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Particle Physics with high-quality data from the CERN LHC

English title Particle Physics with high-quality data from the CERN LHC
Applicant Gehrmann Thomas
Number 160814
Funding scheme Sinergia
Research institution Institut für Theoretische Physik Universität Zürich
Institution of higher education University of Zurich - ZH
Main discipline Particle Physics
Start/End 01.10.2015 - 30.09.2018
Approved amount 1'875'000.00
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Keywords (3)

Elementary Particles; Collider Physics; Quantum Field Theory

Lay Summary (German)

Lead
Nach einer erfolgreichen Datennahme in den Jahren 2010-2012 wurde der CERN LHC vor kurzem bei höherer Kollisionsenergie in Betrieb genommen. Der zu erwartende Datensatz wird eine Vielzahl neuer teilchenphysikalischer Studien ermöglichen, beispielsweise die genaue Bestimmung von Teilchenmassen und Kopplungen, die Vermessung des neu entdeckten Higgs-Bosons sowie die Suche nach neuen Teilchen und Phänomenen bei höchsten Energieskalen und Sensitivitäten. Die Interpretation dieser Daten erfordert eine enge Zusammenarbeit von Gruppen der theoretischen und experimentellen Teilchenphysik, welche in diesem Sinergia-Konsortium realisiert wird.
Lay summary

Die Zusammenarbeit zwischen Theorie und Experiment umfasst weite Bereiche der LHC-Physik. Die Simulation von Teilchenkollisionen ist ein zentraler Teil der experimentellen Kalibration und Datenanlyse, und Simulationsprogramme werden anhand neuer theoretischer Erkenntnisse kontinuierlich verbessert. Präzisionsmessungen von Teilchenmassen und Kopplungen erfordern hochgenaue theoretische Vorhersagen, um die gemessenen Daten zu den Theorie-Parametern in Beziehung zu bringen. Studien des Higgs-Bosons und die Suche nach neuen Elementarteilchen basieren auf einer Trennung von Signal und Untergrundprozessen, welche beide präzise vorhergesagt werden müssen. In diesem Sinergia-Konsortium arbeiten theoretische und experimentelle Gruppen eng zusammen, um die CERN LHC Daten optimal für teilchenphysikalische Studien und Messungen aufzubereiten.

Die Arbeit konzentriert sich insbesondere auf drei Arten von Messungen: (1) Die Produktion eines Higgs-Bosons zusammen mit einem Top-Quark-Paar, insbesondere in Hinblick auf eine Messung der Top-Quark Yukawa Kopplung und zum Verständnis der Quarkmassen. (2) Das Studium fundamentaler Streuprozesse für Präzisionsstudien der Teilchenphysik, und zur Optimierung von Strategien zur Datenauswahl und Analyse. (3) Das Studium neuer Effekte in Verbindung mit dem Higgs-Boson, insbesondere in Zusammenhang mit der Flavor-Struktur der Teilchenphysik.

In jedem dieser Themenbereiche planen wir substantielle Verbesserungen der theoretischen Vorhersagen, jeweils in unmittelbarem Zusammenhang mit den experimentellen Messungen.

