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Standardmodellen inom partikelfysik beskriver de kända fundamentalkrafterna och klassifiserar alla de experimentellt observerade elementarpartiklarna. Allmänt sett anses den vara en av de största bedrifterna inom modern vetenskap, tack vare sin förmåga att sammanlänka teoretiska förutsägelser med fenomenologi. Men trots att nästan hela vår förståelse av den subatomära världen ryms i denna modell sThroughout this work we investigate a trinification-based grand unification theory (GUT) with a global family symmetry, as a radiative origin of the Standard Model (SM). We show that after spontaneous symmetry breaking of the trinification gauge group, we can in theory construct an effective left-right symmetric model (LRSM) which breaks to the SM gauge group through radiative breaking induced by

Course Analysis for MATA21 Analysis in One Variable, Autumn 2022 Course information Lecturer: Jan-Fredrik Olsen Teaching assistants: Thomas Munn, Giang To, Alex Bergman Number of students: 89 newly registered and 26 re-registered. 36 students answered the course evaluation Examination Ordinary examination (2023-01-09): 61 out of 86 attending students passed. Out of these, 20 got the pass with dist

https://www.maths.lu.se/fileadmin/maths/Matematik_NF/Kursutvaerderingar/HT2022/MATA21HT22.pdf - 2026-05-18

Världen som vi känner den hålls samman av fyra grundläggande krafter. Gravitationskraften drar oss mot jorden och håller samman planeter, stjärnor och galaxer. Den elektromagnetiska kraften styr i princip allt annat vi upplever i vår vardag. Den starka kärnkraften håller samman protoner och neutroner i atomkärnor och binder de kvarkar som i sin tur bygger upp dessa partiklar, och den svaga kärnkraWe present a generalisation of the flavour-ordering method applied to the chiral nonlinear sigma model with any number of flavours. We use an extended Lagrangian with terms containing any number of derivatives, organised in a power-counting hierarchy. The method allows diagrammatic computations at tree-level with any number of legs at any order in the power-counting. Using an automated implementat

Popular Abstract in Swedish I min forskning undersöker jag hur lagar och regler om asyl översätts till praktik i handläggningen av asylärenden i Sverige. Mina utgångspunkter är samhällets organisation av asylprövningen och strukturerna i denna organisation. I avhandlingen finns en redogörelse för ett enskilt fall. I detta fall finns en mängd av de olika problem som uppstår i asylärenden represente

My talk is intended to stimulate discussions about methods in radiativetransfer for hydrodynamical model atmospheres of late-type stars. I willpresent a number a number of inherent problems, show how they arepresently tackled (if so), and ask for ideas for more efficient approaches.

Context. The solution of the nonlocal thermodynamical equilibrium (non-LTE) radiative transfer equation usually relies on stationary iterative methods, which may falsely converge in some cases. Furthermore, these methods are often unable to handle large-scale systems, such as molecular spectra emerging from, for example, cool stellar atmospheres. Aims. Our objective is to develop a new method, whi

A derivation for a polarized CCFM evolution equation which is suitable to describe the scaling behavior of the unintegrated polarized gluon density is given. We discuss the properties of this polarized CCFM equation and compare it to the standard CCFM equation in the unpolarized case.

A computer program for evaluating colour factors of QCD Feynman diagrams is presented, and illustrative examples on how to use the program to calculate nontrivial colour factors are given. The program and the discussion in this paper is based on a diagrammatic approach to colour factors.

P-mode oscillations in the Sun and stars are excited stochasticly by Reynolds stress and entropy fluctuations produced by convection in their outer envelopes. The excitation increases with increasing effective temperature (until envelope convection ceases in the F stars) and also increases with decreasing gravity.

Context. Streaming instability is a key mechanism in planet formation, clustering pebbles into planetesimals with the help of self-gravity. It is triggered at a particular disk location where the local volume density of solids exceeds that of the gas. After their formation, planetesimals can grow into protoplanets by feeding from other planetesimals in the birth ring as well as by accreting inward

We discuss various models and chiral perturbation theory results for the K14 form factors F and G. We check to what extent a simple parametrization with a few parameters can be used to extract information from experiment.

This data set contains the data from the Galileo dust detector system (GDDS) from start of mission through the end of mission. Included are the dust impact data, noise data, laboratory calibration data, and location and orientation of the spacecraft and instrument.

Abstract The majority of airborne particles in residences, when expressed as number concentrations, are generated by the residents themselves, through combustion/thermal related activities. These particles have a considerably smaller diameter than 2.5 μm and, due to the combination of their small size, chemical composition (e.g. soot) and intermittently very high concentrations, should be regard

An implicit water all-atom model is used to study folding, aggregation and mechanical unfolding of small proteins. Physically reasonable results obtained for a variety of applications indicate healthy global properties of the interaction potential.

ESA's Gaia mission will provide accurate astrometric, photometric andspectroscopic data for millions of stars in the Galaxy and beyond. Wediscuss the prospects of using this vast amount of astrophysicalinformation for understanding star formation histories in the Galaxy andits immediate neighbors within the Local Group.