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Matteo Cadeddu

@MatteoCadeddu22

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Astroparticle physicist @INFN. I play with neutrinos, dark matter and nuclear physics. Part of the DarkSide & DEAP Collaborations. Otherwise I play drums ;)

Joined July 2012
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@MatteoCadeddu22
Matteo Cadeddu
14 days
So XKCD’s comic is not wrong (at least for now). Stay tuned for future works, we still have one final idea to test that might flip the script sooner than you’d think. 😉.6/6
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@MatteoCadeddu22
Matteo Cadeddu
14 days
Good news: every cross‑check -exact wave functions, ⁷¹Ge half‑life new average, excited‑state contributions- pulls the same way. The anomaly survives no matter what. So, (un)fortunately: the #gallium #anomaly remains one of the coolest #unsolved puzzles in #neutrino physics! 5/N.
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@MatteoCadeddu22
Matteo Cadeddu
14 days
That gap turns into a solid 6σ deficit. In stats speak: less than one‑in‑billion it’s just a fluke. Tried the usual “one extra #sterile #neutrino” fit. It now needs mixing angles that clash hard with solar data and #KATRIN. Steriles are sweating. 😬.4/N.
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@MatteoCadeddu22
Matteo Cadeddu
14 days
Upgrade #2 ->We averaged those wave‑functions over the Ge charge density. Bye‑bye guesswork on nuclear size. Net effect: the predicted capture rate climbs ≈6% above the previous value, and now sits ~20% higher than what GALLEX + SAGE + BEST experiments actually saw. 3/N.
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@MatteoCadeddu22
Matteo Cadeddu
14 days
👇Two theses, countless debug sessions and more coffee than neutrinos later, we finally re‑built the whole νₑ+⁷¹Ga story from scratch. Upgrade #1 We solved the exact Dirac‑Coulomb equation for the outgoing electron. No more leading order shortcuts 2/N.
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arxiv.org
The gallium anomaly, a persistent discrepancy exceeding $4σ$ in the $^{71}$Ga neutrino capture rates from $^{51}$Cr and $^{37}$Ar calibration sources by the GALLEX, SAGE, and recently BEST...
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@MatteoCadeddu22
Matteo Cadeddu
14 days
The new @xkcdComic says the #gallium #anomaly is still a head‑scratcher. Challenge accepted! Let me tell you what we just posted on arXiv today!.(1/N).
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xkcd.com
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@MatteoCadeddu22
Matteo Cadeddu
4 months
Neutrinos continue to surprise us — but our analysis shows the Standard Model still holds strong, even under scrutiny from diverse scattering data. Check it out 👇 #neutrinos #CEvNS 5/5.
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arxiv.org
The Standard Model (SM) of particle physics effectively explains most observed phenomena, though some anomalies, especially in the neutrino sector, suggest the need for extensions. In this work,...
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@MatteoCadeddu22
Matteo Cadeddu
4 months
An interesting outcome: we find two allowed solutions for the neutrino-electron couplings — one near the SM, and a degenerate solution that's actually favored by the data. But upcoming dark matter detectors might finally break this degeneracy. #physics #globalfit 4/5
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@MatteoCadeddu22
Matteo Cadeddu
4 months
Our global fit yields updated bounds on the vector and axial-vector couplings of neutrinos. We carefully account for flavor- and momentum-dependent effects, key for avoiding wrong conclusions in the era of precision neutrino physics. #neutrino #StandardModel 3/5
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@MatteoCadeddu22
Matteo Cadeddu
4 months
We put the neutrino charge radius to the test! No large deviations from the SM found for electron & muon neutrinos. But for tau neutrinos, we now set the strongest constraints ever from scattering data — thanks to solar neutrinos in DM detectors!.#neutrino #DarkMatter 2/5
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@MatteoCadeddu22
Matteo Cadeddu
4 months
Proud to share our latest work where we test the Standard Model using #neutrinos, nature’s most elusive messengers. This is the first global fit combining neutrino-nucleus (#CEvNS) and neutrino-electron scattering data in a consistent framework. 1/5.
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arxiv.org
The Standard Model (SM) of particle physics effectively explains most observed phenomena, though some anomalies, especially in the neutrino sector, suggest the need for extensions. In this work,...
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@MatteoCadeddu22
Matteo Cadeddu
6 months
We have analyzed #CONUS+ data from the observation of #CEvNS with reactor #anti #neutrinos to extract insights into both #SM and #BSM physics. A new era has started where the complementarity with #COHERENT's observations at the SNS will be fully exploited!
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arxiv.org
Coherent elastic neutrino-nucleus scattering (CE$ν$NS) is a key process for probing Standard Model and beyond the Standard Model (BSM) properties. Following its first detection by the COHERENT...
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@MatteoCadeddu22
Matteo Cadeddu
1 year
Published on @PhysRevD "Refined determination of the weak mixing angle at low energy". We perform a global fit of all available weak probes i.e. #atomic #parity #violation, #CEvNS and parity-violating electron scattering. Spoiler: Standard Model rulez😅.
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@MatteoCadeddu22
Matteo Cadeddu
1 year
RT @epl_journal: FREE TO READ - PERSPECTIVE - OPEN ACCESS: A view of coherent elastic neutrino-nucleus scattering by M. Cadeddu (@MatteoCad….
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@MatteoCadeddu22
Matteo Cadeddu
1 year
Published on JHEP🥳.Momentum dependent flavor radiative corrections to the coherent elastic #neutrino-nucleus scattering for the neutrino charge-radius determination. With @NCargioli @MattiAtzoCorona @DordeiFrancesca & Carlo Giunti
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@MatteoCadeddu22
Matteo Cadeddu
1 year
Published on Physics Letters B 🙂."On the impact of the #Migdal effect in reactor #CEνNS experiments". Migdal contribution is negligible for energies <0.3 keV where the signal is detectable! @ElsevierPhysics @NCargioli @MattiAtzoCorona @DordeiFrancesca.
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@MatteoCadeddu22
Matteo Cadeddu
1 year
RT @nuarxiv: 📌 "Momentum dependent flavor radiative corrections to the coherent elastic neutrino-nucleus scattering for the neutrino charge….
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@MatteoCadeddu22
Matteo Cadeddu
2 years
Amazing new result from g-2 Collaboration on the anomalous muon magnetic moment just released!!. #Muongminus2 #g-2 #standardmodel #muon #magneticmoment
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