Karl Ecklund
· Professor, Physics and AstronomyRice University · Physics
Active 1989–2025
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About
Professor Karl Ecklund is associated with the T.W. Bonner Nuclear Laboratory at Rice University, where research addresses fundamental questions in nuclear and particle physics. The laboratory's work contributes to understanding the universe's composition and the underlying principles of nature, including exploring potential new symmetries, physical laws, extra dimensions, and the unification of forces. The research also investigates the nature of dark matter, antimatter, and the origins and evolution of visible matter, aiming to uncover the fundamental interactions that structure matter and the phenomena that emerge from subatomic organization. Through these efforts, Professor Ecklund's work aligns with the broader scientific pursuit of expanding our knowledge of the universe's fundamental constituents and the laws governing them.
Research topics
- Physics
- Nuclear physics
- Particle physics
- Computer Science
- Astrophysics
- Quantum mechanics
- Optics
- Artificial Intelligence
- Engineering
- Algorithm
Selected publications
Extraction and validation of a new set of CMS pythia8 tunes from underlying-event measurements
The European Physical Journal C · 2020 · 407 citations
New sets of CMS underlying-event parameters ("tunes") are presented for the pythia8 event generator. These tunes use the NNPDF3.1 parton distribution functions (PDFs) at leading (LO), next-to-leading (NLO), or next-to-next-to-leading (NNLO) orders in perturbative quantum chromodynamics, and the strong coupling evolution at LO or NLO. Measurements of charged-particle multiplicity and transverse momentum densities at various hadron collision energies are fit simultaneously to determine the paramet…
A portrait of the Higgs boson by the CMS experiment ten years after the discovery
Nature · 2022 · 320 citations
In July 2012, the ATLAS and CMS collaborations at the CERN Large Hadron Collider announced the observation of a Higgs boson at a mass of around 125 gigaelectronvolts. Ten years later, and with the data corresponding to the production of a 30-times larger number of Higgs bosons, we have learnt much more about the properties of the Higgs boson. The CMS experiment has observed the Higgs boson in numerous fermionic and bosonic decay channels, established its spin-parity quantum numbers, determined i…
The European Physical Journal C · 2021 · 293 citations
in 2015 and 2016, with a relative precision of 1.6 and 1.2%, respectively. These are among the most precise luminosity measurements at bunched-beam hadron colliders.
A measurement of the Higgs boson mass in the diphoton decay channel
Physics Letters B · 2020 · 165 citations
A measurement of the mass of the Higgs boson in the diphoton decay channel is presented. This analysis is based on 35.9 fb -1 of proton-proton collision data collected during the 2016 LHC running period, with the CMS detector at a centre-of-mass energy of 13 TeV. A refined detector calibration and new analysis techniques have been used to improve the precision of this measurement. The Higgs boson mass is measured to be m H = 125.78 0.26 GeV. This is combined with a measurement of m H already per…
Physical Review Letters · 2024 · 96 citations
A search is reported for near-threshold structures in the J/ψJ/ψ invariant mass spectrum produced in proton-proton collisions at sqrt[s]=13 TeV from data collected by the CMS experiment, corresponding to an integrated luminosity of 135 fb^{-1}. Three structures are found, and a model with quantum interference among these structures provides a good description of the data. A new structure is observed with a local significance above 5 standard deviations at a mass of 6638_{-38}^{+43}(stat)_{-31}^{…
Frequent coauthors
- 5033 shared
M. Titov
Institut de Recherche sur les Lois Fondamentales de l'Univers
- 5025 shared
G. Hamel de Monchenault
Université Paris-Saclay
- 4898 shared
M. Lethuillier
Institute of Nuclear Physics of Lyon
- 4658 shared
A. Rosowsky
Institut de Recherche sur les Lois Fondamentales de l'Univers
- 4417 shared
S. Perriès
Institute of Nuclear Physics of Lyon
- 4335 shared
J. Andreä
Institut Pluridisciplinaire Hubert Curien
- 4318 shared
F. Beaudette
Laboratoire Leprince-Ringuet
- 4278 shared
D. Blöch
Institut Pluridisciplinaire Hubert Curien
Education
- 1996
PhD, Physics
Stanford University
- 1989
AB, Physics
Princeton University
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