A journey from 10-15 cm to 1030 cm

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Dr. Lu Lu

Neutrino Hunter

Assistant Professor @WIPAC

University of Wisconsin-Madison, United States

Physical Sciences Group Representative @ US Scientific Committee on Antarctic Research (US SCAR)

The origins and acceleration mechanisms of the highest energy particles in the Universe are among the most enduring mysteries of modern physics. Studies of cosmic rays led to the birth of elementary particle physics. Over 100 years later, we use the Earth's atmosphere, Antarctic ice, and ocean water as part of our detectors to solve this century-old puzzle. Does the Standard Model hold at these extreme high energies? Could these particles be decay or annihilation products of dark matter?

During PhD I was at the University of Leeds (United Kingdom) and University of Wuppertal (Germany) to search for ultra-high energy photons using data from the Pierre Auger Observatory. Previously I was a postdoc researcher at Chiba University (Japan) and worked for the IceCube Neutrino Telescope.

I have been a co-convener of the Diffuse/Atmospheric working group in IceCube since 2021 and serving on the realtime oversight committee. My group at WIPAC works on a wide range of topics including realtime multi-messenger, Galactic plane neutrino searches, Diffuse neutrino analysis and in particular searches for >10 PeV neutrinos. In our spare time we make new sensor designs for the future IceCube-Gen2 neutrino telescope. In 2023, I received the International Union of Pure and Applied Physics ( IUPAP ) early career award for advancing high-energy neutrino astronomy in the PeV energy range with IceCube. In 2019, I was honored with the IceCube Impact Award for leading the ICEcuBE AR project, applying spatial computing for science outreach.

Research Interests

Where are the highest energy particles from?
γ

Photons

From X-ray, gamma-ray to UHE photons, they carry key information on the UHE sources. Difficulty: Universe is opaque and there are leptonic sources.

ν

Neutrinos

Neutrinos are weakly interactive and ideal for astronomy. My prime interests are PeV astrophysical neutrinos and EeV cosmogenic neutrinos.

CR

UHECR

A more than 100-year mystery but hard to solve because the charged particles bend in B fields. Mass composition unknown and highly diffused.

Multi-Messenger-Astronomy

The most promising way to find the first UHE sources.

Selected conferences

Publication

Link to inspire

Our Group

Graduate Students

Zoe Rechav

Integrating partially contained cascades into diffuse astrophysical measurements using deep neural networks

Emre Yildizci

Next-generation diffuse neutrino global-fit targeting 10 PeV and beyond

Maxwell Nakos

Applying Graph Neural Networks to southern sky neutrino searches and extending them beyond 100 PeV,

plus exploring transient ultra-high-energy sources with photon candidates detected by the Pierre Auger Observatory

Matthias Thiesmeyer

All-flavour neutrino searches focused on the Galactic plane and Cygnus bubble

Vedant Basu (co-advising)

Characterizing the astrophysical diffuse spectrum using medium energy starting events (MESE)

Undergraduate Students

Ian Crawshaw

Parameterizing particle shower profiles

Leo Seen

Correlating all-flavour neutrinos with >100 TeV photons detected by LHAASO

Siwei Wang

Parameterizing in-ice muon flux

Carter Shulick

Developing analytic parameterizations for photon propagation in transparent mediums

Wil Cram

Building a real-time neutrino alert website and developing augmented reality applications

Karter Bell

Developing hardware electronics for IceCube-Gen2

McCartney Evenson

Monitoring real-time alerts and analyzing neutrino self-correlations

Kieran Hizon

10-100 PeV neutrino reconstructions

High School Students

Physics 107: Ideas of Modern Physics

Link to course
Physics 107

Physics 307: Intermediate Laboratory-Mechanics and Modern Physics

Link to course

Physics 406: Intro to Particle Astrophysics

Link to course
Physics 406

Hobby Projects

Check out a few cool things I designed recently

Downloads

Avalible on Google PlayStore and Apple AppStore


Contact details

email: lu.luAticecube.wisc.edu