String Phenomenology 2019 (24-28 June 2019) · Indico

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String Phenomenology 2019

from Monday 24 June 2019 (08:00) to Friday 28 June 2019 (18:30)

Monday 24 June 2019
09:00 Branes and the Swampland - Gary Shiu (University of Wisconsin & HKUST)
Branes and the Swampland
- Gary Shiu (University of Wisconsin & HKUST)
09:00 - 09:30
Room: 500/1-001 - Main Auditorium Completeness of the spectrum of charged branes in a quantum theory of gravity naturally motivates the question of whether consistency of what lives on the branes can be used to explain some of the Swampland conditions. In this paper we focus on consistency of what lives on string probes, to show some of the theories with N=(1,0) supersymmetry in 10d and 6d, which are otherwise consistent looking, belong to the Swampland. Gravitational and gauge group anomaly inflow on these probes can be used to compute the gravitational central charges (c_L,c_R) as well as the level of the group's current algebra k_L. The fact that the left-moving central charge on the string probes should be large enough to allow unitary representations of the current algebra with a given level, can be used to rule out some theories. This in particular explains why it has not been possible to construct the corresponding theories from string theory.
09:30 Swampland conjectures at the limits in field space - Thomas Grimm
Swampland conjectures at the limits in field space
- Thomas Grimm
09:30 - 10:00
Room: 500/1-001 - Main Auditorium String compactifications are often performed in some asymptotic regime in field space, such as at weak string coupling or at large volume. I introduce the theory allowing to systematically analyze all such large field limits in geometric moduli spaces. I argue that along each of such limits a universal structure emerges that can enlighten and test proposed swampland conjectures. I will exemplify this by briefly discussing evidence for the distance conjecture, the axion weak gravity conjecture, and the de Sitter conjecture.
10:00 A Strong WGC from the Modular Bootstrap - Miguel Montero (KU Leuven)
A Strong WGC from the Modular Bootstrap
- Miguel Montero (KU Leuven)
10:00 - 10:30
Room: 500/1-001 - Main Auditorium In its mildest version, the Weak Gravity Conjecture postulates the existence of superextremal particles of any charge Q. This is not really a constraint on the low-energy EFT, since this charge could a priori be arbitrarily large, resulting in a very massive WGC particle. This applies to (quasi-)sublattice versions of the conjecture too, where the role of Q is played by the index of the WGC sublattice. In this talk we will see how, in the context of worldsheet string theory, it is possible to obtain a universal upper bound on Q in the bosonic sector from the modular bootstrap, thus obtaining a strong form of the WGC in the closed string sector.
10:30 Coffee break
Coffee break
10:30 - 11:00
Room: 500/1-001 - Main Auditorium
11:00 Instantons and Infinite Distances - Fernando Gabriel Marchesano Buznego (Consejo Superior de Investigaciones Cientificas (CSIC) (ES))
Instantons and Infinite Distances
- Fernando Gabriel Marchesano Buznego (Consejo Superior de Investigaciones Cientificas (CSIC) (ES))
11:00 - 11:30
Room: 500/1-001 - Main Auditorium
11:30 The Two Faces of T-branes - Raffaele Savelli
The Two Faces of T-branes
- Raffaele Savelli
11:30 - 12:00
Room: 500/1-001 - Main Auditorium T-branes are intrinsically non-Abelian brane configurations whose exotic features are not fully captured by geometry alone. The purpose of this talk is to give evidence for the existence of a brane-brane duality connecting T-branes to collections of ordinary Abelian branes, which encode the T-brane data in their non-trivial worldvolume curvature. The dual picture is argued to be reliable when the traditional description of T-branes in terms of Hitchin systems breaks down due to large field variations.
12:00 Chern-Simons and Heterotic Superpotentials - James Gray (Virginia Tech)
Chern-Simons and Heterotic Superpotentials
- James Gray (Virginia Tech)
12:00 - 12:30
Room: 500/1-001 - Main Auditorium Compactifications of Heterotic theories on Calabi-Yau manifolds have a Chern-Simons like contribution to their four dimensional superpotential. In this talk I will discuss some aspects of computations and general theory behind understanding this often ignored contribution to the effective theory of such constructions.
12:30 Lunch
Lunch
12:30 - 14:30
14:30 Constraining the early universe with gravitational waves - Chiara Caprini (APC Paris)
Constraining the early universe with gravitational waves
- Chiara Caprini (APC Paris)
14:30 - 15:00
Room: 500/1-001 - Main Auditorium Gravitational waves can be a powerful probe of cosmology, both for what concerns the late-time and the very early universe. I will present the main reasons why and provide some examples, in particular in the context of the space-based interferometer LISA.
15:00 Dark Energy in String Theory - Susha Louise Parameswaran (University of Liverpool)
Dark Energy in String Theory
- Susha Louise Parameswaran (University of Liverpool)
15:00 - 15:30
Room: 500/1-001 - Main Auditorium I will discuss recent attempts to describe dark energy, including quintessence, using string theory.
15:30 de Sitter Vacua from Ten Dimensions - Liam McAllister
de Sitter Vacua from Ten Dimensions
- Liam McAllister
15:30 - 16:00
Room: 500/1-001 - Main Auditorium I will critically analyze the de Sitter construction of KKLT using ten-dimensional supergravity.
16:00 Coffee break
Coffee break
16:00 - 16:30
Room: 500/1-001 - Main Auditorium
16:30 R-Parity Violating Decays of Chargino and Neutralino LSPs in the B-L MSSM - Burt Ovrut (University of Pennsylvania)
R-Parity Violating Decays of Chargino and Neutralino LSPs in the B-L MSSM
- Burt Ovrut (University of Pennsylvania)
16:30 - 17:00
