Our research is conducted in the fields of particle physics and astroparticle physics.
- Studies of the Higgs particle and searches for physics beyond the Standard Model with the ATLAS experiment at CERN 's Large Hadron Collider
- Signatures of the photosphere in GRBs
- GRB jet properties, particle acceleration, emission mechanisms
- Disk jet connection in AGNs
- Multiwavelength studies of blazars
- Hard X-ray polarisation of the Crab and Cygnus X-1
Particle physics studies the smallest building blocks of matter and the interactions through which they interact. The word "particle" generally refers to various types of small objects (e.g. protons, gas particles, or even household dust), but particle physics concerns the indivisible constituents of matter, the so-called elementary particles, that exist now and have existed in the early universe, and the fundamental interactions necessary to explain their behaviour and processes at the highest energies.
The experimental particle physics group at KTH is active at the frontline of hadron collider physics and has contributed to the ATLAS experiment since 1990.
- The scientific focus of the data analysis activities is on measuring the properties of the Higgs boson and searches for physics beyond the standard model, specifically new particles that could explain the dark matter that dominates our universe.
- The group contributes actively to detector instrumentation, from 1990 to the development, construction, commissioning and operation of the electromagnetic calorimeter based on liquid-argon technology, and for the High-Luminosity LHC the group is contributing to the development of the High-Granularity Timing Detector which will provide picosecond timing measurements.
Astroparticle physics is a branch of particle physics that studies elementary particles of astronomical origin and their relation to astrophysics and cosmology. It is a relatively new field of research emerging at the intersection of particle physics, astronomy, astrophysics, detector physics, relativity, solid state physics, and cosmology.
Currently we are doing research within :
Gamma-ray bursts, supernovae and active galactic nuclei
- Gamma-ray bursts: we are analyzing properties of primarily properties of long gamma-ray bursts both from theoretical and observational side. We are studying signatures of photospheres in gamma-ray bursts, emission mechanisms in both prompt and the afterglow phase and developing different models for explaining the observed properties.
- Supernovae: main focus is on the SN 1987A that exploded in Large Magellanic Cloud. We are also studying properties of the explosions of core-collapse supernovae and their remnants to get better understanding of the explosion mechanisms.
- Active Galactic Nuclei (AGN): we are doing multi-wavelength variability studies of AGNs in order to locate and better understand the high-energy emitting regions. Also, we are investigating multi-wavelength properties of blazars.
- Cosmic rays: in this area we are doing multimessenger studies to investigate connection with neutrions.
Instrumentation and development of new space missions
- PoGOLite/PoGO+ Hard X-ray polarisation of the Crab and Cygnus X-1 : A balloon-borne Compton telescope launched from the Esrange Space Center, northern Sweden, in 2016. Our observations have revealed the hard X-ray polarization fraction and direction of the Crab , elucidated properties of is periodic pulsations , constrained the emission geometry of the Cygnus X-1 binary system , and provided an upper flux limit for its synchrotron jet emission .
- CUBES : a part of the MIST student satellite. A technological readiness demonstrator for evaluating the performance of novel detector materials and techniques which have limited space heritage. These include MPPC photo-sensors and GAGG inorganic scintillators.
- X-Calibur/XL-Calibur: A balloon-borne X-ray polarimeter achieving high sensitivity through the use of X-ray optics for focusing emission onto a compact detector system. A short flight was conducted from McMurdo, Antarctica, in late 2018, during which the GX 301-2 pulsar was studied . The payload is currently being upgraded (X -> XL) with a new mirror and detector to allow even better sensitivity for an upcoming flight.
KTH Space Center
KTH Space Center coordinates and promotes space-related activity at several KTH departments, with an overarching objective of establishing KTH as a "Space University" and a hub for Swedish space research and technology.
Oskar Klein Centre
We are a part of the Oskar Klein Centre for Cosmoparticle Physics where researchers and students enjoy a large palette of supporting activities like weekly OKC Colloquia, biweekly Working Group meetings, OKC Day gatherings every term, and cross-disciplinary science pubs. The OKC carries out a number of popular science outreach activities in order to share our operations with the public.