photon physics, modelling of fragmentation | + | |
| - | * Heavy flavour matching | + | |
| - | * review of existing measurements | + | |
| - | * Connecting precision calculation, fragmentation and decays | + | |
| - | * partons at 100 TeV | + | |
| - | * Common LHC event bazaar | + | |
| - | * Status and needs for electroweak corrections and radiation in shower algorithms | + | |
| - | * Machine learning and adaptive Monte Carlo methods | + | |
| + | * Yukawa couplings | ||
| + | * top: ttH/tttt | ||
| + | * charm: VHcc (a la VHbb), indirect measurements via ptH | ||
| - | **__SM Higgs Topics:__** | + | * Experiment/Theory efficient information exchange |
| + | * Likelihoods, discriminators, fiducial cross sections, differential distributions | ||
| + | * negative events and strategies to mitigate them | ||
| + | * public codes, weighted vs unweighted events, making the best use of the latest fixed-order results | ||
| + | * making use of new results appearing whilst analysis is ongoing and can TH help here? Can unbinned reweighting with machine learning be useful? | ||
| - | * ggF | + | * Parton-shower Issues and Developments |
| - | * N3LO PDFs, small-x | + | * The limiting systematic on VBF (and very significant for other Higgs processes), what can we do with this? What can new showers say on this right now? |
| - | * EW corrections | + | * New showers, subleading-color issues with parton showers, formal accuracy, and possible effects on Higgs physics (PanScales 2205.02237, 2207.09467; Forshaw, Plätzer et al 2003.06400, 2007.09648, 2011.15087, 2012.15215; Dire, VINCIA, ...) |
| - | * cuts/differential distributions | + | |
| - | * B-quark issues | + | |
| - | * Ttbb, V+HF, VH | + | |
| - | * 4FNS vs 5FNS: bbH, t/H/Z+j QCD EW… | + | |
| - | * Flavour jet algo\ | + | |
| - | * ggVV | + | |
| - | * Massive results [if we’ll have them, probably yes] | + | |
| - | * VBF | + | |
| - | * Factor vs non-factor: TH vs EXP discussion on cuts etc (especially Run3) | + | |
| - | * Jet-ology | + | |
| - | * NNLO+NLO res, VH+J, NNLO+decay & fiducial studies | + | |
| - | * HH | + | |
| - | * EFTs, H vs HH | + | |
| - | * In general, EFT fits etc | + | |
| - | * Exp vs theory efficient information exchange | + | |
| - | * Likelihood, discriminators as black box | + | |
| - | * Differential distribution. TH insight for measurements… | + | |
| - | * PS issues (SLC, higher logs…, liaise with QCD) | + | |
| - | * New opportunity for Run3 (unexplored regions, != cuts etc) | + | |
| - | * STXS | + | |
| - | * for decays - binned proposal | + | |
| - | * FO/Boosted | + | |
| - | * NLO-Improved NNLO HTL predictions for gg → H(→yy)+Jet in the fiducial region, experimental sensitivity to different decay channels as a function of pt | + | |
| - | * Mixed QCD-EW contributions to higgs (e.g. 2010.09451, 2007.09813) | + | |
| - | * Backgrounds | + | |
| - | * Predictions+uncertainty models for backgrounds to ttH production: tt+HF, ggH+HF, tt+V, previous proposal was to estimate ttV EW correction in different phase space regions | + | |
| - | * 4FS/5FS | + | |
| - | * bbar -> higgs (e.g. 2004.04752) | + | |
| - | * tHj tZj QCD+EW (e.g. 2006.10086), various 4FS/5FS matching issues to consider | + | |
| - | * Showers | + | |
| - | * New showers, subleading-colour issues with parton showers and possible effects on Higgs physics (PanSccales 2011.10054; Forshaw, Plätzer et al 2003.06400, 2007.09648, 2011.15087, 2012.15215) | + | |
| + | * New opportunities for Run3 (unexplored regions, != cuts etc) | ||
| + | * Identifying processes that should be reexamined at higher precision, or which were too rare before | ||
| + | * Boosted regions and how Run3 can change this picture (increased statistics, improvements in boosted tagging) | ||
| + | * STXS | ||
| + | * v1.2 too aggressive binning (required merging bins upon analysis) | ||
| + | * v1.3 binning less aggressive could be worth adding bins to highlight specific observables (e.g. CP-sensitive binning) | ||
| + | * Integrating decays in STXS | ||
| + | * Thinking about the HL-LHC and its sensitivity in combination with e+e- Higgs factory. | ||
| + | |||
| + | * Backgrounds | ||
| + | * Predictions+uncertainty models for backgrounds to ttH production: tt+HF, ggH+HF, tt+V, previous proposal was to estimate ttV EW correction in different phase space regions | ||
| + | * Identifying backgrounds needed for other Higgs channels/measurements and what we can do to address them (see e.g. H background to HH, H+2j, ggVVjj, ttbb topics) | ||
| + | |||
| + | * Precision | ||
| + | * Requirements and goals for measuring Higgs processes and properties @ HL-LHC / 14 TeV, 100 TeV, and e+e- Higgs Factories | ||
| ==== Session 2 ==== | ==== Session 2 ==== | ||
| + | |||
| + | **__Higgs:__** | ||
| + | |||
| + | * "Precision": | ||
| + | * Trilinear and quadrilinear Higgs couplings | ||
| + | * Lepton flavour violation in the Higgs sector | ||
| + | * Constraining the CP structure of the Higgs couplings | ||
| + | * Higgs and EFT | ||
| + | * Characterizing Higgs boson production and decay | ||
| + | * "Novelties": | ||
| + | * Exotic decays of the 125 GeV Higgs boson | ||
| + | * Additional Higgs bosons (low/high mass) - uncovered parameter space | ||
| + | * Naturalness | ||
| + | * Gaps in searches for traditional models (SUSY, compositness) | ||
| + | * Searches for cosmological triggers (new Higgs bosons and v-like leptons) | ||
| + | * Unexpected signatures of naturalness | ||
| + | |||
| + | |||
| + | **__Machine Learning and Tools:__** | ||
| + | * **Reinterpretation**: Tools like Rivet, Gambit, .., ML for reinterpretation, reinterpretation of model agnostic searches | ||
| + | * **EFTs**: Fits, PDF inclusion, SMEFT progress ... | ||
| + | * **Physics & ML**: Injection of physics priors into classification and generative models; interpretable ML techniques; ML for optimal sensitivity for BSM searches and optimal observables and likelihood learning, opening the black box | ||
| + | * **Anomalies**: A unified view of different anomaly detection techniques,.pushing the boundaries of anomaly detection | ||
| + | |||
| + | |||
| + | |||
| + | **__Low-energy precision probes of BSM:__** | ||
| + | * New Electric Dipole Moment searches? | ||
| + | * Parity violation in new systems? | ||
| + | * Exotic atoms/ions to test exotic forces | ||
| + | * muonic atoms | ||
| + | * antiprotonic atoms | ||
| + | * highly charged ions | ||
| + | * Rydberg states | ||
2023/topics.1676995389.txt.gz · Last modified: 2023/02/21 17:03 by mathieu.pellen
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