Room: 500/1-001 - Main Auditorium The R-parity violating decays of Wino Chargino and Bino Neutralino LSPs are analyzed within the context of the B-L MSSM. These LSPs correspond to statistically determined soft supersymmetry breaking parameters which, when renormalization group evolved to lower energy, lead to an effective theory satisfying all phenomenological requirements. The explicit RPV decay channels of these LSPs to standard model particles, the analytic and numerical decay rates and the associated branching ratios are presented.
17:00 Line Bundles in String Model Building - Andre Lukas (U)
Line Bundles in String Model Building
- Andre Lukas (U)
17:00 - 17:30
Room: 500/1-001 - Main Auditorium I discuss a recent count of heterotic line bundle models which suggests that the number of string standard models is exponentially large. In the second half of the talk, I focus on the underlying methods to compute line bundle cohomology. New analytic results for line bundle cohomology on complex manifolds point to an underlying mathematical structure which I discuss. Machine learning techniques may be helpful to uncover this structure.
17:30 A new approach to heterotic moduli and dualities - Lara Anderson
A new approach to heterotic moduli and dualities
- Lara Anderson
17:30 - 18:00
Room: 500/1-001 - Main Auditorium In this talk I will review the way that the moduli of heterotic theories arise from a coupling of the geometry of Calabi-Yau manifolds and holomorphic, stable bundles over them. I will demonstrate that the complete geometry (manifold + bundle) of a heterotic theory can be described via a higher dimensional, toric complete intersection manifold and explain how this formulation may shed new light on heterotic string dualities.
18:30 Reception CERN Restaurant 1
Reception CERN Restaurant 1
18:30 - 20:30
Room: 500/1-001 - Main Auditorium
Tuesday 25 June 2019
09:00 A Swampland Update - Cumrun Vafa (Harvard University)
A Swampland Update
- Cumrun Vafa (Harvard University)
09:00 - 09:30
Room: 500/1-001 - Main Auditorium I present some recent progress in formulating new swampland criteria.
09:30 Asymptotic flux vacua and the Swampland - Irene Valenzuela
Asymptotic flux vacua and the Swampland
- Irene Valenzuela
09:30 - 10:00
Room: 500/1-001 - Main Auditorium The Swampland constraints can be often understood as a quantum gravity obstruction to restore global symmetries at infinite field distance. This constrains the physics near the large field limits by requiring the presence of new light states but also constraining the form of the kinetic terms, gauge couplings and the scalar potential of the effective theory. In this talk, I will focus on the scalar potential and the structure of flux vacua at the asymptotic regions of the complex structure moduli space of M-theory compactified on a Calabi-Yau fourfold. Interestingly, we can use powerful mathematical theorems to derive the asymptotic form of the flux induced scalar potential near any large field limit and check the Swampland conjectures. We classify all possible two large field limits in Calabi-Yau fourfolds and check that the potential never admits deSitter vacua at parametric control.
10:00 The Weak Gravity Conjecture and Repulsive Forces - Ben Heidenreich
The Weak Gravity Conjecture and Repulsive Forces
- Ben Heidenreich
10:00 - 10:30
Room: 500/1-001 - Main Auditorium The Weak Gravity Conjecture (WGC) has a variant based on repulsive long-range forces. I discuss this "Repulsive Force Conjecture" (RFC) in detail, describing its relation to the WGC and to black holes, and what evidence supports the conjecture. I also discuss strong forms of the conjecture, such as the "sublattice RFC", how these are realized in perturbative string theory, and how all of these conjectures relate to BPS states.
10:30 Coffee break
Coffee break
10:30 - 11:00
Room: 500/1-001 - Main Auditorium
11:00 de Sitter vacua in string theory: the landscape or the swampland? - Mariana Grana (Unknown)
de Sitter vacua in string theory: the landscape or the swampland?
- Mariana Grana (Unknown)
11:00 - 11:30
Room: 500/1-001 - Main Auditorium While string theory was believed to have a landscape of de Sitter vacua, the recent swampland conjectures postulate that metastable de Sitter vacua are in the swampland. In this talk I will focus on what seems to be the most solid and generic construction of de Sitter vacua in string theory, that of KKLT, and show the multiple reasons why it might be in the swampland.
11:30 Three Swampland Variations - Ralph Blumenhagen
Three Swampland Variations
- Ralph Blumenhagen
11:30 - 12:00
Room: 500/1-001 - Main Auditorium Three different issues will be discussed and explicitly exemplified that are related to the dS swampland conjecture and are motivated by the questions: Does it hold away from the perturbative regime? What are the logical consequences if it is true? Can one broaden the perspective to circumvent the dS no-go consequences?
12:00 Non-supersymmetric D-branes - Timm Michael Wrase (Vienna University of Technology)
Non-supersymmetric D-branes
- Timm Michael Wrase (Vienna University of Technology)
12:00 - 12:30
Room: 500/1-001 - Main Auditorium I will argue that D-branes provide an interesting ingredient for constructing and understanding non-supersymmetric string theory compactifications. D-branes break supersymmetry spontaneously. This can lead to setups with non-linearly realized supersymmetry. This non-linear symmetry is still constraining the action, can be sufficient to derive renormalization theorems and therefore gives substantial control over the string compactification. I will correct a misconception in the literature about SUSY breaking intersecting D-branes. Then I discuss flux compactifications with non-supersymmetric D-branes that provide an interesting testing ground for the recent dS swampland conjecture.
12:30 Lunch
Lunch
12:30 - 14:30
14:30 1A
1A
14:30 - 16:00
Room: 500/1-001 - Main Auditorium
Contributions

