Präzise Monte-Carlo-Ereignisgeneratoren und LHC-Messungen
Zusammenfassung der Projektergebnisse
The first two data-taking periods of the Large Hadron Collider (LHC) have finished and this immensely successful physics endeavour is in the middle of its third run. During these periods the funding of my DFG Emmy Noether group has enabled me to play a key role in the LHC physics programme while at the same time advancing my teaching and supervision role by building up a vibrant research group at TU Dresden. Together with 3 PhD students and 2 post-docs we have worked at the interface of theoretical and experimental particle physics at the LHC. Precise physics modelling, basically the creation of a digital probabilistic twin of our LHC collision events, is a crucial necessity for experimental analyses like done by the ATLAS and CMS experiments. But our theoretical calculations are not well-suited to give directly a description of a full LHC collision event with its hundreds of final state particles. We are thus employing Monte Carlo event generation programs, which divide such an event into multiple phases, which can be simulated separately. With our group, we have worked on the event generator “Sherpa” and developed it further for complex scattering processes. For this we have utilised our expertise with its state-of-theart techniques for matching and merging higher-order matrix element calculations to parton showers for a precise and fully realistic simulation of LHC collisions. Besides work on the simulation for specific scattering processes, we have studied the general algorithms of Monte Carlo event generators to improve their precision, make them more practical and versatile, and last but not least reduce their calculational footprint for a more sustainable usage of the computing resources in the (high-luminosity) LHC physics programme. In parallel to our theoretical work, and using data from the ATLAS experiment, we have also designed and lead precise measurements of QCD effects in Z-boson production and in diphoton production processes. Trialing new observables and with the help of precise theoretical simulations we have published novel and precise measurements within the ATLAS collaboration. Some of these measurements rely on the theoretical modelling improvements described above, while others can feed into the development of event generators. The very tight connection between both topics has enabled us to shape the physics modelling landscape and expertise of the ATLAS experiment. With many expert contributions and several leadership positions filled from our Emmy Noether group we were able to establish an internationally renowned expertise.
Projektbezogene Publikationen (Auswahl)
-
Beyond standard model calculations with Sherpa. The European Physical Journal C, 75(3).
Höche, Stefan; Kuttimalai, Silvan; Schumann, Steffen & Siegert, Frank
-
Next-to-leading order QCD predictions for top-quark pair production with up to two jets merged with a parton shower. Physics Letters B, 748, 74-78.
Höche, Stefan; Krauss, Frank; Maierhöfer, Philipp; Pozzorini, Stefano; Schönherr, Marek & Siegert, Frank
-
A practical guide to event generation for prompt photon production with Sherpa. Journal of Physics G: Nuclear and Particle Physics, 44(4), 044007.
Siegert, Frank
-
Measurement of the k t splitting scales in Z → ℓℓ events in pp collisions at s = 8 $$ \sqrt{s}=8 $$ TeV with the ATLAS detector. Journal of High Energy Physics, 2017(8).
NA; Aaboud; M.; Aad; G.; Abbott; B.; Abdallah; J.; Abdinov; O.; Abeloos; B.; Abidi; S., H.; AbouZeid; O., S.; Abraham; N., L.; Abramowicz; H.; Abreu; H.; Abreu; R.; Abulaiti; Y.; Acharya; B., S.; Adachi; S.; Adamczyk; L.; Adelman; J.; Adersberger; M.; ...; Zwalinski & L.
-
Measurements of integrated and differential cross sections for isolated photon pair production in pp collisions at s=8 TeV with the ATLAS detector. Physical Review D, 95(11).
Aaboud, M.; Aad, G.; Abbott, B.; Abdallah, J.; Abdinov, O.; Abeloos, B.; Abidi, S. H.; AbouZeid, O. S.; Abraham, N. L.; Abramowicz, H.; Abreu, H.; Abreu, R.; Abulaiti, Y.; Acharya, B. S.; Adachi, S.; Adamczyk, L.; Adelman, J.; Adersberger, M.; Adye, T. ... & Zwalinski, L.
-
Next-to-leading order QCD predictions for top-quark pair production with up to three jets. The European Physical Journal C, 77(3).
Höche, S.; Maierhöfer, P.; Moretti, N.; Pozzorini, S. & Siegert, F.
-
Search for new phenomena in high-mass diphoton final states using 37 fb−1 of proton–proton collisions collected at s=13 TeV with the ATLAS detector. Physics Letters B, 775, 105-125.
