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NEMO-3 hunts for ultra-rare beta decay

Search for new type of lepton-number violation draws a blank
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Higgs decays to photon pairs!

Academics / Physics : A Quantum Diaries Survivor

It was with great pleasure that I found yesterday, in the public page of the DZERO analyses, a report on their new search for Higgs boson decays to photon pairs. On that quite rare decay process -along with another not trivial decay...

CDF gets first glimpse of legendary rare decay

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The CDF collaboration at Fermilab got a glimpse recently of a rare decay process that scientists have searched for years. Its rate appears to be slightly larger than expected, which could indicate new physics. The collaboration’s mo...

The Helium Dilution Refrigerator in CUORE

Academics / Physics : Quantum Diaries

CUORE is looking for a kind of radioactive decay that's extremely rare -- if indeed it happens at all. It's never been observed before. It's called "neutrinoless double beta decay," a decay emitting two electrons but no neutrinos. T...

A challenge to lepton universality in B-meson decays

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One of the key assumptions of the standard model of particle physics is that the interactions of the charged leptons, namely electrons, muons and taus, differ only because of their different masses. Whereas precision tests comparing...

CMS: Higgs to mu tau is going away

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One interesting anomaly in the LHC run-1 was a hint of Higgs boson decays to a muon and a tau lepton. Such process is forbidden in the Standard Model by the conservation of muon and tau lepton numbers. Neutrino masses violate indivi...


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