Sleptons Inwards Antarctica: 5-Sigma Prove For Stau-Like High Unloose Energy Terrestrial Rays

As Jitter pointed out, an extremely interesting astro-ph newspaper appeared yesterday:

The ANITA Anomalous Events as Signatures of a Beyond Standard Model Particle, as well as Supporting Observations from IceCube

The newspaper was promoted at Live Science as well as the Science Magazine:

Bizarre Particles Keep Flying Out of Antarctica's Ice, as well as They Might Shatter Modern Physics

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proved that his Motl disclose was at most six. It agency that at that topographic point exists the chain of collaborators Motl-Dine-Farrar-Hogg-Blandford-Hernquist-Sigurdsson.

Now, he's been really of import inwards an actual scientific evolution that is said to furnish us alongside around evidence for supersymmetry.



ANITA, around detector inwards Antarctica, has recorded something similar 2 cosmic rays alongside EeV energies. Just to endure sure, "eV" is the electronvolt as well as "E" stands for "exa" which is i one thou 1000 times "tera" (the thing inwards betwixt is "peta"). So "exa" is \(10^{18}\).

There possess got been other "exa-electronvolt" particles inwards the cosmic rays only honey Houston, nosotros possess got a work here. Cosmic rays should become far from the Cosmos as well as similar Heaven as well as the sky, the Cosmos is above us. Instead, 2 events arrived from the bottom, from the hell, they were going up.

Can cosmic rays penetrate through the globe as well as nation inwards the detector spell going inwards the odd administration "up"? Low-energy cosmic rays sure tin – low-energy neutrinos are almost invisible, similar ghosts. But what almost high release energy neutrinos, similar EeV?



Mr Tau (right) as well as his silent, minor only heavy superpartner.

Well, EeV is way inwards a higher house the electroweak scale, 240 GeV or so, as well as at these high energies, the electroweak symmetry is restored. One of the implications is that neutrinos call back their siblings, the charged leptons – they interact every bit strongly. That actually agency "very strongly". High release energy neutrinos possess got virtually no gamble to penetrate through thousands of kilometers of rock.

Fox et al. tell that the probability of a Standard Model-based explanation for these 2 ANITA events – as well as a few seemingly analogous IceCube results – is below i millionth, i.e. the evidence for the Beyond the Standard Model physics is formally inwards a higher house v sigma.

And they lay a prissy supersymmetric scenario that may explicate the events smoothly. Instead of the conversion of "tau neutrino to tau" (which yet may explicate cosmic rays going from the empty space), they advise that the particle flight through the globe was a stau, the superpartner of the charged tau lepton.

Their stau \(\tilde \tau_R\) – similar inwards around regular GMSB (gauge-mediated supersymmetry breaking) models – is the NLSP (next-to-lightest superpartner), it is rather long-lived, as well as (when it hits a nucleon, it) decays to the tau \(\tau\) lepton (the same cease production as if yous possess got the tau neutrino from the heaven) summation the LSP, the genuinely invisible (lightest supersymmetric) particle that is a nighttime affair candidate – belike denoted non as \(\tilde \chi\) only \(\tilde G\) because it should endure a gravitino inwards GMSB.

If yous tin offering an immediate explanation why stau inwards these models is as well as thus weakly interacting to larn through Earth, I volition appreciate yous crash course.



Right now, Fox is hungry for to a greater extent than data. I hateful Derek Fox or the mammal. In the amusement industry, Fox isn't hungry at all as well as it – acting on behalf of Disney – sold its stake inwards Sky to a hungry Comcast.