Higgsino: The Supersymmetric Partner of the Higgs - What You Need to Know

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Discussion Overview

The discussion revolves around the properties and implications of the Higgsino, the proposed supersymmetric partner of the Higgs boson. Participants explore the expected mass relationship between the Higgs and its supersymmetric counterpart, as well as the validity of sources cited in support of these claims. The conversation touches on theoretical aspects of supersymmetry and the nature of fundamental particles in the Standard Model.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants assert that the Higgsino is expected to be significantly less massive than the Higgs boson, raising questions about its detectability in experiments.
  • Others challenge the claim regarding the Higgsino's mass, arguing that in supersymmetry, the Higgs sector includes multiple particles, complicating the notion of a "pure" Higgsino and rendering mass statements ambiguous.
  • One participant references Roger Penrose's assertion that spin-0 particles, including the Higgs, should be more massive than their superpartners, suggesting this is a fundamental principle due to the nature of spin.
  • Concerns are raised about the credibility of sources cited, with calls for specific references rather than vague "internet sources." A later reply dismisses a cited book as a valid reference, labeling it as pop science rather than a peer-reviewed source.

Areas of Agreement / Disagreement

Participants express disagreement regarding the mass relationship between the Higgs and the Higgsino, with no consensus reached on the validity of the claims or the sources cited.

Contextual Notes

Participants highlight the need for rigorous sourcing in discussions, indicating that claims based on non-peer-reviewed materials may not be acceptable in this forum context.

hyksos
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TL;DR
SUSY supersymmetry Higgsino
Supersymmetric partners are expected to only pair off with "fundamental" particles of the Standard Model. (photon, W, Z, gluons, leptons, quarks, graviton). In all those canonical particles, the SUSY partner is significantly more massive than its counterpart.

Internet sources suggest that unofficial name of the supersymmetric partner to the Higgs is the "Higgsino". Unlike the rest of the particle pantheon, the Higgsino should be significantly less massive than the Higgs boson. Does this low mass mean we should have already found the Higgsino in experiments?

Any other notes we should know about the Higgsino?
 
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hyksos said:
Internet sources

Hey why look at those stuffy old peer-reviewed papers when you have a couple of guys on the internet?

hyksos said:
Unlike the rest of the particle pantheon, the Higgsino should be significantly less massive than the Higgs boson.

I think you just made this up. You didn't give a source, and if you did get it from elsewhere, they don't know what they are talking about.
  1. In SUSY, the SM Higgs sector has at least five particles.
  2. There are therefore five SUSY partners.
  3. These particles mix with gauginos, so in general there is no particle that is a pure "higgsino".
  4. Obviously then a statement about mass is meaningless.
 
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hyksos said:
Supersymmetric partners are expected to only pair off with "fundamental" particles of the Standard Model. (photon, W, Z, gluons, leptons, quarks, graviton). In all those canonical particles, the SUSY partner is significantly more massive than its counterpart.

Internet sources suggest that unofficial name of the supersymmetric partner to the Higgs is the "Higgsino". Unlike the rest of the particle pantheon, the Higgsino should be significantly less massive than the Higgs boson.

Please give specific references for these claims; "Internet sources" is not enough.
 
PeterDonis said:
Please give specific references for these claims; "Internet sources" is not enough.
Roger Penrose has claimed that spin-0 particles would in all cases be more massive than their superpartners. This would also include the Higgs being more massive than its superpartner, the Higgsino, ( as the Higgs is spin-0. ) He seems to imply that this follows from the non-existence of negative spin.

This claim appears on page 875, chapter 31, section 2 of the following book.

The Road to Reality A Complete Guide to the Laws of the Universe.
Vintage; Reprint edition (January 9, 2007)
ISBN-10: 0679776311
ISBN-13: 978-0679776314
 
hyksos said:
This claim appears on page 875, chapter 31, section 2 of the following book.

This is a pop science book, not a textbook or peer-reviewed paper. As such, it is not a valid source for PF discussion.

Thread closed.
 
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