Georgia Karagiorgi

Assistant Professor

Department of Physics

Columbia University

/Research/

Current Research

Georgia Karagiorgi is a leading member of the Neutrino Group at Columbia University, based at Nevis Laboratories. She is involved in neutrino phenomenology and searches for new physics through short- and long-baseline liquid argon neutrino experiments. Those include MicroBooNE and SBND, which are part of the Fermilab Short Baseline Neutrino Program, and the long-baseline neutrino experiment DUNE. Through those projects, she is also involved in liquid argon time projection chamber (LArTPC) detector development and construction.

Research Publications


MicroBooNE

The MicroBooNE detector is a 170 ton LArTPC currently collecting neutrino data in the Booster Neutrino Beamline (BNB) at Fermilab. During its ongoing three-year run, MicroBooNE will record and analyze hundreds of thousands of neutrino interactions on argon.

One of the very first images of neutrino interations recorded by the MicroBooNE TPC!

MicroBooNE's goal is two-fold: (1) to provide an R&D base for next-generation neutrino experiments such as DUNE, which share the same LArTPC detector technology; and (2) to further investigate the MiniBooNE oscillation search results, which revealed an unexpected low-energy excess of electron neutrino-like events...

The MicroBooNE TPC was inserted in the detector cryostat on December 20, 2013. Photo credit: FNAL VMS.

MicroBooNE will investigate the source of the low-energy events previously observed by the MiniBooNE experiment, by exploiting the unique electron-photon discrimination power offered by its LArTPC technology. Additionally, MicroBooNE will be able to measure neutrino interaction cross sections on argon with unprecedented precision. The physics of these interactions is an important element of future neutrino experiments that will employ the LArTPC technology, such as DUNE.

On MicroBooNE, Georgia Karagiorgi has led the commissioning of the experiment's readout electronics, which have been developed, produced, and tested at Nevis Laboratories, Columbia University. She is also supervizing students and postdocs on physics analyses including investigations of the MiniBooNE low energy excess, sterile neutrino oscillation searches, and measurements of backgrounds to future searches for baryon number violating processes, such as neutron-antineutron oscillation.

MicroBooNE News!

Recent MicroBooNE Talks and Posters


SBND

The Short-Baseline Near Detector (SBND) is a 112 ton (active volume) LArTPC, currently under construction. It will be situated in the same beamline as MicroBooNE, at 110 m from the BNB target. In combination with MicroBooNE and ICARUS (the far detector in the same beamline), SBND will enable important tests of eV mass-scale neutrino oscillations. By providing a high-statistics measurement of the un-oscillated neutrino flux of the BNB, SBND is a critical element in performing searches for neutrino oscillations at SBN, through muon neutrino disappearance and electron neutrino appearance. The large data sample will also allow studies of neutrino-argon interactions in the 1 GeV energy range with unprecedented precision.

SBND will be one of three liquid argon neutrino detectors sitting in the BNB at Fermilab as part of the Short-Baseline Neutrino (SBN) Program. MicroBooNE and ICARUS are the intermediate and far detectors in the program, respectively.


DUNE

The long-baseline Deep Underground Neutrino Experiment (DUNE) is a planned dual-site neutrino experiment projected to be in operation in 2026. This experiment will study high-energy neutrinos from a new, high-intensity neutrino beam (LBNF) generated by a megawatt-class proton accelerator at Fermilab, after propagating over a distance of 1,300 km to a far detector located deep underground at the Sanford Underground Research Facility in Lead, South Dakota. The far detector is a 40 kton LArTPC, and it will be the largest LArTPC to have ever been constructed.

DUNE at LBNF is a next-generation neutrino experiment planning to build a very large scale LArTPC to provide unprecedented sensitivity to leptonic CP violation and the neutrino mass hierarchy. The detector will be located deep underground in a mine in South Dakota, at a baseline of 1,300 km from neutrino beam production at Fermilab. DUNE proposes an immense scientific program and will answer many of the great questions of neutrino physics.

DUNE's 1,300 km baseline delivers optimal sensitivity to neutrino charge-parity (CP) symmetry violation and neutrino mass ordering, via neutrino oscillation measurements. The combination of a massive fine-grained detector and underground detector placement also allows DUNE to study low-background physics, such as proton decay and neutrinos from supernova core collapse.

The DUNE physics program will address three of the top questions in particle physics: (1) What caused the preponderance of matter over antimatter in the early Universe? (2) What is the dynamics of supernova bursts that produced the heavy elements necessary for life? and (3) Do protons eventually decay?

SymmetryMagazine article: The Dawn of DUNE