Project

Back to overview

Measurement of Higgs Boson Properties and Upgrade of the CMS Pixel Detector for Phase-2

English title Measurement of Higgs Boson Properties and Upgrade of the CMS Pixel Detector for Phase-2
Applicant Wallny Rainer
Number 178826
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 01.04.2018 - 31.03.2021
Approved amount 1'259'929.00
Show all

Keywords (5)

Supersymmetry; Pixel Detector Technology; Large Hadron Collider; Higgs Boson; Hadron Collider Physics

Lay Summary (German)

Lead
Einige der wichtigsten wissenschaftlichen Fragen, denen das CMS Experiment am LHC des CERN nachgeht, ist die genauere experimentelle Charakterisierung des im Jahre 2012 gefundenden Higgsbosons sowie die Suche nach Physik jenseits des Standardmodells. Dieses Gesuch widmet sich diesen Fragen in drei Datenanalyse-Ansätzen. Weiterhin unterstützt dieses Gesuch Studien für eine neue Version des Pixeldetektors, der im Jahre 2025 eingebaut werden wird für die Datennahme der Phase 2 des Large Hadron Colliders (LHC).
Lay summary
Im Jahre 2012 haben die beiden grossen Experimente des Large Hadron Colliders (LHC) am europäischen Teilchenphysikforschungszentrums CERN das Higgsboson entdeckt. Eine wichtige Komponente dieses Gesuchs ist die genaue Bestimmung seiner Eigenschaften mittels des Compact Muon Solenoid (CMS) Experiments. Abweichungen von Eigenschaften des gefundenen Teilchens von denen im Standardmodell vorausgesagten würden einen indirekten Hinweis auf Physik jenseits des Standardmodells liefern. Dieses Projekt widmet sich der Messung von Prozessen, die eine Bestimmung der Kopplungen des Higgsbosons an schwere Quarks (bottom und top quarks) ermöglicht. Eine weitere Komponente dieses Projektes ist die Suche nach einer direkten Manifestation neuer Physik in Form der Erzeugung supersymmetrischer Teilchen, die markante Zerfallsignaturen im Detektor hinterlassen. Weiterhin werden  Präzisionsmessungen des Standardmodells immer wichtiger, um die Untergrundereignisse für Suchen nach neuer Physik präzise zu bestimmen.  Ein Nebenprodukt dieser Studien ist eine präzise Messung der Kopplung der top quarks an Vektorbosonen, welche ebenfalls ein wichtiger Parameter des Standardmodells darstellt.  Dieses Projekt unterstützt weiterhin die Arbeit von ETH Wissenschaftlerinnen und  Wissenschaftler am Upgrade des CMS Barrel-Pixel-Detektors für den "Phase 2” Ausbau des LHC, welcher nach 2024-26 stattfinden wird. Die Datennahme in  Phase 2 ist charakterisiert durch ausserordentlich hohe Teilchenraten, die die Detektorkomponenten bearbeiten müssen, weshalb eine feinere Granularität der  Ausleseelektronik nötig wird. Die hohe Strahlenbelastung ist ebenfalls eine Herausforderung für den Design der Detektorkomponenten. Diese Arbeit wird in enger Zusammenarbeit mit Mitarbeitern des Paul-Scherrer-Instituts durchgeführt.
Direct link to Lay Summary Last update: 01.07.2018

