Homepage of Andreas Hinzmann

 

Andreas Hinzmann

Research Staff

Deutsches Elektronen-Synchrotron DESY

FH/CMS

Geb. 01b Raum O1.211

Notkestraße 85

22607 Hamburg, Germany

E-mail: andreas.hinzmann@desy.de

 

 

Research interest
My main interest is in the search for physics beyond the Standard Model of particle physics at high-energy particle colliders. The focus of my current research is on signatures of new physics with highly boosted W,Z and Higgs bosons as well as top quarks detected by the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC). Furthermore, I am interested in the development of jet reconstruction techniques, focusing on highly boosted W, Z and Higgs bosons, and the optimization of the relevant components of future detectors.

 

Searches for new physics
One of the biggest unresolved questions in physics is why there is a hierarchy of many orders of magnitude between the strength of the forces described by the Standard Model (electroweak and strong) and the gravitational force. A unified description of all forces in a common theory must explain this hierarchy. The data that will be provided to the CMS experiment by the Large Hadron Collider (LHC) in the following years may finally shed light on this question. Popular new physics scenarios providing an explanation to this question are extra spacial dimensions or a composite Higgs boson, exhibiting a fundamental common signature at the LHC: resonant deformations of the invariant mass spectra for pair production of highly boosted W, Z and Higgs bosons. In case no such scenario applies, the break down of the electroweak theory at high energies equally leads to deformations (but non-resonant in this case) of these mass spectra. Their measurement at the TeV-scale is thus of highest importance and at the heart of my interests.

Jet reconstruction techniques
W, Z and Higgs bosons decay predominantly into quarks which transform into sprays of particles called jets. In high energy proton-proton collisions at the LHC, the W/Z/H bosons can have such a large momentum that their decay products merge into a single particle jet. What is usually done to identify the decay products of the W/Z/H bosons as separate objects no longer works as they are merged in a single jet. It is therefore important to understand the substructure of these jets to identify the W/Z/H bosons by what is called W/Z/H-tagging. Throughout the run time of the LHC and the future collider HL-LHC, the transverse momenta reached will significantly increase, and at the same time the number of interactions (called pileup) happening in the same proton-proton bunch crossing will increase from order of 20 to 200. My focus is to tackle these two challenges by developing new jet reconstruction techniques and by optimizing the relevant components of future detectors.

Upgrade of the CMS detector
Planning for several accelerator and detector upgrades as well as future colliders are going on in parallel to LHC data taking. In 2025 an upgrade of the LHC to the HL-LHC is planned to reach a total integrated luminosity of 3000/fb. While this allows to explore higher energy and lower probability physics processes, it comes with an additional experimental challenge. On average up to 200 protons, compared to 20 in Run I of the LHC, may collide simultaneously in the detector, thus the detector needs to be able to distinguish particles from the main interaction and those from overlapping interactions, so called pileup. To deal with these new conditions in 2025 upgrades of the CMS tracker, and of the CMS endcap calorimeter are foreseen, which are of particular interest as they will allow resolving jet substructure with higher precision.

Coordination responsibilities in CMS

2023-now Conference committee contact of the B2G physics group

2021-2023 Searches for Beyond SM particles decaying to Higgs, top and Gauge bosons (B2G) physics group convener

2018-2020 Jet and MET algorithms and reconstruction group convener

2014-2017 Jet and MET algorithms group convener
2012-2014 Exotica multijet physics group convener
2010-2012 Physics analysis tools tutorial organizer

 

Outreach and material for the general public

Physik-Projekt-Tage 2023 Hamburg: Program
“Vierblättriger Vektorboson-Klee”, Physik Journal Oktober 2022.

Physik-Projekt-Tage 2022 Hamburg: Program

“Two collisions for the price of one”, CMS Physics Briefings 7.06.2022.

“W, Z, and Higgs bosons as portals to exotic physics”, CMS Physics Briefings 13.05.2022.

“How CMS weeds out particles that pile up”, CMS Physics Briefings 12.09.2019.

Physik-Projekt-Tage 2019 Hamburg: Program

“CMS expands scope of dark-matter search in dijet channel”, CERN COURIER 11.08.2017.

