Conveners
Plenary: Welcome
- There are no conveners in this block
Plenary
- Session Chair: Marco Fedele
Plenary
- Session Chair: João Penedo (University of Lisbon)
Plenary
- Session Chair: Markus Prim
Plenary
- Session Chair Rachel Houtz
Plenary
- Session Chair: Per Osland
Plenary
- Session Chair: Tomas Gonzalo (KIT)
Plenary
- Session Chair: Michael De Nuccio (University of British Columbia)
Plenary
- Session Chair: Stefan Schacht ( University of Manchester)
Plenary
- Session Chair: Chara Kitsaki
Plenary
- Session Chair: Maria Laura Piscopo (University of Siegen)
Plenary
- Session Chair: Marcel Hohmann (University of Melbourne)
Plenary
- Session Chair: Syuhei Iguro
Plenary
- Session Chair: Margarida (Gui) Rebelo
Plenary: DISCRETE 2024
- Session Chair: Margarida (Gui) Rebelo
We report the status of the KOTO experiment at J-PARC to
search for the decay $K_L\to\pi^0\nu\overline{nu}$. The decay is sensitive to new
physics beyond the standard model because the standard model process is highly
suppressed in the decay. The branching ratio is $3\times 10^{-11}$ with small
theoretical uncertainty in the standard model. We set an upper limit of the
branching ratio at...
In this talk, I will discuss discrete Goldstone bosons
(dGB's), light particles arising from spontaneously broken exact discrete
symmetries. These dGB's are guaranteed to have nonzero masses, while the
associated discrete symmetry protects them from quadratically divergent mass
contributions. The nonzero masses of dGB's arise directly from the discrete
symmetry, without requiring an explicit...
An overview of the recent CP violation measurements in charm and beauty decays is presented, and an updated determination of CKM angle gamma, charm mixing, and CP-violation parameters using the LHCb measurements.
.Hints for the violation of lepton flavour universality (satisfied within the SM) have accumulated in recent years. In particular, deviations from the SM predictions were observed in semi-leptonic B decays (b->sll and b->ctau), in the anomalous magnetic moment of the muon (g-2), in leptonic tau decays and di-electron searches. Furthermore, also the deficit in first row CKM unitarity, known as...
There are many astrophysical observations and cosmological evidence for the existence of dark matter (DM), but little is known of its particle nature. The Standard Model (SM) does not predict its existence, however, numerous theories beyond the Standard Model (BSM) provide viable candidates for DM. Common candidates in many of these theoretical models are the weakly interacting massive...
The ALPHA experiment at CERN is designed to perform precision measurements of the properties of antihydrogen - the antimatter counterpart of the hydrogen atom. The so-called ALPHA-2 apparatus is dedicated to antihydrogen spectroscopy. Its goal is to test the CPT invariance, a fundamental symmetry of the Standard Model, which requires that the spectra of hydrogen and antihydrogen be identical....
I discuss the usefulness of symmetries in the study of Multi Higgs Doublet Models.
The KATRIN experiment aims to measure the neutrino mass by precision spectroscopy of tritium β-decay. Recently, KATRIN has improved the upper bound on the effective electron-neutrino mass to 0.8 eV/c² at 90% confidence level [1] and is continuing to take data for a target sensitivity of 0.2 eV/c².
In addition to the search for the neutrino mass, the ultra-precise measurement of the β-spectrum...
I discuss the application of modular invariance to the flavour problem from a (mostly) bottom-up perspective. In this framework, Yukawa couplings and mass matrices are obtained from modular forms, which are functions of a single complex number: the modulus VEV $\tau$. This VEV can be the only source of symmetry breaking, so no flavons need to be introduced. When $\tau$ is close to special...
The framework of compactified heterotic string theory offers consistent UV completions of the Standard Model of particle physics. In this approach, the existence of flavor symmetries beyond the Standard Model is imperative and the flavor symmetries can be derived from the top down. Such a derivation uncovers a unified origin of traditional discrete flavor symmetries, discrete modular flavor...
