Do superstrings exist in two states of spin?

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Discussion Overview

The discussion revolves around the existence of superstrings with different types of spin, exploring whether superstrings can possess spin and how this relates to both closed and open strings. The scope includes theoretical considerations and conceptual clarifications regarding string theory.

Discussion Character

  • Exploratory, Technical explanation, Conceptual clarification, Debate/contested

Main Points Raised

  • One participant questions whether superstrings can exist with two different types of spin and if they possess spin at all.
  • Another participant asserts that superstrings can have spin, suggesting that the "super" in "super-string" unifies integer and half-integer spin, though the classification of string theory as a model or supposition is also questioned.
  • A participant inquires specifically about the spin of open strings, indicating a curiosity about their properties.
  • In response, another participant confirms that open strings can also possess spin, noting that their nature as extensive objects facilitates this property.

Areas of Agreement / Disagreement

Participants express differing views on the nature of string theory and its implications for the existence of spin in superstrings. While there is agreement that both closed and open strings can have spin, the discussion remains unresolved regarding the broader philosophical implications of string theory.

Contextual Notes

Participants discuss the operational meaning of string theory and its classification, which may depend on individual interpretations and definitions. There are also unresolved questions about the specifics of how spin manifests in different types of strings.

epmc2
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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?
 
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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.
 
So what about the spin of open strings?
 
Orbb said:
So what about the spin of open strings?

thats what i thought thanks.
but ya... what about open strings if they exist?
 
Sure them too. As they are not points but extensive objects giving them spin is a simple matter.
 

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