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#3

The strange and flavor-singlet axial form factors of the nucleon from lattice QCD

Alessandro Barone, Dalibor Djukanovic, Georg von Hippel et al. 2026-05-07

The singlet axial form factor of the nucleon provides essential input for a complete understanding of the nucleon axial structure. Together with the isovector and isoscalar octet channels, in the forward limit it forms the basis for a full flavor decomposition of the proton spin. In this work we pre

#4

The temporal distribution of SN1987A neutrino events

Riccardo Maria Bozza, Vigilante di Risi, Veronica Oliviero et al. 2026-05-07

The interpretation of the SN1987A neutrino data continues to be hindered by significant absolute timing uncertainties and a well-known tension in the angular distributions. We perform a quantitative, high-precision alignment of the Kamiokande-II and Baksan data with the IMB clock, using for the firs

#5

Kaon Portal to Freeze-in Dark Matter

Motoi Endo, Takumu Yamanaka 2026-05-07

We investigate freeze-in production of light dark matter through the quark flavor-changing operator $(\bar{s}γ_μd)(\barχγ^μχ)$ in a low-reheating cosmology. For reheating temperatures below the QCD crossover, kaon decays and scatterings generate the dark matter abundance through $K\toπχ\barχ$ and $K

#7

Constraints on the inflationary vacuum and reheating era from NANOGrav

Debtosh Chowdhury, Rounak Nath, Sudipta Show 2026-05-06

NANOGrav and various pulsar timing array experiments recently reported evidence for a common red noise signal across millisecond pulsars. This signal exhibits Hellings-Downs inter-pulsar correlation patterns, providing compelling evidence for a stochastic gravitational wave background (SGWB) signal.

#8

The $T_{bc}$ tetraquarks near the $B\bar{D}$ threshold

Halil Mutuk 2026-05-06

We study the doubly heavy open-flavor tetraquarks $T_{bc}^{(0)}$ ($J^{P}=0^{+}$) and $T_{bc}^{(1)}$ ($J^{P}=1^{+}$) in the dynamical diquark model, describing the system as a heavy antidiquark--light diquark pair interacting through the lattice-QCD $Σ_g^+(1S)$ Born--Oppenheimer potential. Solving th