UERJ - CMS Group

Abstract

UERJ CMS group is composed of several subgroups studying different aspects of the rich CMS physics spectrum. We have subgroups working on Higgs physics, Forward Physics, Heavy Flavours and BSM. We also have many ongoing activities on hardware and software development, the main ones being the Precision Proton Spectrometer (PPS), the Resistive Plate Chamber (RPC) upgrade and the development of the forward muon L1 trigger based on neural network implemented on an FPGA.

measurement of Higgs production through vector-boson fusion (VBF) and its couplings to detect possible deviations associated with new physics. Another process we will be measuring is the vector boson scattering (VBS) that has a similar topology to the VBF. There is a delicate balance between the VBS process diagrams in order to ensure the unity of the Standard Model processes. The presence of new physics can alter the balance between VBS diagrams and lead to observable deviations. These analyzes will be developed using modern deep neural network techniques in order to optimize the significance of the observed signal. We are also developing with Fermilab an L1 level trigger for the CMS front muon system, based on deep neural networks implemented in FPGA.

The Precision Proton Spectrometer (PPS) system is composed of a set of detectors for measuring protons and flight time of protons from collisions in the CMS experiment. The PPS was built to measure Central Production processes Exclusive, including the production via fusion of W bosons pairs of photons and Z, pairs of photons and high mass leptons and high transverse momentum jets, as well as search for anomalous and new engagements resonances. PPS detector is already in operation and collected data at high luminance integrated with the CMS. During the LHC shutdown period from 2019, improvements will be made to the PPS system, its electronics and data acquisition system (DAQ) included. In this project, we propose to emulate the electronic PPS on a test bench. The bench will be used for the development and commissioning of the new DAQ system. The group participates in the analysis of the data collected with the PPS detector involving the measurement of gauge boson pair production via photon fusion, which provides information on the theory’s quartic quadratic couplings. When measuring protons from interaction with PPS, the sensitivity for measuring quartic couplings increases significantly, including the anomalous couplings described in effective theories (EFT) used in extensions to the Standard Model.