Postdoctoral Researcher CMS Experiment

Big Science Sweden; Hamburg; Hybrid; EUR 65.000 - 90.000; Vollzeit

Zusammenfassung

DESY in Hamburg invites applications for a Helmholtz Investigator Group member to work within the CMS Collaboration on top quark interactions with W, Z, and Higgs bosons at the LHC.

Responsibilities include developing jet reconstruction and ML methods, leading differential cross-section unfolding and EFT constraints, supervising PhD students, contributing to CMS tasks, and representing the group at conferences with possible short-term stays at CERN.

Qualifikationen

• Experience with jet reconstruction and machine-learning techniques is desirable.
• Familiarity with differential cross-section measurements and EFT interpretations is beneficial.

Aufgaben

• Develop and apply advanced jet reconstruction and ML techniques for identifying boosted top quarks and heavy bosons.
• Lead the unfolding of differential cross-section measurements and EFT interpretation to constrain top-boson couplings.
• Co-supervise PhD students and help shape measurement methods and analysis strategies across projects.
• Contribute to CMS service and object-performance tasks.
• Represent the group within CMS and at international conferences; potential short-term stays at CERN.

Jobbeschreibung

The CMS DESY group is based in Hamburg and is one of the largest groups worldwide participating in the CMS Experiment at CERN. The successful candidate will join a newly established Helmholtz Investigator Group at DESY, working within the CMS Collaboration to study how top quarks interact with the heavy bosons (W, Z, and Higgs) at the highest energies reached at the LHC. Using the full CMS dataset, the project targets these interactions in the boosted regime and interprets the measurements in the framework of Effective Field Theory, searching for subtle deviations from the Standard Model that could point to new physics. The work combines advanced jet reconstruction and identification with modern machine-learning techniques, offering the opportunity to develop expertise at the interface of experimental data analysis and cutting-edge ML methods.

About your role:

• Develop and apply advanced jet reconstruction and machine-learning techniques for the identification of boosted top quarks and heavy bosons, forming the methodological foundation shared across the group's measurements.
• Take a leading role in the unfolding of the differential cross-section measurements and in the global Effective Field Theory interpretation combining them into constraints on top-boson couplings.
• Co-supervise the group's PhD students and help shape the strategic direction of the measurement methods and analysis setup, ensuring continuity and knowledge transfer across the staggered projects.
• Contribute to CMS service and object-performance tasks.
• Represent the group within the CMS Collaboration and at international conferences, with the possibility of regular short-term research stays at CERN.