# All Upcoming Events

On Tuesday, October 11, at 12:00 in L4, a seminar in
the Quantum Field Theory series:

Ian Strachan (Glasgow)

tt*-geometry and Hermitian structures on the big phase space

*The big phase space is an infinite dimensional manifold which is the arena for topological quantum field theories and quantum cohomology (or equivalently, dispersive integrable systems). tt*-geometry was introduced by Cecotti and Vafa and is a way to introduce an Hermitian structure on what would be naturally complex objects, and the theory has many links with singularity theory, variation of Hodge structures, Higgs bundles, integrable systems etc.. In this talk the two ideas will be combined to give a tt*-geometry on the big phase space. (joint work with Liana David)*

**Further information:**
On Thursday, October 13, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Particle Theory Group (Oxford)

Introductions

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**Further information:**
On Friday, October 14, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in
the Theoretical Physics Colloquia series:

Giulia Zanderighi (Oxford)

Precision Higgs studies at the LHC

On Monday, October 17, at 14:15 in L4, a seminar in
the Geometry and Analysis series:

Jason Lotay (UCL)

TBA

On Tuesday, October 18, at 12:00 in L4, a seminar in
the Quantum Field Theory series:

Mikhail Kompaniets (St Petersburg State University)

to be announced

On Thursday, October 20, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Jean-Michel Alimi (Observatoire de Paris-Meudon)

Dark universe simulation

On Tuesday, October 25, at 12:00 in L4, a seminar in
the Quantum Field Theory series:

Robert Schabinger (Trinity College Dublin)

On The Four-Loop Form Factors Of Massless QCD

*In this talk, we discuss an ongoing calculation of the four-loop form factors in massless QCD. We begin by discussing our novel approach to the calculation in detail. Of particular interest are a new polynomial-time integration by parts reduction algorithm and a new method to algebraically resolve the IR and UV singularities of dimensionally-regulated bare perturbative scattering amplitudes. Although not all integral topologies are linearly reducible for the more non-trivial color structures, it is nevertheless feasible to obtain accurate numerical results for the finite parts of the complete four-loop form factors using publicly available sector decomposition programs and bases of finite integrals. Finally, we present first results for the four-loop gluon form factor Feynman diagrams which contain three closed fermion loops.*

**Further information:**
On Thursday, October 27, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

(special talk on gravitational waves) (TBA)

No seminar today

On Friday, October 28, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in
the Theoretical Physics Colloquia series:

Matthias Troyer (Zurich)

tba

On Tuesday, November 1, at 12:00 in L5, a seminar in
the Relativity series:

Paul Fendley (Oxford)

TBA

On Thursday, November 3, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

(Cosener's meeting on LHC) (various speakers)

No seminar today

On Monday, November 7, at 14:15 in L4, a seminar in
the Geometry and Analysis series:

Felix Schulze (UCL)

On short-time existence for mean curvature flow of surface clusters with triple edges

*We will discuss two recent short-time existence results for (1) mean curvature of surface clusters, where n-dimensional surfaces in R^{n+k}, are allowed to meet at equal angles along smooth edges, and (2) for planar networks, where curves are initially allowed to meet in multiple junctions that resolve immediately into triple junctions with equal angles. The first result, which is joint work with B. White, follows from an elliptic regularisation scheme, together with a local regularity result for flows with triple junctions, which are close to a static flow of the half-planes. The second result, which is joint work with T. Ilmanen and A.Neves, relies on a monotonicity formula for expanding solutions and a local regularity result for the network flow.*

**Further information:**
On Thursday, November 10, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Fabio Maltoni (Universit� Catholique de Louvain)

TBA

On Friday, November 11, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in
the Theoretical Physics Colloquia series:

Ignacio Cirac (Max Planck)

tba

On Monday, November 14, at 14:15 in L4, a seminar in
the Geometry and Analysis series:

Brent Pym (Oxford)

TBA

On Thursday, November 17, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Matt McCullough (CERN)

A clockwork theory

On Monday, November 21, at 14:15 in L4, a seminar in
the Geometry and Analysis series:

Mark McLean (Stony Brook)

TBA

On Thursday, November 24, at 15:30 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

various speakers (Note unusual time)

MikeFest: gauge theory on the lattice

On Friday, November 25, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in
the Theoretical Physics Colloquia series:

Steve Balbus (Oxford)

A simple approach to gravitational radiation and its back reaction

On Monday, November 28, at 14:15 in L4, a seminar in
the Geometry and Analysis series:

Ruxandra Moraru (Waterloo)

TBA

On Tuesday, November 29, at 15:45 in L4, a seminar in
the Algebraic and Symplectic Geometry series:

Kim Moore (Cambridge)

TBA

On Thursday, December 1, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Fernando Marchesano (Instituto de F�sica Te�rica, Madrid)

F-theory

On Friday, December 2, at 16:00 in L1, a seminar in
the Math Colloquium series:

Caroline Series (University of Warwick)

tba

On Friday, February 10, at 16:00 in L1, a seminar in
the Math Colloquium series:

Eitan Tadmor (University of Maryland)

tba

*tba*

**Further information:**
On Friday, March 3, at 16:00 in L1, a seminar in
the Math Colloquium series:

Ana Caraiani (University of Bonn)

tba

On Friday, April 28, at 16:00 in L1, a seminar in
the Math Colloquium series:

Catharina Stroppel (University of Bonn)

tba