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Asakawa Lab
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A nuclear theory lab that explores the behavior of quarks through theory.
AboutAbout the lab
Exploring quark confinement and deconfinement through theory
The Asakawa Lab (Nuclear Theory Group) theoretically studies the physics of quarks, the constituents one arrives at when protons and neutrons are broken down further.
In today's universe, quarks are confined inside hadrons and are not observed on their own.
The lab aims to elucidate the phenomena that occurred as the universe evolved from its extremely hot early stage to its present form, and to investigate the internal structure and reactions of hadrons.
At times the lab also performs first-principles simulations on supercomputers, and it is strong in this type of problem.
Key terms
- Quark
- A constituent one arrives at when protons and neutrons are broken down further. Normally confined inside hadrons
- Confinement phase transition
- A change between a state in which quarks are confined inside hadrons and a state in which they are released from confinement
- Quantum chromodynamics (QCD)
- The theory that governs the interactions between quarks
NewsLab news
Paper by Assistant Professor Murase et al. published in Physical Review C
Paper by Assistant Professor Murase et al. published in Journal of Subatomic Particles and Cosmology
Paper by Assistant Professor Murase et al. published in Physical Review D
Paper by Professor Asakawa et al. published in Physical Review C
ResearchResearch themes
The lab studies the physics of quarks and hadrons, from the early universe to the present, using the theory of quantum chromodynamics (QCD). It investigates phenomena such as the quark confinement phase transition, as well as the internal structure and reactions of hadrons, including comparisons with experiments.
*Illustrative imageQuark Confinement and Phase Transitions
It is known that in the extremely hot early universe, quarks existed in a state released from confinement. The lab aims to elucidate, through theory, the confinement phase transition and spontaneous symmetry breaking that occurred as the universe evolved into its present form.
*Illustrative imageInternal Structure and Reactions of Hadrons
The lab investigates the internal structure and reactions of hadrons in the present universe, and studies the rich dynamics woven by quantum chromodynamics (QCD). It also aims to explore theoretical frameworks beyond QCD and the Standard Model.
*Illustrative imageComparison with Experiments and First-Principles Calculations
Comparison with experiments such as ultrarelativistic nuclear collisions is the key to this research. At times the lab performs first-principles simulations on supercomputers, and it is strong in this type of problem.
MembersFaculty
Members of the Asakawa Lab (Nuclear Theory Group) consist of faculty, secretaries, and doctoral, master's, and undergraduate students.As of 2026
- ProfessorMasayuki Asakawa
- Assistant ProfessorKoichi Murase
- Assistant ProfessorNoriyuki Sogabe
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Report an errorAbout the images
The top and research theme images are illustrative and were not taken at the lab. They are cropped from Wikimedia Commons images. Cropped CC BY-SA images are provided under the same CC BY-SA license as the original (version shown on each line).
- Top image: “STAR Detector at Relativistic Heavy Ion Collider” Z22 / CC BY-SA 4.0 (cropped)
- Quark Confinement and Phase Transitions: “ZEUS-Event” DESY-Kommunikation / CC BY-SA 4.0 (cropped)
- Internal Structure and Reactions of Hadrons: “Quark-gluon-plasma” S13mashina / CC BY-SA 4.0 (cropped)
- Comparison with Experiments and First-Principles Calculations: “View of gold ions collision” Brookhaven National Laboratory / CC BY 2.0 (cropped)
- Related lab (板橋グループ（原子核実験）
): “ZEUS-Detektor 3D-Grafik” DESY-Kommunikation / CC BY-SA 4.0 (cropped) - Related lab (工藤グループ（量子物質開発グループ）
): “Magnetic Levitation Experiment, Science Gallery Dublin, Ireland” Maria Delaney / CC BY-SA 4.0 (cropped)
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