In the near future, we expect that next-generation neutrino telescopes will provide us with the sensitivity required to discover the first sources of UHE neutrino point sources (> 100 PeV). In a recent paper, led by postdoc Damiano Fiorillo, we provided detailed forecasts for what the radio array of IceCube-Gen2 could achieve by looking for neutrino multiplets:

Read more at:

Near-future discovery of point sources of ultra-high-energy neutrinos
Damiano F.G. Fiorillo, Mauricio Bustamante, Victor B. Valera
arXiv:2205.15985

Recently, we put out a paper, led by PhD student Victor Valera, where we present the first complete forecasts of how well the planned radio array of IceCube-Gen2 will be able to measure the UHE (> 100 PeV) neutrino-nucleon cross section. The results are encouraging!

Read more at:

The ultra-high-energy neutrino-nucleon cross section: measurement forecasts for an era of cosmic EeV-neutrino discovery
Victor Branco Valera, Mauricio Bustamante, Christian Glaser
arXiv:2204.04237

Join us in the 2022 edition of the NBIA PhD Summer School on Neutrinos: Here, There & Everywhere. This time it will be mainly an in-person event!

nbia.dk/neutrino2022

Where? Niels Bohr Institute, Copenhagen, Denmark

When? July 11-15

For whom? PhD students and advanced MSc students

Participation mode? In person (unless otherwise advisable)

What’s the damage? No participation fee

Questions? E-mail the local organizers (addresses on the school page)

Registration deadline: March 31 (register early; limited capacity)

Our week-long online NBI Neutrino Summer School “Here, There & Everwhere” wrapped up today!

Find the slides for all talks and hands-on exercises on Indico.

The video recordings of all of the lectures and topical seminars are in our YouTube channel.

Thanks to our guest lecturers Joachim Kopp, Olga Mena, and Foeteini Oikonomou, to our topical seminar speakers from NBI Jason Koskinen, Tom Stuttard, Tyler Corbett, Oleg Ruchayskiy, Shashank Shalgar, and Rasmus Hansen, and to our eighteen student speakers from around the world.

Here is a link to the video of my survey talk in the 1st EuCAPT Symposium (slides here): High-energy and ultra-high-energy cosmic neutrinos

Scientific American wrote an article about the multiple ongoing projects planning to detect ultra-high-energy neutrinos via radio: Searching for the Universe’s Most Energetic Particles, Astronomers Turn on the Radio

(Yours truly makes an appearance.)

Thanks to Katrina Miller for the article!

Recently I gave an online introductory talk about neutrinos in the Thursday Morning Science seminar series of the University of L’Aquila. Here is the recording of that (sorry about the audio problems at the beginning!):

The Niels Bohr International Academy (NBIA) invites PhD students and advanced Master students to the International PhD Summer School on Neutrinos: Here, There & Everywhere. This one-week school aims to bring the participants up to date with the latest developments in neutrino physics, from theoretical issues to experimental results, including astrophysical and cosmological aspects.

Students will be given topical introductions, along with an overview of the current state of the field and the open questions that confront it. The invited lecturers are internationally renowned experts in their fields. The school participants will gain a broad understanding of current theoretical problems in neutrino physics, state-of-the-art neutrino experiments, and applications of neutrinos in cosmology and astrophysics.

School dates: July 5-9, 2021

Registration and information: https://www.nbia.dk/neutrino2021

Registration deadline: March 31, 2021 (please register early)

Format: We are presently planning an in-person meeting, but we want to keep everyone safe, so we may revisit the school format if it becomes necessary or advisable due to travel or health restrictions

Participation fee: None

Questions: Please contact the organizers, Markus Ahlers (markus.ahlers@nbi.ku.dk) and Mauricio Bustamante (mbustamante@nbi.ku.dk)

There is a vast potential in using the measurement of the flavor composition of high-energy (TeV-PeV) astrophysical neutrinos to test astrophysics and fundamental physics. But there is also plenty of uncertainty in the prediction of the allowed flavor composition at Earth, due to the uncertainties in the mixing parameters, and in the measurement of flavor composition in neutrino telescopes. In other words, flavor is a powerful tool, but it needs sharpening.

In our latest paper, we show that in the next 20 years, flavor will become the sharp tool it was always meant to be, thanks to new oscillation experiments and new neutrino telescopes:

The Future of High-Energy Astrophysical Neutrino Flavor Measurements
Ningqiang Song, Shirley Weishi Li, Carlos A. Argüelles, Mauricio Bustamante, Aaron C. Vincent
https://arxiv.org/abs/2012.12893

By 2040, we will be able to use flavor composition by itself to identify the production mechanism of high-energy astrophysical neutrinos:

The big POEMMA paper is finally out! It contains the science case, goals, and design of POEMMA, a twin-satellite experiment to detect the fluorescence and Cherenkov emission from extensive air showers triggered by ultra-high-energy cosmic rays and neutrinos in the atmosphere.

The POEMMA (Probe of Extreme Multi-Messenger Astrophysics) Observatory
A.V. Olinto et al.
https://arxiv.org/abs/2012.07945

My own small contribution was mainly on the opportunities for beyond-the-Standard-Model neutrino opportunities at ultra-high energies.