Physlib.Particles.SuperSymmetry.SU5.ChargeSpectrum.OfFieldLabel
Charges associated with a field label
i. Overview
Recall that a `FieldLabel` is one of the seven possible superfields in the SU(5) GUT, corresponding to the fields present and their conjugates.
Given a charge spectrum `x : ChargeSpectrum 𝓩`, we are interested in the finite set of charges carried by representations associated with a given `FieldLabel`.
Results in this module will be used to find the charges associated with terms in the potential.
ii. Key results
- `ofFieldLabel` : Given a charge spectrum `x : ChargeSpectrum 𝓩`, `ofFieldLabel x F` is the finite set of charges associated with representations corresponding to the field label `F`.
iii. Table of contents
- A. Charges associated with a field label - A.1. The field labels for the empty charge spectrum - A.2. Monotonicity of `ofFieldLabel` - A.3. Membership of conjugate charges - A.4. Extensionality of charge spectra via `ofFieldLabel`
iv. References
There are no known references for the results in this file.
A. Charges associated with a field label
We first define `ofFieldLabel`, which given a charge spectrum `x : ChargeSpectrum 𝓩` and a `FieldLabel`, returns the finite set of charges associated with representations corresponding to that `FieldLabel`.
A.1. The field labels for the empty charge spectrum
We show that the charges associated with any field label for the empty charge spectrum is empty. This follows directly from the definition.
A.2. Monotonicity of `ofFieldLabel`
We show that the function `ofFieldLabel` is monotone in the charge spectrum, with relation to the subset relation. That is for a fixed field label `F`, if `x ⊆ y` are charge spectra, then `ofFieldLabel x F ⊆ ofFieldLabel y F`.
A.3. Membership of conjugate charges
We show that a charge is a member of the finite sets associated with a field label if and only if its negative is a member of the finite set associated with the conjugate field label.
A.4. Extensionality of charge spectra via `ofFieldLabel`
We show that two charge spectra are equal if they are equal on all field labels.
This extensionality lemma is actually overkill in most cases, as there are a lot more direct ways to show that two charge spectra are equal.
7 declarations
Finite set of charges for field label in spectrum
Given a charge spectrum and a field label in an Grand Unified Theory, the function returns the finite set of charges in associated with that label. For labels representing the (Higgs and matter) and (matter) representations, it returns the corresponding set of charges defined in the spectrum . For labels representing the conjugate representations, it returns the set of negated charges , where is the set of charges associated with the non-conjugated field label.
for all field labels
For any field label in an Grand Unified Theory, the finite set of charges in associated with that label in the empty charge spectrum is the empty set .
For any two charge spectra , if , then for any field label , the finite set of charges associated with in is a subset of those in , i.e., .
In an Grand Unified Theory with a charge spectrum , a charge is a member of the set of charges associated with the field label if and only if its negative is a member of the set of charges associated with the conjugate field label .
In an Grand Unified Theory with a charge spectrum , a charge is an element of the set of charges associated with the up-type Higgs field label if and only if its negative is an element of the set of charges associated with the conjugate up-type Higgs field label .
In an Grand Unified Theory with a charge spectrum , a charge is an element of the set of charges associated with the matter field label if and only if its negative is an element of the set of charges associated with the conjugate matter field label .
Let and be two charge spectra over a charge type in an Grand Unified Theory. If for every field label , the finite set of charges associated with for that label is equal to the finite set of charges associated with for that label (i.e., for all ), then the charge spectra and are equal ().
