Final Technical Report for ``Paths to Discovery at the LHC : Dark Matter and Track Triggering"

Technical Report · Mon Oct 24 00:00:00 EDT 2016

DOI:https://doi.org/10.2172/1329639· OSTI ID:1329639

Hahn, Kristian ^[1]

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1. Northwestern Univ., Evanston, IL (United States)

Particle Dark Matter (DM) is perhaps the most compelling and experimentally well-motivated new physics scenario anticipated at the Large Hadron Collider (LHC). The DE-SC0014073 award allowed the PI to define and pursue a path to the discovery of Dark Matter in Run-2 of the LHC with the Compact Muon Solenoid (CMS) experiment. CMS can probe regions of Dark Matter phase-space that direct and indirect detection experiments are unable to constrain. The PI’s team initiated the exploration of these regions, searching specifically for the associated production of Dark Matter with top quarks. The effort focuses on the high-yield, hadronic decays of W bosons produced in top decay, which provides the highest sensitivity to DM produced via through low-mass spin-0 mediators. The group developed identification algorithms that achieve high efficiency and purity in the selection of hadronic top decays, and analysis techniques that provide powerful signal discrimination in Run-2. The ultimate reach of new physics searches with CMS will be established at the high-luminosity LHC (HL-LHC). To fully realize the sensitivity the HL-LHC promises, CMS must minimize the impact of soft, inelastic (“pileup”) interactions on the real-time “trigger” system the experiment uses for data refinement. Charged particle trajectory information (“tracking”) will be essential for pileup mitigation at the HL-LHC. The award allowed the PI’s team to develop firmware-based data delivery and track fitting algorithms for an unprecedented, real-time tracking trigger to sustain the experiment’s sensitivity to new physics in the next decade.

• Research Organization: Northwestern Univ., Evanston, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC), High Energy Physics (HEP)
• DOE Contract Number: SC0014073
• OSTI ID: 1329639
• Report Number(s): DOE-NU-0014073-0; TRN: US1700390
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
CERN LHC
HADRONIC PARTICLE DECAY
W MINUS BOSONS
W PLUS BOSONS
NONLUMINOUS MATTER
T QUARKS
ALGORITHMS
CMS DETECTOR
PARTICLE TRACKS
SENSITIVITY
CHARGED PARTICLES
DETECTION
PULSE PILEUP
MITIGATION
SIGNALS
TRAJECTORIES
TRIGGER CIRCUITS
PARTICLE DISCRIMINATION