Angular distribution study for high mass dimuon pairs in CMS open 2012 data and for Mono-Z$^{\prime}$ model

TL;DR

This paper analyzes the angular distribution of high-mass dimuon pairs in CMS open data at 8 TeV to test for deviations from the Standard Model, using the cosθ_CS variable, and finds no evidence of new physics such as the Mono-Z' model.

Contribution

It applies angular distribution analysis to CMS open data to search for signs of physics beyond the Standard Model, specifically testing the Mono-Z' model.

Findings

No deviation from the Standard Model observed.

Angular distribution consistent with Drell-Yan process.

Mono-Z' model not supported by the data.

Abstract

This analysis uses the CMS open data to study the angular distribution of high-mass dimuon pairs produced during proton-proton interaction at a center of mass energy of 8 TeV. The study uses the cos$\theta_{\text{CS}}$ variable defined in the Collins Soper frame. In the Standard Model, the production of high-mass dimuon pairs is dominated by the Drell-Yan process, which exhibits a strong forward-backward asymmetry. However, many scenarios beyond the Standard Model predict different shapes for the cos$\theta_{CS}$ distribution. In excess events beyond the Standard Model, the angular distribution can be used to distinguish between those models. The Mono-Z$^{\prime}$ model has been used to interpret the data, and no deviation from the SM has been observed.