Direct link to Lay Summary Last update: 15.10.2015

Responsible applicant and co-applicants

Employees

Publications

Publication
New NLOPS predictions for tt+b-jet production at the LHC
Ježo Tomáš, Lindert Jonas M., Moretti Niccolo, Pozzorini Stefano (2018), New NLOPS predictions for tt+b-jet production at the LHC, in The European Physical Journal C, 78(6), 502-502.
A theoretical study of top-mass measurements at the LHC using NLO+PS generators of increasing accuracy
Ferrario Ravasio Silvia, Ježo Tomáš, Nason Paolo, Oleari Carlo (2018), A theoretical study of top-mass measurements at the LHC using NLO+PS generators of increasing accuracy, in The European Physical Journal C, 78(6), 458-458.
LHC and its impact on nCTEQ15 PDFs
Clark D. Benjamin, Godat Eric, Jezo Tomas, Keppel Cynthia, Kovarik Karol, Kusina Aleksander, LYONNET Florian, Morfin Jorge G., Olness Fred, Owens Joseph Francis, SCHIENBEIN Ingo, Yu Ji-Young (2018), LHC and its impact on nCTEQ15 PDFs, in XXV International Workshop on Deep-Inelastic Scattering and Related Subjects, University of Birmingham, Birmingham, UKPoS, Trieste.
A three-site gauge model for flavor hierarchies and flavor anomalies
Bordone Marzia, Cornella Claudia, Fuentes-Martin Javier, Isidori Gino (2018), A three-site gauge model for flavor hierarchies and flavor anomalies, in Phys. Lett., B779, 317-323.
Constraining anomalous gluon self-interactions at the LHC: a reappraisal
Hirschi Valentin, Maltoni Fabio, Tsinikos Ioannis, Vryonidou Eleni (2018), Constraining anomalous gluon self-interactions at the LHC: a reappraisal, in JHEP, 07, 093-093.
Constraining Extended Scalar Sectors at the LHC and beyond
Ilnicka Agnieszka, Robens Tania, Stefaniak Tim (2018), Constraining Extended Scalar Sectors at the LHC and beyond, in Mod. Phys. Lett., A33(10n11), 1830007-1830007.
Electroweak Precision Tests in High-Energy Diboson Processes
Franceschini Roberto, Panico Giuliano, Pomarol Alex, Riva Francesco, Wulzer Andrea (2018), Electroweak Precision Tests in High-Energy Diboson Processes, in JHEP, 02, 111-111.
Higgs boson production at large transverse momentum within the SMEFT: analytical results
Grazzini Massimiliano, Ilnicka Agnieszka, Spira Michael (2018), Higgs boson production at large transverse momentum within the SMEFT: analytical results, in Eur. Phys. J., C78(10), 808-808.
Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV
Sirunyan A. M., others (2018), Identification of heavy-flavour jets with the CMS detector in pp collisions at 13 TeV, in JINST, 13(05), 05011-05011.
Low-energy signatures of the $\mathrm{PS}^3$ model: from $B$-physics anomalies to LFV
Bordone Marzia, Cornella Claudia, Fuentes-Martín Javier, Isidori Gino (2018), Low-energy signatures of the $\mathrm{PS}^3$ model: from $B$-physics anomalies to LFV, in JHEP, 10, 148-148.
Observation of ttH Production
CMS Collaboration (2018), Observation of ttH Production, in PHYSICAL REVIEW LETTERS, 120, 231801.
Revisiting R-parity violating interactions as an explanation of the B-physics anomalies