Responsible applicant and co-applicants

Employees

Project partner

Publications

Publication
B-tagging performance of the CMS Legacy dataset 2018
CMS Collaboration (2021), B-tagging performance of the CMS Legacy dataset 2018, CERN, Geneve.
Study and parameter optimization of a tuning method for the online calibration of the RD53A readout chip
Backhaus M., Garcia-Sciveres M., Glessgen F., Heim T., Ristic B., Wallny R. (2020), Study and parameter optimization of a tuning method for the online calibration of the RD53A readout chip, in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detector, 984, 164594-164594.
Study and parameter optimization of a tuning method for the online calibration of the RD53A readout chip
Backhaus M., Garcia-Sciveres M., Glessgen F., Heim T., Ristic B., Wallny R. (2020), Study and parameter optimization of a tuning method for the online calibration of the RD53A readout chip, in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detector, 984, 164594-164594.
Search for the Higgs boson in the associated vector boson production mode where the vector boson decays leptonically and the Higgs boson decays to a pair of bottom quarks
Gedia Krunal Bipin (2020), Search for the Higgs boson in the associated vector boson production mode where the vector boson decays leptonically and the Higgs boson decays to a pair of bottom quarks, in European Physical Society Conference on High Energy Physics, Ghent, BelgiumPoS: Proceedings of Science, Sissa.
Serial powering in four-chip prototype RD53A modules for Phase 2 upgrade of the CMS pixel detector
Perovic Vasilije (2020), Serial powering in four-chip prototype RD53A modules for Phase 2 upgrade of the CMS pixel detector, in Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detector, 978, 164436-164436.
Prototype Module Construction for the High Luminosity Upgrade of the CMS Pixel Detector
Ristic Branislav (2020), Prototype Module Construction for the High Luminosity Upgrade of the CMS Pixel Detector, in The 28th International Workshop on Vertex Detectors, Lopud, CroatiaPoS Vertex2019 (2020) 058, Croatia.
Prototype Module Construction for the High Luminosity Upgrade of the CMS Pixel Detector
Ristic Branislav (2020), Prototype Module Construction for the High Luminosity Upgrade of the CMS Pixel Detector, in The 28th International Workshop on Vertex Detectors, Lopud, CroatiaPoS Vertex2019 (2020) 058, Sissa.
Serial powering and high hit rate efficiency measurement for the Phase 2 Upgrade of the CMS Pixel Detector
Ruini D. (2019), Serial powering and high hit rate efficiency measurement for the Phase 2 Upgrade of the CMS Pixel Detector, in Journal of Instrumentation, 14(10), C10024-C10024.
The Upgrade of the CMS Inner Tracker for HL-LHC
Backhaus M. (2019), The Upgrade of the CMS Inner Tracker for HL-LHC, in Journal of Instrumentation, 14(10), C10017-C10017.
Performance of missing transverse momentum reconstruction in proton-proton collisions at √ s = 13 TeV using the CMS detector
Sirunyan A.M., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., Brandstetter J., Dragicevic M., Erö J., Valle A. Escalante Del, Flechl M., Frühwirth R., Ghete V.M., Hrubec J., Jeitler M., Krammer N., Krätschmer I., Liko D., Madlener T., Mikulec I., Rad N., Rohringer H., Schieck J., Schöfbeck R., et al. (2019), Performance of missing transverse momentum reconstruction in proton-proton collisions at √ s = 13 TeV using the CMS detector, in Journal of Instrumentation, 14(07), P07004-P07004.
Measurement of ttH production in the H-->bb decay channel in 41.5 fb-1 of proton proton collision data at √s=13 TeV
CMS Collaboration (2019), Measurement of ttH production in the H-->bb decay channel in 41.5 fb-1 of proton proton collision data at √s=13 TeV, CERN, Geneve.
Higgs Physics at HL-LHC & HE-LHC
CepedaMaria (2019), Higgs Physics at HL-LHC & HE-LHC, CERN, Geneve.
A MIP Timing Detector for the CMS Phase-2 Upgrade
ContardoDidier, BallAustin (2019), A MIP Timing Detector for the CMS Phase-2 Upgrade, CERN, Geneve.
Search for supersymmetric partners of electrons and muons in proton–proton collisions at s=13TeV
Sirunyan A.M., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., Brandstetter J., Brondolin E., Dragicevic M., Erö J., Escalante Del Valle A., Flechl M., Frühwirth R., Ghete V.M., Hrubec J., Jeitler M., Krammer N., Krätschmer I., Liko D., Madlener T., Mikulec I., Rad N., Rohringer H., Schieck J., et al. (2019), Search for supersymmetric partners of electrons and muons in proton–proton collisions at s=13TeV, in Physics Letters B, 790, 140-166.
Observation of Higgs Boson Decay to Bottom Quarks
Sirunyan A. M., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., Brandstetter J., Dragicevic M., Erö J., Escalante Del Valle A., Flechl M., Frühwirth R., Ghete V. M., Hrubec J., Jeitler M., Krammer N., Krätschmer I., Liko D., Madlener T., Mikulec I., Rad N., Rohringer H., Schieck J., Schöfbeck R., et al. (2018), Observation of Higgs Boson Decay to Bottom Quarks, in Physical Review Letters, 121(12), 121801-121801.
Search for new phenomena in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV
Sirunyan A. M., Tumasyan A., Adam W., Ambrogi F., Asilar E., Bergauer T., Brandstetter J., Brondolin E., Dragicevic M., Erö J., Flechl M., Friedl M., Frühwirth R., Ghete V. M., Grossmann J., Hrubec J., Jeitler M., König A., Krammer N., Krätschmer I., Liko D., Madlener T., Mikulec I., Pree E., et al. (2018), Search for new phenomena in final states with two opposite-charge, same-flavor leptons, jets, and missing transverse momentum in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV, in Journal of High Energy Physics, 2018(3), 76-76.

