ABOUT FREYA BLEKMAN

Prof. Freya Blekman: a life in the search for what lies beyond the Standard Model

Few careers in modern experimental physics illustrate as clearly how particle physics has changed over the past three decades as that of Prof. Freya Blekman. Her professional life has taken her from the University of Amsterdam and the Dutch particle-physics institute Nikhef, through the Tevatron at Fermilab and the early construction of the CMS experiment at CERN, to professorships in Brussels and Hamburg. Along the way, she has worked on one of the most massive elementary particles known—the top quark—while also becoming an unusually visible advocate for communicating particle physics beyond the laboratory.

Today, Blekman is a professor of experimental physics at the University of Hamburg and a Lead Scientist at DESY, where she works within the CMS programme at the Large Hadron Collider (LHC). Her scientific focus is the search for phenomena that cannot be explained by the Standard Model of particle physics, particularly through precision measurements and direct searches involving the top quark. She also works on the proposed Future Circular Collider programme. qu.uni-hamburg.de+1 

But the scientific story is only half of Blekman's biography. A recurring theme in her career has been the conviction that doing physics and explaining physics are not separate activities. She has occupied leadership positions within the enormous international CMS collaboration, helped establish its physics-communication programme, trained younger researchers in communicating their work, and built a public presence around particle physics.

In March 2026, that combination of research and communication was recognized when she was elected to the Royal Holland Society of Sciences and Humanities (KHMW), a Dutch learned society founded in 1752. qu.uni-hamburg.de+1 

From Amsterdam to the particle-physics frontier

Blekman's academic story begins in the Netherlands. According to the University of Hamburg and DESY biographies, she studied physics at the University of Amsterdam, completing her master's degree in 2000. Her connection with Nikhef, the Dutch national institute for subatomic physics, became an important part of her early scientific career. qu.uni-hamburg.de+1 

There is an interesting detail in her biography that predates her professional research career: Blekman was already involved in science communication as an undergraduate. The International Particle Physics Outreach Group (IPPOG) records that she participated in the University of Amsterdam's science-fair activities, including events associated with CERN's 40th anniversary in 1994. In other words, explaining physics to non-specialists was not something she discovered only after becoming a professor; it was present unusually early in her career. IPPOG 

Her master's work was connected with research and development for the LHCb experiment. She then moved into doctoral research on the top quark, working primarily with the D0 experiment at Fermilab in the United States. Her 2005 doctoral thesis, Top Quark Pair Production in Proton Antiproton Collisions, is listed in the Fermilab thesis archive. LSS FNAL+1 

The choice of subject was scientifically significant. The top quark is the heaviest known elementary quark and has an unusually large mass compared with the other fundamental fermions. Because of that mass, measurements involving top quarks provide a particularly sensitive laboratory for testing the Standard Model and looking for deviations that could point toward new physics.

Blekman's doctoral work therefore placed her directly in one of the central experimental questions of particle physics: is the Standard Model the complete description of nature, or is it an extraordinarily successful approximation to something deeper?

Joining CMS—and learning to build an experiment

After completing her PhD, Blekman joined the CMS experiment at CERN. Her postdoctoral career took her first to Imperial College London, from 2005 to 2007, and then to Cornell University, from 2007 to 2010. qu.uni-hamburg.de+1 

This was a particularly interesting moment in particle physics. The LHC was being built, and the enormous CMS detector was moving from a collection of components and subsystems toward an operating scientific instrument.

Blekman worked on aspects of the construction and commissioning of CMS. Her later roles included work involving the detector's pixel tracking system and software. The LHC was not simply a machine that physicists could switch on and immediately use: thousands of researchers had to understand how its detectors behaved, how particles were reconstructed from their signals, and how the resulting data could be turned into measurements.

That experience—working simultaneously with detector technology, software, large datasets and physics analysis—became characteristic of Blekman's career.

IPPOG describes her as having worked on the construction and startup of CMS and as having pursued top-quark physics for more than two decades. IPPOG 

The top quark as a window on new physics

To understand Blekman's research, it helps to understand why the top quark matters.

The Standard Model describes the known elementary particles and three of the fundamental forces with extraordinary accuracy. Yet physicists know that it does not answer every major question. It does not, for example, provide a complete explanation of dark matter, and it does not incorporate gravity in the same framework.

One strategy for finding evidence of physics beyond the Standard Model is to look for new particles directly. Another is subtler: make increasingly precise measurements of known particles and ask whether their behaviour matches theoretical predictions.

The top quark is valuable in both approaches.

Blekman's research has concentrated on using top-quark processes to look for new phenomena. DESY describes her work as combining precision measurements with direct searches, particularly in the top-quark sector. She has also worked on searches for new particles that decay into top quarks. Desy 

This programme has included studies of top-quark production, searches for supersymmetry and other hypothetical phenomena, and investigations of processes involving multiple top quarks.

