The search for dark matter is akin to seeking a phantom in a vast room—it is a formidable challenge that requires both creativity and precision. Prof. Marrodán Undagoitia’s commitment to this avenue of research materialized during her doctoral studies at the Technical University of Munich, where she delved into light emission in organic liquid scintillators and examined the possibility of proton decay. Her deep engagement with these complex topics led her to a postdoctoral fellowship at the University of Zurich, after which she transitioned into a permanent role at the Max Planck Institute, where her influence has steadily grown since.

Her proficiency is especially evident in her leadership role within the XENON collaboration, where she oversees the development and implementation of light sensors for both the XENON1T and XENONnT experiments. These sensors serve a vital role, acting as the eyes that detect faint light signals produced by potential dark matter interactions within the liquid xenon. The meticulous engineering behind these sensors is complemented by collaboration with industrial partners, reflecting a harmonious intersection between academia and industry that enriches scientific inquiry.

In her current position, Prof. Marrodán Undagoitia’s focus has expanded to include an intricate understanding of energy deposition mechanisms in the liquid xenon medium. Her lab is pioneering investigations into the infrared emissions generated by particles within this material, a breakthrough that holds the promise of significantly enhancing the sensitivity of future dark matter detection experiments. Such advancements are crucial as experiments like DARWIN and XLZD are poised to redefine the field of astroparticle physics by achieving unprecedented levels of detection sensitivity.

Her contributions extend beyond experimentation and technical implementation; they are also intertwined with the broader scientific community as she serves on the editorial board of the XENON collaboration. This elected body is responsible for establishing publication strategies, ensuring that vital findings reach the academic community and the public. Additionally, her roles on various scientific advisory boards, including those for the Canfranc underground laboratory in Spain and the CAPA Institute in Zaragoza, underscore her influence and commitment to advancing both research and collaborative networking across international platforms.

The essence of her work and her responsibilities does not stop there. Prof. Marrodán Undagoitia is heavily engaged in educating the next generation of physicists. Her commitment to mentoring students and supervising doctoral candidates reflects her belief in the importance of fostering new talent to carry the torch of inquiry into dark matter and neutrino properties. As she enriches the curricula in her role as a professor by special appointment at the University of Amsterdam, her expertise is expected to bolster the capabilities of the Nikhef Dark Matter group significantly.

Collaboration, especially within the realm of neutrino experiments such as DUNE, provides another avenue through which her skills will enhance scientific efforts. The associated detection and analysis techniques she champions can pave the way for breakthroughs in our grasp of neutrinos and their interactions, further complicating but enriching the already intricate tapestry of particle physics.

Social impact is also an integral part of her scientific mission, as she actively participates in public outreach initiatives. Her experiences allow her to communicate complex topics relating to dark matter and particle interactions to diverse audiences, helping to demystify the work being done in high-energy physics laboratories. This effort not only takes science into the mainstream but also inspires enthusiasm for scientific exploration among students and the general public alike.

In recent years, her leadership and advocacy roles have further amplified her influence. Since her appointment as ombudsperson of the Max Planck Institute, she has facilitated discussions around the work-family balance, addressing critical issues pertinent to scientific professionals. Such roles showcase her commitment to creating a supportive and inclusive environment for researchers at all career stages.

As the scientific community turns its focus toward the future of dark matter research, the contributions of leading figures like Prof. Marrodán Undagoitia will be pivotal. With state-of-the-art technologies and a robust understanding of the intricacies of particle interactions, her contributions will help unravel the mysterious fabric of our universe. Each experiment designed, each light sensor deployed, and every data analysis performed carries with it the potential to extend the boundaries of human knowledge into the uncharted territories of dark matter and beyond.

Prof. Marrodán Undagoitia’s work epitomizes the blend of research excellence and community engagement that is essential in modern science. She stands as a beacon for aspiring scientists, illustrating that perseverance and a commitment to inquiry can lead to groundbreaking discoveries. As she continues her journey alongside other eminent scientists in the field, we can look forward to advancements that will not only push the boundaries of physics but also ignite the imaginations of future generations.

This symbiotic relationship between research and teaching, community involvement, and public outreach forms a compelling narrative that transcends the confines of academia. Prof. Marrodán Undagoitia’s career thus far is a testament to what is possible when one blends scientific passion with social responsibility, ultimately demystifying the wonders of our universe for all to appreciate and understand.

Subject of Research: Astroparticle Physics, Dark Matter Detection
Article Title: Unveiling the Mysteries of the Universe: Prof. Teresa Marrodán Undagoitia’s Quest for Dark Matter
News Publication Date: October 2023
Web References: Not available
References: Not available
Image Credits: T. Marrodán Undagoitia/MPIK

Keywords

Astroparticle Physics, Dark Matter, Neutrinos, Liquid Xenon, XENON Collaboration, Max Planck Institute, High-Energy Physics, Scientific Outreach, Research Leadership.

Dark matter, often described as the universe’s “missing mass,” remains one of modern astrophysics’ greatest enigmas. While visible matter—such as stars, planets, and galaxies—accounts for a mere fraction of the cosmos, the majority of the universe’s mass is thought to be composed of this intangible substance. The challenge in detecting dark matter arises not only from its invisible nature but also from the uncertainty surrounding its characteristics and properties. Researchers have long sought to develop new methodologies and technologies to investigate this mysterious phenomenon.

