2021 Meeting of the Division of Particles and Fields of the American Physical Society (DPF21) Monday, 12 July 2021 - Wednesday, 14 July 2021 Zoom Book of Abstracts ii Contents Progress on construction and qualification tests of the Mu2e electromagnetic calorimeter mechanical structures .................................... 1 THE ITALIAN SUMMER STUDENTS PROGRAM AT THE FERMI NATIONAL ACCELER- ATOR LABORATORY .................................... 1 The Light Dark Matter eXperiment, LDMX .......................... 2 The Higgs and Leptophobic Force at the LHC ........................ 3 Ultra-High-Energy Tau Neutrino Cross Sections with GRAND and POEMMA . 3 CP-Violating Neutrino Non-Standard Interactions in Long-Baseline-Accelerator Data . 3 Color-octet scalars in Dirac gaugino models with broken R symmetry ........... 4 Picosecond Timing Layers for Future Calorimeters: Updates from the Askaryan Calorime- ter Experiment (ACE) .................................... 4 Confronting muon g-2 in SUSY GUTs with LHC-Run3 and Dark Matter Experiments . 5 Nanosecond machine learning with BDT for high energy physics ............. 5 Experimental signatures of a new dark matter WIMP .................... 6 Higgs to charm quarks in vector boson fusion plus a photon ................ 6 Quark and Gluon Contents of a Lepton at High Energies .................. 7 Viable Full Unification of the Standard Model into E8 .................... 7 Strong constraints on thermal relic dark matter from Fermi-LAT observations of the Galac- tic Center .......................................... 7 A Supersymmetric Flavor Clockwork ............................. 8 Extending QED to Interactions of the Full Eight-Component Vacuum Wavefunction of the Geometric Representation of Clifford Algebra ...................... 8 Searching for Cosmic Strings using data from the third Advanced LIGO-Virgo observing run .............................................. 9 New signatures of decaying HNLs in large scale detectors ................. 9 Welcome ............................................. 10 iii THz Photon Source Testing for the BREAD Experiment ................... 10 The REDTOP experiment: An eta/eta’ factory to explore Physics Beyond the Standard Model ............................................ 11 New bounds on sneutrino masses through collider searches . 11 Slow control and data acquisition software interfaces in the Mu2e experiment . 12 DUNE The Deep Underground Neutrino Experiment .................... 12 ProtoDUNE Physics and Results ................................ 13 The DUNE Near Detector .................................... 13 NLO Merging using HJets ................................... 14 Performance portability of random number generation in SYCL . 14 Progress toward building a pair of scintillating bubble chambers for WIMPs and reactor CEvNS ............................................ 15 Performance of Enhanced Wavelength-shifting Fibers for the Mu2e Cosmic Ray Veto De- tector ............................................. 15 Fabrication of a high efficiency cosmic ray veto detector for the Mu2e experiment. 16 NNLO single-top-quark production and decay: Discrepancies resolved, PDFs challenged 16 A Novel Approach to Unsupervised Learning for Anomalous Jet Identification with a Vari- ational Recurrent Neural Network ............................. 17 Testing freeze-in with Z bosons ................................ 17 QED radiative corrections to charged-current neutrino-nucleon elastic scattering for accel- erator neutrino experiments ................................ 18 Searchp for Vector-Like-Quarks T/B in Same-Sign Dilepton and Multi-lepton Final States at s = 13 TeV ........................................ 18 Search for top squarks in final states with two top quarks and several light-flavor jetsin proton-proton collisions at √s = 13 TeV .......................... 19 Search for vector boson scattering production of VW pairs in the semi-leptonic channel at CMS ............................................. 19 Additional Baryons and Mesons ................................ 20 Search for new particles in events with energetic jets and large missing transverse momen- tum in proton-proton collisions at sqrt(s) = 13 TeV ................... 20 Explicit Soft Supersymmetry Breaking in the Heterotic M-Theory B−L MSSM . 21 The R-parity Violating Decays of Charginos and Neutralinos in the B-LMSSM . 21 Cosmological Simulations of Axion String Radiation .................... 22 First Results of the AlCap Experiment ............................. 22 iv Diamond detector for dark matter direct detection ...................... 23 Jet Energy Scale and Resolution Measurements at CMS ................... 23 New beam test results of 3D detectors constructed with poly-crystalline CVD diamond . 