particle-physics

As @bnachman mentioned in PR #35

Each heading has a small bit of explanation. This appears in the .tex and .pdf versions, but not the markdown (but only because I did not have enough time to make that happen - we can revisit that in the future).

These very nice summaries that Ben has added to the TeX source would be nice to additionally get propagated into the Markdown output as well as t

The current code does not support the domain-wall fermion, which
is widely used in lattice QCD.
The code has Wilson fermion and the domain-wall fermion can be realized by
multiple of Wilson fermions.

Suppose you have a few events to keep by index

julia> keep = findall(>(45),tf.nMuon)
3-element Vector{Int64}:
 35499643
 48770485
 53288840

julia> @time tf[keep]
  0.000007 seconds (1 allocation: 256 bytes)
3-element Vector{UnROOT.LazyEvent{TypedTables.Table{NamedTuple{(:Muon_phi, :nMuon, :Muon_pt, :Muon_eta, :Muon_charge, :Muon_mass), Tuple{SubArray{Float32, 1, Vector{Float32}

It is convenient to get particles by their string name rather then id
it would be nice to store the charge in the text identified.

For example:
I would like to call Sigma(c)(2455)+, Sigma(c)(2455)++, or Sigma(c)(2455)0.
Now, all of them are "Sigma(c)" in the list

filter(p->occursin(r"Sigma\(c*\)", p.name), particles())

![image](https://user-images.githubusercontent.com/