Trifinopoulos Sokratis (2018), Revisiting R-parity violating interactions as an explanation of the B-physics anomalies, in Eur. Phys. J., C78(10), 803-803.
Search for $\mathrmtøverline{\mathrmt}$H production in the all-jet final state in proton-proton collisions at $\sqrts=$ 13 TeV
Sirunyan Albert M, others (2018), Search for $\mathrmtøverline{\mathrmt}$H production in the all-jet final state in proton-proton collisions at $\sqrts=$ 13 TeV, in JHEP, 06, 101-101.
The automation of next-to-leading order electroweak calculations
Frederix R., Frixione S., Hirschi V., Pagani D., Shao H. -S., Zaro M. (2018), The automation of next-to-leading order electroweak calculations, in JHEP, 07, 185-185.
Two-loop anomalous dimensions of generic dijet soft functions
Bell Guido, Rahn Rudi, Talbert Jim (2018), Two-loop anomalous dimensions of generic dijet soft functions, in Nucl. Phys., B936, 520-541.
Vectorlike fermions and Higgs effective field theory revisited
Chen Chien Yi, Chen Chien Yi, Dawson S., Furlan Elisabetta (2017), Vectorlike fermions and Higgs effective field theory revisited, in Physical Review D, (1), 72/7.
Determination of the strong coupling constant $α_s(M_Z)$ in next-to-next-to-leading order QCD using H1 jet cross section measurements
Andreev V., others (2017), Determination of the strong coupling constant $α_s(M_Z)$ in next-to-next-to-leading order QCD using H1 jet cross section measurements, in Eur.Phys.J., C77, 791.
Differential single jet inclusive production at Next-to-Next-to-Leading Order in QCD
Currie James, Gehrmann-De Ridder Aude, Gehrmann Thomas, Glover E. W. N., Huss Alexander, Pires Joao (2017), Differential single jet inclusive production at Next-to-Next-to-Leading Order in QCD, in 52nd Rencontres de Moriond on QCD and High Energy Interactions (Moriond QCD 2017) La Thuile, Italy, , ASRL, Orsay.
Energy helps accuracy: electroweak precision tests at hadron colliders
Farina Marco, Panico Giuliano, Pappadopulo Duccio, Ruderman Joshua T., Torre Riccardo, Wulzer Andrea (2017), Energy helps accuracy: electroweak precision tests at hadron colliders, in Phys. Lett. B, 772, 210.
Handbook of LHC Higgs Cross Sections: 4. Deciphering the Nature of the Higgs Sector
de Florian D., others (2017), Handbook of LHC Higgs Cross Sections: 4. Deciphering the Nature of the Higgs Sector, in CERN Yellow Report, 002.
Next-to-leading order QCD predictions for top-quark pair production with up to three jets
Höche Stefan, Maierhoefer Philipp, Moretti Niccolo, Pozzorini Stefano, Siegert Frank (2017), Next-to-leading order QCD predictions for top-quark pair production with up to three jets, in Eur. Phys. J., C77, 145.
Next-to-leading-order QCD and electroweak corrections to WWW production at proton-proton colliders
Dittmaier Stefan, Huss Alexander, Knippen Gernot (2017), Next-to-leading-order QCD and electroweak corrections to WWW production at proton-proton colliders, in JHEP, 034-034.
NNLO QCD corrections to event orientation in e+e- annihilation
Gehrmann Thomas, Glover Nigel, Huss Alexander, Niehues Jan, Zhang Hantian (2017), NNLO QCD corrections to event orientation in e+e- annihilation, in Phys. Lett. B, 775, 185.