Collaboration

Group / person Country
Types of collaboration
CMS Experiment at CERN Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
ML4Jets 2020 Talk given at a conference ​Jet substructure tagging and pileup mitigation at CMS 15.01.2020 New York, United States of America Gomez Espinosa Alejandro;
Ciclo de conferencias Latitud Cero 2020 Talk given at a conference ​Entre quarks y chocolate suizo 09.01.2020 Quito, Ecuador Gomez Espinosa Alejandro;
Hiroshima Symposium on the Development and Application of Semiconductor Tracking Detectors Talk given at a conference ​Serial powering for the Phase 2 upgrade of the CMS pixel detector 14.12.2019 Hiroshima, Japan Perovic Vasilije;
Particle Physics Seminar Talk given at a conference ​Development of the CMS pixel detector for the HL-LHC 02.12.2019 Dortmund, Germany Ristic Branislav;
The International Workshop on Vertex Detectors (VERTEX) 2019 Poster ​Prototype Module Construction for the High-Luminosity Upgrade of the CMS Pixel Detector 13.10.2019 Lopud, Croatia Ristic Branislav;
Zurich PhD Seminar Talk given at a conference ​New Machine Learning based classifiers forthe ttH(H→bb) analysis 09.10.2019 PSI, Villigen, Switzerland Reissel Christina;
Higgs couplings 2019 Talk given at a conference Measurement of ttH(bb) in proton-proton collision data at 13 TeV 30.09.2019 Oxford, Great Britain and Northern Ireland Meinhard Maren Tabea;
CERN Spanish Language Teacher Programme Talk given at a conference ​Introducción a la física experimental de partículas 27.09.2019 Geneva, Switzerland Gomez Espinosa Alejandro;
31st Rencontres de Blois on "Particle Physics and Cosmology" Talk given at a conference ​Searches for boosted objects at ATLAS and CMS 02.06.2019 Blois, France Gomez Espinosa Alejandro;
Lake Louise Winter Institute 2019 Talk given at a conference ​Observation of Hbb at CMS 10.02.2019 Lake Louise, Canada Berger Pirmin;
Top 2018 Talk given at a conference ​t(t)+X reconstruction techniques 17.09.2018 Bad Neuenahr, Germany Meinhard Maren Tabea;


Communication with the public

Communication Title Media Place Year
Talks/events/exhibitions Dürrenmatt und die Physiker German-speaking Switzerland 2021
Media relations: print media, online media Die zukünftige Strategie der europäischen Teilchenphysik nimmt Gestalt an NZZ German-speaking Switzerland 2020
Media relations: print media, online media Ein kleiner Schritt zur grossen Weltmaschine Tagesanzeiger German-speaking Switzerland 2020