Physik-Projekt-Tage 2018 Hamburg: Program

WiSe 2017/2018 Ringvorlesung „Physik im Alltag“: Das größte Mikroskop der Welt: Der Teilchenbeschleuniger LHC Program Video

 

Scientific workshops and schools
02.-05.04.2024, Terascale Statistics School, 2024, Hamburg
19.-23.02.2024, Terascale Monte Carlo School, 2024, Hamburg
18.-22.03.2024, Introduction to the Terascale School, 2024, Hamburg
12.-13.12.2023, Annual Helmholtz Alliance Workshop on "Physics at the Terascale", Hamburg
06.-10.11.2023, ML4Jets 2023, Hamburg
09.-18.10.2023, CMS Physics Object & Data Analysis School (PO&DAS) 2023, Hamburg
25.-27.4.2022, CMS B2G Spring workshop 2023, CERN
15.-19.8.2022, 14th International Workshop on Boosted Object Phenomenology, Reconstruction and Searches in HEP (BOOST 2022), Hamburg
25.-27.4.2022, CMS B2G Spring workshop 2022, Online
05.-07.11.2020, Physikerinnentagung 2020, Online
19.-24.7.2020, 12th International Workshop on Boosted Object Phenomenology, Reconstruction and Searches in HEP (BOOST 2020), Online
15.-17.4.2019, CMS JetMET workshop 2019, Hamburg
19.-21.9.2018, FSP CMS workshop 2018, Hamburg

Education for physics university students

SoSe 2024 Proseminar Astro/Teilchenphysi (BSc)

WiSe 2023/2024 Proseminar Astro/Teilchenphysik (BSc)
WiSe 2022/2023 Physik V (BSc)

SoSe 2022 Proseminar Astro/Teilchenphysik (BSc)

WiSe 2021/2022 Advanced Particle Physics (MSc)

SoSe 2021 Proseminar Astro/Teilchenphysik (BSc): Vorlesungsverzeichnis

WiSe 2020/2021 Advanced Particle Physics (MSc): Vorlesungsverzeichnis

SoSe 2020 Experiments on Physics Beyond the Standard Model (MSc): Vorlesungsverzeichnis

WiSe 2018/2019 Experiments on Physics Beyond the Standard Model (MSc): Vorlesungsverzeichnis

2018 Summer School Particles, Strings & Cosmology: Program Slides

2017 Summer School Particles, Strings & Cosmology: Program Slides

Presentations
27.01.2022, "Searches for BSM physics at the LHC", KIT particle physics colloquium, Karlsruhe, Online
01.02.2022, "Searches for BSM physics at the LHC", International Webinar on Physics, Online video
25.10.2021, "Jet angularities measurement with CMS", LHC-EW WG: Jets and EW bosons, Online slides
28.07.2021 Andreas Hinzmann, "Searches for Exotica", EPS-HEP2021, Online slides
02.06.2021 Andreas Hinzmann, "Jet substructure measurements with CMS and ATLAS", Jets and their substructure from LHC data CERN-TH workshop, Online slides
26.10.2020, "Jet substructure with CMS", LHC-EW WG: Jets and EW bosons - Jet substructure mini workshop, Online slides
25.09.2020, "Calibrating the CMS Detector", FSP CMS Workshop 2020, Online
26.05.2020, "From raw data to published experimental results at the LHC", RTG Colloquium Physics of the heaviest Particles at the LHC, Aachen
16.9.2019, "The CMS Particle Flow algorithm", CMS Physics Objects School, Aachen slides
26.3.2019, "Direkte Suchen nach neuer Physik -- Zwischenbilanz LHC Run2", DPG conference, Aachen slides
27.8.2018 Andreas Hinzmann, "Prospects for a measurement of the W boson mass in the all-jets final state at hadron colliders", QCD@LHC 2018, Dresden, slides
19.7.2018 Andreas Hinzmann, "Prospects for a measurement of the W boson mass in the all-jets final state at hadron colliders", BOOST 2018, Paris, slides
29.06.2017, "Detection techniques for boosted jets", VBSCan Kickoff meeting, Split, Croatia, slides
26.04.2017, "Boosting physics at the LHC", SFB 676 Colloquium, DESY Hamburg, slides 

