Oxford Particle Theory Group

Conformal)field)theory)and)quantum)gravity)

Gauge&string,duality,,holography,,AdS&CFT,correspondence,

String)theory)and)phenomenology)

La8ce)field)theory)

Phenomenology)of)electroweak)and)strong)interac>ons)

Physics)beyond)the)Standard)Model)

Par>cle)astrophysics)and)cosmology)

Mike%Teper%

Andrei%Starinets%John%Wheater%

Subir%Sarkar%Joe%Conlon%Giulia%Zanderighi%

Uli%Haisch% John%March>Russell%

Founded%1963,by,Dick,Dalitz,,Emeri@:,Jack,Paton,,Ian,Aitchison,,John,Taylor,,Chris,Llewellyn&Smith,,

Frank,Close,,Graham,Ross,,

Andre%Lukas%

Supported,by:,STFC,,EU,,Royal,Society,…,,

Juan%Rojo%

+,presently,12%postdocs%&,~25%DPhil%students%%%%

hMp://www2.physics.ox.ac.uk/research/par@cle&theory,

Jorge%Casalderrey>Solana%

Staff

Jorge Casalderrey-Solana Royal Society Fellow jorge.casalderrey@physics.ox.ac.uk

t

z

Energy Density

๏ A new state of matterQuark Gluon Plasma

๏ A strongly coupled fluid

๏ Extremely high temperaturesT > 2×1012 K = 170 MeV

Pb Pb

๏ LHC: Pb-Pb @ √s= 2.76 TeV

๏ What are the properties of QGP?• How is it generated?• What are its transport coefficients?• How does it interact with probes?

๏Techniques that we use• Holography: QFT ⟷ Gravity• pQCD• Effective field theory methods

Heavy Ion Collisions, Holography and Jets

bounds on light spin-0 states in dark

matter context

indirect probes of Higgs trilinear coupling

flavour anomalies seen

at LHCb

stop bounds in presence of flavour

mixing

ULI HAISCH DALITZ 2

Andre LukasMain interest: string theory, with emphasis on

• Calabi-Yau manifolds, vector bundles and heterotic model building

• Flux compactifications and non-CY manifolds

• (Computational) algebraic geometry and string theory

• M-theory compactifications and F-theory

• String cosmology

Current students: Challenger Mishra, Chuang Sun, Stefan Blasneag Capacity for one new students this year.

compactifications, model building and phenomenology. More specifically:

Major theme: “Getting the standard model from string theory”

John March-Russell

• Mystery of the Higgs & the Weak Scale:!

!

• Dark matter:!

!

• Strong CP problem: !

!

• Gauge unification? String Theory pheno? Family replication? CP-violation? Hidden Sectors? Gravity Waves? Inflation? Baryogenesis? Why 4D? Cosmo constant?…!

Approaches to the “Hierarchy Problem” — (non-minimal) supersymmetry? — unusual strong-coupling dynamics? —new symmetries? — extra dimensions? — physical naturalness?

What is it? How does it interact with SM sector? Unusual/new observational signals? New production mechanisms?

Is the Peccei-Quinn axion the solution or something new? Are there other super-light weakly coupled bosons like axion? How to discover them?

Dalitz #6

• Some recent papers (Oxford PhD students):

Twin Higgs Asymmetric Dark Matter IGG, Robert Lasenby, JMR

Twin Higgs WIMP Dark Matter IGG,RL,JMR

Signatures of Large Composite Dark Matter States Edward Hardy, RL, JMR, Stephen West

Auto-Concealment of Supersymmetry in Extra Dimensions Savas Dimopoulos, Kiel Howe, JMR, James Scoville

Big Bang Synthesis of Nuclear Dark Matter Edward Hardy, RL, JMR, Stephen West

Rare Flavor Processes in Maximally Natural Supersymmetry IGG, JMR

Retrofitted Natural Supersymmetry from a U(1) EH, JMR Precision Unification in -SUSY with a 125 GeV Higgs� EH, JMR, James Unwin

Natural Scherk-Schwarz Theories of the Weak Scale Isabel García García, Kiel Howe, JMR

Axion Mediation

Asymmetric Dark Matter via Spontaneous Co-Genesis

Masha Baryakhtar, EH, JMR

JMR, Matthew McCullough

Juan Rojo!!

