# All Upcoming Events

On Monday at 12:00 in L5, a seminar in
the String Theory series:

Jose Edelstein (Santiago de Compostela)

Causality constraints on the graviton 3-point vertex

**Further information:**I will consider higher derivative corrections to the graviton 3-point coupling within a weakly coupled theory of gravity. Lorentz invariance allows further structures beyond that of Einstein’s theory. I will argue that these structures are constrained by causality, and show that the problem cannot be fixed by adding conventional particles with spins J ≤ 2, but adding an infinite tower of massive particles with higher spins. Implications of this result in the context of AdS/CFT, quantum gravity in asymptotically flat space-times, and non-Gaussianity features of primordial gravitational waves are discussed.

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

Johannes Nordström (Bath)

Disconnecting the G2 moduli space

On Monday at 16:30 in DWB 501 (Seminar Room), a seminar in
the Holography series:

Adiel Meyer (Tel Aviv U.)

Lifshitz Hydrodynamics

On Tuesday at 12:00 in L4, a seminar in
the Relativity series:

Pierre Vanhove (IHES & Cambridge)

Single Valued Elliptic Multizetas and String theory

**Further information:**Modular invariance is ubiquitous in string theory. This is the symmetry of genus-one amplitudes, as well as the non-perturbative duality symmetry of type IIb superstring in ten dimensions. The alpha’ expansion of string theory amplitudes leads to interesting new modular forms. In this talk we will describe the properties of the new modular forms. We will explain that the modular forms entering the alpha’ expansion of genus one type-II superstring amplitude are naturally expressed as particular values of single valued elliptic multiple polylogarithm. They are natural modular generalization of the single valued elliptic multiple-zeta introduced by Francis Brown.

On Tuesday at 14:00 in L4, a seminar in
the Algebraic and Symplectic Geometry series:

Richard Thomas (Imperial College London)

Virtual signed Euler characteristics and the Vafa-Witten equations

**Further information:**I will describe 5 definitions of Euler characteristic for a space with perfect obstruction theory (i.e. a well-behaved moduli space), and their inter-relations. This is joint work with Yunfeng Jiang. Then I will describe work of Yuuji Tanaka on how to this can be used to give two possible definitions of Vafa-Witten invariants of projective surfaces in the stable=semistable case.

On Tuesday at 14:00 in DWB 501 (Seminar Room), a seminar in
the Holography series:

Sergey Solodukhin (U. Tours)

Conformal Anomaly, Entanglement Entropy, and Boundaries

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

Ed Segal (Inperial College London)

A new duality for categories of B-branes

On Wednesday at 12:00 in L4, a seminar in
the Strings Junior series:

Mark Van Loon

Anomalies

On Thursday at 13:00 in Dalitz Institute, DWB, a seminar in
the Particle Phenomenology Forum series:

Richard Ruiz (University of Durham)

QCD Corrections to Pair Production of Type III Seesaw Leptons at Hadron Colliders

**Further information:**http:/

On Thursday at 14:15 in BIPAC seminar room, DWB, a seminar in
the Cosmology series:

Anna Mangilli (IAS)

Constraints on the reionization era and inflation with the CMB polarization at large angular scales

On Thursday at 16:00 in L5, a seminar in
the Number Theory series:

Yiannis Petridis (University College London)

Lattice point problems in hyperbolic spaces

**Further information:**TBA

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

Frank Close, Chris Llewellyn-Smith (Oxford)

The scientific legacy of Dick Dalitz

On Friday at 15:30 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in
the Colloquia series:

Professor Mark Newman (University of Michigan)

Epidemics, Erdos Numbers, and the Internet: the Physics of Networks

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

Isabelle Gallagher (University of Paris-Diderot)

From particle systems to Fluid Mechanics

**Further information:**The question of deriving Fluid Mechanics equations from deterministic systems of interacting particles obeying Newton's laws, in the limit when the number of particles goes to infinity, is a longstanding open problem suggested by Hilbert in his 6th problem. In this talk we shall present a few attempts in this program, by explaining how to derive some linear models such as the Heat, acoustic and Stokes-Fourier equations. This corresponds to joint works with Thierry Bodineau and Laure Saint Raymond.