Associated projects

Number Title Start Funding scheme
166294 Characterization of the Higgs Boson and Searches for Supersymmetry with CMS 01.04.2016 Project funding
201476 FLARE 2021-2025: Operation, Computing and Upgrades of the CMS Experiment 01.04.2021 FLARE
186172 FLARE - Computing Infrastructure for LHC Experiments 01.04.2019 FLARE
175625 Exploitation and Upgrades of the CMS experiment at the LHC 01.10.2017 Project funding
186238 FLARE 2019-2021: Operation, Computing and Upgrades of the CMS Experiment 01.04.2019 FLARE
200642 Measurement of Higgs Boson Properties with CMS and Search for Lepton Flavor Violation with Mu3e 01.04.2021 Project funding
173602 FLARE 2017-2019: Operation, Computing and Upgrades of the CMS Experiment 01.04.2017 FLARE
173600 FLARE - GRID Infrastructure for LHC Experiments 01.04.2017 FLARE
160814 Particle Physics with high-quality data from the CERN LHC 01.10.2015 Sinergia
173598 FLARE: Maintenance & Operation for the LHC Experiments 2017-2020 01.04.2017 FLARE

Abstract

With this continuation grant proposal, we would like to request support for our research program in high energy particle physics tackling fundamental questions of the field. The research proposed is conducted with the Compact Muon Solenoid (CMS) experiment operating at the Large Hadron Collider (LHC) at the European Center for Particle Physics (CERN). The proposal is driven by the exploitation of LHC Run 2 at 13 TeV that is now underway providing excellent prospects for the exploration of physics at the TeV energy scale. We also prepare for the upgrades of the CMS detector necessitated by the continuing and future improvements of the LHC accelerator. With the spectacular discovery of a Higgs boson at CERN, a success to which scientists of this proposal have contributed in a leading manner, the measurement of its properties becomes a high priority in order to elucidate whether the new particle indeed plays a crucial role in the mechanism of electroweak symmetry breaking. The Higgs mechanism is an important part of the Standard Model (SM) of particle physics and hence its study is one of the most important goals in the field. However, the precision measurements of the Higgs boson’s properties might furthermore reveal whether there is physics Beyond the Standard Model (BSM), such as Supersymmetry (SUSY). Such physics is expected, since without it counterintuitive (and hence theoretically unattractive) fine tuning in the Higgs boson’s radiative corrections would be required to stabilize the Higgs boson mass at its relatively low measured mass value. In addition, astronomical observations suggest that there is “Dark Matter” in the Universe, the particle physics description of which is still lacking and for which SUSY could provide a viable particle candidate.This proposal attacks these issues in a three-fold manner. We will attempt to firmly establish the Higgs boson decay mode into two b-quarks using the production mode in association with a vector boson (W or Z) as well as in association with a top quark pair. We will also exploit jet substructure techniques to identify highly boosted b-jets. The two processes will provide information to extract the coupling of Higgs bosons to b quarks and vector bosons as well as the top quark-Yukawa coupling to the Higgs field, all fundamental parameters of electroweak symmetry breaking.We continue the search for SUSY using leptonic signatures and expand our searches to include soft leptons in the final state. In the current regime of searches at the LHC, the precision determination of SM backgrounds to search channels becomes a very important task. We therefore mount an initiative to measure vector boson associated top quark pair production that also allows the extraction of the top-vector boson coupling, an important SM parameter.Our proposal further requests support to launch hardware work for the upgrades of one of the key components of CMS, the barrel pixel detector. After the successful commissioning of the phase 1 upgrade pixel detector in spring and summer of 2017, we are now preparing the design and prototyping phase for the phase 2 upgrade of the pixel detector that is planned to be commissioned in 2025. Within CMS several consortia have formed to collaborate on the phase 2 upgrade of the pixel detector, with ETH Zurich, PSI and University of Zurich forming the Swiss consortium. The ETH Zurich group is leading the phase 2 pixel module design effort of CMS and is also playing a leading role in the development of a novel serial module powering concept.
-