STFC Rutherford Fellow !ERC Starting Grant PI

Neural Network Parton Distribution Functions (PDFs)!Encode non-perturbative dynamics for momentum distributions of quarks and gluons in the proton!Accurate PDFs required for Higgs couplings, high-mass BSM production and precision SM observables!Recently: PDFs with LHC data, PDFs with QED corrections, PDFs with all-order resummations, nuclear PDFs!

! Jet reconstruction and substructure!

Boosted final states crucial in many relevant SM and BSM measurements, like VH(->bb). !Jet substructure improves signal discrimination and bkg rejection!Recently: scale-invariant resonance tagging, new physics in Higgs pair-production, strong diHiggs in vector-boson-fusion!

!NLO event generators!

LHC phenomenology requires N(N)LO Monte Carlo generators, with high automation and possibility of merging!Recently: aMCfast, fast interface to automated NLO and NLO+PS calculations from aMCatNLO, new tunes of Pythia8!

Early&universe:&Reconstruc*on+of+the+primordial+spectrum+of+scalar/tensor+fluctua*ons+�+features+may+indicate+departures+from+‘slow9roll’+during+infla*on+…++also+BICEP2+gravita*onal+wave+spectrum+has+wrong+sign!+

High&energy&neutrinos:&I+par*cipate+in+the+IceCube&expt.+which+has+discovered+cosmic+high+energy+neutrinos+…+now+determining+flavour+composi*on+++es*ma*ng+background+from+atmospheric+charm+++measuring+neutrino+oscilla*ons,

Dark&ma6er:&Par*cular+interest+in+asymmetric+relic+par*cles+and+their+phenomenology+–+and+aKempts+at+detec*on+by+both+terrestrial+and+cosmic+experiments+…++Recent:+DM+content+of+dSphs+++Self9interac*ons+in+A3827?+,

arXiv:1506.01354+

BICEP2+

arXiv:1510.03338+

arXiv:1412.7719+

arXiv:1504.0657+arXiv:1504.02048+

Late&universe:&The+SN+Ia+Hubble+diagram+shows+<3σ+evidence+for+cosmic+accelera*on+(=>+‘dark+energy’)++++In+the+ΛCDM+cosmology,+there+should+be+∼0.1+Bullet+Cluster9like+systems+(whereas+>10+have+been+seen!)+

arXiv:1502.03376+ arXiv:1507.04005+

I+am+at+Oxford+only+during+term+9+rest+of+the+*me+at+NBI+Copenhagen+++Students:&David&Kraljic,&Jim&Talbert&(++Jeppe+Nielsen+&+Amel+Durakovic++@+NBI)+

Closed'strings'picture:'dynamics'of'strings''&'branes'at'low'energy'is'described'by'string'theory'in'curved'space'in'higher'dim.'

''''''conjectured'exact''equivalence'

Open'strings'picture:'dynamics'of'strings''&'branes'at'low'energy'is'desribed'by''a'quantum'field'theory'without'gravity''

AdSBCFT'correspondence''''''''''''''''GaugeBgravity'duality' GaugeBstring'duality' Holography'

STRONG'COUPLING' WEAK'COUPLING'

Allows'study'of'correlaPon'funcPons,'Wilson'loops,'thermodynamics,'transport,''nonBequilibrium'behavior,'turbulence,'quantum'quenches'etc'in'STRONGLY'interacPng'

systems'(of'some'class)'by'using'their'DUAL'weak'gravity'descripPon'''

Oxford'Holography'Group:'J.'Casalderrey'Solana'(RSURF),'T.Andrade,'C.Eling,'A.Ficnar,''V.Keranen,'P.Kleinert,'J.Probst,'N.Gushterov,'A.Starinets'

Mike Teper – Lattice Field Theory

physics of strongly-coupled field theories e.g. gauge theories

recent past:

• SU(N) at large N

=⇒ SU(3) is close to SU(∞) for basic physical quantities

currently:

• calculating the spectrum of confining flux tubes

– effective string description of flux tubes

with Andreas Athenodorou – former student:

e.g. arXiv:1303.5946, 1103.4547, 1007.4720

some recent stringy analyses using our results:

