18 September 2024

Photo: Sara Bianco

Sara Bianco comes from Gallipolli, Italy. She completed her Master's degree in Bologna in autumn 2023 with a thesis on searches for light dark matter models in neutrino experiments, in particular at ProtoDUNE. As a Quantum Universe PhD student, she is currently working in the DESY Dark Matter Group 1, researching Big Bang Nucleosynthesis under the supervision of Dr. Kai Schmidt-Hoberg.

What is the topic of your research?

My current research focuses on using Big Bang Nucleosynthesis (BBN) to constrain new physics models. BBN describes the formation of light elements such as deuterium, tritium and helium-4 in the early universe. By comparing the primordial abundances of these elements, which we can infer from astrophysical observations, with the predictions of the Standard Model, we can test theories beyond the Standard Model. Right now, we are investigating how the injection of additional neutrinos during the BBN affects these predictions. This is particularly relevant as some new physics models, such as those explaining neutrino masses, predict the existence of extra particles that could decay into neutrinos. If such decays occur during the BBN period, we can potentially set competitive limits on these new particles, comparable to constraints from other experiments.

What fascinates you about your research focus?

What interests me most about my research is that BBN provides one of the earliest windows into the early universe, giving us a glimpse of what the universe was like about a second after the Big Bang. The ability to infer primordial abundances from astrophysical observations is something I find incredibly fascinating. My work involves linking these observations to theoretical predictions from BBN, which allows me to explore new physics models and address open questions such as dark matter and neutrino masses. Working at the intersection of theory and observation is really motivating and I feel like I am learning a lot every day.

What do you like about the cluster Quantum Universe?

I regularly attend Quantum Universe Days and I really enjoyed last year's QURS Days, which are among many great opportunities the cluster of excellence provides. These occasions are perfect for connecting with others in the cluster and spending quality time together. I think it is very important to get to know other PhDs from the cluster, also working on different things than mine. It helps to create a stimulating environment, and it is a great chance to get out of my own research bubble.

What do you like to do in your free time?

I enjoy climbing, running, and hiking, though the last one is a bit challenging without mountains nearby. Apart from that I like going out with friends.