Aaboud, M.; Aad, G.; Abbott, B.; Abdinov, O.; Abeloos, B.; Abidi, S.H.; AbouZeid, O.S.; Abraham, N.L.; Abramowicz, H.; Abreu, H.; Abreu, R.; Abulaiti, Y.; Acharya, B.S.; Adachi, S.; Adamczyk, L.; Adelman, J.; Adersberger, M.; Adye, T.; Affolder, A.A. ... & Zwalinski, L.
-
Measurements of Higgs boson properties in the diphoton decay channel with 36 fb−1 of pp collision data at s=13 TeV with the ATLAS detector. Physical Review D, 98(5).
Aaboud, M.; Aad, G.; Abbott, B.; Abdinov, O.; Abeloos, B.; Abidi, S. H.; AbouZeid, O. S.; Abraham, N. L.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Acharya, B. S.; Adachi, S.; Adamczyk, L.; Adelman, J.; Adersberger, M.; Adye, T.; Affolder, A. A.; Afik, Y. ... & Zwalinski, L.
-
Momentum conservation and unitarity in parton showers and NLL resummation. Journal of High Energy Physics, 2018(1).
Höche, Stefan; Reichelt, Daniel & Siegert, Frank
-
NLO QCD predictions for $$Z+\gamma $$ Z + γ + jets production with Sherpa. The European Physical Journal C, 78(2).
Krause, Johannes & Siegert, Frank
-
Event generation with Sherpa 2.2. SciPost Physics, 7(3).
Bothmann, Enrico; Singh, Chahal Gurpreet; Höche, Stefan; Krause, Johannes; Krauss, Frank; Kuttimalai, Silvan; Liebschner, Sebastian; Napoletano, Davide; Schönherr, Marek; Schulz, Holger; Schumann, Steffen & Siegert, Frank
-
Monte Carlo event generators for high energy particle physics event simulation
A. Buckley et al.
-
Multijet merging in a variable flavor number scheme. Physical Review D, 100(1).
Höche, Stefan; Krause, Johannes & Siegert, Frank
-
Resonance-aware subtraction in the dipole method. The European Physical Journal C, 79(9).
Höche, Stefan; Liebschner, Sebastian & Siegert, Frank
-
[HEP Software Foundation], HL-LHC Computing Review: Common Tools and Community Software
T. Aarrestad et al.
-
Les Houches 2019: Physics at TeV Colliders: Standard Model Working Group Report
S. Amoroso et al.
-
Robust Independent Validation of Experiment and Theory: Rivet version 3. SciPost Physics, 8(2).
Bierlich, Christian; Buckley, Andy; Butterworth, Jonathan; Christensen, Christian Holm; Corpe, Louie; Grellscheid, David; Grosse-Oetringhaus, Jan Fiete; Gutschow, Christian; Karczmarczyk, Przemyslaw; Klein, Jochen; Lönnblad, Leif; Pollard, Christopher Samuel; Richardson, Peter; Schulz, Holger & Siegert, Frank
-
[HSF Physics Event Generator WG], “HL-LHC Computing Review Stage-2, Common Software Projects: Event Generators
E. Yazgan et al.
-
Measurement of the production cross section of pairs of isolated photons in pp collisions at 13 TeV with the ATLAS detector. Journal of High Energy Physics, 2021(11).
Aad, G.; Abbott, B.; Abbott, D. C.; Abed, Abud A.; Abeling, K.; Abhayasinghe, D. K.; Abidi, S. H.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Abusleme, Hoffman A. C.; Acharya, B. S.; Achkar, B.; Adam, L.; Adam, Bourdarios C.; Adamczyk, L.; Adamek, L.; Addepalli, S. V. ... & Zwalinski, L.
-
Reducing negative weights in Monte Carlo event generation with Sherpa
K. Danziger; S. Höche & F. Siegert
-
Accelerating Monte Carlo event generation -- rejection sampling using neural network event-weight estimates. SciPost Physics, 12(5).
Danziger, Katharina; Janßen, Timo; Schumann, Steffen & Siegert, Frank
-
Modelling and computational improvements to the simulation of single vector-boson plus jet processes for the ATLAS experiment. Journal of High Energy Physics, 2022(8).
Aad, G.; Abbott, B.; Abbott, D. C.; Abed, Abud A.; Abeling, K.; Abhayasinghe, D. K.; Abidi, S. H.; Aboulhorma, A.; Abramowicz, H.; Abreu, H.; Abulaiti, Y.; Abusleme, Hoffman A. C.; Acharya, B. S.; Achkar, B.; Adam, L.; Adam, Bourdarios C.; Adamczyk, L.; Adamek, L. ... & Zwalinski, L.
