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Marcus Hohlmann

Professor | College of Engineering and Science - Aerospace, Physics and Space Sciences

Contact Information

Personal Overview

Dr. Hohlmann researches elementary particles and their interactions at the highest energies that can be achieved in the laboratory. His work centers on the study of high energy particle collisions at large accelerators and the construction of instrumentation, i.e. particle detectors, needed to carry out those studies. Currently he pursues this research with the CMS experiment at the Large Hadron Collider at CERN in Geneva, Switzerland, that discovered the Higgs boson in 2012. In the past, he worked at the Tevatron collider of the Fermi National Accelerator Lab (Fermilab), where he contributed to the discovery and study of the sixth and heaviest quark, the top quark, and at the HERA accelerator at DESY, where he helped to build a large tracking detector for the HERA-B experiment designed to study CP violation with bottom quarks.

With his students, Dr. Hohlmann builds and operates advanced gaseous particle detectors, such as GEM detectors for the CMS experiment at CERN and micro-RWELL detectors for ePIC, a future nuclear physics experiments at the Electron-Ion Collider to be constructed in the U.S. by 2030. In the past, his students constructed and operated Fl. Tech's only Grid Computing Cluster, which was an official Tier-3 computing site on the Open Science Grid.

Dr. Hohlmann serves as P.I. and CERN team leader for the Florida Tech HEP group and as Florida Tech's representative on the Institution Board of the CMS Muon Detector Group.

He is a charter member of the RD51 collaboration at CERN, which is dedicated to developing Micro-Pattern Gaseous Detectors (MPGDs) for particle detection. He is Florida Tech's RD51 team leader and serves on the RD51 collaboration board.

He also advises the Badminton Club and used to play with the P/SS Program's Intramural Softball Team - the "InfraRed Sox".

Educational Background

Ph.D., University of Chicago, 1997.
Dipl. Phys., RWTH Aachen, Germany, 1991.
M.S., Purdue University, 1989.

Professional Experience

Professor, Florida Inst. of Tech., 2015-present.

Associate Prof., Florida Inst. of Tech., 2007-2015.

Assistant Prof., Florida Inst. of Tech., 2002-2007.

Postdoctoral Research Fellow, HERA-B Experiment, Deutsches Elektronensynchrotron (DESY), Hamburg, Germany, 1997-2001.

Graduate Research Assistant, CDF group, Univ. of Chicago, 1994-1997.

Graduate Student Research Associate, CDF Experiment, HEP Division, Argonne National Laboratory (ANL), Argonne, IL, 1991-1994.

Current Courses

  • PHY 5088 Graduate Laboratory
  • PHY 5045 Introduction to Elementary Particle Phys. (Grad.)
  • PHY 5030 & 5031 Quantum Mechanics I & II (Grad.)
  • PHY 4071 Senior Laboratory
  • PHY 4030 Introduction to Subatomic Physics
  • PHY 4021 Optics Laboratory
  • PHY 3901 Research Experience in Physics
  • PHY 3440 Electromagnetic Theory
  • PHY 2002 Physics 2
  • PHY 1001 Physics 1

Selected Publications

Full publication list (INSPIRE HEP database)

Publications at Florida Tech (HEP site)

Publications on major discoveries in particle physics

  • Higgs Discovery at CERN (2012): 

S. Chatrchyan, et al. (CMS Coll.), Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC, Physics Letters B 716 (1), 30-61.  (12,871 cit.).

  • Top Quark Discovery at Fermilab (1995):

F Abe, et al. (CDF Coll.), Observation of Top Quark Production in Collisions with the Collider Detector at Fermilab, Physical Review Letters 74 (14), 2626 (1995) (4531 cit.).

F Abe, et al. (CDF Coll.), Evidence for top quark production in p-bar p collisions at √s =1.8 TeV, Physical Review D 50 (5), 2966 (1994) (1845 cit.).

Recent and Selected Other Publications:

M. Abbas with S. Butalla (corr. auth.) and M. Hohlmann,  et al., Quality Control of Mass-Produced GEM Detectors for the CMS GE1/1 Muon Upgrade, Nucl. Inst. Meth. A Vol. 1034, pages July 1, 2022.