Aharony and Komargodski, arXiv:1302.6257

Dubovsky, Flauger and Gorbenko, arXiv: 1301.2325

• SO(N) gauge theories in D = 2 + 1 and D = 3 + 1

with Richard Lau – recent student:

arXiv:1208.4547 + several in pipeline

• SU(N) gauge theories in D = 2 + 1

1

John Wheater

Discretized models of Quantum Gravity & Quantum Geometry

Matrix Models Rigorous Combinatorics

Manifolds Graphs

Statistical Mechanics

Quantum Field Theory

Numerical Simulation

JW, Ben Niedner (just submitted), collaborators in Copenhagen & Reykjavik

My research focuses on LHC phenomenology

Recent/ongoing work includes

• NLO calculations

• first NNLO+Parton Shower for Higgs and Drell Yan production

• resummation of soft/collinear logs in Higgs production with a jet-veto

• finite mass effects in Higgs production

• electroweak ZZ production & application to anomalous couplings

• fully differential calculation of VBF Higgs production at NNLO

Giulia Zanderighicurrently on leave a 5y leave at CERN

Postdocs

Christopher Eling

Postdoctoral researcher in Andrei Starinets’ group

Past research: “quantum gravity phenomenology", alternative theories ofgravity with local Lorentz violation

Currently: Holography (quantum gravity in d + 1 dimensions equivalentto QFT in d dimensions, e.g. AdS/CFT, but also more general)

Mapping between fluid dynamics and dynamics of black holes- learnsomething new about gravity from hydrodynamics and visa versa, e.g. fluidturbulence in terms of a random measure”Spacetime thermodynamics"- Einstein equations fromthermodynamics/quantum entanglement, emergence of spacetime fromunderlying quantum system

Research interests & activity

• QCD spin structure of the proton and its phenomenologywhat is the nature of the spin of the proton?how do quarks and gluons contribute to the proton spin?how do quarks and gluons hadronize into final-state particles?

1

1

arX

iv:1

212.

1701

v3 [

nucl

-ex]

30

Nov

201

4

• PDF determination for LHC phenomenology and beyond

x

3−10 2−10 1−10 1

0

0.1

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0.3

0.4

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0.6

0.7

0.8

0.9

1

g/10

vu

vd

d

c

s

u

NNPDF3.0 (NNLO)

)2=10 GeV2µxf(x,

x

3−10 2−10 1−10 1

0

0.1

0.2

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0.5

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vu

vd

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u

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)2 GeV4=102µxf(x,

• I work in Juan’s group and I recently joined

Personal path

• born in Aosta, Italy

• Ms.Sc.1, Ph.D.2, PD3

• glad to join Oxford Physics

Emanuele R. Nocera (Dalitz, 9b) A two-minute slide 15 October 2015 1 / 1

Emeriti & Visitors

Graham Ross - Room 4.7

Higgs discovery !

The origin of mass! − c, τ , b,W , Z, t

!!

− MHiggs ???

•• MH ∼ MH"

Scale symmetry – classical & quantum -

SUSY

• Inflation!!

Natural, hybrid Gabriel German

Scale independent Chris Hill

• Scanning

MH = 0

MH ∼ (MH0 + λ φ )

Name % %%%%= %Chris%Allton%“Home”% %%%%= %Swansea%University%Rugby%Team %%%%= %Wallabies%Research%Area%= %QCD%at%high%temperatures%Research%Tool%%= %LaDce%Gauge%Theory%%

+A (x)µA (x)µ

|P >i |P >0

Creates a towerof states x,y,z

t

0 0.2 0.4 0.6 0.8 1 1.2 1.4

r [fm]

2.5

3

3.5

4

VC(r)

[GeV

]

-3 -2 -1 0 1 2 3

ω

0

ρ(ω)

T = 1.90TCT = 1.52TCT = 1.27TCT = 1.09TCT = 0.95TCT = 0.84TCT = 0.76TCT = 0.24TC

024681012

0

1

2

3

4

5

9 10 11 12 13 14 15

⇢(!)/m

2 b

9 10 11 12 13 14 15! (GeV)

9 10 11 12 13 14 15

⌥T/Tc = 0.76

0.84

0.840.95

0.951.09

1.091.27

1.271.52

1.521.90

Nucleons%+%Parity% Charmonium%PotenHal% Upsilon%MelHng%

Name: Gabriel German.Visiting until end of July, 2016.Working with Prof. Graham G. Ross and (possibly) with Prof. Subir Sarkar.

Purpose of the visit: to study details of Hybrid Natural Inflation (HNI) both theoretically and in the light of Planck and other experiments.

