Drivability and Performance of Steel H-Piles in Schist Saprolite

Dark Matter Particle Explorer observations of high-energy cosmic ray electrons plus positrons and their physical implications

“…A general requirement is that DM particles should couple with electrons (leptons) instead of quarks. A simple extension is to add a U(1) X symmetry to the standard model, and the DM annihilate into electrons (leptons) via the new gauge boson mediator, e.g., a Z ′ [95][96][97][98][99][100][101][102][103][121][122][123][124]. In the fermion DM case, the Dirac type is more natural as its cross section is s-wave dominant for the s-channel annihilation process χχ → Z ′ → ff .…”

“…Also several bosonic DM models were developed with different Higgs potentials and Yukawa terms. Some of such models are realized in different kinds of seesaw models [95,99,104,105,124,125]. Other attempts include the lepton portal DM model in which DM particles interact with standard model particles through mediators with lepton numbers [69,107], or the lepton-flavored DM model in which DM particles carry lepton numbers themselves [108].…”

“…Other attempts include the lepton portal DM model in which DM particles interact with standard model particles through mediators with lepton numbers [69,107], or the lepton-flavored DM model in which DM particles carry lepton numbers themselves [108]. The singlet scalar DM model [111], higgs triplet with vector DM model [127], graviton-mediated DM model [113], Quasi-degenerate DM model [112], lepton-specific interaction DM model [128], and left-right symmetric scalar DM model [117] were also presented.…”