Journal publications with significant contributions
CMS Collaboration, “Review of searches for vector-like quarks, vector-like leptons, and heavy neutral leptons in proton-proton collisions at sqrt(s) = 13 TeV at the CMS experiment”, Submitted to Physics Reports (2024) arXiv:2405.17605
CMS Collaboration, “Searches for Higgs Boson Production through Decays of Heavy Resonances”, Submitted to Physics Reports (2024) arXiv:2403.16926
CMS Collaboration, “Observation of same-sign WW production from double parton scattering in proton-proton collisions at sqrt(s) = 13 TeV”, PRL 131 (2023) 091803, arXiv:2206.02681. doi:10.1103/PhysRevLett.131.091803
CMS Collaboration, “Search for new heavy resonances decaying to WW, WZ, ZZ, WH, or ZH boson pairs in the all-jets final state in proton-proton collisions at sqrt(s) = 13 TeV”, Phys. Lett. B 844 (2023) 137813 arXiv:2210.00043. doi.org/10.1016/j.physletb.2023.137813
B. Nachman et al., “Jets and Jet Substructure at Future Colliders”, Front. in Phys. 10 (2022) 897719, arXiv:2203.07462. doi:10.3389/fphy.2022.897719.
CMS Collaboration, “Study of quark and gluon jet substructure in Z+jet and dijet events from pp collisions”, JHEP 01 (2022) 188, arXiv:2109.03340. doi:10.1007/JHEP01(2022)188.
I. Zoi, A. Ebrahimi, F. Feindt et al., “Position resolution with 25m pitch pixel sensors before and after irradiation”, Nucl. Instrum. Meth. A 1021 (2022) 165933, arXiv:2107.04640. doi:10.1016/j.nima.2021.165933.
CMS Collaboration, “Pileup mitigation at CMS in 13 TeV data”, JINST 15 (2020) P09018, arXiv:2003.00503. doi:10.1088/1748-0221/15/09/p09018.
CMS Collaboration, “Identification of heavy, energetic, hadronically decaying particles using machine-learning techniques”, JINST 15 (2020) P06005, arXiv:2004.08262. doi:10.1088/1748-0221/15/06/P06005.
CMS Collaboration, “Search for anomalous triple gauge couplings in WW and WZ production in lepton + jet events in proton-proton collisions at sqrt(s) = 13 TeV”, JHEP 12 (2019) 062, arXiv:1907.08354. doi:10.1007/JHEP12(2019)062.
CMS Collaboration, “A multi-dimensional search for new heavy resonances decaying to boosted WW, WZ, or ZZ boson pairs in the dijet final state at 13 TeV”, Eur. Phys. J. C 80 (2019) 237, arXiv:1906.05977. doi:10.1140/epjc/s10052-020-7773-5.
M. Freytsis, P. Harris, A. Hinzmann et al., “Prospects for a Measurement of the W Boson Mass in the All-Jets Final State at Hadron Colliders”, JHEP 02 (2019) 003, arXiv:1807.07454. doi:10.1007/JHEP02(2019)003.
CMS Collaboration, “Search for a heavy resonance decaying to a top quark and a vector-like top quark in the lepton+jets final state in pp collisions at sqrt(s) = 13 TeV”, Eur. Phys. J. C 79 (2019), no. 3, 208, arXiv:1812.06489. doi:10.1140/epjc/s10052-019-6688-5.
CMS Collaboration, “Search for new physics in dijet angular distributions using proton-proton collisions at sqrt(s)= 13 TeV and constraints on dark matter and other models”, Eur. J. Phys. C 78 (2018) 789, arXiv:1803.08030.
R. Kogler et al., “Jet Substructure at the Large Hadron Collider: Experimental Review”, Rev. Mod. Phys. 91 (2019), 045003, arXiv:1803.06991. doi:10.1103/RevModPhys.91.045003.
C. F. Anders et al., “Vector boson scattering: Recent experimental and theory developments”, Rev. Phys. 3 (2018) 44-63, arXiv:1801.04203. doi:10.1016/j.revip.2018.11.001.
E. Coleman, M. Freytsis, A. Hinzmann et al., “The importance of calorimetry for highly-boosted jet substructure”, JINST 13 (2017) T01003, arXiv:1709.08705. doi:10.1088/1748-0221/13/01/T01003.
CMS Collaboration, “Measurements of jet charge with dijet events in pp collisions at sqrt(s)=8 TeV”, JHEP 10 (2017) 131, arXiv:1706.05868. doi:10.1007/JHEP10(2017)131.
CMS Collaboration, “Combination of searches for heavy resonances decaying to WW, WZ, ZZ, WH, and ZH boson pairs in proton–proton collisions at sqrt(s)=8 and 13 TeV”, Phys. Lett. B 774 (2017) 533-558, arXiv:1705.09171. doi:10.1016/j.physletb.2017.09.083.
CMS Collaboration, “Search for massive resonances decaying into WW, WZ, ZZ, qW, and qZ with dijet final states at sqrt(s) = 13 TeV”, Phys. Rev. D 97 (2018) 072006, arXiv:1708.05379. doi:10.1103/PhysRevD.97.072006.
CMS Collaboration, “Search for new physics with dijet angular distributions in proton-proton collisions at sqrt(s)=13 TeV”, JHEP 07 (2017) 013, arXiv:1703.09986. doi:10.1007/JHEP07(2017)013.