HNI was proposed in 2010 by Graham G. Ross and GG in two papers:

HNI from non Abelian discrete symmetry, Hybrid Natural Low Scale Inflation,Phys.Lett. B684 (2010) 199-204. Phys.Lett. B691 (2010) 117-120.

The model generalise Natural Inflation in the sense that a sub-Planckian scale of (pseudo) Nambu-Goldstone symmetry breaking is generated.

The inflationary sector is simply given by the potential

The model is of the hybrid type

Before July 2016 we should be able to know where to put the model

or

STEPHEN WEST

DARK MATTER AND HIDDEN SECTORS

BEYOND WIMP DM - FREEZE-IN, NUCLEAR DARK MATTER…

LINK TO MATTER-ANTIMATTER ASYMMETRY - ASYMMETRIC DARK MATTER

ASTRO-PARTICLE PHYSICS

BLACK HOLES

BSM PHYSICS AT THE LHC

EARLY UNIVERSE COSMOLOGY

ELECTROWEAK SYMMETRY BREAKING

DARK MATTER CONSEQUENCES FOR STARS

LONG LIVED STATES

ANYTHING BSM INCLUDING DARK MATTER!

COLLIDING PARTICLES IN THE FIELDS OF…

EXTENDED HIGGS SECTORS

HOW DO WE PROBE MORE COMPLICATED HIDDEN SECTORS?

DARK MATTER DIRECT AND INDIRECT DETECTION

Neighbours

1

Higgs boson and EWSB � mH natural or fine-tuned ? Æ if natural: what new physics/symmetry? � does it regularize the divergent VLVL cross-section at high M(VLVL) ? Or is there a new dynamics ? � elementary or composite Higgs ? � is it alone or are there other Higgs bosons ? � origin of couplings to fermions � coupling to dark matter ? � does it violate CP ? � cosmological EW phase transition

Neutrinos: � ν masses and and their origin � what is the role of H(125) ? � Majorana or Dirac ? � CP violation � additional species Æ sterile ν ?

Dark matter: � composition: WIMP, sterile neutrinos, axions, other hidden sector particles, .. � one type or more ? � only gravitational or other interactions ?

The two epochs of Universe’s accelerated expansion: � primordial: is inflation correct ? which (scalar) fields? role of quantum gravity? � today: dark energy (why is Λ so small?) or gravity modification ?

Quarks and leptons: � why 3 families ? � masses and mixing � CP violation in the lepton sector � matter and antimatter asymmetry � baryon and charged lepton number violation

Physics at the highest E-scales: � how is gravity connected with the other forces ? � do forces unify at high energy ?

Outstanding Questions in Particle Physics circa 2014 … there has never been a better time to be a particle physicist!

PP Strategic Plan

• Accelerator based: Searches for BSM physics & SM benchmarks

• Neutrinos

• Dark Universe

• Silicon and related work near the IP

• Accelerator Physics (JAI)

• Advanced Data Acquisition

• Advanced particle ID

The themes are: intertwined and overlapping, have many links to Theory and Astro

We place an extremely high priority on interactions with theory and seek to

systematically enhance those interactions going forward

Each theme self-organized to develop a strategy within the context of Oxford, the UK, the

European & emerging global strategy for particle physics, broadly interpreted.

Two scenarios: blue sky 10 - 20 years

tempered by reality over next few years

3

Higgs boson and EWSB � mH natural or fine-tuned ? Æ if natural: what new physics/symmetry? � does it regularize the divergent VLVL cross-section at high M(VLVL) ? Or is there a new dynamics ? � elementary or composite Higgs ? � is it alone or are there other Higgs bosons ? � origin of couplings to fermions � coupling to dark matter ? � does it violate CP ? � cosmological EW phase transition

Neutrinos: � ν masses and and their origin � what is the role of H(125) ? � Majorana or Dirac ? � CP violation � additional species Æ sterile ν ?

Dark matter: � composition: WIMP, sterile neutrinos, axions, other hidden sector particles, .. � one type or more ? � only gravitational or other interactions ?

The two epochs of Universe’s accelerated expansion: � primordial: is inflation correct ? which (scalar) fields? role of quantum gravity? � today: dark energy (why is Λ so small?) or gravity modification ?

Quarks and leptons: � why 3 families ? � masses and mixing � CP violation in the lepton sector � matter and antimatter asymmetry � baryon and charged lepton number violation

Physics at the highest E-scales: � how is gravity connected with the other forces ?

� do forces unify at high energy ?