Her own research record illustrates how collaborative modern particle physics has become. Among the publications highlighted on her personal academic website are work on four-top-quark production, b-quark identification, single-top-plus-W production, top-quark pair production, supersymmetry searches and the commissioning of the CMS pixel detector. Freya Blekman 

These are not experiments performed by a handful of people around a laboratory bench. CMS is an international collaboration involving thousands of physicists, engineers and technicians. Consequently, attributing a particular result to one person requires care. Blekman's contribution has often been through leadership of analysis groups, detector and software work, coordination and supervision, as well as direct scientific contributions.

From postdoc to professor in Brussels

In 2010, Blekman began her academic career as an assistant professor at the Vrije Universiteit Brussel (VUB). She became an associate professor in 2014 and a full professor in 2018, remaining in Brussels until moving to Germany. qu.uni-hamburg.de+1 

The Brussels years were important for another reason: they allowed Blekman to build a research group and take increasingly prominent roles within CMS.

One of those roles was the creation of the Beyond-Two-Generations (B2G) physics group. The group focused on searches for new particles using heavy quarks and the W, Z and Higgs bosons. DESY identifies B2G as one of the major international groups Blekman helped establish and lead. Desy 

She also became involved in the organisation of future collider studies, including work connected with the proposed Future Circular Collider electron-positron programme (FCC-ee).

The broader scientific question remained the same: if the Standard Model is incomplete, where might the evidence first appear?

The answer may not necessarily be a spectacular new particle appearing as an obvious bump in a graph. It could instead be a small discrepancy in a precision measurement, an unusual decay pattern, or an unexpected correlation among particles produced in a collision.

That is why Blekman's research encompasses both direct searches and precision measurements.

The communication problem inside Big Science

Blekman's career also reflects a problem that has become increasingly important in modern science.

Particle physics has become a spectacularly international enterprise, but its experiments have also become extraordinarily complicated. A detector such as CMS contains enormous numbers of individual components. Its data are analysed by researchers distributed across universities and research institutes around the world.

Explaining the resulting science is therefore not merely a matter of translating jargon into simpler words. Someone has to explain why a measurement matters, what the experiment actually measured, what its uncertainties are, and what scientists can—and cannot—conclude from it.

Blekman became deeply involved in that task.

In 2018 she became the first Physics Communications Officer of the CMS collaboration, helping establish and coordinate its physics outreach activities. DESY says she was responsible for communication surrounding the scientific results of one of the world's largest scientific collaborations. Desy+1 

Her interest in communicating science was recognized well before that. In 2016 she received the Jaarprijs Science Communication from the Royal Flemish Academy of Belgium for Science and the Arts for promoting particle physics through social media, particularly Twitter and YouTube. Desy+1 

Her approach has been unusually direct for an academic scientist. Rather than treating communication as something reserved for press officers, she has argued for giving young scientists opportunities to learn the skills themselves.

That philosophy is visible at DESY today, where researchers at different career stages contribute to public-facing communication. A 2026 University of Hamburg account of her election to the KHMW reported that the @cmsatdesyInstagram channel reaches tens of thousands of users each month and is deliberately used as a relatively accessible environment in which doctoral students and postdocs can practise communicating science. qu.uni-hamburg.de 

Hamburg and DESY

In 2021, Blekman moved to Hamburg as part of the Helmholtz Distinguished Professorship programme, becoming a Lead Scientist at DESY and a professor of experimental physics at the University of Hamburg. Desy+1 

The move brought together several strands of her career.

DESY has a major particle-physics programme and a substantial CMS group. Hamburg is also home to the University of Hamburg's Quantum Universe Cluster of Excellence, in which Blekman became a Principal Investigator and later took on responsibility for outreach and transfer.

Her role therefore extends beyond conducting analyses herself. She works at the intersection of research, research leadership, university teaching, collaboration management and public communication.

The University of Hamburg currently lists her as both Outreach and Transfer Director for Quantum Universe and a Principal Investigator. qu.uni-hamburg.de 

Her professional responsibilities within CMS have also continued to expand. Since 2024, the University of Hamburg lists her as Chair of the CMS Awards Committee and Internal Communications Director of the CMS collaboration. She has also served on the collaboration's Diversity Monitoring and Oversight Committee. qu.uni-hamburg.de 

What she is looking for now

The central scientific problem has not changed much since her doctoral years.

The Standard Model works remarkably well. The difficulty is finding the cracks.

Blekman's current research uses the enormous quantity and precision of LHC data to search for such cracks, with top quarks remaining a major focus. Her work encompasses both the CMS experiment and future collider studies. Desy 

This is an important distinction. Searching for "new physics" does not necessarily mean expecting to discover a single new particle next week. Contemporary particle physics is also an exercise in progressively narrowing the possibilities.

Every measurement that agrees with the Standard Model can constrain theories that predict something different. Every measurement that disagrees—even slightly—has to survive increasingly careful checks.

