<p>On April 7th, 2021, the muon <span class="math-container">$(g-2)$</span> collaboration published <a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.141801" rel="nofollow noreferrer">Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm</a>, a result which made it to standard news, partly under headlines like <em>Farewell to the <a href="https://en.wikipedia.org/wiki/Standard_Model" rel="nofollow noreferrer">Standard Model</a></em> (German source: <a href="https://www.faz.net/aktuell/wissen/physik-mehr/das-magnetische-moment-des-myons-ist-groesser-als-erwartet-17282319/in-diesem-speicherring-am-17282439.html" rel="nofollow noreferrer"><em>Abschied vom Standardmodell</em></a>)</p>
<p>The following <a href="https://phys.org/news/2021-04-field-argonne-scientists-bolster-evidence.html" rel="nofollow noreferrer">quote from phys.org</a> nicely summarizes what it is in general about:</p>
<blockquote>
<p>The experiment at Brookhaven indicated that g-2 differed from the theoretical prediction by a few parts per million. This miniscule difference hinted at the existence of unknown interactions between the muon and the magnetic field—interactions that could involve new particles or forces.</p>
</blockquote>
<p>I am now wondering if there are <strong>theoretical studies which illuminate what concrete effects a <span class="math-container">$g-2 &gt; 0$</span> would have on astronomy</strong>, as e.g. <a href="https://inspirehep.net/authors/1023749" rel="nofollow noreferrer">Dominik Stöckinger</a> <a href="https://www.zeit.de/wissen/2021-04/teilchenphysik-myons-fermilab-chicago-cern-dominik-stoeckinger-physik/seite-2" rel="nofollow noreferrer">states</a> (translation by me):</p>
<blockquote>
<p>Some variants of supersymmetry, in which so-called superpartner particles also explain dark matter, are no longer tenable by this measurement.</p>
</blockquote>
<h3>Related</h3>
<ul>
<li>An answer to <a href="https://astronomy.stackexchange.com/questions/27582/what-is-the-closest-candidate-for-dark-matter-currently">What is the closest candidate for Dark Matter currently?</a> points out that <a href="https://en.wikipedia.org/wiki/Weakly_interacting_massive_particles" rel="nofollow noreferrer">WIMPS</a> are currently the most appealing candidate for dark matter.</li>
</ul>

CC BY-SA 4.0
2021-04-08T21:52:59.323Z
*cool question!*
uhoh
CC BY-SA 4.0
2021-04-09T06:41:14.293Z
I was not sure how it would be perceived, glad that you like it.
B--rian
<dark-matter><high-energy-astrophysics><particles><muon>
What consequences does a positive muon anomalous magnetic moment have for astronomy?
B--rian
# What consequences does a positive muon anomalous magnetic moment have for astronomy?

(Asked by: username_0 on 2021-04-08)

On April 7th, 2021, the muon $(g-2)$ collaboration published [Measurement of the Positive Muon Anomalous Magnetic Moment to 0.46 ppm](https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.126.141801), a result which made it to standard news, partly under headlines like *Farewell to the [Standard Model](https://en.wikipedia.org/wiki/Standard_Model)* (German source: [*Abschied vom Standardmodell*](https://www.faz.net/aktuell/wissen/physik-mehr/das-magnetische-moment-des-myons-ist-groesser-als-erwartet-17282319/in-diesem-speicherring-am-17282439.html))

The following [quote from phys.org](https://phys.org/news/2021-04-field-argonne-scientists-bolster-evidence.html) nicely summarizes what it is in general about:

> The experiment at Brookhaven indicated that g-2 differed from the theoretical prediction by a few parts per million. This miniscule difference hinted at the existence of unknown interactions between the muon and the magnetic field—interactions that could involve new particles or forces.

I am now wondering if there are **theoretical studies which illuminate what concrete effects a $g-2 > 0$ would have on astronomy**, as e.g. [Dominik Stöckinger](https://inspirehep.net/authors/1023749) [states](https://www.zeit.de/wissen/2021-04/teilchenphysik-myons-fermilab-chicago-cern-dominik-stoeckinger-physik/seite-2) (translation by me):

> Some variants of supersymmetry, in which so-called superpartner particles also explain dark matter, are no longer tenable by this measurement.

### Related

* An answer to [What is the closest candidate for Dark Matter currently?](https://astronomy.stackexchange.com/questions/27582/what-is-the-closest-candidate-for-dark-matter-currently) points out that [WIMPS](https://en.wikipedia.org/wiki/Weakly_interacting_massive_particles) are currently the most appealing candidate for dark matter.

**Tags:** dark-matter, high-energy-astrophysics, particles, muon

> **Comments:**
> **username_1**: *cool question!*  
> **username_0**: I was not sure how it would be perceived, glad that you like it.  

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## 0 answers

