Supergravity and string based models typically contain hidden sectors. We discuss the physics of hidden sectors and how they affect analyses of phenomena related to particles and cosmology
It is known that there is huge hierarchy among the masses of quarks and leptons, and the lepton mixing is drastically different from quark mixing. The origin of fermion masses and flavor mixing is a longstanding puzzle of SM. Modular symmetry is a promising approach to address the flavor puzzle. This approach can overcome the drawbacks of traditional flavor symmetry, and it allows to explain...
Common lore suggests that effects of quantum gravity are difficult to unravel. The Planck scale is in fact about 14 orders of magnitude above the highest energy reached on Earth, namely at the Large Hadron Collider. In this talk, I will show that the quantum gravity cut-off can decrease in certain situations thus making quantum gravity effects accessible at energies lower than the Planck...
The latest SUSY/BSM related searches and hints/anomalies in CMS
An overview of anomalies identified in ATLAS searches for new physics phenomena will be presented.
The LHCb experiment conducts a wide programme of measurements which indirectly probe physics beyond the standard model. Rare decays of beauty and charm quarks which proceed via flavour-changing neutral currents are particularly sensitive to new physics at the TeV scale and above. This talk will describe recent LHCb analyses of rare B and D meson decays to muons that have particular sensitivity...
In this talk, we focus on the TeV scale B−L extension of the Minimal Supersymmetric Standard Model (BLSSM), which naturally incorporates a seesaw mechanism for generating light neutrino masses. Our emphasis will be on exploring the various phenomenological implications of this class of models.
I present a brief overview of SUSY phenomenology: where theory
intersects with experiment. Three areas are addressed: 1. indirect effects
including g-2, B-decays, EDMs; 2. dark matter signatures featuring
thermally produced WIMPs and non-thermal SUSY dark matter including
axions and light moduli; and 3. collider signatures featuring standard
LHC searches which then confront the...
The anomalous magnetic moment of the muon is one of the most sensitive probes of physics at the weak scale. Its current measurement presents a 4.2 sigma deviations from the Standard Model prediction, what is an exciting hint of physics beyond the Standard Model. However, such a prediction is subject to theoretical and experimental uncertainties, coming mainly from the hadronic vacuum...
For those interested in connecting string theory to observational physics, the asymptotic limits of string theory moduli space represent one of the most interesting regions. This talk explores these limits from two distinct directions: first, surprising results concerning (integer) conformal dimensions in scenarios with moduli stabilised in these asymptotic regimes and second, the cosmology of...
A brief review of model building in F-theory will be presented. Next, some recent insights into the flux induced superpotentials of the moduli fields will be discussed.
In this talk I will consider the string theory axiverse in type IIB Calabi-Yau orientifold compactifications, and focus on the computation of axion photon couplings and hierarchies that arise in the many axion limit — i.e. at large values of $h^{1,1}$. In particular, I will discuss two distinct phenomena that hierarchically suppress axion photon interactions when the QED divisor is small: the...
I will attempt to review some recent directions in theoretical studies of dark matter candidates, underlying models, production mechanisms, etc., focusing primarily on WIMPs and axions. Next, I will discuss sensitivity of the ensuing properties of dark matter candidates on underlying assumptions and illustrate this with the case of axions produced in nonstandard cosmologies of the Big Bang.
Supersymmetry (with R-parity conservation) provides a natural dark matter candidate. In models with gravity mediated supersymmetry breaking, the discovery of the Higgs boson with mass 125 GeV and the lack of discovery of supersymmetric particles at the LHC heavily constrains this framework for dark matter. The current status will be reviewed. Supergravity may also play an important role in...
The nature of dark matter is one of the most important questions in fundamental physics. The talk will cover potential explanations, related experiments together with their latest results and potential for the future.
Cosmological relaxation of the electroweak scale via Higgs-axion interplay, named as relaxion mechanism, provides a dynamical solution to the Higgs mass hierarchy. I will review the status of the proposal and
will show that the relaxion can naturally explain the observed dark matter density in the universe.
In addition to the supersymmetric vacua in 10 dimensions, heterotic-string theory gives rise to non-supersymmetric vacua that are in general contain physical tachyons in compactifications to 4 dimensions, which can be projected out by the GSO projections, and produce string amplitudes that are finite at one—loop. Over the past few years, in collaboration with Viktor Matyas and Ben Percival, we...
Modular transformations of string theory are shown to play a crucial role as discrete flavor symmetries of the Standard Model. They include CP transformations and provide a unification of CP and traditional flavor symmetries within the framework of the eclectic flavor scheme. The unified flavor group is non-universal in moduli space and exhibits the phenomenon of "Local Flavor Unification"...
Grand Unified Theories (GUTs) aim to unify all three fundamental interactions including electromagnetic, strong and weak interactions. A well-known phenomenological prediction of GUTs is proton decay, which sets a strong constraint to GUTs due to its null observation. On the other hand, masses and mixing of quarks and leptons are correlated since all fermions are arranged in the same...
Modified (the higher-derivative) supergravity models of cosmological inflation are introduced by extending the Starobinsky model of inflation to supergravity and including production of primordial black holes, in agreement with current precision measurements of the cosmic microwave background radiation. It leads to multi-field inflation, dark matter genesis as primordial black holes, and...
Particles that interact with the standard-model very weakly, or only gravitationally, may be created merely by the expansion of the universe. This mechanism may produce dark matter and be used to limit the properties of particles beyond the standard model.
