TY - JOUR
T1 - Fermions and the Swampland
AU - Palti, Eran
N1 - Publisher Copyright:
© 2020 The Author(s)
PY - 2020/9/10
Y1 - 2020/9/10
N2 - In this note we consider whether there could be Swampland constraints associated to the presence of fermions in the theory. We propose that any fermion must couple to an infinite tower of states, and that the mass scale of this tower, in Planck units, is set by the strength of the Yukawa coupling to the tower. This is a type of fermionic version of the (magnetic) Weak Gravity Conjecture. We also find that supersymmetry plays a natural part in this fermionic realisation, which motivates a further proposal that supersymmetry can only be broken below the scale set by this Yukawa coupling. We perform some preliminary checks in string theory of these ideas.
AB - In this note we consider whether there could be Swampland constraints associated to the presence of fermions in the theory. We propose that any fermion must couple to an infinite tower of states, and that the mass scale of this tower, in Planck units, is set by the strength of the Yukawa coupling to the tower. This is a type of fermionic version of the (magnetic) Weak Gravity Conjecture. We also find that supersymmetry plays a natural part in this fermionic realisation, which motivates a further proposal that supersymmetry can only be broken below the scale set by this Yukawa coupling. We perform some preliminary checks in string theory of these ideas.
UR - http://www.scopus.com/inward/record.url?scp=85087957799&partnerID=8YFLogxK
U2 - 10.1016/j.physletb.2020.135617
DO - 10.1016/j.physletb.2020.135617
M3 - Article
AN - SCOPUS:85087957799
SN - 0370-2693
VL - 808
JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
M1 - 135617
ER -