New issue of Symmetry magazine

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David
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Hi all,

Reintroducing myself, this is the David who was active here many years ago when Greg started up physics forums. I've been off buried in other projects for some years but hope to become active again here.

Some people in this forum might find the magazine I run useful and interesting. It's a particle physics/cosmology/astroparticle phys./synchrotron science mag published free by Stanford Linear Accelerator Center and Fermilab.

The latest issue is out on the web today so if you're interested, check it out at:
www.symmetrymagazine.org

The current issue contents page is: www.symmetrymagazine.org/cms/?pid=1000166

Cheers,
David
 
Physics news on Phys.org
Welcome back!
 
Yes, good to "see" you again! :smile:
 
Hello David ! Heard lots about your tireless efforts at fighting off cranks (mostly from Tom and Integral). Welcome back.
 
thanks for the welcome back!
 

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...
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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}...
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