NNLO QCD corrections to jet production in deep inelastic scattering
Currie James, Gehrmann Thomas, Huss Alexander, Niehues Jan (2017), NNLO QCD corrections to jet production in deep inelastic scattering, in JHEP, 018-018.
Non-global and rapidity logarithms in narrow jet broadening
Becher Thomas, Rahn Rudi, Shao Ding Yu (2017), Non-global and rapidity logarithms in narrow jet broadening, in JHEP, 10, 030-030.
Non-global and rapidity logarithms in narrow jet broadening
Becher Thomas, Rahn Rudi, Shao Ding Yu (2017), Non-global and rapidity logarithms in narrow jet broadening, in JHEP, 10, 030-030.
Precise predictions for dijet production at the LHC
Currie James, Gehrmann-De Ridder Aude, Gehrmann Thomas, Glover E. W. N., Huss Alexander, Pires Joao (2017), Precise predictions for dijet production at the LHC, in Phys. Rev. Lett., 119, 152001.
Precise predictions for the angular coefficients in Z-boson production at the LHC
Gauld R., Gehrmann-De Ridder A., Gehrmann T., Glover E. W. N., Huss A. (2017), Precise predictions for the angular coefficients in Z-boson production at the LHC, in JHEP, 11, 003.
Precise predictions for V+jets dark matter backgrounds
Lindert J. M., others (2017), Precise predictions for V+jets dark matter backgrounds, in Eur.Phys.J., C77, 829.
Search for high-mass diphoton resonances in proton–proton collisions at 13 TeV and combination with 8 TeV search
Khachatryan Vardan, others (2017), Search for high-mass diphoton resonances in proton–proton collisions at 13 TeV and combination with 8 TeV search, in Phys. Lett., B767, 147-170.
Single Jet Inclusive Production for the Individual Jet $p_{\rm T}$ Scale Choice at the LHC
Currie James, Glover E. W. N., Gehrmann Thomas, Gehrmann-De Ridder Aude, Huss Alexander, Pires Joao (2017), Single Jet Inclusive Production for the Individual Jet $p_{\rm T}$ Scale Choice at the LHC, in Proceedings, 23rd Cracow Epiphany Conference on Particle Theory Meets the First Data from LHC Run 2:, 955-967, Acta Physica Polonica, Warschau955-967.
Strongly Interacting Light Dark Matter
Bruggisser Sebastian, Riva Francesco, Urbano Alfredo (2017), Strongly Interacting Light Dark Matter, in Sci.Post.Phys., 3, 017.
750 GeV Diphoton Excess from the Goldstino Superpartner
Petersson Christoffer, Torre Riccardo (2016), 750 GeV Diphoton Excess from the Goldstino Superpartner, in Phys. Rev. Lett., (15), 151804-151804.
An NLO+PS generator for $t\bart$ and $Wt$ production and decay including non-resonant and interference effects
Ježo Tomáš, Lindert Jonas M., Nason Paolo, Oleari Carlo, Pozzorini Stefano (2016), An NLO+PS generator for $t\bart$ and $Wt$ production and decay including non-resonant and interference effects, in Eur.Phys.J., C76, 691.
Conditions on the violation of the cluster decomposition property in QCD
Lowdon Peter (2016), Conditions on the violation of the cluster decomposition property in QCD, in J.Math.Phys., 57, 102302.
CP-even scalar boson production via gluon fusion at the LHC
