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T: Fachverband Teilchenphysik

T 86: Searches/BSM V (Misc.)

T 86.6: Vortrag

Freitag, 4. April 2025, 10:15–10:30, ZHG010

Exploring new physics at LHC with Model Unspecific Search in CMS — Alexander Schmidt, Arnd Meyer, •Chinmay Seth, Felipe Torres Da Silva De Araujo, and Thomas Hebbeker — III. Physikalisches Institut A, RWTH Aachen

The Standard Model of Particle Physics, while highly successful, has limitations and fails to provide a comprehensive description of fundamental particles. Beyond Standard Model theories explore alternative explanations for these shortcomings.

The Large Hadron Collider provides access to unprecedented energy for proton-proton collision experiments, generating data to explore theories beyond the Standard Model. Model Unspecific Search in CMS (MUSiC) is one such effort where a model-independent approach is used to look for regions of possible discrepancies between observations from the CMS detector and standard model predictions.

MUSiC classifies events into ’event classes’ based on the multiplicity of specific reconstructed final state particles, such as a class with 2 muons and 1 jet. Kinematic distributions for these classes are generated using three key event variables. The algorithm calculates a p-value, considering systematic and statistical effects, and identifies regions in distributions that deviate from the statistical model. Applying further statistical corrections yields a final p-value, highlighting the most deviating event classes. If the p-value surpasses a set threshold, it signifies a potential window to new physics in that corresponding region. We discuss the concept of MUSiC, its scope, and challenges in this talk.

Keywords: Model Independent Search; Beyond Standard Model; MUSiC; CMS; New Physics