In this presentation, I will provide an overview on the current knowledge
on the unitarity of the CKM matrix and its constraining power on new
physics contributions. I will further review the current knowledge on the
determination of $V_{ub}$ and $V_{cb}$, whose values constrain together with the
CKM angle $\gamma / \phi_3$ constrain the apex of the unitary triangle. Several
new measurements...
The discovery of neutrino oscillations is the first laboratory evidence of New Physics beyond the Standard Model.
Oscillating neutrinos necessarily imply that neutrinos are massive and that (neutral) lepton flavour is violated.
A signal of charged lepton flavour violation (cLFV) however so far eludes experimental discovery.
In this talk I will review some phenomenological implications of...
The space-borne interferometer LISA will be sensitive to a variety of mechanisms sourcing gravitational waves in the late and early universe. In this talk we present the status of the LISA mission and summarize the science that LISA will achieve. We discuss in some detail the measurements that will allow LISA to probe BSM physics and cosmology. Particular attention will be dedicated to the...
After broad introduction on ultralight DM, I will briefly
discussed issues associated on quality problem and the interplay between
equivalence principle tests of ultralight DM and direct searches through the
oscillation of energy levels, and then I'll demonstrate the potentially surprising
result that oscillation of energy levels would provide us with possibly the best
bound on QCD-axion...
Parity as prime example of left-right symmetry, is at the core of discrete symmetries, the first one that a child sees. It has played a fundamental role in the development of weak interactions, first with the V-A effective theory and then in the construction of the Standard Model. I show first how the maximal breaking of parity in beta decay was crucial in Weinberg’s classic 1967 paper that...
Permanent electric dipole moments probe the joint violation of parity and time-reversal symmetries, collecting many potential sources into a single low-energy observable. Although the Standard Model predicts finite values in many systems, these are too small for present-day experiments to detect.
Experimental results consistent with zero are thus interpreted, via the CPT theorem, as...
Scattering and decay processes of thermal bath particles in
the early universe can dump relativistic axions in the primordial plasma. If
produced with a significant abundance, their presence can leave observable
signatures in cosmological observables probing both the early and the late
universe. In this talk, I will focus on the QCD axion and I will present recent and
significant improvements...
We propose a novel mechanism for the production of dark matter (DM) from a thermal bath, based on the idea that DM particles $\chi$ can transform heat bath particles $\psi$: $\chi \psi \to \chi \chi$. For a small initial abundance of $\chi$ this leads to an exponential growth of the DM number density. We demonstrate that this mechanism complements freeze-in and freeze-out production in a...
The fundamental nature of dark or invisible matter remains
one of the great mysteries of our time. A leading hypothesis is that dark matter is
made of new elementary particles, with proposed masses and interaction cross
sections spanning an enormous range. Amongst the technologies developed to
search for dark matter particles, two-phase (liquid and gas) xenon time projection
chambers are...
One of the most important achievements in the field of particle physics was the discovery of neutrino oscillations. This implies the massive nature of neutrinos and in turn points to the existence of physics Beyond the Standard Model. In this talk I will chiefly focus on several strategies to probe new physics with neutrinos. First and foremost, I will discuss some classes of neutrino mass...
This talk will give an overview over axions as dark matter and ways to detect them.
Cold antihydrogen, the bound state of an antiproton and a positron, is an ideal laboratory to test the fundamental CPT symmetry, one of the cornerstones of the Standard Model (SM) of particle physics, by comparing its energy levels to ordinary hydrogen. Hydrogen is one of the best studied atoms experimentally, the two best-known transitions being the 1S-2S two-photon transition and the...
Quantum correlations are the cornerstone of quantum information theories. Profiting from the non-classical behaviour of a system opens new possibilities but also requires dedicated algorithms, simulations, and even infrastructures to be used. In this talk, the application of such quantum correlations (including the entanglement) for various systems, which can and are used in different fields,...