S. Butalla and M. Hohlmann (for the CMS muon group), Electronics integration for the GE2/1 and ME0 GEM detector systems for the CMS Phase-2 Muon System Upgrade, JINST, Proc. of  Topical Workshop on Electronics for Particle Physics (TWEPP2021), Sept 20-24, 2021, JINST 17 C05002.

R. Abdul Khalek et al., with J. Collins, M. Hohlmann, A. Wikramanayake, Science Requirements and Detector Concepts for the Electron-Ion Collider (EIC Yellow Report), BNL-220990-2021-FORE, JLAB-PHY-21-3198.

T. Elkafrawy, M. Hohlmann, et al., Illuminating long-lived dark vector bosons via exotic Higgs decays at √s = 13 TeV, PoS (LHCP2021) 224, June 7-12, 2021.

S. Colafranceschi, M. Hohlmann with D. Abbaneo et al., Operational experience with the GEM detector assembly lines for the CMS forward muon upgrade, Proc. of IEEE Nucl. Sci. Symp. 2017, Altanta, GA, Trans. Nucl. Sci. Vol. 65, No. 11 (2018).

V. Bhopatkar, M. Hohlmann, et al. with CMS Coll., Measurement of the Z/γ*  -> τ τ cross section in pp collisions at √s = 13 TeV and validation of τ lepton analysis techniques, Eur. Phys. J. C (2018) 78:708.

A. Zhang, M. Hohlmann, B. Azmoun, M. Purschke, and C. Woody, A GEM readout with radial zigzag strips and linear charge-sharing responseNucl. Inst. Meth. A 887 (2018) 184-192.

T. Hebbeker, et al. (M. Hohlmann chapter editor), CMS Technical Design Report for the Phase-2 Upgrade of the CMS Muon Detectors, CERN-LHCC-2017-012, CMS-TDR-016, Sept. 12, 2017.

V. Bhopatkar, M. Hohlmann, A. Mohapatra, M. Phipps, J. Twigger, A. Zhang, et. al., Performance of a Large-Area GEM Detector Prototype for the Upgrade of the CMS Muon Endcap System, Proc. of IEEE Nucl. Sci. Symp. 2014, Seattle, WA, Nov 9-15, 2014, arXiv:1412.0228. 

Hohlmann M. with K. Gnanvo, et al., Detection and Imaging of High-Z Materials with a Muon Tomography Station Using GEM Detectors,  Proc. of IEEE Nucl. Sci. Symp. 2010, Knoxville, TN, 2010.

Hohlmann, M. with the CMS Coll., The CMS Experiment at the CERN LHC, J. Inst. 3, S08004, 2008.

Hohlmann, M., C. Padilla, N. Tesch and M. Titov (editors), Proc. of International Workshop on Aging Phenomena in Gaseous Detectors, Nucl. Instr. and Meth. A515 (2003).

Hohlmann, M., A large ultra-clean gas system with closed loop for the high-rate Outer Tracker at HERA-B, Nucl. Instr. and Meth. A515 (2003) 132.

Hohlmann, M. with H. Albrecht, et al., Aging Studies for the large honeycomb drift tube system of the Outer Tracker of HERA-B, Nucl. Instr. and Meth. A515 (2003) 155.

Hohlmann, M. with T. Affolder, et al. (CDF Coll.), Search for the Charged Higgs Boson in the Decays of Top Quark Pairs in the eτ and μτ Channels at √s = 1.8 TeV, Phys. Rev. D 62, 2000.

Hohlmann, M., with F. Abe, et al. (CDF Coll.), The μτ and eτ decays of top quark pairs produced in p anti-p collisions at √s = 1.8 TeV, Phys.Rev.Lett.79, 1997.

Recognition & Awards

  • Mentor of Northrop-Grumman Science Championship Teams and President's Cup Winners at the NG Engineering & Science Showcase in 2024, 2019, 2014 & 2011
  • Excellence in Research Award, awarded by FIT Faculty Senate in 2010/11
  • Fulbright Fellow, 1988-89


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