14:30 Moduli stabilisation and inflation in a Type IIB/F-theory framework - Georgios Leontaris (University of Ioannina (GR))

14:45 Non-Minimal M-flation - Amjad Ashoorioon (Institute for Research in Fundamental Sciences (IPM))

15:00 Two-field Cosmological alpha-attractors with Noether Symmetry - Lilia Anguelova (Utrecht University)

15:15 O(D,D) completion of the Friedmann equations - Stephen Angus (IBS Center for Theoretical Physics of the Universe)

15:30 Axion RG flows and a bound on axion excursions - Lukas Witkowski (Laboratoire APC)

15:45 Transplanckian axion monodromy!? - José Calderón Infante (Instituto de Física Teórica (UAM/CSIC))
2A
2A
14:30 - 16:00
Room: 503/1-001 - Council Chamber
Contributions

14:30 Walls of Marginal Stability and the Swampland Distance Conjecture - Markus Dierigl (Utrecht University)

14:45 Testing the weak gravity conjecture in type I strings with broken supersymmetry - Quentin Bonnefoy

15:00 The Swampland Distance Conjecture for Kähler moduli and emergence - Pierre Corvilain (Utrecht U)

15:15 A Strong Scalar Weak Gravity Conjecture and Some Implications - Eduardo Gonzalo

15:30 The Swampland Distance Conjecture and Towers of Tensionless Branes - Alvaro Herraez (Universidad Autónoma de Madrid/ Instituto de Física Teórica UAM)

15:45 Swampland Distance Conjecture for One-Parameter Calabi-Yau Threefolds - Abhinav Joshi (University of Bonn)
3A
3A
14:30 - 16:00
Room: 4/3-006 - TH Conference Room
Contributions

