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One doubt about string theory. 
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#1
Mar412, 07:42 PM

P: 129

I read somewhere that one power of string theory is that there is no adjustable dimensionless parameter in the theory. Why is this considered a strong point in favour of string theory?
Second, how does the theory help in solving cosmological constant problem? Again there is no adjustable dimensionless parameter which can be put equal to zero. (The article was written long ago, so the author thinks about putting CC=0 but now we know it has a very small positive value.) 


#2
Mar512, 01:26 AM

Sci Advisor
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#3
Mar512, 02:05 AM

P: 407




#4
Mar512, 06:31 AM

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P: 5,366

One doubt about string theory.



#5
Mar512, 06:34 AM

P: 407

At any rate, string theory is as consistent a theory of QG as it can get, at least in the domain where it can be properly defined. 


#6
Mar512, 07:24 PM

P: 129

Thanks for the responses. However I still do not understand why it should matter whether the parameter we are talking about is dimensionless or dimensionful.



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