DETERMINATION OF BOUNDS OF DARKSTRAHLUNG MODEL FROM THE LHC AND FERMI-LAT DATA

• Main Author: Hidayat, Michael
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/49025
• Institution: Institut Teknologi Bandung

The existence of dark matter in the universe has been proven by various observations at the galaxy scale, the galaxy cluster, and the cosmology scale. Based on the data from Wilkinson Microwave Anisotropy Probe (WMAP), dark matter fills 24% of our universe. Until now, dark matter only interacts gravitationally with the other matters and is hypothezied to interact very weak with the other matters based on Weakly Interacting Massive Particles (WIMP) scenario. The other dark matter’s characteristics, such as its mass, spin, and the other interactions are still elusive. Therefore, in other to get the other dark matter’s characteristic, many assumptions and models are proposed, one of them is the darkstrahlung model. Darkstrahlung model is a model that observes the presence of dark gauge boson from U(1)D group which mixes with U(1)Y standard model particles through a kinetic mixing operator. The interaction between particle with q can be written in the form of effective operator, that is 1 2 V (q q)( ) dan 1 2 A (q 5q)( 5). This model also assumes that the dark matter is charged under the U(1)D, hence dark matter particle then will radiate Z0 boson, and the Z0 boson then will decay to leptonantilepton. The darkstrahlung model then will be observed at LHC with MadGraph simulation and at Fermi-LAT with MadDM simulation. The simulation is carried out using Z’ boson from 130 – 300 GeV and it is assumed as well mZ0 < 2m. The results from both observations are then compared and obtained a constraint for darkstrahlung model. The result we get that darkstrahlung model bounds for both effective operator 1 2 V (q q)( ) dan 1 2 A (q 5q)( 5) are better bound at LHC than Fermi-LAT.