14:30 No-Go theorems for ekpyrosis from ten-dimensional supergravity - Kunihito Uzawa (Kwansei Gakuin University)

14:45 Black Hole Superradiance Constraints on the KS Axiverse - Viraf Mehta (University of Goettingen)

15:00 Moduli Stars - Francesco Muia

15:15 Moduli Portal between visible and hidden sectors - Igor Broeckel (University of Bologna)

15:30 Spontaneous dark-matter mass generation along cosmological attractors in string theory - Thibaut Coudarchet (Ecole Polytechnique)

15:45 Shift Symmetric Orbital Inflation - Yvette Welling (Deutsches Elektronen-Synchrotron DESY)
16:00 Coffee break
Coffee break
16:00 - 16:30
Room: 500/1-001 - Main Auditorium
16:30 1B
1B
16:30 - 18:00
Room: 500/1-001 - Main Auditorium
Contributions

16:30 U(1)R inspired inflation model in no-scale supergravity - Shaaban Khalil Ibrahim (ENHEP Egyptian Network of High Energy Physics (EG))

16:45 Holography, relaxions and the self-tuning of the cosmological constant - Yuta Hamada (University of Crete)

17:00 The supersymmetric anti-D3-brane action in KKLT - Niccolo Cribiori (Vienna University of Technology)

17:15 On the stability of SUSY breaking Warped Throats. - Eduardo Garcia-Valdecasas Tenreiro (IFT UAM-CSIC)

17:30 Geometrical destabilisation of light fields in String Inflation - Veronica Guidetti (University of Bologna)

17:45 A Landscape of AdS Flux Vacua - Joan Quirant (IFT (UAM/CSIC))
2B
2B
16:30 - 18:00
Room: 503/1-001 - Council Chamber
Contributions

16:30 Carving out the Swampland of 6D SCFTs - Florent Baume (IFT Madrid)

16:45 A CICY scan for orientifolds - Federico Carta (DESY)

17:00 Fibers and 5d SCFTs - Craig Lawrie (University of Pennsylvania)

17:15 Yukawa Hierarchies in Global F-theory Models - Ling Lin (University of Pennsylvania)

17:30 F-theory on quotient elliptic threefolds - Paul-Konstantin Oehlmann (Virginia Tech)

17:45 T-branes in G2 backgrounds - Gianluca Zoccarato (University of Pennsylvania)
3B
3B
16:30 - 18:00
Room: 4/3-006 - TH Conference Room
Contributions

16:30 Gravitational waves from axion clumps - Sichun Sun (Sapienza University of Rome)

16:45 Observing axion potentials through gravitational waves - Evangelos Sfakianakis (University of Illinois at Urbana-Champaign)

17:00 Wavefunctions and their implications on S^2 with flux and branes - Yoshiyuki Tatsuta (Waseda Univ.)

17:15 Matrix model and Yukawa couplings on the magnetized noncommutative torus - Honda Masaki (Waseda University)

17:30 Discrete Flavor Symmetries from Orbifold GUTs - Andreas Muetter (Technical University of Munich)

17:45 Classification of Left-Right Symmetric Heterotic String vacua - Benjamin Percival (liverpool)
Wednesday 26 June 2019
09:00 Distance Conjecture and Potentials - Eran Palti
Distance Conjecture and Potentials
- Eran Palti
09:00 - 09:30
Room: 500/1-001 - Main Auditorium I will discuss relations between the Swampland distance conjecture, and its generalisations, and potentials in string theory.
09:30 A discrete life in the swampland - Angel Uranga (IFT, Madrid)
A discrete life in the swampland
- Angel Uranga (IFT, Madrid)
09:30 - 10:00
Room: 500/1-001 - Main Auditorium I will discuss instances in which discrete identifications in field space (discrete symmetries, dualities and monodromies) interplay with the swampland conjectures.
10:00 Generic matter and global gauge group structure in 6D and 4D supergravity and F-theory models - Washington Taylor
Generic matter and global gauge group structure in 6D and 4D supergravity and F-theory models
- Washington Taylor
10:00 - 10:30
Room: 500/1-001 - Main Auditorium 6D supergravity and F-theory geometry provide compatible frameworks for a well-defined notion of genericity for matter representations. Generic matter types depend on global gauge group structure, giving insight in particular into the distinction between theories with gauge group SU(3) x SU(2) x U(1) and those with SU(3) x SU(2) x U(1)/Z_6.
10:30 Conference Photo
Conference Photo
10:30 - 10:45