ATLAS

LHC-b

DUNE HyperK MINOS T2K SNO+0vvββ

LZ

LSST

HL-LHC/HE-LHC/ ILC/CLIC/FCC

Oxford is one of the few universities on the planet that has an experimental programme addressing most of these questions in the same department as an active theory groupp!

Underpinned by strong theory group - YOU!

1

DARK UNIVERSE

DRAFT

A green paper produced for the particle physics strategy exercise by members of the

sub-departments of astrophysics, particle physics, and theory

Editors: Joe Conlon, Jo Dunkley, Pedro Ferreira, Hans Kraus, Subir Sarkar,

Ian Shipsey

Authors: James Binney, Joe Conlon, Roger Davies, Julien Devriendt Jo Dunkley,

Pedro Ferreira, Uli Haisch, Hans Kraus, John March-Russell, Lance Miller,

John Maggorian, Subir Sarkar, Ian Shipsey, Adrianne Slyz

! !

In addition to PP many authors from Theory and Astro

1""

Oxford'LHCb'group:'New'Physics'searches'with'quark'flavour'measurements'"

1. Introduction'

Flavour"physics"boasts"a"long"history"of"discovery"physics"by"making"precision"measurements"of"decays"sensitive"to"high"mass9scale"currents"running"in"virtual"loop"processes."LHCb"is"currently"the"luminosity9frontier"experiment"and"has"had"a"hugely"successful"period"of"operation"since"machine"startup"in"2010."The"experiment"has"collected"a"total"of"3"fb91"of"data,"an"achievement"made"possible"by"the"experiment’s"ability"to"run"at"over"twice"its"design"luminosity."The"Oxford"group"has"firmly"established"itself"as"one"of"the"most"productive"groups"in"the"LHCb"collaboration"and"we"are"proud"that"we"have"played"a"central"role"in"the"acquisition"and"analysis"of"these"world9leading"results."LHCb,"together"with"its"upgrade,"will"provide"a"rich"source"of"physics"measurements"for"at"least"the"next"fifteen"years.""

The"Oxford"group’s"long9term"strategy"for"physics"exploitation"is"dictated"by"our"core"specialities"in"the"design"and"operation"of"the"Ring"Imaging"Cherenkov"and"the"silicon"microvertex"detectors,"as"well"as"our"responsibility"for"the"calibration"of"the"experiment’s"particle"identification."Our"LHCb"physics"planning"was"key"to"us"joining"the"CLEO9c"experiment"in"2006,"where"we"made"several"important"measurements"with"quantum9correlated"D9decays,"results"which"provide"essential"input"to"the"CKM"and"charm"measurements"we"make"on"LHCb"today."Our"strategic"goal"for"physics"analysis"broadly"spans"the"following"three"areas:"""

Precision"CKM"metrology"where"we"have"led"several"flagship"analyses,"most"notably"the"first"LHCb"measurement"of"the"unitarity9triangle"angle" ."Here"and"in"the"future"our"CLEO9c"quantum9correlated"results will"play"an"important"role."

Charm"physics"where"we"have"been"instrumental"in"making"the"first"measurements"of"CP"violation,"with"the"future"aim"to"pursue"the"accuracy"down"to"the"Standard"Model"level;""

Exclusive"diffractive"production"in"pp"collisions"to"rigorously"test"QCD,"where"we"have"pioneered"the"physics"and"also"the"instrumentation"for"the"new"Herschel"forward"detector."""

In"addition,"group"members"make"important"contributions"in"the"following"areas:"

Excited"heavy9flavour"spectroscopy:"exploring"the"limits"of"the"quark"model;" Electroweak"loop"decays:"exploiting"sensitivity"to"particles"at"a"high9mass"scale.""

The"Oxford"LHCb"group"has"three"permanent"academic"staff"members,"Neville"Harnew,"Malcolm"John"and"Guy"Wilkinson."We"also"have"two"STFC9supported"postdocs,"Sneha"Malde"and"Christopher"Thomas"with"a"third"soon"to"start,"Paolo"Gandini,"an"EU"Fellow,"Denis"Derkach,"and"an"Oxford9supported"postdoc"working"on"the"upgrade,"Pavel"Jalocha.""We"have"around"8"graduate"students"over"3.5"years"of"their"term."In"addition"we"have"an"electronic"(Rui"Gao)"and"mechanical"engineer"(Matthew"Brock),"as"well"as"a"physicist"programmer"(Stig"Topp9Jorgensen)."We"also"make"regular"use"of"the"Oxford"Electronic"and"Mechanical"Workshops."