Anastasiou Charalampos, Duhr Claude, Dulat Falko, Furlan Elisabetta, Gehrmann Thomas, Herzog Franz, Lazopoulos Achilleas, Mistlberger Bernhard (2016), CP-even scalar boson production via gluon fusion at the LHC, in JHEP, 037-037.
Digamma, what next?
Franceschini Roberto, Giudice Gian F., Kamenik Jernej F., McCullough Matthew, Riva Francesco, Strumia Alessandro, Torre Riccardo (2016), Digamma, what next?, in JHEP, 150-150.
High precision determination of the gluon fusion Higgs boson cross-section at the LHC
Anastasiou Charalampos, Duhr Claude, Dulat Falko, Furlan Elisabetta, Gehrmann Thomas, Herzog Franz, Lazopoulos Achilleas, Mistlberger Bernhard (2016), High precision determination of the gluon fusion Higgs boson cross-section at the LHC, in JHEP, 058-058.
Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC pp collision data at $ \sqrts=7 $ and 8 TeV
Aad Georges, others (2016), Measurements of the Higgs boson production and decay rates and constraints on its couplings from a combined ATLAS and CMS analysis of the LHC pp collision data at $ \sqrts=7 $ and 8 TeV, in JHEP, 045-045.
Measuring the signal strength in $t øverlinetH$ with $H→bøverlineb$
Moretti Niccolo, Petrov Petar, Pozzorini Stefano, Spannowsky Michael (2016), Measuring the signal strength in $t øverlinetH$ with $H→bøverlineb$, in Phys. Rev., (1), 014019-014019.
Next-to-next-to-leading logarithmic resummation for transverse thrust
Becher Thomas, Garcia i Tormo Xavier, Piclum Jan (2016), Next-to-next-to-leading logarithmic resummation for transverse thrust, in Phys. Rev., (5), 054038-054038.
NNLO QCD corrections for Drell-Yan $p_T^Z$ and $ϕ^*$ observables at the LHC
Gehrmann-De Ridder A., Gehrmann T., Glover E. W. N., Huss A., Morgan T. A. (2016), NNLO QCD corrections for Drell-Yan $p_T^Z$ and $ϕ^*$ observables at the LHC, in JHEP, 094-094.
Patterns of Strong Coupling for LHC Searches
Liu Da, Pomarol Alex, Rattazzi Riccardo, Riva Francesco (2016), Patterns of Strong Coupling for LHC Searches, in JHEP, 11, 141.
What is the $γ γ$ resonance at 750 GeV?
Franceschini Roberto, Giudice Gian F., Kamenik Jernej F., McCullough Matthew, Pomarol Alex, Rattazzi Riccardo, Redi Michele, Riva Francesco, Strumia Alessandro, Torre Riccardo (2016), What is the $γ γ$ resonance at 750 GeV?, in JHEP, 144-144.
Z+jet production at NNLO
Gehrmann-De Ridder A., Gehrmann T., Glover E. W. N., Huss Alexander, Morgan T. A. (2016), Z+jet production at NNLO, in Proceedings, 38th International Conference on High Energy Physics (ICHEP 2016): Chicago, IL, USA, Au, 594-594, PoS, Trieste594-594.
Addendum: Electroweak Sudakov effects in W, Z and gamma production at large transverse momentum
Becher Thomas, Garcia i Tormo Xavier (2015), Addendum: Electroweak Sudakov effects in W, Z and gamma production at large transverse momentum, in Phys. Rev., (7), 073011-073011.
Search for a Standard Model Higgs Boson Produced in Association with a Top-Quark Pair and Decaying to Bottom Quarks Using a Matrix Element Method
Khachatryan Vardan, others (2015), Search for a Standard Model Higgs Boson Produced in Association with a Top-Quark Pair and Decaying to Bottom Quarks Using a Matrix Element Method, in Eur. Phys. J., (6), 251-251.