That makes the top quark an unusually useful probe. Its enormous mass, short lifetime and distinctive production and decay mechanisms make it an experimentally rich particle. If unknown physics couples particularly strongly to heavy particles, top-quark measurements may provide a route toward discovering it.

Blekman's research is consequently part of a much larger effort to determine what comes after the Standard Model.

A scientist with two audiences

There is a useful tension running through Blekman's biography.

On one side is the extreme specialization of modern particle physics. Her research papers can involve sophisticated statistical methods, detector reconstruction, quantum field theory and enormous international datasets.

On the other is her determination to explain what those measurements mean to people who are not particle physicists.

Her own website describes her research in terms of fundamental questions: how the universe evolved, what the smallest constituents of matter are, what space and time really are, and the nature of mass. Freya Blekman 

That is perhaps the simplest way of understanding the trajectory of her career.

The young physicist who began working on the top quark at Fermilab eventually became a professor studying whether the top quark can reveal physics beyond the Standard Model. The researcher who learned to work inside one of the world's largest scientific collaborations became one of the people responsible for explaining that collaboration's results. And the undergraduate who was already participating in public science events eventually made science communication a significant part of her professional identity.

Recognition in the Netherlands

The latest chapter came in March 2026, when Blekman was elected to the Royal Holland Society of Sciences and Humanities.

The KHMW was founded in 1752 and has roughly 950 members. According to DESY and the University of Hamburg, Blekman's election recognized both her scientific research—particularly searches for new physics involving top quarks—and her contribution to science communication. qu.uni-hamburg.de+1 

The distinction is revealing because it captures the two halves of her career.

Blekman is not simply a physicist who happens to communicate with the public. Nor is she principally a science communicator who happens to have a research position. Her career has developed around the idea that the two activities can reinforce each other.

She has described encountering scientists in other disciplines who knew surprisingly little about particle physics, and said that this convinced her that physicists needed to do more to reach beyond their own community. qu.uni-hamburg.de 

For her, communication is therefore part of the scientific enterprise rather than merely its publicity department.

The larger significance of her career

Freya Blekman's biography is ultimately a story about how contemporary science is done.

Her generation of particle physicists inherited the Standard Model as an extraordinarily successful theory, but also inherited a long list of unanswered questions. They work with machines whose scale is international, experiments whose data volumes are enormous and collaborations that can contain thousands of people.

The scientific challenge is correspondingly different from the romantic image of the solitary physicist discovering a new law with a piece of chalk.

Modern experimental physics depends on collaboration, instrumentation, computation, statistical analysis, leadership and communication.

Blekman's career has touched all of those elements.

She began with the top quark at Fermilab, moved into the construction and commissioning of CMS, developed a research programme around top-quark physics and searches for new phenomena, became a professor and research-group leader in Brussels, took leadership roles within CMS, and eventually moved to Hamburg as a DESY Lead Scientist and University of Hamburg professor. qu.uni-hamburg.de+1 

As of 2026, she remains active in the search for physics beyond the Standard Model while holding significant responsibilities in CMS communication and scientific leadership. Her publication record is correspondingly extensive: the University of Hamburg research portal lists more than 1,300 publications associated with her academic profile, reflecting the collaborative nature of modern high-energy physics. FIS Hamburg+1 

The numbers, however, only tell part of the story.

The more interesting thread is the question that has followed Blekman throughout her career: what happens when we push our measurements far enough that nature has nowhere left to hide?

For more than twenty years, she has pursued that question through the heaviest quark, enormous particle detectors and increasingly precise measurements. At the same time, she has worked to make the resulting science understandable to people outside the field.

That combination—searching for new physics while making the search itself visible—is what makes Blekman's career distinctive.

And as the LHC continues to accumulate data and future colliders remain under discussion, the next stage of her scientific story is likely to involve the same two ambitions that have defined much of her career: finding evidence of what lies beyond today's physics, and explaining to the rest of us why it matters.

Sources and further reading

• University of Hamburg / Quantum Universe — Prof. Dr. Freya Blekman — current academic biography, career history and institutional roles. qu.uni-hamburg.de 

• DESY — Freya Blekman — research interests, career and awards. Desy 

• Freya Blekman's research website — first-person description of her research and selected publications. Freya Blekman 

• DESY — “Freya Blekman elected to Royal Holland Society of Sciences and Humanities” — 2026 election and discussion of her science communication work. Desy 

• CMS Experiment at CERN — Blekman elected to the Royal Holland Society — CMS perspective on her research and communication career. CMS 

• IPPOG — Freya Blekman / CMS Collaboration — early education, CMS career, outreach and science-communication activities. IPPOG 

• Fermilab thesis archive — record of Blekman's 2005 doctoral thesis on top-quark pair production. LSS FNAL 

• University of Hamburg Research Portal — publication record. FIS Hamburg 

Note: I have deliberately kept this biography to documented information. Public sources give extensive information about Blekman's education and scientific career, but relatively little reliable biographical detail about her childhood, family or private life, so I have not filled those gaps with speculation.