2 Tweak
source | link

The notation $pp \rightarrow t\bar{t}$ doesn't literally mean the two protons disappear leaving just a top and antitop. It means a top and antitop are created as well as a shower of other debris.

Because protons are composite objects a 13TeV proton-proton collision is an exceedingly messy business. At that energy the quarks are resolved so it's really a quark-quark collision with the other contents of the proton more or less involved. As the reaction products leave the site of the collision the QCD binding energy produces a whole mess of particles. The dominant process for top-antitop production of the LHC is from two gluons i.e. $gg \rightarrow t\bar{t}$.

The calculation of the $pp \rightarrow t\bar{t}$ probability is the probability that the debris includes a top-antitop pair.

  Likewise for the other reactions listed on that page.

The notation $pp \rightarrow t\bar{t}$ doesn't literally mean the two protons disappear leaving just a top and antitop. It means a top and antitop are created as well as a shower of other debris.

Because protons are composite objects a 13TeV proton-proton collision is an exceedingly messy business. At that energy the quarks are resolved so it's really a quark-quark collision with the other contents of the proton more or less involved. As the reaction products leave the site of the collision the QCD binding energy produces a whole mess of particles. The calculation of the $pp \rightarrow t\bar{t}$ probability is the probability that the debris includes a top-antitop pair.

  Likewise for the other reactions listed on that page.

The notation $pp \rightarrow t\bar{t}$ doesn't literally mean the two protons disappear leaving just a top and antitop. It means a top and antitop are created as well as a shower of other debris.

Because protons are composite objects a 13TeV proton-proton collision is an exceedingly messy business. At that energy the quarks are resolved so it's really a quark-quark collision with the other contents of the proton more or less involved. As the reaction products leave the site of the collision the QCD binding energy produces a whole mess of particles. The dominant process for top-antitop production of the LHC is from two gluons i.e. $gg \rightarrow t\bar{t}$.

The calculation of the $pp \rightarrow t\bar{t}$ probability is the probability that the debris includes a top-antitop pair. Likewise for the other reactions listed on that page.

1
source | link

The notation $pp \rightarrow t\bar{t}$ doesn't literally mean the two protons disappear leaving just a top and antitop. It means a top and antitop are created as well as a shower of other debris.

Because protons are composite objects a 13TeV proton-proton collision is an exceedingly messy business. At that energy the quarks are resolved so it's really a quark-quark collision with the other contents of the proton more or less involved. As the reaction products leave the site of the collision the QCD binding energy produces a whole mess of particles. The calculation of the $pp \rightarrow t\bar{t}$ probability is the probability that the debris includes a top-antitop pair.

Likewise for the other reactions listed on that page.