Results 1 to 10 of about 905,673 (386)
Composite Accidental Axions [PDF]
We present several models where the QCD axion arises accidentally. Confining gauge theories can generate axion candidates whose properties are uniquely determined by the quantum numbers of the new fermions under the Standard Model. The Peccei-Quinn symmetry can emerge accidentally if the gauge theory is chiral. We generalise previous constructions in a
M. Redi, R. Sato
arxiv +6 more sources
Accidental degeneracy and topological phase transitions in two-dimensional core-shell dielectric photonic crystals [PDF]
A simple core-shell two-dimensional photonic crystal is studied where the triangle lattice symmetry and $C_{6v}$ rotation symmetry leads to rich physics in the study of accidental degeneracy's in photonic bands. We systematically evaluate different types of accidental nodal points, depending on the dispersions around them and their topological ...
Lin Xu+4 more
arxiv +3 more sources
Accidental Dark Matter: Case in the Scale Invariant Local $B-L$ Models [PDF]
We explore the idea of accidental dark matter (aDM) stability in the scale invariant local $U(1)_{B-L}$ model, which is a theory for neutrino and at the same time radiatively breaks scale invariance via quantum mechanical dynamics in the $U(1)_{B-L}$ sector. A real singlet scalar can be accidental DM with an accidental $Z_2$, by virtue of both extended
Jun Guo+3 more
arxiv +3 more sources
Accidental Symmetries in the 2HDMEFT [PDF]
We construct accidentally symmetric potentials in the framework of Two Higgs Model Effective Field Theory (2HDMEFT) including higher-order operators of dimension 6 and dimension 8. Our construction is facilitated by an earlier developed technique based on prime invariants.
Birch-Sykes, Callum+3 more
arxiv +5 more sources
Frenal tears: accidental or non-accidental?
Ruixiang Yee+4 more
doaj +4 more sources
Purpose. To assess the frequency, risk factors, and management of accidental durotomy in minimally invasive transforaminal lumbar interbody fusion (MIS TLIF). Methods.
Jan-Helge Klingler+7 more
doaj +2 more sources
Principle of Al-Zati La-Yo’allal (Self-evident essence does not need proof) in View of Imam Khomeini [PDF]
The principle of Al-Zati La-Yo’allal (Self-evident essence does not need proof) is one of the important philosophical doctrines which falls into three philosophical rules.
fatemeh Moosavi Bojnourdi
doaj +1 more source
Accidental Hypothermia: 2021 Update
Accidental hypothermia is an unintentional drop of core temperature below 35 °C. Annually, thousands die of primary hypothermia and an unknown number die of secondary hypothermia worldwide.
P. Paal+7 more
semanticscholar +1 more source