H2020Индивидуална стипендия2018–2020

DarkMatterAndHiggs · Searching for Dark Matter in the Higgs boson sector with the ATLAS detector

„Хоризонт 2020“ — Действия „Мария Склодовска-Кюри“

Период: 2018-08-06 → 2020-08-05
Финансиране от ЕС: 208 400 €
Участници: 1
Схема: MSCA-IF-EF-ST

Линиите свързват координатора с партньорите.

Накратко на български

Търсенето на тъмна материя се фокусира върху събития, при които тя се създава заедно с бозон на Хигс, разпадащ се до тау-лептони. Разбирането на тази материя е важно, защото тя доминира в състава на вселената и е повлияла на нейната еволюция.

Този кратък обзор е генериран от изкуствен интелект

Кратко обяснение, генерирано от езиков модел по текста на CORDIS. Оригиналът е по-долу.

Резултати накратко

Searching for Dark Matter in the Higgs boson sector with the ATLAS detector

The main goal of this project is to contribute to the efforts to uncover the particle nature of Dark Matter - a type of matter that is dominating the matter content of our universe but as of now poorly understood. Through its overwhelming abundance, Dark Matter played a crucial role in the evolution of our universe and thus of life itself, such that its thorough understanding is worthwhile. In order to reach this goal, the data collected by the ATLAS experiment at CERN's Large Hadron Collider is analysed. This analysis focuses on events where Dark Matter particles are produced in association with a Higgs boson - the latest piece of the Standard Model of particle physics that was discovered. The decay of the Higgs boson to tau leptons is exploited as this allows for a different way to trigger the readout of the events compared to the more abundant decay to b-type quarks. This decay channel was hitherto unexplored by the ATLAS Collaboration such that this project allowed to widen the search portfolio of ATLAS. By exploring this channel in addition to the on-going Dark Matter searches of ATLAS more insight can be gained as this channel focuses on a different part of the phase space of the data set. This point is strengthened by combining the results of the different ATLAS Dark Matter searches to set a common limit on Dark Matter models. By the end of the project, no sign of Dark Matter was observed at the LHC, but more insights on how Dark Matter is not produced was gained.

Текст от CORDIS, на английски · Данни: CORDIS, © Европейски съюз

Цел на проекта

According to modern cosmological models only 16% of all matter in our universe corresponds to the known, visible matter. The other 84% is called dark matter (DM) and could so far only be observed indirectly, which is why its particle nature is poorly understood. Yet, DM played a crucial role during the evolution of our universe and thus the formation of life itself. Therefore, the understanding of DM is an important aim of contemporary physics and is pursued in this fellowship.With this research proposal, I will endeavour to uncover the particle nature of DM by analysing the proton collisions of the Large Hadron Collider recorded with the ATLAS detector at a centre of mass energy of 13 TeV. I will study whether DM is produced in the collisions by analysing events containing a Higgs boson decaying to two tau leptons and missing transverse energy, the iconic signature of weakly interacting particles. This search channel has not been exploited before and complements the current searches for DM performed by the ATLAS collaboration. I will develop a strategy to identify these Higgs decays by using novel physics quantities and machine learning methods. The results will be interpreted in different models that describe DM.Furthermore, I will combine the results of different Higgs plus DM searches of the ATLAS Collaboration to maximise their discovery reach. Their sensitivity will be increased through the exploitation of the uncertainty correlation between the different measurements and results from other DM searches will be incorporated. This way, my proposal connects the fields of high energy physics, astroparticle physics, cosmology and computer science with the aim to uncover the true nature of DM in our universe.

Оригинален текст от CORDIS (на английски).

Участници

UNIVERSITETET I BERGEN · BergenКоординаторНорвегия