Collaboration

Group / person Country
Types of collaboration
CERN Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
Univ. Mainz Germany (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
Univ. Durham Great Britain and Northern Ireland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
Univ. Firenze and INFN Firenze Italy (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel
CMS experiment Switzerland (Europe)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Research Infrastructure
- Exchange of personnel
Univ. Buenos Aires Argentina (South America)
- in-depth/constructive exchanges on approaches, methods or results
- Publication
- Exchange of personnel

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
QCD@LHC 2018 Talk given at a conference Automated calculation of two-loop soft functions in SCET 27.08.2018 Dresden, Germany Rahn Rudi Michael;
LoopFest 2018 Talk given at a conference Automated calculation of two-loop soft functions in SCET 16.07.2018 East Lansing, United States of America Rahn Rudi Michael;
Theoretical Physics Department, Fermilab Individual talk Automated calculation of two-loop soft functions in SCET 13.07.2018 Batavia, United States of America Rahn Rudi Michael;
Parton Showers, Event Generators and Resummation (PSR 2018) Talk given at a conference Non-global logarithms in jet and isolation cone cross sections 04.06.2018 Lund, Sweden Becher Thomas;
Sinergia Meeting Talk given at a conference Logarithmic beasts and how to tame them 07.12.2017 Lausanne, Switzerland Rahn Rudi Michael;
ATLAS Standard Model Workshop Talk given at a conference NNLO Calculations for Jets & Vector Boson with Jets 19.09.2017 Thessaloniki, Greece Huss Alexander;
Top2017 Workshop Talk given at a conference Top Quark Production: modeling and tuning in Powheg 17.09.2017 Bom Jesus, Braga, Portugal Jezo Tomas;
ATLAS Higgs and B-tagging Workshop Talk given at a conference WbWb production with POWHEG BOX RES 05.09.2017 Simons Center for Geometry and Physics, Stony Brook, New York, United States of America Jezo Tomas;
QCD@LHC 2017 Talk given at a conference NLO matching for ttbb production with massive b-quarks 28.08.2017 University of Debrecen, Debrecen, Hungary Jezo Tomas;
QCD@LHC 2017 Talk given at a conference A Study of the Top Mass Determination Using New NLO+PS generators 28.08.2017 University of Debrecen, Debrecen, Hungary Jezo Tomas;
Higgs Hunting 2017 Talk given at a conference H(125) decay to bb at CMS 24.07.2017 Orsay-Paris, France Donato Silvio;
EPS HEP 2017, EPS conference on High Energy Physics Talk given at a conference Precise predictions for V+jet production 06.07.2017 Venice, Italy Huss Alexander;
Automated, Resummed and Effective: Precision Computations for the LHC and Beyond Talk given at a conference Resonance aware matching at NLO 24.06.2017 MIAPP, Munich, Germany Jezo Tomas;
Theory Institute, CERN, LHC and the Standard Model: Physics and Tools Talk given at a conference Z +jet observables at NNLO 20.06.2017 CERN, Geneva, Switzerland Gehrmann-De Ridder Aude;
Physics Modelling Group Plenary in ATLAS week Talk given at a conference NLO+PS with decaying resonances using POWHEG 20.06.2017 Cern, Geneva, Switzerland Jezo Tomas;
4th CMS Single Top Workshop Talk given at a conference SM modelling, updates on the simulation tools: POWHEG 08.06.2017 KIT, Karlsruhe, Germany Jezo Tomas;
Meeting of the ttH/tH HXSWG subgroup Talk given at a conference A Powheg generator for ttbb production in the 4F scheme 06.06.2017 Cern, Geneva, Switzerland Jezo Tomas;
LHCP 2017, The Fifth Annual Large Hadron Collider Physics Conference Talk given at a conference NNLO QCD for p_t^Z and \phi^*_\eta” 17.05.2017 Shangai, China Huss Alexander;
25th International Workshop on Deep Inelastic Scattering and Related Topics Talk given at a conference A Study of the Top Mass Determination Using New NLO+PS generators 03.04.2017 University of Birmingham, Birmingham, Great Britain and Northern Ireland Jezo Tomas;
25th International Workshop on Deep Inelastic Scattering and Related Topics Talk given at a conference NLO matching for ttbb production with massive b-quarks 03.04.2017 University of Birmingham, Birmingham, Great Britain and Northern Ireland Jezo Tomas;
The XIVth annual workshop on Soft-Collinear Effective Theory (SCET 2017) Talk given at a conference Automated computations for SCET soft functions in the presence of clustering effects 14.03.2017 Seattle, United States of America Rahn Rudi Michael;
ZPW 2017, Zurich Phenomenology Workshop 2017 Talk given at a conference NNLO V+jet 10.01.2017 Zurich, Switzerland Huss Alexander;
LHC Top Working Group meeting Talk given at a conference Latest Developments in POWHEG 21.11.2016 Cern, Geneva, Switzerland Jezo Tomas;
VII Workshop italiano sulla fisica pp a LHC Talk given at a conference Higgs boson and quark top: measurements and searches at LHC 16.05.2016 Pisa, Italy Bianchini Lorenzo;
Data Science @ LHC Workshop Talk given at a conference The Matrix Element Method 10.11.2015 CERN, Geneva, Switzerland Bianchini Lorenzo;