10:45 Coffee break
Coffee break
10:45 - 11:00
Room: 500/1-001 - Main Auditorium
11:00 Inflation as an Information Bottleneck - Alexander Westphal (DESY Hamburg)
Inflation as an Information Bottleneck
- Alexander Westphal (DESY Hamburg)
11:00 - 11:30
Room: 500/1-001 - Main Auditorium We discuss how tools from information theory combined with machine learning a direct map from the microscopic parameters of a string inflation mechanism to the CMB observables allows us to systematically estimate the observable footprint of the theory uncertainty. We demonstrate this using the example mechanism of single-field axion monodromy inflation. We find that inflation acts as an information bottleneck, with a surprising number of microscopic parameters decoupling from the CMB observables.
11:30 Polarisation everywhere - Thomas Van Riet
Polarisation everywhere
- Thomas Van Riet
11:30 - 12:00
Room: 500/1-001 - Main Auditorium I discuss recent criticism related to controlled SUSY-breaking and the link with the Swampland program: I explain how anti-brane singularities have been a red herring and that supergravity by itself is sufficient to understand why. In particular this was not yet understood for anti-D6 branes. The role of brane polarisation is crucial in this regard. Loss of control over anti-branes potentially arises when there is a non-trivial interplay with moduli stabilisation and the literature on this problem is polarised as well. Finally I discuss the seemingly loosely related concept of weak gravity and cosmic censorship for which an analogy between scalar field polarisation with brane polarisation seems to suggest a potential analytic derivation of how cosmic censorship implies weak gravity.
12:00 The Flatness of Axionic Potentials and a 10d Approach to KKLT - Arthur Hebecker (Heidelberg University)
The Flatness of Axionic Potentials and a 10d Approach to KKLT
- Arthur Hebecker (Heidelberg University)
12:00 - 12:30
Room: 500/1-001 - Main Auditorium After a brief summary of some recent work on flat axionic potentials in the regime of subplanckian decay constants, I will turn to the controversial topic of a 10d description of the KKLT scenario. In particular, I will outline a proposal for completing the coupling of D7-brane gauginos to bulk fields. Building on this, I will then argue that the analysis of 10d Einstein equations appears to be consistent with the original 4d method of KKLT, including both the AdS vacuum and its uplift to metastable de Sitter.
12:30 Lunch
Lunch
12:30 - 15:00
15:00 The String Landscape, the Swampland, and the Observed Universe - Cumrun Vafa (Harvard University)
The String Landscape, the Swampland, and the Observed Universe
- Cumrun Vafa (Harvard University)
15:00 - 16:00
Room: 500/1-001 - Main Auditorium I review ideas related to the landscape of string vacua and restrictions it suggests on the existence of consistent quantum gravitational theories known as swampland conditions. Some implications for particle physics and cosmology are discussed.
16:00 Coffee break
Coffee break
16:00 - 17:00
Room: 500/1-001 - Main Auditorium