Public notes with significant contributions
J. Andersen et al., “Les Houches 2023: Physics at TeV Colliders: Standard Model Working Group Report”, in Physics of the TeV Scale and Beyond the Standard Model: Intensifying the Quest for New Physics. 2024. arXiv:2406.00708
CMS Collaboration, “Calibration of the Jet Mass Scale using boosted W bosons and top quarks”, Technical Report CMS-DP-2023-044, 2023.
Andreas Hinzmann on behalf of the ATLAS, CMS, LHCb collaborations Collaboration, “Searches for Exotica”, PoS EPS-HEP2021 (2022) 035. doi:10.22323/1.398.0035.
F. Maltoni et al., “TF07 Snowmass Report: Theory of Collider Phenomena”, arXiv:2210.02591, 2022.
CMS Collaboration, “Pileup-per-particle identification: optimisation for Run 2 Legacy and beyond”, Technical Report CMS-DP-2021-001, 2021.
CMS Collaboration, “Pixel Charge Profiles in Run-2 Data and Simulation”, Technical Report CMS-DP-2020-026, 2020.
CMS Collaboration, “Phase-I Pixel ROC Thresholds and DC-DC Converter Characterization in 2018”, Technical Report CMS-DP-2020-005, 2020.
CMS Collaboration, “Identification of highly Lorentz-boosted heavy particles using graph neural networks and new mass decorrelation techniques”, Technical Report CMS-DP-2020-002, 2020.
CMS Collaboration, “Tracker Performance in 2017 Legacy processing”, Technical Report CMS-DP-2019-027, 2019.
CMS Collaboration, “The Phase-2 Upgrade of the CMS Endcap Calorimeter”, Technical Report CERN-LHCC-2017-023. CMS-TDR-019, 2017.
CMS Collaboration, “The Phase-2 Upgrade of the CMS Tracker”, Technical Report CERN-LHCC-2017-009. CMS-TDR-014, 2017.
CMS Collaboration, “Jet algorithms performance in 13 TeV data”, Technical Report CMS-PAS-JME-16-003, 2017.

Theses
J. Muecke, “Jet performance of CMS to measure dijet angular distributions in LHC Run3”, (2024). Bachelor thesis.
S. Albrecht, “Measurement of jet mass distributions of hadronic W bosons”, (2023). PhD thesis.
R. Schmelcher, “Search for multiple boosted resonances with the CMS experiment and feature selection with distance correlation”, (2023). Bachelor thesis.
E. Wendrich, “Combination of diboson resonance searches with CMS Run2 data”, (2023). Master thesis.
I. Zoi, “Search for diboson resonances in the all jets final state with CMS at sqrt(s) = 13 TeV and pixel sensors development for HL-LHC”, (2021). PhD thesis.
A. Benecke, “Searches for new heavy bosons and vector-like quarks with the CMS experiment at sqrt(s) = 13TeV and novel pileup mitigation techniques”, (2020). PhD thesis.
J. Zeyn, “Jet substructure modelling in dijet and Z+jet events”, (2020). Master thesis.
J. Loemker, “Search for anomalous gauge couplings in vector boson scattering”, (2020). Bachelor thesis.
S. Albrecht, “Search for new physics in vector boson scattering with the CMS experiment in the all-jets final state”, (2018). Master thesis.
D. Leppla-Weber, “Search for excited quark states decaying to qW/qZ with the CMS experiment”, (2019). Bachelor thesis.
H. Shaker, “Measurement of dijet angular distribution with CMS”, (2019). Bachelor thesis.
M. Czimmeck, “Suche nach einer Z’ Resonanz mit dem CMS Experiment”, (2019). Bachelor thesis.

Professional employment and academic education

2023-now DESY Staff Scientist

2017-2023 Emmy-Noether Research Group leader at University of Hamburg (UHH)

2013-2017 Postdoctoral Assistant at University of Zurich (UZH)
2011-2013 CERN Research Fellow
2008-2011 PhD in Physics at RWTH Aachen University
2002-2008 Diplom in Physics