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Séminaires
Extending the CMS physics program with the Precision Proton Spectrometer
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Europe/Paris
Description
The Precision Proton Spectrometer (PPS) is a near-beam magnetic spectrometer installed on both sides of the Compact Muon Solenoid (CMS) experiment at the CERN Large Hadron Collider (LHC). It employs tracking and timing detectors at a 200 m distance from the CMS interaction point to measure scattered protons that survive the collision, remaining intact.
PPS has successfully collected more than 110 fb−1 of data during the LHC Run 2 in the years 2016-2018. This represents a unique handle to extend the CMS physics program, allowing us to probe rare central exclusive production processes and to extend Beyond Standard Model physics searches.
The seminar will present an overview of the PPS apparatus employed in Run 2. The development of techniques to reconstruct the proton kinematic properties, modelling their propagation from the interaction point to the detector location through the LHC magnetic field, will be described, together with their validation with physics data. Finally, the most recent analyses performed using proton tagging will be presented, covering multiple exclusive processes such as lepton pair production, light-by-light scattering, vector boson pair production and top quark pair production.
