1,056 research outputs found
Evaluating beyond the metrics: understanding the value of participatory arts through plurality of voice
This thesis investigates the potentialities of holistic and participant-centric approaches to evaluating the social impact of participatory arts programmes. The current framing of the social impact of the arts is problematised through exploration of existing discourse, before interrogating principles and methods from ethnographic and reflexive research, drawing upon Freirean pedagogy and constructivist approaches to knowledge generation. I consider how the binary of top-down instrumentalised evaluation frameworks and bottom-up approaches can be disrupted, to build a stronger knowledge base of social impact of participatory arts engagement. Through a critical case study of Lyric Hammersmith Theatre’s work with young people, with a focus on its START programme for participants not in education, employment or training, this thesis invites participants to be the knowledge holders and changemakers of their lives. Through the exploration of pluralistic experience and emerging outcomes, I move towards defining impact, and placing ownership of change with participants, as a result of participation. My research contributes to the current discourse on the evidence base and value of participation in the arts and to emerging evaluation methodologies. The findings which emerge through this research, humanise and celebrate both the individual and collective experience. Finally, this thesis proposes a new conceptual framework for evaluating the impact of participatory arts programmes and understanding change, underpinned by friendship, with-ness, and hope
Violation from String Theory
We identify a natural way to embed symmetry and its violation
in string theory. The symmetry of the low energy effective
theory is broken by the presence of heavy string modes.
violation is the result of an interplay of and flavor symmetry.
violating decays of the heavy modes could originate a
cosmological matter-antimatter asymmetry.Comment: 7 pages, 4 figure
Exploring the SO(32) Heterotic String
We give a complete classification of Z_N orbifold compactification of the
heterotic SO(32) string theory and show its potential for realistic model
building. The appearance of spinor representations of SO(2n) groups is analyzed
in detail. We conclude that the heterotic SO(32) string constitutes an
interesting part of the string landscape both in view of model constructions
and the question of heterotic-type I duality.Comment: 21 pages, 5 figure
Unification of Flavor, CP, and Modular Symmetries
Flavor symmetry plays a crucial role in the standard model of particle
physics but its origin is still unknown. We develop a new method (based on
outer automorphisms of the Narain space group) to determine flavor symmetries
within compactified string theory. A picture emerges where traditional
(discrete) flavor symmetries, CP-like symmetries and modular symmetries (like
T-duality) of string theory combine to unified flavor symmetries. The groups
depend on the geometry of compact space and the geographical location of fields
in the extra dimensions. We observe a phenomenon of "local flavor groups" with
potentially different flavor symmetries for the various sectors of quarks and
leptons. This should allow interesting connections to existing bottom-up
attempts in flavor model building.Comment: 18 pages, 3 figures; v2: minor changes, version accepted by PL
A note on discrete R symmetries in Z6-II orbifolds with Wilson lines
We re-derive the R symmetries for the Z6-II orbifold with non-trivial Wilson
lines and find expressions for the R charges which differ from those in the
literature.Comment: 13 pages, 3 figure
Small SUSY phases in string-inspired supergravity
In supersymmetric models, there are new CP violating phases which, if
unsuppressed, would give a too large neutron electric dipole moment. We examine
the possibility of small SUSY phases in string-inspired supergravity models in
which supersymmetry is broken by the auxiliary components of the dilaton and
moduli superfields. It is found that the SUSY phases can be suppressed by a
small factor governing the breakdown of the approximate Peccei Quinn symmetries
nonlinearly realized for the moduli superfields that participate in
supersymmetry breaking. In many cases, the symmetry breaking factors are
exponentially small for moderately large values of the moduli, leading to small
phase values in a natural way.Comment: 15pages, Latex, SNUTP 93-8
Stability of flux compactifications and the pattern of supersymmetry breaking
We extend the KKLT approach to moduli stabilization by including the dilaton
and the complex structure moduli into the effective supergravity theory.
Decoupling of the dilaton is neither always possible nor necessary for the
existence of stable minima with zero (or positive) cosmological constant. The
pattern of supersymmetry breaking can be much richer than in the decoupling
scenario of KKLT.Comment: References adde
Possible astrophysical signatures of heavy stable neutral relics in supergravity models
We consider heavy stable neutral particles in the context of supergravity and
show that a gravitationally suppressed inflaton decay can produce such
particles in cosmologically interesting abundances within a wide mass range
. In gravity-mediated
supersymmetry breaking models, a heavy particle can decay into its superpartner
and a photon-photino pair or a gravitino. Such decays only change the identity
of a possible dark matter candidate. However, for , astrophysical bounds from gamma-ray background and
photodissociation of light elements can be more stringent than the overclosure
bound, thus ruling out the particle as a dark matter candidate.Comment: 12 page
Low Energy Supersymmetry from the Heterotic Landscape
We study possible correlations between properties of the observable and
hidden sectors in heterotic string theory. Specifically, we analyze the case of
the Z6-II orbifold compactification which produces a significant number of
models with the spectrum of the supersymmetric standard model. We find that
requiring realistic features does affect the hidden sector such that hidden
sector gauge group factors SU(4) and SO(8) are favoured. In the context of
gaugino condensation, this implies low energy supersymmetry breaking.Comment: 4 pages, 3 figures; to appear in Phys. Rev. Let
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