From Ghosts to Footprints: Listening to the Universe Through Neutrinos
By Nabila Majeed, Kansas State University
Breaking Boundaries — Choosing Physics Against the Current
I grew up in a place where dreams for girls had boundaries. Education was seen as something nice to have, but not necessary — a spare wheel you only reached for in an emergency. Most women I knew followed a path already drawn for them: mandatory education, marriage, family. But I longed for something different. I saw education as the one thing that could make me truly independent, even if it meant breaking the rules that society had quietly written for girls. Fortunately, my mother shared that belief. With her steady courage and quiet defiance, she stood by me as I stepped beyond those boundaries.
When I chose to study physics, I wasn’t just following curiosity; I was challenging an entire mindset. As the first woman in my family to continue studies beyond college or high school graduation, I faced isolation, doubt, and constant reminders of how “unusual” my choices were. Physics itself was demanding — precise, relentless, humbling — yet it became my refuge. During my master’s, I spent hours in seminars ranging from quantum mechanics to astrophysics, searching for that one moment when something would ignite within me and I would feel,
“this is where I belong.”
That moment of belonging finally came one afternoon during a seminar when I first heard the word neutrino. The professor called them the “ghost particles” of the universe — so shy that they can travel millions of miles through matter — through galaxies, stars, and even the human body — every second, without leaving a single trace. Invisible, almost weightless, yet carrying the key to one of the greatest mysteries of existence: why do we see matter around us but not antimatter?
Then came the line — the one that changed the course of my life.
“Listen to the universe through neutrino’s ”
It felt poetic and profound, as if science itself had found a heartbeat. What if the universe truly speaks — not through light, but through these silent messengers? In that instant, I knew I wanted to spend my life listening to those whispers. That day, curiosity became my purpose. But back home, there were no neutrino research groups, no experiments, no laboratories chasing these elusive particles. If I wanted to follow that calling, I would have to leave everything familiar behind.
Crossing Continents — Chasing A Dream
What followed was a test of patience and persistence. The idea of a young woman moving abroad for physics was almost unthinkable in my community. Every step toward that dream felt like walking against a storm — financial struggles, cultural pushback, and years of waiting. Yet the thought of giving up felt heavier than any obstacle.
I applied to neutrino programs, studied relentlessly, saved whatever I could, and kept faith in the vision that had sparked that day in the seminar. Six years passed — filled with rejections, setbacks, and nights of doubt — before the impossible finally happened. An acceptance letter from Kansas State University arrived, and with it, the door I had been pushing open inch by inch finally gave way.
Crossing that threshold didn’t just mark the start of my Ph.D.; it marked the moment my dream became real. Today, as the first woman in my family to pursue a Ph.D. in Physics, studying the most elusive particles in the cosmos, I see my journey not only as a scientific pursuit but as an act of defiance and faith — a promise to keep listening to the quiet voices the world too often overlooks.
That journey eventually brought me to Fermilab, where I now work on the MicroBooNE detector, one of the most advanced machines ever built to study neutrinos. Imagine a vast tank filled with liquid argon, cooled almost to absolute zero. When a neutrino passes through and happens to collide with an argon atom, it leaves behind a faint trail of charged particles — like a tiny spark frozen in time.
These trails are recorded by sensitive cameras and computers, allowing us to see what would otherwise be completely invisible. Each image is a clue; a piece of the puzzle that helps us understand how neutrinos interact with matter. In my research, I study two of the main ways neutrinos can interact with atoms. Sometimes the encounter is gentle, shaking the nucleus like a plucked guitar string — this is called the resonant process. Other times, the collision is so forceful that it breaks the atom apart entirely, known as deep inelastic scattering. Both create showers of particles that look deceptively similar, and my challenge is to tell them apart. It’s like trying to identify two different instruments playing the same note.
Each time I see a faint neutrino track appear on the screen — a delicate, glowing thread suspended in the dark — I’m reminded of where that silence began.
Building the Future — From Fermilab to the World
The work we do at MicroBooNE at Fermilab is a small but vital piece of a much larger scientific puzzle. Our findings help refine the techniques that will be used in the upcoming Deep Underground Neutrino Experiment (DUNE), a massive international collaboration of hundreds of scientists and engineers from around the world, all working to answer some of the deepest questions in physics:
What is the origin of the universe?
Why does anything exist at all?
Why does the universe contain more matter than antimatter?
There are so many “whys” still waiting for answers. Our research helps prepare for that mission by improving how we identify the faint signatures left by different types of neutrino interactions — almost like fine-tuning the ears of a cosmic listening device before the grand symphony of the universe begins.
Echoes Beyond Physics — Serving Humanity
But research like this reaches far beyond physics. Studying neutrinos isn’t just about looking back to the beginning of the universe — it’s also about shaping the future. History shows that curiosity about invisible things can transform the world. When the electron was discovered in 1897, it seemed like a useless curiosity — a speck too small to matter. Yet today, everything from computers to MRI scanners and electric cars depends on that discovery.
The same may one day be true for neutrinos. The technology we build to detect them — ultra-cold sensors, high-speed cameras, and advanced algorithms — is already finding uses in medicine, clean energy, and artificial intelligence. So, while my research begins with questions about the cosmos, its answers may one day touch lives far beyond the laboratory, helping us understand not just the universe around us, but also the one we’re building here on Earth.
But the story of neutrinos is not just a story of science — it’s a story of perseverance and purpose. Each time I see that faint neutrino track, I’m reminded that discovery is not only about finding what lies out there — it’s also about uncovering what lies within ourselves: courage, curiosity, and the will to keep listening even when the world tells us to be silent.
Because in the end, that’s what both science and life are about — listening for the faintest signals, believing they mean something, and following them until they lead us to understanding.
Acknowledgements: This essay was written for the Science Policy & Advocacy for Research Competition (SPARC) at the Universities Research Association.
