"A new relativistic theory for Modified Newtonian Dynamics", Constantinos Skordis, Tom Złosnik, The MOND theory claimed that it can reproduce the CMB power spectrum for the first time. It needs to be confirmed by other astrophysicist.
"Hadronic Light-by-Light Scattering Contribution to the Muon Anomalous Magnetic Moment from Lattice QCD", Phys. Rev. Lett. 124, 132002, April 2020. "Our value is consistent with previous model results and leaves little room for this notoriously difficult hadronic contribution to explain the difference between the standard model and the BNL experiment."
"Improved Limit on Neutrinoless Double-Beta Decay in Te-130 with CUORE", Phys. Rev. Lett. 124, 122501, March 2020. CUORE updated their limit as 3.2x10^25 years for Te-130 neutrino less double beta decay half-life. The limit range of corresponding effective Majorana mass is 75-350 meV.
"Constraint on the Matter-Antimatter Symmetry-Violating Phase in Neutrino Oscillations", arXiv:1910.03887, first time closed 99.73% (3σ) intervals on the CP-violating phase. −1.89(+0.70,-0.58) for NO, −1.38(+0.48,-0.54) for IO. Published in Nature 580, 339 (2020)
"The dark matter interpretation of the 3.5-keV line is inconsistent with blank-sky observations", Science Vol. 367, Issue 6485, pp. 1465-1467 (2020), Claimed that there is no peak at 3.5 keV in the background spectra.
"Detection of Cross-Correlation between Gravitational Lensing and γ Rays", Phys. Rev. Lett. 124, 101102(2020), Observed a correlation between gamma rays and weak lensing mass distribution. It seems that blazers dominantly cause this correlation. Dark matter interpretation is not clear.
"Search for the rare decay !" → $%&&̅ at J-PARC KOTO experiment", Presentation at KAON2019 conference by Satoshi Shinohara. 4 events are seen for K_L --> Pi0+nu,nubar channel. BSM ? Need to be checked more.
"Annual modulations from secular variations: relaxing DAMA?", arXiv:2002.00459, speculation that DAMA annual modulation may be due to the way analyzing the background data. Maybe not from DM signal. Interesting !
"Early-type Host Galaxies of Type Ia Supernovae. II. Evidence for Luminosity Evolution in Supernova Cosmology", arXiv:1912.04903, A team of Yonsei U. led by Young-Wook Lee claims that dark energy is not real ! But the data are questioned.