Quantcast
  • Register
PhysicsOverflow is a next-generation academic platform for physicists and astronomers, including a community peer review system and a postgraduate-level discussion forum analogous to MathOverflow.

Welcome to PhysicsOverflow! PhysicsOverflow is an open platform for community peer review and graduate-level Physics discussion.

Please help promote PhysicsOverflow ads elsewhere if you like it.

News

PO is now at the Physics Department of Bielefeld University!

New printer friendly PO pages!

Migration to Bielefeld University was successful!

Please vote for this year's PhysicsOverflow ads!

Please do help out in categorising submissions. Submit a paper to PhysicsOverflow!

... see more

Tools for paper authors

Submit paper
Claim Paper Authorship

Tools for SE users

Search User
Reclaim SE Account
Request Account Merger
Nativise imported posts
Claim post (deleted users)
Import SE post

Users whose questions have been imported from Physics Stack Exchange, Theoretical Physics Stack Exchange, or any other Stack Exchange site are kindly requested to reclaim their account and not to register as a new user.

Public \(\beta\) tools

Report a bug with a feature
Request a new functionality
404 page design
Send feedback

Attributions

(propose a free ad)

Site Statistics

205 submissions , 163 unreviewed
5,082 questions , 2,232 unanswered
5,353 answers , 22,789 comments
1,470 users with positive rep
820 active unimported users
More ...

  Is there a list of all possible Super-Poincaré algebras up to 11D and their physical supermultiplet representations?

+ 4 like - 0 dislike
1086 views

From looking around it seems like there are

 - In each dimension (greater than 1, 2, or maybe 3*) essentially a finite number of possible central extensions of the Super-Poincaré algebra (of various N or (N,M) extended supersymmetry) up to continuous parameters that don't essentially change the algebra (except maybe at special values defined by at most a finite number of algebraic relationships between the central charges Edit: I realized that the lie superalgebra doesn't actually encode any information about the central charges other than that they are non-zero and commute, so any relationships betwen them would be in the representation, not the algebra, I think).
 - For each Super-Poincaré algebra with central extension a finite number of supermultiplet representations that are non-negative mass squared and do not contain spins greater than 2.

The classification of the central extensions is certainly non-trivial and because of various kinds of short multiplets the categorization of the physically relevant irreducible supermultiplets is possibly non-tivial.

It seems that because of the eccentricities of lower dimension Lorentz groups that the set of possibilities is very irregular, but because everything is finite it feels like a complete list could be enumerated, perhaps by computer, but I can't find anything even approaching it.

*I know that in lower dimensions there are more possibilities for supersymmetry because of anyons and similar phenomena. I wouldn't be surprised if below a certain dimension it becomes infinitely more complicated, but I don't know if and where that happens.

asked Aug 13, 2015 in Theoretical Physics by Exomnium (20 points) [ revision history ]
edited Aug 13, 2015 by Exomnium

1 Answer

+ 2 like - 0 dislike

Those "central" extensios are classified in

(I understand that this does not answer your entire question, but it seems to answer the first part.)

answered Sep 14, 2017 by Urs Schreiber (6,095 points) [ revision history ]

Your answer

Please use answers only to (at least partly) answer questions. To comment, discuss, or ask for clarification, leave a comment instead.
To mask links under text, please type your text, highlight it, and click the "link" button. You can then enter your link URL.
Please consult the FAQ for as to how to format your post.
This is the answer box; if you want to write a comment instead, please use the 'add comment' button.
Live preview (may slow down editor)   Preview
Your name to display (optional):
Privacy: Your email address will only be used for sending these notifications.
Anti-spam verification:
If you are a human please identify the position of the character covered by the symbol $\varnothing$ in the following word:
p$\hbar$y$\varnothing$icsOverflow
Then drag the red bullet below over the corresponding character of our banner. When you drop it there, the bullet changes to green (on slow internet connections after a few seconds).
Please complete the anti-spam verification




user contributions licensed under cc by-sa 3.0 with attribution required

Your rights
...