Self-organised

Title Date Place
Sinergia Annual Meeting 17.12.2015 EPFL, Switzerland

Associated projects

Number Title Start Funding scheme
154216 FLARE 2014-16: Operation, Computing and Upgrades of the CMS Experiment 01.04.2014 FLARE
160190 Higgs Boson Phenomenology at current and future colliders 01.10.2015 Project funding
175625 Exploitation and Upgrades of the CMS experiment at the LHC 01.10.2017 Project funding
169560 High energy physics research with CMS 2016-2018 01.10.2016 Project funding
162665 Physics at 13 TeV with the CMS experiment at the LHC 01.10.2015 Project funding
152601 Preparation for and exploitation of the CMS data taking at the next LHC run 01.05.2014 SCOPES
160433 FLARE: Maintenance & Operation for the LHC Experiments 2015 01.04.2015 FLARE
156687 Research in High Energy Physics with the CMS Detector 01.10.2014 Project funding
149517 Jet production in higher orders of perturbation theory 01.10.2013 Project funding
178826 Measurement of Higgs Boson Properties and Upgrade of the CMS Pixel Detector for Phase-2 01.04.2018 Project funding
169696 Quantum Field Theory Across the Energy Frontier 01.12.2016 Project funding
160434 FLARE - GRID Infrastructure for LHC Experiments 01.04.2015 FLARE
141847 Particle Physics with high-quality data from the CERN LHC 01.10.2012 Sinergia
156585 Standard Model and Higgs Physics at the LHC 01.10.2014 Project funding
153027 QCD and Electroweak Quantum Corrections at the Large Hadron Collider 01.10.2014 SNSF Professorships
149844 Research in Particle Physics with the CMS detector: Higgs bosons, dark matter, and their association to top quarks 01.10.2013 Project funding
150060 Quantum Field Theory Across the Energy Frontier 01.12.2013 Project funding
153664 Measurements of Higgs boson properties and Searches for Supersymmetry with CMS 01.04.2014 Project funding
149870 Physics at 13-14 TeV with the CMS experiment at the LHC 01.10.2013 Project funding
162487 Jet production in higher orders of perturbation theory 01.10.2015 Project funding
169041 Standard Model and Higgs Physics at the LHC 01.10.2016 Project funding
164791 UNSOLVeD: Exposing the big unknowns of modern scientific research 01.02.2016 Agora
175595 Precision Theory for High-Energy Collider Physics 01.10.2017 Project funding
172478 QCD effects in Higgs-strahlung at the LHC 01.06.2017 Project funding
173357 Probing the Higgs sector at the LHC and beyond 01.05.2018 Argentina (AJRP)
182037 Research in High Energy Physics with the CMS detector: measurements and searches with top quarks 01.10.2018 Project funding

Abstract

Following a very successful data taking period at proton-proton collision energies of 7 and 8 TeV, the CERN LHC is currently being prepared for the next data taking period at an increased energy of 13 TeV. The resulting data-set will allow many precision measurements of Standard Model benchmark processes, it will allow studies of the properties and couplings of the newly discovered Higgs boson, and probe physics effects beyond the Standard Model at energy scales and sensitivity levels that were previously inaccessible. The performance of the CERN LHC and its detectors will produce a large data-set of very high quality. To analyze and interpret the data from the upcoming LHC run, a close collaboration between the experimental and theoretical community is mandatory. Simulation tools based on theory predictions are omnipresent in all aspects of the experimental measurements, and their further development is is pursued continuously.Precision measurements of Standard Model parameters require highly accurate theoretical input to relate the observed cross sections and distributions to the theory parameters. Studies of the Higgs boson and searches for new particles beyond the Standard Model rely on an intricate separation of potential signals from Standard Model background processes, which both need to be predicted to high precision. The Sinergia project we propose will combine the spectrum of skills of the Swiss particle theory groups in view of an optimal exploitation of the CERN LHC data. In close interaction with the experimental groups, we plan to perform calculations of immediate relevance to ongoing and newly proposed experimental data analyses, and aim to identify new observables of high physics impact. In this project, we address three types of observables at the LHC: 1. The production of a Higgs boson in association with a top-antitop-quark pair, by further developing theoretical tools and analyzing the upcoming experimental data. Note that this process is expected to be established with the upcoming data for the first time, thereby offering a direct measurement of the top quark Yukawa coupling. 2. The study of fundamental 2->2 processes, optimizing data selection procedures, in view of precision studies of the Standard Model and indirect searches for physics beyond the Standard Model. 3. The study of new physics effects in the Higgs sector, with particular emphasis on electroweak symmetry breaking and flavor effects. For each of these classes of observables, we plan a broad program of improvements to the theoretical predictions, which coordinates closely with the demands of the corresponding experimental studies. The different subprojects will mutually benefit from each other by exchange of techniques and results. Our work will contribute to sharpen our understanding of elementary particle physics at the Terascale and beyond, which may provide a guide towards a unified theory of fundamental particles and interactions.
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