Conveners
Parallel Session 2: Neutrino Physics
- Diego ARISTIZABAL (Universite de Liege)
Parallel Session 2: Higgs Physics
- Edson Carquin Lopez (Federico Santa Maria Technical University (CL))
Parallel Session 2: Dark Matter
- Marcela González (Universidad Técnica Federico Santa María)
Parallel Session 2: Hadron Structure
- Taisiya Mineeva (UTFSM)
Parallel Session 2: Astroparticles
- Diego ARISTIZABAL (Universite de Liege)
Models with radiative neutrino masses and viable dark matter candidates usually have implications in all the frontiers of particle physics and astrophysics, like colliders signatures with (multi)leptons plus missing energy at the LHC, direct and indirect dark matter detection experiments, and neutrino oscillation experiments. In this talk I will review the status of the simplest models in...
The $\mu\tau$-reflection symmetry is a simple symmetry capable of predicting all the unknown CP phases of the lepton sector and the atmospheric angle but too simple to predict the absolute neutrino mass scale or the mass ordering.
We show that by combining it with a discrete abelian symmetry in a nontrivial way we can additionally enforce a texture-zero and obtain a highly predictive scenario...
We discuss the generation of neutrino masses from dimension seven 1-loop diagrams. We systematically analyse all possible d=7 1-loop topologies. There is a total of 48 topologies, but only 8 of them can lead to "genuine" d=7 neutrino masses. Here, we define genuine models to be models in which neither d=5 nor d=7 tree level masses nor a d=5 1-loop mass appear, such that d=7 loop is the...
The Jiangmen Underground Neutrino Observatory (JUNO) is a multi-purpose underground experiment under construction in south China. With 20 ktons of liquid scintillator, it will be the largest detector of this type ever assembled. Its primary goals are the determination of the neutrino mass hierarchy, the precise measurement of neutrino oscillation parameters, and the investigation of other rare...
TBD
The Two-Higgs-Doublet model (2HDM) is a simple and viable extension of the Standard Model with a scalar potential complex enough that two minima may coexist. In this work we investigate if the procedure to identify our vacuum as the global minimum by tree-level formulas carries over to the one-loop corrected potential. In the CP conserving case, we identify two distinct types of coexisting...
Guided us by the scenario of weak scale naturalness and the possible existence of exotic resonances, we have explored in a SO(5) Composite Higgs set-up the interplay among three matter sectors: elementary, top partners and vector resonances. We parametrise it through explicit interactions of spin-1 SO(4)-resonances, coupled to the SO(5)-invariant fermionic currents and tensors presented in...
We present the minimal model of electroweak baryogenesis induced by fermions. The model consists of an extension of the Standard Model with one electroweak singlet fermion and one pair of vector like doublet fermions with renormalizable couplings to the Higgs. A strong first order phase transition is radiatively induced by the singlet- doublet fermions, while the origin of the baryon asymmetry...
TBD
Probing light dark matter via direct detection is impeded by the low energy carried by light dark matter particles. I will present ways that can bypass the kinematic limitations thus enabling direct detection experiments to probe dark matter candidates in the sub-GeV region using certain inelastic channels, as well as dark matter particles that have been accelerated to high momenta after...
We report on the latest searches for low mass states predicted in several New Physics models performed with the data collected by the BaBar detector at the PEP-II $e^+e^-$ collider.
In particular, we search for single-photon events in a sample corresponding to 53 fb$^{−1}$ of $e^+e^− $ collision data. We look for events with a single high-energy photon and a large missing momentum and energy,...
TBD
We present a new method to interpret the γ-ray data of our inner Galaxy as measured with the Fermi Large Area Telescope (Fermi LAT). We train and test convolutional neural networks with simulated Fermi-LAT images based on models tuned to real data. We use this method to investigate the origin of an excess emission of GeV γ-rays seen in previous studies. Interpretations of this excess include γ...
Baryon spectroscopy began in 1952 with the discovery of the first Δ resonance by Fermi and collaborators. By the mid-1980s a sizeable collection of resonances had been identified in pion-Nucleon scattering, and particle physics left this field for higher-energy pastures, confident that a basic understanding of the Nstar spectrum was at least close, if not exactly in hand. With time,...
Since the discovery of the EMC effect over 30 years ago, it’s been of great theoretical interest and studied in several experimental measurements. No unified picture arose to explain the underlying cause of per nucleon structure function modification in nuclei. Precise measurements on light nuclei from JLab’s 6 GeV era revitalized this research by showing that traditional A or density...
The A2 Collaboration in the Crystal Ball/TAPS experiment at the MAMI accelerator
facilty in Mainz, Germany has a diversi?ed research program using real photons. The
Crystal Ball/TAPS setup has the ability to provide almost full coverage in solid angle and
is well suited to detect multi particle ?nal states. The experiments use high intensity circu-
larly, linearly, or unpolarized photon beams...
Nucleon polarisabilities are fundamental structure observables, like mass
or charge, which are sensitive to the internal quark dynamics of the nucleon.
Polarised Compton scattering off the proton can be used to study the polarisabilities
of the proton, thus probing the internal structure of the proton.
Scalar terms quanitify the response of the proton’s structure to an applied
electromagnetic...
We present angular diameter distance measurements obtained by locating the
BAO scale in the distribution of galaxies selected from the first year of Dark
Energy Survey data. We consider a sample of over 1.3 million galaxies
distributed over a footprint of 1318 deg$^2$ with $0.6 < z_{\rm photo} < 1$ and
a typical redshift uncertainty of $0.03(1+z)$. This sample was selected using a...
HAWC is an array of 300 large volume water Cherenkov detectors spread over an area of 20,000 square meters situated at 4,100 m altitude in the mountains of central Mexico. It detects continuously TeV air showers over a large field of view of 2 sr observing 2/3 of the sky each day and is able to separate gamma rays from cosmic rays utilizing the differences between electromagnetic and hadronic...
Lorentz Invariance Violation (LIV) has been investigated by several theories and tested by numerous experiments. Ultra-high energy cosmic rays (UHECR) are the most energetic particles known in the Universe and, since LIV is supposed to be suppressed in lower energies, they have been proposed as a suitable test for LIV. The Pierre Auger Observatory is the largest observatory designed to detect...
NA61/SHINE is a fixed target experiment designed to study
hadron-proton, hadron-nucleus and nucleus-nucleus interactions at the
CERN Super-Proton-Synchrotron. In this contribution we will discuss
results from pion-carbon collisions recorded at beam momenta of 158
and 350 GeV/c. Hadron production measurements in this type of
interactions is of fundamental importance for the understanding of...
The CSES mission is a sophisticated multi-channel space observatory for seismic phenomena. It looks for correlation between electromagnetic perturbations, plasma density transients and charged particle flux variations. The HEPD is the CSES instrument sensitive to charged particles in the range of 30-300 MeV/nucleon (10-150 MeV for electrons). It is also an extremely precise detector to study...
Radiatively induced neutrino masses via dark matter interactions link two different physical phenomena that separately require physics beyond the Standard Model. In addition to having a dark matter particle candidate, these scenarios provide a natural explanation for the smallness of neutrino masses compared to the electroweak scale. We investigate the framework where the new physics that...
