Phd defence by Morten Dam Jørgensen – University of Copenhagen

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Phd defence by Morten Dam Jørgensen

EXOTIC LONG-LIVED PARTICLES (in english below)

Morten Dam Jørgensen, Phd studerende ved Discovery Center på Niels Bohr Institutet.

Denne afhandling beskriver jagten på nye partikler ved LHC med så lange levetider, at man kan observere dem direkte i ATLAS detektoren, en partikeldetektor på størrelse med et 6 etagers hus. Hvis disse partikler findes, kan det pege på en forklaring af mørkt stof, en gåde i astronomomien. 

Afhandlingen afdækker hertil også nye metoder til observation af mørkt stof i universet med IceCube neutrino detektoren på sydpolen. IceCube er en kubikkilometer i volumen, og er bygget til at måle neutrinoer fra verdensrummet. I afhandlingen beskrives, hvordan en udbygning af IceCube kan åbne op for nye muligheder i jagten på det mørke stofs natur.

Til sidst beskrives, hvordan magnetiske monopoler med lang levetid kan opdages ved at kigge på vakuumrøret i LHC med et superledende magnetometer. 

Afhandlingen kan hentes som pdf eller læses online: http://llp.gluino.com


In english

With the LHC we hope to unravel the deepest secrets of reality: What is everything made of, what holds it together, do we understand the nature of matter at all? The subject of the defines is a search for new long-lived particles that could point to an explanation of what the dark matter in the universe is. If discovered these long-lived particles would break with 40 years of canonical physics, as the Standard Model of Particle physics would fail to explain its existence, something that would require Supersymmetry, extra spatial dimensions or even more exotic theories.

In addition to this search, another type of long-lived particles, magnetic monopoles will be introduced. If monopoles are produced at the LHC they can be found stuck to the beam-pipe circulating the colliding particles.

Last, new techniques for the future low-energy neutrino experiment PINGU will be presented. PINGU will be an upgrade to the larger 1 cubic kilometre IceCube detector at the South Pole.