Harnew"and"Wilkinson"were"heavily"involved"already"at"the"inception"of"LHCb,"and"group"members"have"since"taken"leadership"roles"in"the"collaboration."Wilkinson,"was"the"first"elected"Physics"Coordinator"of"the"experiment"and"has"since"been"elected"Spokesperson,"a"position"which"he"will"occupy"until"June"2017."Harnew"has"had"a"49year"term"as"Collaboration"Board"Chairman"of"LHCb"and"

 Accelerator Based Searches for Physics Beyond the Standard Model 

and the Measurement of Standard Model Benchmark Processes  

Oxford ATLAS Group Vision and Strategy   

  

  

DRAFT 23.11.2014 

   

A green paper produced for the particle physics strategy exercise   

 Alan Barr, Daniela Bortoletto, Amanda Cooper­Sarkar, Elizabeth Gallas, Claire Gwenlan, Chris 

Hays, Todd Huffman, Cigdem Issever, Juan Rojo, Ian Shipsey, Jeff Tseng, Tony Weidberg  

    

1  

Recent Theory/Experimental Particle Physics Collaborations Joint Supervision: • Uli Haisch/Guy Wilkinson: supervised Rhorry Gauld who studied the potential of top

measurement at LHCb • Juan/Rojo/ AMC-S : supervise Franceso Giuli who is involved with High-Mass Drell-Yan

measurements in ATLAS, both for BSM physics and as an SM measurement to be input to PDF fits

• John March-Russell/Alan Barr : supervised James Scovell who studied Supersymmetric Searches in ATLAS– and Jesse Liu has just joined them

Faculty Interaction: • Giulia Zanderighi/Chris Hays: estimation of uncertainties on Higgs boson cross-sections

involving measurements with jet binning • Juan Rojo/AMC-S/Claire Gwenlan: inclusion of ATLAS data into PDF fits including MCFast

techniques– most recently W+c with Valerio Bertone • Guido Bell/AMC-S/CG: calculations of the transverse momentum of the Z boson for inclusion

in PDF fits • Guido Bell/Chris Hays: accurate modelling of the transverse momentum of the Higgs boson • Juan Rojo/Cigdem Issever: feasibility study for the measurement of Higgs self-coupling in the

4b state with boosted techniques PDRAs • Re was involved with the development of POWHEG and MiNLOand Monni with theory

uncertainties in jet vetoes

Astrophysics

• Circa 29 faculty

• Head of sub-dept: Prof Steve Balbus

• Areas

• Instrumentation (ELT,SKA,CBASS, WEAVE, ...)

• Observations (CMB, Optical, Radio, IR. Xray)

• Theory (compact objects, galaxies, large scale structure, early universe)

Monday, 12 October 15

Cosmology• Jo Dunkley (CMB)- Planck, ACTs

• Julien Devriendt (Galaxy evolution and formation)- computational and analytical techniques

• Pedro G Ferreira (Cosmology theory)- Early universe, general relativity, large scale structure

• Lance Miller (Weak Lensing)- CFHTLenS, Euclid, KIDS

• Joe Silk (Astroparticle and Galaxies)- dark matter, large scale structure, CMB

• Adrianne Slyz (Galaxy evolution and formation)- computational and analytical techniques

Monday, 12 October 15

Beecroft Institute• David Alonso (LSS)

• Tessa Baker (GR, LSS)

• Rafael Alves Batista (Astroparticle)

• Erminia Calabrese (CMB)

• Elisa Chisari (WL)

• Giuseppe Congedo (WL, GWaves)

• Julian Mertens (WL)

• Sigurd Naess (CMB)

• Johannes Noller (GR, Early Universe)

• Mark Richardson (LSS, Galaxies)

• David Sloan (Inflation, Early Universe)

• Niraj Welikala (WL, Galaxies)

• Hans Winther (GR, Early Universe)

Monday, 12 October 15

String Theory Group (Maths Branch)• James Sparks ; AdS/CFT

• Fernando Alday ; integrability, strong coupling limit of N=4 SYM

• Lionel Mason and Andrew Hodges ; twistor string theory, amplitudes of N=4 SYM amplitudes.

• Xenia de la Ossa and PC ; CY manifolds and heterotic string theory, non-Kähler manifolds.