Essays about: "sigma model"

Showing result 21 - 25 of 70 essays containing the words sigma model.

  1. 21. Electromagnetic form factors of the Sigma*-Lambda transition

    University essay from Uppsala universitet/Kärnfysik

    Author : Timea Vitos; [2019]
    Keywords : hyperon form factors; dispersion relations; anomalous cuts;

    Abstract : We introduce and examine the analytic properties of the three electromagnetic transition form factors of the Sigma*-Lambda hyperon transition. In the first part of the thesis, we discuss the interaction Lagrangian for the hyperons at hand. READ MORE

  3. 22. Modelling and evaluation of fasteners under fatigue

    University essay from KTH/Skolan för industriell teknik och management (ITM)

    Author : Vignesh Nagarajan; [2019]
    Keywords : fastener; bolted joints; failure; simulations; brott; fästelement; simulering; skruvförband; ;

    Abstract : At the calculations group in Sigma Industry East North, the traditional method for evaluating fasteners has been by use of the VDI2230 manual. As the complexity of a model increases the evaluation also becomes harder. The goal of this thesis is to set a robust evaluation method by combining the VDI2230 with the Finite Element (FE) method. READ MORE

  4. 23. Flavour-ordering in the nonlinear sigma model with more derivatives and legs

    University essay from Lunds universitet/Teoretisk partikelfysik - Geonomgår omorganisation; Lunds universitet/Institutionen för astronomi och teoretisk fysik - Genomgår omorganisation

    Author : Mattias Sjö; [2019]
    Keywords : Particle physics; effective field theory; QCD; mesons; amplitudes; Physics and Astronomy;

    Abstract : We 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. READ MORE

  5. 24. CP Violation in Σ0 decay

    University essay from Uppsala universitet/Kärnfysik

    Author : Shankar Nair; [2018]
    Keywords : ;

    Abstract : The non-trivial structure of the QCD vacuum gives rise to a P and CP violating term in the QCD Lagrangian. The fact that we do not see an observable CP violation in the strong interaction despite this CP violating theta term is called the Strong CP Problem. READ MORE

  6. 25. Analyse and Improve Internal Water Treatment System at STENA Recycling : Master's Programme in Mechanical Engineering

    University essay from Högskolan i Halmstad/Akademin för ekonomi, teknik och naturvetenskap

    Author : Dany Paul Brahmakulam jacob; Gustaf Johannesson; [2018]
    Keywords : Six Sigma; Improvement; Water treatment;

    Abstract : The thesis work is done at STENA Recycling Halmstad. The recycling facility has a yearly capacity to process 110.000 tonnes of material. There is an internal water system that circulates water to each of the separation processes and cleans before recirculation. READ MORE