The research team has capitalized on a novel spectrographic technique that distinguishes between background light and the light emitted from decay events associated with dark matter candidates. Their focus has been on a specific type of particle known as the axionlike particle (ALP), theorized to decay into photons. This decay process may generate faint signals in the infrared spectrum, making it a prime target for investigation. Unfortunately, the infrared portion of the electromagnetic spectrum is notoriously cluttered with noise and interference from various cosmic sources, including zodiacal light and thermal emissions from the Earth’s atmosphere.

To overcome these challenges, the team developed a technique that exploits the characteristic differences between background radiation and light from decay events. While background light encompasses a broad spectrum of wavelengths, the light produced by decay processes tends to be concentrated within a narrow band. This concentration allows researchers to enhance their detection capabilities significantly, letting them filter out the overwhelming noise typically found in the infrared region.

Employing this advanced method, the team utilized WINERED, a state-of-the-art infrared spectrograph specifically designed for such astronomical observations. Its high precision enabled them to meticulously account for every photon detected in the near-infrared spectrum. The absence of any detected decay events was then transformed into a critical metric, setting stringent upper limits on the frequency of ALP decay processes. As a result, the researchers have placed a new lower bound on the lifetime of ALP particles, expressing it as an impressively large number: 10 followed by 25 to 26 additional zeros. This translates to a lifetime approximately a hundred million times greater than that of the universe itself.

This major finding signifies not only the highest constraint on dark matter’s lifetime to date, but also a pivotal intersection between cosmology and particle physics. By leveraging cutting-edge technology in infrared cosmology, the research addresses fundamental questions surrounding the properties and existence of dark matter. The meticulous analysis of spectroscopic data highlights the remarkable potential of these observational techniques in pursuing tangible evidence of dark matter.

The team’s work unravels the complexities of observations previously made regarding the rotation of galaxies, which suggested an abundance of unseen mass. These observations have historically fueled speculation regarding the existence of dark matter, compelling physicists to theorize about its properties and behavior. With this new approach, researchers may be closer than ever to acquiring verifiable evidence, potentially paving the way for groundbreaking discoveries in the field of high-energy physics.

As investigations continue, the researchers have noted intriguing anomalies or “excesses” in their data. Such observations could signify an impending detection of dark matter, further emphasizing the importance of ongoing studies and refinements in their observational techniques. The ongoing analysis promises to refine not just the constraints on dark matter but also theorize about various potential candidates that could fit our current understanding.

The significance of these findings extends beyond just the parameters of dark matter. They illustrate the ongoing evolution of technological innovation within observational astrophysics, showcasing how advancements in spectrographic instrumentation can lead to leaps in our fundamental understanding of the universe. Each new discovery reveals the intricate tapestry of cosmic phenomena, intertwining dark matter research with broader scientific inquiries.

Moreover, the collaboration between institutions, such as the University of Tokyo and the Laboratory of Infrared High-resolution Spectroscopy at Kyoto Sangyo University, underscores the spirit of collective scientific endeavor. Such partnerships allow for the integration of resources, knowledge, and expertise, propelling forward the quest for answers hidden among the stars.

As Astro-particle physicists and cosmologists reflect on this pivotal study, the implications resound far beyond the immediate results. The interactions between theoretical models and empirical observations within this research could inspire future inquiries, steering scientists towards new frontiers in both cosmology and fundamental physics. The search for dark matter is far from over, and with each passing observation, the universe reveals more of its compelling secrets.

The anticipation of future data collection campaigns utilizing WINERED and other instruments ensures that researchers will continue their quest for understanding dark matter. Under the proposal “eV-Dark Matter search with WINERED,” upcoming observational runs promise to delve deeper, seeking to either corroborate existing findings or present new anomalies for investigation.

In concluding this chapter of their research, the team remains committed to advancing our knowledge about dark matter and its implications for our understanding of the universe. As they prepare for future studies, the excitement surrounding the prospect of detecting dark matter remnants in our vast cosmic neighborhood persists, igniting interest and enthusiasm in the scientific community.

Amidst the persistence of unanswered questions, humanity’s relentless curiosity will undoubtedly keep driving research forward, leading to more profound insights into the cosmic fabric of reality. The interplay of light, decay, and the shadows of dark matter serves as a reminder of the many unknowns that remain, waiting patiently to be uncovered by the relentless pursuit of knowledge and innovation.

The journey to unveil the secrets of dark matter continues to unfold, reminding scientists and enthusiasts alike of the uncharted waters of the universe and the groundbreaking discoveries that lie ahead.

Subject of Research: Dark Matter and Spectrographic Technology
Article Title: First Result for Dark Matter Search by WINERED
News Publication Date: 7-Feb-2025
Web References: N/A
References: N/A
Image Credits: Wen Yin, Tokyo Metropolitan University

Keywords

Dark Matter, Infrared Radiation, Light Sources, Galaxies, Theoretical Physics, Zodiacal Light, Observational Data, Quantitative Analysis, Observable Universe, Astronomy, Cosmology, Particle Theory