Lecture 9 | String Theory and M-Theory

[grunder20]

Really didnt understand what M theory is.

[Dilaton100]

Prof. Susskind seems not to be a fan of his colleagues doing F-theory, they have 10 space and 2 time (alltogether 12 !) dimensions LOL :-D ...

[AdrewFilms]

"If you want to know the future history of it..."

[csmcmillion]

"and take it, to the limit, one more time."

[agapitoflores001]

This is just so informative. It's as if I'm in Stanford.

[euroroomer]

i am literally amazed such a university and such a professor of such caliber would offer this...for free. Tale about a commitment to education!

[Chronosaur]

No no,

no no no no,

no no no no,

no no there's no limit!

[dragonograd]

makes it sound so simple!

[dragonograd]

fantastic :)

[Engravingsful]

String theory are superstition

[superok4luv2u]

@Engravingsful no it's not

[superok4luv2u]

@Engravingsful string theory is not superstition it can be falsified by falsifying quantum theory or general relativity

[drsaberkhan]

@superok4luv2u thats empirical falsification, and same as saying `yeah its falsifiable if EVERY THEORY is false this one goes out the window as well'. youd also be falsifying QCD, QED, lets see LCQ, twistor theory and twistor-string hybrids, causal set theory'. and re-disprove e8's nutjob theory. plus since QM and GR have been experimentally proven 100s of times, its still the same as saying theyre not falsifiable. and please dont go `current vs future-possible experimental disproofs' :)

[drsaberkhan]

@superok4luv2u sorry the e8 dig was out of context since the theorys still not past 1st level fermions its incomplete and therefore unfalsifiable :)

[csmcmillion]

@Engravingsful > String theory are superstition

A stunningly ignorant statement.

[UniversumExNihilo]

I would suggest looking at publications in the Arxiv for data from the LHC itself, rather than discussion articles that you can't even remember the name of.

[UniversumExNihilo]

@RobotechMacrossGame

What does the higgs boson have to do with string theory? The higgs boson was a prediction of glashow-salam-wienberg theory, which makes up half of the standard model, NOT string theory. It was announced in "SM Higgs boson searches in the early ATLAS data" that surveys for the Higgs boson won't be finished until at least december of 2013, so there is no definitive judgement from the LHC regarding the higgs boson's existence.

[mik99D]

@UniversumExNihilo But M theory has to be able to describe all of the standard model as well. So it has to describe the colour force, which is Gell-Man's model. It also has to describe mass (Higg's field) and Gravity (Einstein's field theory but as a particle field). So regardless of who first came up with it. For string theory to ork it has to encompass all current theories and describe what we already observe.

[UniversumExNihilo]

@RobotechMacrossGame

Which one of the papers from which project published these results? I've been watching the peer reviewed literature from all of the projects from the LHC closely, and so far, they've only released results for some aspects of technicolor, SUSY, and some other minor fields. If you could name the paper, maybe I missed it, I would much appreciate it.

[jadlerhalofan]

This is great. Thanks!

[unstoic5]

Prof. Susskind has all my respect.

[bachatr]

great lecture, thanks!

[Silhouette93]

When will the next lectures be published online?

Been watching my iTunes subscription since 8th of march :(

[Funtasmia]

Thank you!