24 Latest Results on the Radiation Tolerance of Diamond Detectors . 24 QED Model of Massless Neutrino Oscillation in the Geometric Representation of Clifford Algebra ............................................ 25 RADiCAL - Innovative Ultracompact Radiation-hard, Fast-timing EM Calorimetry . 25 Unfolding ATLAS Collider Data with the Novel OmniFold Procedure . 27 On a rigorous Framework for a Quantum N-Body Theory on curved Spacetime . 27 Searches for long-lived particles with the CMS experiment . 28 Recent Progress in ML for Tracker DQM ........................... 28 Model Validation and Extraction of the Inclusive Muon Neutrino Charged Current Cross Section at MicroBooNE ................................... 28 Application of Quantum Machine Learning using the Quantum Kernel Algorithm onHigh Energy Physics Analysis at the LHC ........................... 29 Track-Based Triggers for Long-Lived Particles at Future Colliders . 29 Measurements of the top quark pair production in 5.02 TeV pp and PbPb collisions . 30 Toponium Phenomenology at the LHC ............................ 30 Development of a System for Beam Abort and Luminosity Determination at the HL-LHC based on polycrystalline CVD diamond .......................... 31 Higgs Physics at FCC-ee .................................... 32 Search for Light Pseudoscalar Boson in the Composite Higgs Model using the CMS Detector ................................................ 32 Machine Learning for Background Hit Rejection in the Mu2e Straw Tracker . 32 Dark Energy Spectroscopic Instrument: Science Overview . 33 ECAL trigger primitives performance in Run 2 and improvements for Run 3 . 33 Variable Importance Ranking in the CMS Search for pp to ttt in the Single Lepton Final State at a Center-of-Mass Energy of 13 TeV ........................ 34 The Earth as a transducer for dark-photon dark-matter detection . 34 TeV-scale Lepton Number Violation: 0νββ−decay, the origin of matter and energy frontier probes ............................................ 35 Photons after muon capture on aluminum and titanium ................... 35 Warming Up Cold Inflation ................................... 36 v Unfolding at the LHC: A review of unfolding at the LHC, including recent and future de- velopments with RooUnfold. ................................ 36 Collider and GW complementarity in the 2HDM ....................... 37 Magnetic charge and Massive Photon ............................. 37 Self-interacting Dark Matter with Scalar Dilepton Mediator . 38 Flavor changing top decays to charm and Higgs with ττ at the LHC . 38 A tri-muon trigger for pair-production of dark photons with the CMS Experiment at the HL-LHC ........................................... 39 Possible Structural Linkage between Neutrinos and Charged Leptons in Neutrinos’ Own Maximum Contact ..................................... 40 Space-Time Conjunction .................................... 40 p Measurement of the properties of Higgs boson production at s = 13 TeV in the diphoton decay channel using 139 fb−1 of pp collision data with the ATLAS experiment . 41 −1 Searchp for resonant pair production of Higgs bosons in the bbbb final state using 139 fb of s = 13 TeV pp collision data with the ATLAS detector . 41 Improvements to ATLAS Inner Detector Track reconstruction for LHC Run-3 . 42 Framework for Hyperparameter Optimization in Machine Learning using the ATLAS Grid Computing Resource .................................... 42 Drell-Yan angular lepton distributions at small x from TMD factorization . 43 Reconstructing silicon pixel hits using neural networks ................... 43 Search for the Higgs boson decaying to a pair of muons in pp collisions at 13 TeV with the ATLAS detector ....................................... 44 Electroweak Restoration at the LHC and Beyond ....................... 44 The calculation of inelastic neutrino-nucleus scattering ................... 45 An intelligent Data Delivery Service (iDDS) for and beyond the ATLAS experiment . 45 Dark Energy Spectroscopic Instrument: Instrumentation Overview . 46 Exploring color-octet scalar parameter space in minimal R-symmetric models . 46 SM Extension with Anomaly Free Flavor U(1) ........................ 47 Calibration of the light flavour mistag rate forp ATLAS b-jet identification algorithms using the negative tag method in pp collisions at s = 13 TeV . 47 Search for non-resonant di-Higgs production in the HH->bbyy decay channel in pp colli- sions at sqrt(s) = 13 TeV with the ATLAS detector .................... 48 Missing transverse momentum algorithm improvements for the ATLAS High Level Trigger for Run 3 for pp collisions ................................. 48 vi Electroweak Symmetry Non-restoration in UV-complete Models with New Fermions . 49