17:00 Guided tour AD
Guided tour AD
17:00 - 19:00

Guided tour CMS
Guided tour CMS
17:00 - 18:00

17:30 Guided Tour ALICE
Guided Tour ALICE
17:30 - 18:30

20:00 Dinner at Cercle du Rhone
Dinner at Cercle du Rhone
20:00 - 22:00
Thursday 27 June 2019
09:00 On Towers and Scalars - Luis Ibanez (Universidad Autonoma de Madrid (ES))
On Towers and Scalars
- Luis Ibanez (Universidad Autonoma de Madrid (ES))
09:00 - 09:30
Room: 500/1-001 - Main Auditorium We study three topics concerning the role of scalars and the distance conjecture in the Swampland program. First we discuss a Scalar Weak Gravity Conjecture (SSWGC). Solutions for the corresponding extremal equation are compatible with towers of winding and momenta states becoming massless for large fields. We show that this SSWGC implies the refined dS conjecture under certain particular conditions. Second, we show how in CY compactifications in Type II string theory towers of particles, strings and domain walls become massless(tensionlesss) for large values of the Kahler and complex structure moduli. Third, we propose to use modular symmetries in the scalar moduli space of string compactifications in trying to test the validity of swampland ideas in theories with N=0,1 SUSY. Modular invariance requires potentials to be divergent for large values of the moduli, forbidding global symmetries to arise.
09:30 String theory compactifications with sources - Alessandro Tomasiello (University of Milano-Bicocca)
String theory compactifications with sources
- Alessandro Tomasiello (University of Milano-Bicocca)
09:30 - 10:00
Room: 500/1-001 - Main Auditorium There has been progress in recent years on how to include backreacted O-planes in flux compactifications. After a quick review of such solutions in AdS, I will discuss the current situation for de Sitter.
10:00 Hope or No Hope for a String Landscape? - Savdeep Sethi (University of Chicago)
Hope or No Hope for a String Landscape?
- Savdeep Sethi (University of Chicago)
10:00 - 10:30
Room: 500/1-001 - Main Auditorium Whether string theory admits a multiverse of de Sitter solutions that look approximately like our universe is a hotly debated current topic. I will overview the basics of landscape constructions and explain my view on this question. I will also outline a possible construction of de Sitter solutions.
10:30 Coffee break
Coffee break
10:30 - 11:00
Room: 500/1-001 - Main Auditorium
11:00 Complexity and Random Matrix Approximations - James Halverson
Complexity and Random Matrix Approximations
- James Halverson
11:00 - 11:30
Room: 500/1-001 - Main Auditorium Efforts to better understand the landscape and swampland can be stifled by computational complexity. I will discuss ways in which complexity could be overcome by learning random matrix approximations to string data, including both opportunities and caveats. As a concrete example, generative adversarial networks will be used to learn random matrix approximations to certain Calabi-Yau data, and physical implications will be discussed.
11:30 Deep Reinforcement Learning and the Type IIA Landscape - Brent Nelson (Northeastern University)
Deep Reinforcement Learning and the Type IIA Landscape
- Brent Nelson (Northeastern University)
11:30 - 12:00
Room: 500/1-001 - Main Auditorium An artificial intelligence agent known as an asynchronous advantage actor-critic is utilized to explore type IIA compactifications with intersecting D6-branes. By reinforcement learning, the agent's performance in satisfying string consistency conditions, and finding Standard Model like configurations, is significantly improved. In one case, we demonstrate that the agent learns a human-derived strategy for finding consistent string models. In another case, where no human-derived strategy exists, the agent learns a genuinely new strategy that achieves the same goal twice as efficiently per unit time.
12:00 Dualities in and from Machine Learning - Sven Krippendorf (University of Oxford)
Dualities in and from Machine Learning
- Sven Krippendorf (University of Oxford)
12:00 - 12:30
Room: 500/1-001 - Main Auditorium Dualities play a key role in our understanding of dynamical systems appearing in effective field theories from string theory and in general in fundamental physics. Dualities in field theory and string theory are a tool to obtain models describing data at a precision beyond a level standard effective field theory techniques allow. At this stage these techniques are not used explicitly in machine learning. Based on examples, we identify data questions which are easily answerable in one duality frame but not in the other. Simple neural networks confronted with data in this favoured duality frame can answer data questions, in the other frame they cannot identify the correct answer. We then discuss the question whether a deeper neural network can learn this favourable dual data representation? We present how, based on feature separation, a dual representation, in this example a Fourier-like transformation, can be learned without knowing about its existence. We then discuss how this framework can be extended to apply to physical systems, in particular the 2D Ising model. We comment on potential uses for effective field theories from string theory.
12:30 Lunch
Lunch
12:30 - 14:30
14:30 1A
1A
14:30 - 16:00
Room: 500/1-001 - Main Auditorium
Contributions

14:30 Uplifting Runaways - Severin Luest (IPhT, CEA Saclay)

14:45 On non-perturbative effects and moduli stabilization from 10D - Ander Retolaza (IPhT CEA Saclay)

15:00 On gaugino condensation in ten dimensions - Pablo Soler (ITP Heidelberg)

15:15 Gaugino condensation and small uplifts in KKLT - Jakob Moritz (Deutsches Elektronen-Synchrotron DESY)

15:30 Scaling limits of dS vacua and the swampland - Christoph Roupec (TU Vienna)

15:45 Consistent truncation and de Sitter space from gravitational instantons - Robin Terrisse (Institut de Physique Nucléaire de Lyon)
2A
2A
14:30 - 16:00
Room: 503/1-001 - Council Chamber
Contributions

14:30 A Tower Weak Gravity Conjecture from Infrared Consistency - Stefano Andriolo (Hong Kong university of science and technology)

