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- Nick Evans, Clifford V. Johnson, Michela Petrini
- 2000

We study the family of ten dimensional type IIB supergravity solutions corresponding to renormalisation group flows from N = 4 to N = 2 supersymmetric SU (N) Yang–Mills theory. Part of the solution set corresponds to a submanifold of the Coulomb branch of the gauge theory, and we use a D3–brane probe to uncover details of this physics. At generic places… (More)

Recently, a D–brane construction in type IIA string theory was shown to yield the elec-tric/magnetic duality of four dimensional N =1 supersymmetric U (N c) gauge theories with N f flavours of quark. We present here an extension of that construction which yields the electric/magnetic duality for the SO(N c) and U Sp(N c) gauge theories with N f quarks, by… (More)

We review recent progress in studying mesons within gauge/gravity duality, in the context of adding flavour degrees of freedom to generalizations of the AdS/CFT correspondence. Our main focus is on the 'top-down approach' of considering models constructed within string theory. We explain the string-theoretical constructions in detail, aiming at… (More)

- RACHEL NORDLINGER, LOUISA SADLER, +8 authors Lesley Stirling
- 2003

- Nick Evans
- 2002

We study non-supersymmetric fermion mass and condensate deformations of the AdS/CFT Correspondence. The 5 dimensional supergravity flows are lifted to a complete and remarkably simple 10 dimensional background. A brane probe analysis shows that when all the fermions have an equal mass a positive mass is generated for all six scalar fields leaving… (More)

We describe a ten dimensional supergravity geometry which is dual to a gauge theory that is non-supersymmetric Yang Mills in the infra-red but reverts to N=4 super Yang Mills in the ultraviolet. A brane probe of the geometry shows that the scalar potential of the gauge theory is stable. We discuss the infra-red behaviour of the solution. The geometry… (More)

The triviality of the scalar sector of the standard one-doublet Higgs model implies that this model is only an effective low-energy theory valid below some cutoff scale Λ. For a heavy higgs this scale must be relatively low (10 TeV or less). Additional interactions coming from the underlying theory, and suppressed by the scale Λ, give rise to… (More)

Much epidemiological evidence has linked low birthweight with late cardiovascular risk. We measured aortic wall thickness (a marker of early atherosclerosis) by ultrasonography in 25 newborn babies with intrauterine growth restriction and 25 with normal birthweight. Maximum aortic thicknesses were significantly higher in the babies with intrauterine growth… (More)

- Nick Evans
- 2004

We study the low energy dynamics of pions in a gravity dual of chiral symmetry breaking. The string theory construction consists of a probe D7 brane in the Constable Myers non-supersymmetric background, which has been shown to describe chiral symmetry breaking in the pattern of QCD. We

- Nick Evans, Jon Shock, Tom Waterson
- 2005

We study the embedding of D7 brane probes in five geometries that are deformations of AdS 5 × S 5. Each case corresponds to the inclusion of quark fields in a dual gauge theory where we are interested in investigating whether chiral symmetry breaking occurs. We use a supersymmetric geometry describing an N = 2 theory on its moduli space and a dilaton driven… (More)