Particle Physics

Lund University

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Master's Projects

Master Projects Areas

Master projects in Particle Physics can be pursued in these areas:

A typical project in any of these areas would involve data analysis, computer-based modelling and/or programming, therefore for best results the students should be familiar with a Linux operating system, C++ programming language and ROOT analysis framework, e.g. by taking the MNXB01 course or similar. 

ALICE Projects

The ALICE experiment at the Large Hadron Collider (LHC) at CERN is dedicated to studies of high-energy heavy-ion collisions, in which lead (Pb) nuclei collide at ultrarelativistic speeds to produce a unique phase of matter, the quark-gluon plasma (QGP). In this novel state of matter, the temperature and energy density are so high that quarks and gluons are no longer bound into the hadrons that make up normal matter, and thus by studying the properties of the QGP created in lead-lead (Pb-Pb) collisions we learn about nuclear matter and quantum chromodynamics (QCD) under extreme conditions. 

ALICE also collects data in proton-proton (pp) and proton-lead (p-Pb) collisions, and has observed surprising similarities between these small collision systems and Pb-Pb collisions. A significant fraction of the work ongoing in the Lund ALICE group is dedicated to understanding the connections between pp, p-Pb, and Pb-Pb collisions, in order to improve our understanding not only of heavy-ion collisions but also of the high-energy proton-proton collisions at the LHC.

ATLAS Projects

The ATLAS experiment is one of the two largest experiments at the LHC at CERN. ATLAS is designed to search for new particles in proton-proton collisions at this world's most powerful accelerator, which saw first particle collisions in late 2009. Together with another large experiment (CMS), ATLAS announced the discovery of the Higgs boson in 2012.

The most ambitious goal of ATLAS is to discover new phenomena beyond the current Standard Model (BSM) of Particle Physics, such as, for example, Supersymmetry or particle Dark Matter. ATLAS also studies Standard Model phenomena, heavy quarks and heavy ion collisions. We also develop instruments and software tools and methods that make the experiment working.

LDMX Projects

The Light Dark Matter eXperiment (LDMX) is a proposed accelerator-based experiment to search for light Dark Matter particles. The origin and observed abundance of Dark Matter in the Universe can be explained elegantly by the thermal freeze-out mechanism, leading to a wide mass range of the Dark Matter particles in the MeV-TeV region. The heavy GeV-TeV mass range is being explored intensely by the variety of experiments searching for Weakly Interacting Massive Particles (WIMPs). The  light sub-GeV region, however, in which the masses of most of the building blocks of stable matter lie, is hardly being tested experimentally to date. LDMX is a planned electron-beam fixed-target experiment, that has unique potential to conclusively test models for such light Dark Matter in the MeV to GeV range. 

Diploma projects within the LDMX group include work on various aspects of Dark Matter studies, detector simulation, data analytics etc..

    Computing for HEP projects

    Modern Particle Physics requires complex and highly customized software, as well as  large computing power and data storage capacities. Development of software solutions for Particle Physics is as important as detector or accelerator devlopment, and is a field of intensive research, resulting in numerous publications and solutions that find use in other areas of human activities. Famously, World Wide Web was developed at CERN as a tool to cross-link documents stored in different servers. The Worldwide LHC Computing Grid cross-links scientific data and enables complex distributed workflows. 

    Diploma projects in computing are typically linked to one of the experiments listed above, or may be of a generic cross-HEP nature. Students are expected to be familiar with code development, knowledge of C++ is most beneficial.