We use cookies to distinguish you from other users and to provide you with a better experience on our websites. Close this message to accept cookies or find out how to manage your cookie settings.
To save content items to your account,
please confirm that you agree to abide by our usage policies.
If this is the first time you use this feature, you will be asked to authorise Cambridge Core to connect with your account.
Find out more about saving content to .
To save content items to your Kindle, first ensure [email protected]
is added to your Approved Personal Document E-mail List under your Personal Document Settings
on the Manage Your Content and Devices page of your Amazon account. Then enter the ‘name’ part
of your Kindle email address below.
Find out more about saving to your Kindle.
Note you can select to save to either the @free.kindle.com or @kindle.com variations.
‘@free.kindle.com’ emails are free but can only be saved to your device when it is connected to wi-fi.
‘@kindle.com’ emails can be delivered even when you are not connected to wi-fi, but note that service fees apply.
In this chapter we will describe the construction of supersymmetric Lagrangians. Our aim is to arrive at a recipe that will allow us to write down the allowed interactions and mass terms of a general supersymmetric theory, so that later we can apply the results to the special case of the MSSM. However, we will not use the superfield language in this chapter, which is often more elegant and efficient for many purposes, but requires a more specialized machinery and might seem rather cabalistic at first.
In , we have found a general recipe for constructing Lagrangians for softly broken supersymmetric theories. We are now ready to apply these general results to the MSSM. The particle content for the MSSM was described in . In this chapter we will complete the model by specifying the superpotential and the soft supersymmetry-breaking terms.
In the MSSM, supersymmetry breaking is simply introduced explicitly. However, the soft parameters cannot be arbitrary. In order to understand how patterns like eqs. (13.24)–(13.26) can emerge, it is necessary to consider models in which supersymmetry is spontaneously broken.
An attractive feature of supersymmetric quantum field theories is that their ultraviolet divergences are better behaved, as compared to ordinary quantum field theories.
In this chapter, we examine the incorporation of spin-1/2 fermions into quantum field theory. Underlying the relativistic theory of quantized fields is special relativity and the invariance of the Lagrangian under the Poincaré group, which comprise Lorentz transformations and spacetime translations (e.g., see [–]).