On Monday, February 15, at 12:00 in L5, a seminar in
the String Theory series:

Andrei Constantin (Uppsala)

TBA

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

Marco Gualtieri (Toronto)

Generalized Kähler structures from a holomorphic Poisson viewpoint

**Further information:**After reviewing the main results relating holomorphic Poisson geometry to generalized Kahler structures, I will explain some recent progress in deforming generalized Kahler structures. I will also describe a new way to view generalized kahler geometry purely in terms of Poisson structures.

On Tuesday, February 16, at 12:00 in L4, a seminar in
the Quantum Field Theory series:

Gandalf Lechner (Cardiff)

to be announced

On Tuesday, February 16, at 15:45 in L4, a seminar in
the Algebraic and Symplectic Geometry series:

Daniel Huybrechts (Bonn)

The K3 category of a cubic fourfold

**Further information:**Smooth cubic fourfolds are linked to $K3$ surfaces via their Hodge structures, due to work of Hassett, and via Kuznetsov's $K3$ category $A$. The relation between these two viewpoints has recently been elucidated by Addington and Thomas. We study both of these aspects further and extend them to twisted $K3$ surfaces, which in particular allows us to determine the group of autoequivalences of $A$ for the general cubic fourfold. Furthermore, we prove finiteness results for cubics with equivalent $K3$ categories and study periods of cubics in terms of generalized $K3$ surfaces.

On Wednesday, February 17, at 12:00 in L4, a seminar in
the Strings Junior series:

Andrea Ferrari

1/N expansion

On Thursday, February 18, at 13:00 in Dalitz Institute, DWB, a seminar in
the Particle Phenomenology Forum series:

Ulrich Haisch (University of Oxford)

Searching for new spin-0 resonances at LHCb (Temporary Title)

**Further information:**http:/

On Thursday, February 18, at 14:15 in BIPAC seminar room, DWB, a seminar in
the Cosmology series:

Fillipo Vernizzi (CEA Saclay)

A unifying description of dark energy

On Thursday, February 18, at 16:00 in L5, a seminar in
the Number Theory series:

Jonathan Pila (University of Oxford)

Joint Number Theory and Logic Seminar

**Further information:**TBA

On Thursday, February 18, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Giovanni Ridolfi (Universita' di Genova)

Stability of the Standard Model ground state

On Friday, February 19, at 15:30 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in
the Colloquia series:

Professor Michel Orrit (Huygens-Kamerlingh Onnes Laboratory, Leiden University)

Optical Microscopy and Spectroscopy of Single Molecules and Single Plasmonic Gold Nanoparticles

On Monday, February 22, at 12:00 in L5, a seminar in
the String Theory series:

Fernando Alday (Oxford)

TBA

On Monday, February 22, at 14:15 in L4, a seminar in
the Geometry and Analysis series:

OAC-manifolds meeting: Diarmuid Crowley (Aberdeen)

The Gromoll filtration, Toda brackets and positive scalar curvature

**Further information:**An exotic (n+1)-sphere has disc of origin D^k if k is the smallest integer such that some clutching diffeomorphism of the n-disc which builds the exotic sphere can be written as an (n-k)-parameter family of diffeomorphisms of the k-disc. In this talk I will present a new method for constructing exotic spheres with small disc of origin via Toda brackets. This method gives exotic spheres in all dimensions 8j+1 and 8j+2 with disc of origin 6 and with Dirac operators of non-zero index (such spheres are often called 'Hitchin spheres'). I will also briefly discuss implications of our results for the space of positive scalar curvature metrics on spin manifolds of dimension 6 and higher, and in particular the relationship of this project to the work of Botvinnik, Ebert and Randal-Williams. This is part of joint work with Thomas Schick and Wolfgang Steimle.

On Tuesday, February 23, at 15:45 in L4, a seminar in
the Algebraic and Symplectic Geometry series:

William (Danny) Gillam (Bogazici University Turkey)

Log stable maps and Morse theory of toric varieties

**Further information:**We will discuss a result to the effect that the moduli space of log stable maps to a toric variety X is 'the same' as the Morse-theoretic moduli space of broken gradient flow lines in the 'differentiable realization' Y of the fan for X. This is joint work with Sam Molcho.