14:45 Supersymmetry Breaking Warped Throats and the Weak Gravity Conjecture - Ginevra Buratti (Instituto de Fisica Teorica (IFT) UAM-CSIC)

15:00 Swampland Variations on a Theme by KKLT - Daniel Klaewer (Max-Planck-Institut für Physik)

15:15 (Mis-)aligned Winding in and applying Genetic Algorithms to Type IIB String Theory - Andreas Schachner (Heidelberg University)

15:30 Infinite Distances and the Axion Weak Gravity Conjecture - Damian Van de Heisteeg (Utrecht University)

15:45 Instantons and Infinite Distances - Max Wiesner (IFT UAM-CSIC)
3A
3A
14:30 - 16:00
Room: 4/3-006 - TH Conference Room
Contributions

14:30 M5 branes and Theta Functions - Rui Sun (Yau mathematical science center, Tsinghua University)

14:45 Cosmological constant at finite string coupling in F-theory flux compactification - Hajime Otsuka (KEK)

15:00 Branes, quiver gauge theories and discrete symmetries - Jamie Rogers (Liverpool University)

15:15 Multi-field Inflation in High-Slope Potentials - Robert Rosati (University of Texas at Austin)

15:30 Triangulating the Landscape - Andres Rios (Cornell University)

15:45 What does Inflation say about Dark Energy given the Swampland Conjectures? - Jacob Leedom (University of California, Berkeley)
16:00 Coffee break
Coffee break
16:00 - 16:30
Room: 500/1-001 - Main Auditorium
16:30 1B
1B
16:30 - 18:00
Room: 500/1-001 - Main Auditorium
Contributions

16:30 The dS Swampland Conjecture, Non-BPS branes and K-theory - Max Brinkmann (MPI Munich)

16:45 Inflation and the Swampland Distance Conjecture - Marco Scalisi (KU Leuven)

17:00 Thraxions: Ultralight Throat Axions - Sasha Leonhardt (Heidelberg University)

17:15 Instantons Away From Equilibrium - John Stout (University of Amsterdam)

17:30 Effective multi-axion cosmology and constraints from black hole superradiance - Matthew Stott (King's College London)
2B
2B
16:30 - 18:00
Room: 503/1-001 - Council Chamber
Contributions

16:30 Local Heterotic Reductions - Eirik Eik Svanes (University of Oxford)

16:45 SCFT sectors in F-theory landscape - Yinan Wang (Mathematics, University of Oxford)

17:00 Topological formulae for line bundle cohomology - Andrei Constantin (University of Oxford)

17:15 Index Formulae for Line Bundle Cohomology on Complex Surfaces - Callum Brodie

