massless

adj.

无质量的；

1. For example, it should be massless since the range of gravity is infinite.
   比如，由于引力的作用范围是无限的，那引力子应该是无质量的。

Exactly massless quarks on the lattice
Massless black holes and conifolds in string theory
Quantum Transport of Massless Dirac Fermions
More about exactly massless quarks on the lattice
Global Conservation Laws and Massless Particles
Two-dimensional gas of massless Dirac fermions in graphene.
Spontaneous Symmetry Breakdown without Massless Bosons
Anisotropic behaviours of massless Dirac fermions in graphene under periodic potentials
Nonlinear equations for symmetric massless higher spin fields in $({rm A}){rm dS}sb d$.
Universality and scaling in gravitational collapse of a massless scalar field