On Wednesday, February 24, at 12:00 in L4, a seminar in
the Strings Junior series:

Carolina Matté Gregory

Holomorphy (4D N=1)

On Thursday, February 25, at 13:00 in Dalitz Institute, DWB, a seminar in
the Particle Phenomenology Forum series:

Jonathan Gaunt (NIKHEF)

Cancellation of Glauber gluon exchange in the double Drell-Yan process (Temporary Title)

**Further information:**http:/

On Thursday, February 25, at 14:15 in BIPAC seminar room, DWB, a seminar in
the Cosmology series:

Emir Gumrukcouglu (Imperial College)

Horava gravity: suppressing Lorentz violations in the matter sector

On Thursday, February 25, at 16:00 in L2, a seminar in
the Number Theory series:

Victor Beresnevich (University of York)

TBA

**Further information:**TBA

On Thursday, February 25, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Jeppe Andersen (IPPP Durham)

High energy collisions and Higgs boson properties

On Friday, February 26, at 15:30 in Martin Wood Lecture Theatre, Clarendon Laboratory, a seminar in
the Colloquia series:

Professor Mark Newton (University of Warwick)

Defect Engineering in Diamond

On Monday, February 29, at 12:00 in L5, a seminar in
the String Theory series:

Sameer Murthy (Kings College London)

TBA

On Monday, February 29, at 14:15 in L4, a seminar in
the Geometry and Analysis series:

Otis Chodosh (Cambridge)

tba

On Tuesday, March 1, at 12:00 in L4, a seminar in
the Quantum Field Theory series:

Roger Penrose

to be announced

On Wednesday, March 2, at 12:00 in L4, a seminar in
the Strings Junior series:

Alex Thorne

SUSY in 1D

On Thursday, March 3, at 13:00 in Dalitz Institute, DWB, a seminar in
the Particle Phenomenology Forum series:

David Kraljic (University of Oxford)

TBC

**Further information:**http:/

On Thursday, March 3, at 14:15 in BIPAC seminar room, DWB, a seminar in
the Cosmology series:

Donnacha Kirk (UCL)

Cosmology from cross-correlations using the Dark Energy Survey

On Thursday, March 3, at 16:00 in L2, a seminar in
the Number Theory series:

Neil Dummigan (University of Sheffield)

TBA

**Further information:**TBA

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

NB: Sciama Memorial Lecture today (TBD)

No seminar today

On Friday, March 4, at 14:00 in Dennis Sciama Lecture Theatre, a seminar in
the Theoretical Physics Colloquia series:

Mike Cates (Cambridge)

tba

On Monday, March 7, at 12:00 in L5, a seminar in
the String Theory series:

Sara Pasquetti (Surrey)

TBA

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

Nigel Hitchin (Oxford)

Spinors, Lagrangians and Higgs bundles

On Tuesday, March 8, at 15:45 in L4, a seminar in
the Algebraic and Symplectic Geometry series:

Tom Bridgeland (Sheffield)

TBA

On Wednesday, March 9, at 12:00 in L4, a seminar in
the Strings Junior series:

Yvonne Geyer

Sine-Gordon-Thirring - Quantum sire-Gordon equation as a massive Thirring

On Thursday, March 10, at 13:00 in Dalitz Institute, DWB, a seminar in
the Particle Phenomenology Forum series:

Konrad Tywoniuk (CERN)

Distorted jets in heavy-ion collisions: interferences and space-time picture

**Further information:**http:/

On Thursday, March 10, at 16:15 in Sciama Lecture Theatre, a seminar in
the Particles and fields series:

Fernando Quevedo (DAMTP Cambridge & ICTP Trieste)

On 4D string vacuua

On Thursday, April 28, at 13:00 in Dalitz Institute, DWB, a seminar in
the Particle Phenomenology Forum series:

Kiel Howe (Fermilab)

TBD

On Friday, June 3, at 16:00 in L1, a seminar in
the Math Colloquium series:

Bernd Sturmfels (UC Berkeley)

tba

On Friday, June 17, at 16:00 in L1, a seminar in
the Math Colloquium series:

David Vogan (MIT)

tbc