17:30 The Calabi-Yau Hypersurface Landscape - Mehmet Demirtas (Cornell University)
Friday 28 June 2019
09:00 What’s new with G2? - Sakura Schafer-Nameki
What’s new with G2?
- Sakura Schafer-Nameki
09:00 - 09:30
Room: 500/1-001 - Main Auditorium
09:30 A 3-form exploration of the landscape - Luca Martucci (University of Padova)
A 3-form exploration of the landscape
- Luca Martucci (University of Padova)
09:30 - 10:00
Room: 500/1-001 - Main Auditorium I will discuss four-dimensional N=1 supergravity models including 3-form potentials and membranes. These provide a general framework to describe the EFTs of string/M-theory compactifications to four dimensions, in which (part of) the internal flux quanta arise as expectation values of the 4-form field-strengths and large portions of the landscape can be explored within a single EFT. The application to concrete string models unveils some interesting universal patterns.
10:00 Anomalies in various dimensions - Iñaki Garcia-Etxebarria
Anomalies in various dimensions
- Iñaki Garcia-Etxebarria
10:00 - 10:30
Room: 500/1-001 - Main Auditorium Anomalies are a powerful probe of the dynamics of field theories. In this talk I will discuss how to connect different anomalies in various dimensions, and describe some applications of these ideas in string model building.
10:30 Coffee break
Coffee break
10:30 - 11:00
Room: 500/1-001 - Main Auditorium
11:00 Moduli Stars and False Vacuum Bubbles - Fernando Quevedo (The Abdus Salam International Centre for Theoretical Physics)
Moduli Stars and False Vacuum Bubbles
- Fernando Quevedo (The Abdus Salam International Centre for Theoretical Physics)
11:00 - 11:30
Room: 500/1-001 - Main Auditorium
11:30 Landscape of F-theory Standard Models - Mirjam Cvetic (University of Pennsylvania)
Landscape of F-theory Standard Models
- Mirjam Cvetic (University of Pennsylvania)
11:30 - 12:00
Room: 500/1-001 - Main Auditorium We present key steps in explicit construction of a globally consistent F-theory compactifications with the exact chiral spectrum of the Standard Model with gauge coupling unification. All global consistency conditions can be reduced to a single geometric criterion on the base of the underlying elliptically fibered Calabi Yau fourfolds. For toric bases, this criterion only depends on an associated polytope and is satisfied for at least O(10^15) distinct bases. Further particle physics implications of these models are addressed.
12:00 String Phenomenology From a Worldsheet Perspective - Alon Faraggi (University of Liverpool)
String Phenomenology From a Worldsheet Perspective
- Alon Faraggi (University of Liverpool)
12:00 - 12:30
Room: 500/1-001 - Main Auditorium I argue that the ten dimensional non--supersymmetric tachyonic superstrings may serve as good starting points for the construction of viable phenomenological vacua. Thus, enlarging the space of possible solutions that may address some of the outstanding problems in string phenomenology. A tachyon free six generation Standard--like Model is presented, which can be regarded as an orbifold of the $SO(16)\times E_8$ heterotic--string in ten dimensions. I conjecture that any $(2,0)$ heterotic--string in four dimensions can be connected to a $(2,2)$ one via an orbifold or by interpolations and provide some evidence for this conjecture. It implies that any Effective Field Theory (EFT) model that cannot be connected to a $(2,2)$ theory is necessarily in the swampland, and will simplifies the analysis of the moduli spaces of $(2,0)$. I argue that at present level of understanding of string theory construction of vacua in which all the moduli are stable, including the cosmological constant, is futile. An example of a quasi-realistic model in which all moduli are fixed, aside from the dilaton is presented.
12:30 Lunch
Lunch
12:30 - 14:30
14:30 Flavour as probe of New Physics - Marco Nardecchia (CERN)
Flavour as probe of New Physics
- Marco Nardecchia (CERN)
14:30 - 15:00
Room: 500/1-001 - Main Auditorium
15:00 String axiverse and gamma-ray spectral modulation of galactic pulsars - Kiwoon Choi
String axiverse and gamma-ray spectral modulation of galactic pulsars
- Kiwoon Choi
15:00 - 15:30
Room: 500/1-001 - Main Auditorium I discuss first the possible range of axion scales and couplings in string axiverse, and then the possibility to explain the recently noticed spectral modulation of gamma-rays from some galactic pulsars by the axion-photon-dark photon mixing realized in axiverse scenario.
15:30 F-theory and Dark Energy - Jonathan Heckman
F-theory and Dark Energy
- Jonathan Heckman
15:30 - 16:00
Room: 500/1-001 - Main Auditorium
16:00 Coffee break
Coffee break
16:00 - 16:30
Room: 500/1-001 - Main Auditorium
16:30 Higher Spin Theories, AdS Distances and the Swampland - Dieter Luest (Munich-University)
Higher Spin Theories, AdS Distances and the Swampland
- Dieter Luest (Munich-University)
16:30 - 17:00
Room: 500/1-001 - Main Auditorium In this talk I discuss various aspects of higher spin theories in the context of the swampland.
17:00 Sypersymmetry breaking and the swampland - Emilian Dudas (Ecole Polytechnique)
Sypersymmetry breaking and the swampland
- Emilian Dudas (Ecole Polytechnique)
17:00 - 17:30
Room: 500/1-001 - Main Auditorium We investigate string models with broken supersymmetry from the viewpoint of swampland conjectures.
17:30 Unified Flavor- and CP-Symmetries from String Theory - Hans Peter Nilles (Univ. Bonn)
Unified Flavor- and CP-Symmetries from String Theory
- Hans Peter Nilles (Univ. Bonn)
17:30 - 18:00
Room: 500/1-001 - Main Auditorium We develop a new method to determine flavor symmetries within compactified string theory. A picture emerges where traditional (discrete) flavor symmetries, CP-like symmetries and modular symmetries combine to a unified flavor group. We observe the phenomenon of "local" flavor symmetries (with non-universality for various sectors of the theory) that opens up a new arena for flavor model building.