how many propreties of particles of the standard model has lqg been able to describe within its conceptual framework, as opposed to string theory?(adsbygoogle = window.adsbygoogle || []).push({});

recently i posted "lee smolin & standard model" evidently loop quantum gravity might be able to model some elementary particles properties including photons, electrons, positrons, etc. i would hope that since string theory has been worked on for over 30 years, it should be able to describe the properties of more particles of the standard model, including the 3 generation puzzle, than a 1-paper from Sundance Bilson-Tompson.

Do string theoriets believe they can describe all of the particles of the standard model as 1D strings, all quarks, fermions, bosons? Can it explain the 3 generations? While string theory believes D-branes exist mathematically, do they also model standard model particles/black holes or are they just matemathical artifacts without physical meaning? Does Sundance Bilson-Thompson hope to achive this with his preon and how rigirous can you derive his preon model from spin netowrk?

string theory has been worked on for over 30 years. which particles of the standard model whose properties has string theory been able to reproduce with its 1D model of strings, for example, has string theory been able to reproduce photons, quarks, electrons, neutrinos as 1D strings with tension/vibrations? gravitons are not particles of the standard model.

does this automatically imply modelling the supersymmetric partners of each particle as well (if they even exist)?

i understand that string theory can reproducing hawking-berkenstein entropy for extremel, and near-extremel black holes, but how about ordinary non-extremel black holes?

thanks

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# String theory & standard model & black hole entropy

**Physics Forums | Science Articles, Homework Help, Discussion**