Results 31 to 40 of about 23,553,376 (354)
Group theory factors for Feynman diagrams [PDF]
, 1998 We present algorithms for the group independent reduction of group theory factors of Feynman diagrams. We also give formulas and values for a large number of group invariants in which the group theory factors are expressed.
A. N. SCHELLEKENS +7 more
core +3 more sources
Journal of Combinatorial Theory, Series A, 1974 AbstractA subset S of a group G is said to be a sum-free set if S ∩ (S + S) = ⊘. Such a set is maximal if for every sum-free set T ⊆ G, we have |T| ⩽ |S|. Here, we generalize this concept, defining a sum-free set S to be locally maximal if for every sum free set T such that S ⊆ T ⊆ G, we have S = T.
Street, Anne Penfold +1 more
openaire +3 more sources
The group theory of oxidation [PDF]
Nuclear Physics B, 2003 Dimensional reduction of (super-)gravity theories to 3 dimensions results in sigma models on coset spaces G/H, such as the E_8/SO(16) coset in the bosonic sector of 3 dimensional maximal supergravity. The reverse process, oxidation, is the reconstruction of a higher dimensional gravity theory from a coset sigma model.
openaire +3 more sources
Bootstrapping the (A1, A2) Argyres-Douglas theory
Journal of High Energy Physics, 2018 We apply bootstrap techniques in order to constrain the CFT data of the (A 1 , A 2) Argyres-Douglas theory, which is arguably the simplest of the Argyres-Douglas models.
Martina Cornagliotto +2 more
doaj +1 more source
Bootstrapping line defects with O(2) global symmetry
Journal of High Energy Physics, 2022 We use the numerical bootstrap to study conformal line defects with O(2) global symmetry. Our results are very general and capture in particular conformal line defects originating from bulk CFTs with a continuous global symmetry, which can either be ...
Aleix Gimenez-Grau +3 more
doaj +1 more source
Bootstrapping Coulomb and Higgs branch operators
Journal of High Energy Physics, 2021 We apply the numerical conformal bootstrap to correlators of Coulomb and Higgs branch operators in 4d N $$ \mathcal{N} $$ = 2 superconformal theories. We start by revisiting previous results on single correlators of Coulomb branch operators.
Aleix Gimenez-Grau, Pedro Liendo
doaj +1 more source
Group testing: an information theory perspective [PDF]
Foundations and Trends in Communications and Information Theory, 2019 The group testing problem concerns discovering a small number of defective items within a large population by performing tests on pools of items. A test is positive if the pool contains at least one defective, and negative if it contains no defectives ...
Matthew Aldridge +2 more
semanticscholar +1 more source
Five-loop renormalisation of QCD in covariant gauges
Journal of High Energy Physics, 2017 We present the complete set of vertex, wave function and charge renormalisation constants in QCD in a general simple gauge group and with the complete dependence on the covariant gauge parameter ξ in the minimal subtraction scheme of conventional ...
K. G. Chetyrkin +3 more
doaj +1 more source
European Physical Journal C: Particles and Fields, 2020 We present an improved determination of the strange quark and antiquark parton distribution functions of the proton by means of a global QCD analysis that takes into account a comprehensive set of strangeness-sensitive measurements: charm-tagged cross ...
Ferran Faura +4 more
doaj +1 more source
Four-loop QCD propagators and vertices with one vanishing external momentum
Journal of High Energy Physics, 2017 We have computed the self-energies and a set of three-particle vertex functions for massless QCD at the four-loop level in the M S ¯ $$ \overline{\mathrm{MS}} $$ renormalization scheme.
B. Ruijl +3 more
doaj +1 more source