573 research outputs found
Developments over the last 60Â years in diffuse large B-cell lymphomas
At the time of the formation of the British Society of Haematology diffuse large B-cell lymphoma was not recognised
as a specific entity and was included in the category of ‘large
cell’ or ‘aggressive’ lymphomas. These were fatal in 95% of
cases. Today the cure rate in adults entered into clinical trials
is ~70% and a large number of British physicians have contributed to this progress
Chern-Simons Actions and Their Gaugings in 4D, N=1 Superspace
We gauge the abelian hierarchy of tensor fields in 4D by a Lie algebra. The
resulting non-abelian tensor hierarchy can be interpreted via an equivariant
chain complex. We lift this structure to N=1 superspace by constructing
superfield analogs for the tensor fields, along with covariant superfield
strengths. Next we construct Chern-Simons actions, for both the bosonic and N=1
cases, and note that the condition of gauge invariance can be presented
cohomologically. Finally, we provide an explicit realization of these
structures by dimensional reduction, for example by reducing the three-form of
eleven-dimensional supergravity into a superspace with manifest 4D, N=1
supersymmetry.Comment: 40pp, v2 added reference
Abelian Tensor Hierarchy in 4D, N=1 Superspace
With the goal of constructing the supersymmetric action for all fields,
massless and massive, obtained by Kaluza-Klein compactification from type II
theory or M-theory in a closed form, we embed the (Abelian) tensor hierarchy of
p-forms in four-dimensional, N=1 superspace and construct its Chern-Simons-like
invariants. When specialized to the case in which the tensors arise from a
higher-dimensional theory, the invariants may be interpreted as
higher-dimensional Chern-Simons forms reduced to four dimensions. As an
application of the formalism, we construct the eleven-dimensional Chern-Simons
form in terms of four-dimensional, N=1 superfields.Comment: 31 page
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