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Do superstrings exist in two states of spin?

  1. Feb 28, 2009 #1
    As you could probably tell, my question is whether or not a superstring could exist with two different types of spin, if they have a spin at all?
     
  2. jcsd
  3. Feb 28, 2009 #2

    jambaugh

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    Do superstrings exist? Firstly you must decide is "string theory" is a model vs. a supposition about reality. Second you must determine if such a supposition about reality is operationally meaningful. But all such philosophical qualifications aside...

    Yes strings can have spin and the "super" in "super-string" unifies integer and half-integer spin within the ... "model"? ..."theory"?

    One way to invoke intrinsic spin in a string is to allow the quantized vibrational excitation correspond to a wave traveling around the loop of a closed string. This traveling vibration will carry a momentum and thus an angular momentum about the string's loop. Higher energy excitations will thus carry higher integer units of angular momentum.
     
  4. Feb 28, 2009 #3
    So what about the spin of open strings?
     
  5. Feb 28, 2009 #4
    thats what i thought thanks.
    but ya... what about open strings if they exist?
     
  6. Feb 28, 2009 #5

    jambaugh

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    Sure them too. As they are not points but extensive objects giving them spin is a simple matter.
     
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