Muons Defy Standard Model: New Physics Effects Suggested

  • Thread starter Thread starter Guybrush Threepwood
  • Start date Start date
Guybrush Threepwood
Messages
511
Reaction score
1
Muons continue to defy Standard Model

"The recent g-2 result strengthens the case for new physics effects, with supersymmetry a leading candidate, but it is by no means definitive," says William Marciano, a theorist at Brookhaven. "Continued scrutiny of theory and further running of the experiment are imperative."
 
Physics news on Phys.org
It's still not at 3\sigma...

Nevertheless, it's quite interesting and exciting.
 
I've been watching these developments since the earlier Brookhaven announcement. What I've seen so far is that the calculation of this quantity is still in a very unsettled state. Depending on whose doing it, the results can be anywhere from a fraction to several standard deviations off from the experiment. Until the theoreticians can come to some sort of agreement, the jury is still out.
 
Thread 'Why is there such a difference between the total cross-section data? (simulation vs. experiment)'

Thread 'Why is there such a difference between the total cross-section data? (simulation vs. experiment)'

Well, I'm simulating a neutron-proton scattering phase shift. The equation that I solve numerically is the Phase function method and is $$ \frac{d}{dr}[\delta_{i+1}] = \frac{2\mu}{\hbar^2}\frac{V(r)}{k^2}\sin(kr + \delta_i)$$ ##\delta_i## is the phase shift for triplet and singlet state, ##\mu## is the reduced mass for neutron-proton, ##k=\sqrt{2\mu E_{cm}/\hbar^2}## is the wave number and ##V(r)## is the potential of interaction like Yukawa, Wood-Saxon, Square well potential, etc. I first...
View full post »

Thread 'Toponium Discovered'

Toponium is a hadron which is the bound state of a valance top quark and a valance antitop quark. Oversimplified presentations often state that top quarks don't form hadrons, because they decay to bottom quarks extremely rapidly after they are created, leaving no time to form a hadron. And, the vast majority of the time, this is true. But, the lifetime of a top quark is only an average lifetime. Sometimes it decays faster and sometimes it decays slower. In the highly improbable case that...
View full post »

Thread 'Dirac-Delta from Normalization of Continuous Eigenfunctions'

I'm following this paper by Kitaev on SL(2,R) representations and I'm having a problem in the normalization of the continuous eigenfunctions (eqs. (67)-(70)), which satisfy \langle f_s | f_{s'} \rangle = \int_{0}^{1} \frac{2}{(1-u)^2} f_s(u)^* f_{s'}(u) \, du. \tag{67} The singular contribution of the integral arises at the endpoint u=1 of the integral, and in the limit u \to 1, the function f_s(u) takes on the form f_s(u) \approx a_s (1-u)^{1/2 + i s} + a_s^* (1-u)^{1/2 - i s}. \tag{70}...
View full post »

Similar threads

I Does the New Muon g-2 Measurement Indicate Physics Beyond the Standard Model?
Replies
2
Views
2K
I New muon g-2 calculation consistent with experiment
Replies
0
Views
3K
I Progress In Calculating The HLbL Contribution To Muon g-2
Replies
0
Views
2K
B What's Delaying Fermilab's Muon g-2 Results Release?
2
Replies
96
Views
13K
A Possible explanation for muon g-2 anomaly: Gravity?
2
Replies
83
Views
14K
I ATLAS and CMS see signs of Higgs->muons decay
Replies
17
Views
6K
I B -> s µµ decays: Current status
Replies
49
Views
12K
A What is the significance of the Cabibbo Angle Anomaly in particle physics?
Replies
4
Views
2K
I Muon g-2 as a constraint on new physics
Replies
18
Views
4K
I Is this thesis a plausible explanation for muon weirdness?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top