High energy cosmic neutrinos are generated by the interactions of cosmic rays with matter & radiation, so their spectrum extends up to ZeV energies. The detection of cosmic neutrinos up to multi-PeV energies by the IceCube Neutrino Observatory at the South Pole has thus provided a novel laboratory for fundamental interactions, complementary to collider experiments. The measured cross-section &...
Motivated by the expected future progress in long-lived particle searches there has been a lot of activity recently from theorists studying models for LLPs. This talk concentrates on LLPs motivated by the observed smallness of neutrino masses. Examples are simple heavy neutral lepton models, motivated by different variants of the seesaw, or also supersymmetric models with R-parity violation....
In 2005 I gave a talk at SUSY provocatively titled Neutr - the only Observed Ino (So Far). So far it still is. I will give a brief survey the progress made since 2005 and the prospects for further progress by future projects.
SModelS is a public tool for the fast reinterpretation of LHC searches for new physics on the basis of (mostly SUSY) simplified-model results. The latest version is v2.3, released in May 2023. In this talk, I will present some major novelties of the SModelS v2 series, in particular the database update with a large number of full-luminosity Run2 results, the treatment of signatures with...
Flavor has been traditionally seen as a problem for supersymmetric theories, "the flavor problem". Still, the Standard Model is not immune to this problem, also Yukawa couplings should be naturally O(1).
Flavor symmetries are used to explain the structure of Yukawa couplings and, simultaneously, of soft-breaking couplings in supersymmetric theories. In this scenario, SUSY can help to...
The neutrino oscillation studies of the last decades have brought neutrinos to the center of particle physics, leaving an important legacy for new physics. I will briefly review the status of precision neutrino results and comment on the insights they bring into the basic drawbacks of the Standard Model such as the origin of neutrino mass, the flavour problem and dark matter.
I present a general formalism for multiple moduli and their associated modular symmetries, then apply it to examples based on finite modular symmetries, leading to viable and predictive modular flavour models.
Higher symmetries in quantum field theory are novel concepts of symmetry that involve extended operators such as Wilson lines in gauge theory. We briefly review this formalism and then discuss recent applications to particle physics, including an organizing principle for unification models and instanton effects. Finally, we discuss how higher symmetry violation can lead to simple models of...
String theory provides a powerful framework for generating and studying strongly coupled quantum field theories, including so-called “non-Lagrangian” theories that have no weak coupling limit. In this talk, I will summarize recent developments regarding dual descriptions of a class of strongly interacting 4d N=2 superconformal field theories that arise from string theory. I will highlight how...
I will argue on the possibility that the smallness of some physical parameters signals a universe at a large distance corner in the string landscape of vacua. Such parameters can be the scales of dark energy and supersymmetry breaking, which should then be tied to a large `dark' dimension at the micron scale. I will discuss the theoretical framework and some of its main physical implications.
Dark Matter constitutes more that 80% of the total amount of matter in the Universe, yet almost nothing is known about its nature. A powerful investigation technique is that of searching for the products of annihilations of Dark Matter particles in the galactic halo (and beyond), on top of the ordinary cosmic rays.
If a few anomalies still exist (notably the GeV GC gamma-ray excess), most...
The Next-to-Minimal Supersymmetric Extension of the Standard Model (NMSSM) is a well motivated supersymmetric extension beyond the minimal version, the MSSM. It solves the mu-problem and relaxes somewhat the tension in achieving the measured value of the Standard Model (SM)-like Higgs boson mass value. In this talk, I will address precision predictions for the NMSSM Higgs sector as well as the...
The Weak Gravity Conjecture proposes that in any effective theory that can be consistently coupled to gravity, gravity must be the weakest force. I will review recent work on understanding this idea in anti-de Sitter space using holography. In particular, I will show that a certain formulation of the Weak Gravity Conjecture can be mapped to convexity properties of operators which are charged...
In the context of string compactification, classifying possible gauge theories coupled to supergravity is intrinsically linked to classification problems in geometry. In this talk I will briefly review known bounds on the topology of CY manifolds and gauge fields over then. The field theory implications of these contraints can play an important role in characterizing both 4-dimensional N=2 and...
By studying M-theory on singular non-compact special holonomy spaces X we demonstrate, via a process of cutting and gluing of singularities that extend to the boundary of X, the appearance of 0-form, 1-form and 2-group symmetries in the resulting supersymmetric quantum field theory. We study the fate of these symmetries when these spaces become compact by employing sophisticated gluing...
Genetic Algorithms (GAs) are some of the most simple and effective search methods. In this talk I will demonstrate and review their effectiveness in various applications in BSM physics, including string searches, cosmology and phenomenological searches. For the latter I will emphasize the untapped potential for combining GAs with other search methods.
I will discuss the possibility of non-minimal flavour violation the supersymmetric theories. Focussing on the sector of squarks, after a general introduction, I will review recent results covering both the implementation within grand unified theories and TeV-scale phenomenology.
Ten years of LHC Higgs data indicate that the properties of the observed Higgs boson are consistent (within the precision of the experimental data) with the predictions of the Standard Model (SM). Thus, any viable supersymmetric extension of the SM must incorporate a SM-like Higgs boson. This can be achieved either via the decoupling limit (where all additional Higgs scalars have masses...
I discuss computer tools for SUSY collider phenomenology, recent developments and applications.
I will discuss perspectives on the future of supersymmetry.
I will announce the next SUSY conference at the IFT in Madrid (Spain).
