B ORNL Detects Never Before Seen Neutrino Interactions

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I don't see the "monumental" advancement. It is a great measurement, but it is not surprising. It is a nice demonstration what future detectors will have as background.
This process will ultimately slow down future improvements of dark matter detectors because the neutrino recoils are indistinguishable from dark matter recoils. DARWIN plans to reach this limit somewhere between 2025-2030. With natural neutrinos, not with a focused neutrino beam from accelerators. I wrote a bit about dark matter detectors in this Insight article.
 
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...
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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