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Exploitation and Upgrades of the CMS experiment at the LHC: the next phase

English title Exploitation and Upgrades of the CMS experiment at the LHC: the next phase
Applicant Dissertori Günther
Number 197084
Funding scheme Project funding
Research institution Institut für Teilchen- und Astrophysik ETH Zürich
Institution of higher education ETH Zurich - ETHZ
Main discipline Particle Physics
Start/End 01.11.2020 - 31.10.2023
Approved amount 1'352'619.00
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Keywords (6)

New Physics Searches; CMS Experiment; LHC; Higgs Boson; Upgrades; Electromagnetic Calorimeter

Lay Summary (German)

Mit diesem Forschungsprojekt wird die führende Rolle der ETH Zürich im CMS Experiment am Large Hadron Collider (LHC) des CERN konsolidiert, dank wichtigster Beiträge sowohl zu Datenanalysen mit Schwerpunkt auf den Studien des Higgs Bosons und der Suche nach neuer Physik, als auch zu den Upgrade-Arbeiten des elektromagnetischen Kalorimeters.
Lay summary
Seit mehreren Jahrzehnten nimmt die ETH Zürich eine führende Rolle im CMS Experiment am Large Hadron Collider (LHC) des CERN ein. Neben entscheidenden Beiträgen zur Konstruktion und zum Betrieb des Detektors konnten die ETH Forschenden bereits sehr zahlreiche und entscheidende Beiträge zu den Datenanalysen liefern. Mit diesem neuen Forschungsprojekt kann diese Rolle weitergeführt werden. Der Schwerpunkt der geplanten Analyse-Arbeiten liegt auf Präzisionsstudien der Eigenschaften des Higgs Bosons, sowie auf der Suche nach neuen Teilchen und dem Studium von speziellen Messgrössen, welche in den letzten Jahren Abweichungen von den theoretischen Vorhersagen gezeigt haben und deshalb erste Hinweise auf neue Physik sein könnten. Weiters wird sich die Forschungsgruppe intensivst am Betrieb des Detektors sowie dessen Upgrade Arbeiten beteiligen.

Direct link to Lay Summary Last update: 02.11.2020

Responsible applicant and co-applicants


Project partner

Associated projects

Number Title Start Funding scheme
173598 FLARE: Maintenance & Operation for the LHC Experiments 2017-2020 01.04.2017 FLARE
186172 FLARE - Computing Infrastructure for LHC Experiments 01.04.2019 FLARE
186238 FLARE 2019-2021: Operation, Computing and Upgrades of the CMS Experiment 01.04.2019 FLARE
189969 PETITION - PET for InTensive Care units and Innovative protON therapy 01.09.2020 Sinergia
200642 Measurement of Higgs Boson Properties with CMS and Search for Lepton Flavor Violation with Mu3e 01.04.2021 Project funding
175625 Exploitation and Upgrades of the CMS experiment at the LHC 01.10.2017 Project funding


This funding proposal (excellence grant) seeks support by the SNSF to continue the successfully ongoing SNSF-funded research program of the PI, carried out in the context of the CMS experiment at the Large Hadron Collider (LHC) at CERN, Geneva. The current grant (finishing in September 2020) is a streamlined physics analysis program with clear emphasis on precision studies of the Higgs boson (differential measurements of Higgs production using its di-photon decay channel and limits on the Higgs self-interaction via the search for di-Higgs production) and on searches for physics beyond the Standard Model (SM) (supersymmetric particles and Heavy Neutral Leptons (HNLs)). This is complemented by novel approaches to event reconstruction based on modern machine learning tools and by contributions to the Phase-2 upgrades of the ECAL barrel electronics and Precision Timing Layer (barrel part).In view of the upcoming LHC run schedule and the corresponding modest increase of statistics to be expected during the period of this new proposal, the strategy will be adapted, since it is not very meaningful to continue analyses that consequently would not result in significantly new physics insights (such as the di-Higgs search, the search for supersymmetry with the MT2 observable or the search for HNLs using W boson decays). Therefore, the main goals of this new proposal are: (a) Continue the Higgs program (focus on the di-photon decay channel of the Higgs boson) in areas where further improvements in the systematic uncertainties and novel interpretations of the data can lead (i) to new results and/or (ii) to preparing the path towards future high-statistics analyses at the end of Run-3 and during the High-Luminosity phase of the LHC. These efforts will continue along the lines of employing novel machine learning methods and other event reconstruction improvements, as well as novel theoretical interpretations of the available data. (b) In terms of searches for new physics, the idea is to scrutinize previously untouched datasets (in particular the so-called CMS B-parking data set for a novel search for HNLs) and to measure not yet explored observables such as R(J/?), in order to address the important topic of possible signs of violations of lepton flavour universality. (c) Again, these activities will be complemented by contributions to the operations and Phase-2 upgrades of CMS, with emphasis on the ECAL barrel electronics and barrel Precision Timing Layer. As previously, the planned research efforts are in excellent synergy, complementarity and close coordination with the other CMS efforts at ETH (groups of R. Wallny and C. Grab), whose focus is on the optimal Physics exploitation of the CMS Pixel detector and on its upgrades. Finally, this excellence grant will allow the PI and his group to maintain and strengthen its standing in the competitive environment of the CMS experiment, and complement other investments related to detector operations and upgrade efforts.