LDM Sub-group Status & Timeline For DUNE BSM Working Group - PowerPoint PPT Presentation

LDM Sub-group Status & Timeline For DUNE BSM Working Group Dec. 20, 2016 Jae Yu Most the slides from G. Brown & A. Chatterjee

Light DM Production at High Intensity Accelerator • Now the Higgs particle, a part of only 5% of the universe, may’ve been seen • It is time for us to follow the suite of others in the 95% of the universe!! Lower E P @ MiniBooNE Higher E P @ LBNE (F) • Detection of DM: • How does a DM event look in an experiment?: High Intensity Proton Beam Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 2 Arlington

Dark Matter Search Motivation LHC DUNE potential Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 3 Arlington

DM Subgroup Tasks • Integration and validation of the existing MC tools to DUNE simulation • Study on sensitivity limitation w/ default configuration • Define detector parameters and the impact to sensitivity – Angular coverage, efficiency, material depth, etc.. – ProtoDUNE measurements? • Necessary timing and energy resolutions vs DM mass and the effect to the neutrino background • Produce physics results using the simulation • Further tilted beam study Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 4 Arlington

The LDM Processing Chain DM Flux ND Simulations DM-n Cross-section (Interfacing with LArsoft) n Background Events Analysis Event Selection A. Chatterjee 5 Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 5 Arlington

Dark Matter Flux ● DM flux generated using MadGraph. ● DM flux calculated at the detector location using figucial cuts. ● DM four momenta are stored in four-vector format and saved in the output root file ● Interfacing the outpt root file with ND simulation in LArsoft. 6 Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 6 Arlington

DM-nucleon Cross-section ● GENIE does not have any cross-section model for DM with nucleon ● Standalone code for the cross-section ● DM-electron, DM-nucleon cross-section as a function of DM energy and angle will be stored in root file ● Interfacing the root output file with LArsoft. ● Coding in progress. 7 Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 7 Arlington

ND simulation ● Three alternative designs of ND available ● FGT, high pressure gAr TPC, LArTPC ● The full Geant4 simulation of FGT, dunefgt, available ● Need to we interface the flux & X-sec ● Uses ART framework for data handling. ● Other detector option can also be tested later 8 Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 8 Arlington

Detailed Overview of 1 st Step • Python automates MadGraph over a range of 4 free parameters – Dark mediator(V) mass – Dark matter particle( χ ) mass – Kinetic mixing ( κ ), – Coupling parameter ( α ) • MadGraph integrates the paths of many instances of the process given a 120GeV proton beam striking a target and the statistics are saved to disk. – Energy, Momentum, Tilt, Etc. • Python runs our analysis program powered by ROOT which simulates detector response and generates graphs.

Tasks and Status MadGraph Python generates The MadGraph simulates 120 Dark Matter a range of jobs are GeV proton events are parameters for distributed among MadGraph to use a supercomputing collisions on saved to disk. in its simulation. cluster. target. Event data is Our executable Detector response analyzed and reads the event is simulated and graphs are data. analyzed. generated. G. Brown

Neutrino background ● Main background for LDM search is the neutrino ● We are using G4LBNE framework to calculate neutrino events at the ND location ● We have also calculated neutrino flux at different off-axis angle A. Chatterjee 11 Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 11 Arlington

DM and Neutrino energy spectrum for different off axis angle DM Spectrum Neutrino Spectrum A. Chatterjee 12 Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 12 Arlington

Status and Timeline ● Present: DM flux generation ready for interfacing to the next step ● Feb. 2017 ● Standalone code for cross-section analysis ready ● Neutrino background analysis ready ● Apr. 2017: Complete interfacing all with FGT ● June 2017: Complete the interface all and cross- check ● July 2017: Start producing more realistic sensitivity plots 13 Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 13 Arlington

DM Subgroup Time Lines • End of 2016: Produce initial estimate of signal vs background in the normal beam configurations – Produce initial list of detector capabilities for normal running modes – e kick out and nucleon recoil identification capabilities – Background estimate depending on the ID capabilities • Jan. 1, 2017: Complete integration of the existing MC tool to DUNE simulation package • July 1, 2017: Start producing more realistic physics potential and sensitivity plots – Refine detector requirements, if anything need to change • Jan. 1, 2018: Finalize the sensitivity plots vs LDM mass – Refine sensitivity plots as needed through July 1, 2018 • July 1, 2018: Start the draft writing for TDR section Dec. 20, 2016 LDM Status & Timeline, J. Yu, U. Texas at 14 Arlington