Calendar

Apr
10
Mer
Constraining dark matter properties with cosmological structure formation (Prof Matteo Viel (SISSA)) @ Aula 501
Apr 10@2:00 pm–3:00 pm

Physics Colloquia

I will review constraints on dark matter nature like, i.e. the dark matter free streaming, in the context of structure formation by using hydrodynamical simulations and observational data sets. In particular, I will focus on ordinary matter that does not shine in between galaxies: the intergalactic medium.
I will show that the most competitive constraints on warm dark matter (with a non-negligible free streaming) can be obtained from the main manifestation of the intergalactic medium, the so-called Lyman-alpha forest produced by neutral hydrogen in the filamentary cosmic web.
Moreover, I will show quantitative constraints on neutrino masses, comment on other dark matter scenarios (scalar dark matter, dark matter interacting with baryons or radiation) and assess the prospects of 21cm intensity mapping in addressing dark matter nature.

Apr
17
Mer
New frontiers in Neutrino Cosmology (Ilaria Archidiacono, UniMi) @ Aula 501
Apr 17@2:00 pm–3:00 pm

Seminario Fenomenologia delle Particelle

Investigating neutrino physics through observations of the Universe is crucial for addressing open questions in both cosmology and particle physics.
After reviewing current cosmological constraints on neutrino properties, I will show the potential of forthcoming large-scale structure data from the ESA Euclid mission to detect the neutrino mass sum and provide insights into the existence of light particles beyond the Standard Model.​​
I will also discuss how non-standard neutrino interactions, which may help to resolve the Hubble constant tension, can be constrained with future cosmological data.

Per connettersi a zoom:

https://infn-it.zoom.us/j/93341311520?pwd=RklTcFFVWjdtUzR5TUZKM3V1TjJiQT09

Apr
24
Mer
Exotic hadrons and hybrid KT-factorization (Alessandro Giachino, Departamento de Física Teórica and IFIC, Centro Mixto Universidad de Valencia-CSIC Institutos de Investigación de Paterna)) @ Aula 501
Apr 24@2:00 pm–3:00 pm

Seminario di Fenomenologia delle particelle

Abstract:
Exotic hadron spectroscopy is a hot field since it has experienced a very productive period in the past 20 years, especially in the last years, in which new discoveries and/or new evidences of exotic states are published every three-four months. The outlook for the coming decades is that it will continuously grow thanks to the increasing interest from both the theoretical and the experimental sides of the scientific community, as witnessed by the large amount of literature on this field.

In the first part of the talk, some of the main experimental findings and theoretical predictions given before the experimental discoveries, regarding fully charm tetraquarks and pentaquarks, will be presented and discussed.
In the sector of fully charm pentaquark states, I will provide an outline of both the compact pentaquark description [1] and the description based on the coupling between the meson-baryon channels and the 5-quark core channels for the nonstrange [2,3] and the strange sector [4], and I will compare the predictions of these models with the experimental data.
In the sector of fully charm and fully bottom tetraquarks, I will present the calculation of $0^++$ and $2^++$ fully heavy tetraquark decay widths and branching ratios within the vector meson dominance model in the fully bottom [5] and fully charm sector [6] and compare the results with the recent experimental data.

In the second part of the talk, I will show a new method to compute the virtual contributions in KT-factorization [7,8]. As I will explain, this new formalism is a fundamental step to bridge the gap between the lowest order calculations and the NLO corrections in hybrid kT-factorization, thus being relevant for a more precise description of the experimental data in the rich field of forward physics.

[1] E. Santopinto and A. Giachino, Phys. Rev. D 96, 014014 (2017).
[2] Y. Yamaguchi, A. Giachino, A. Hosaka, E. Santopinto, S. Takeuchi and M. Takizawa, Phys. Rev. D 96, 114031 (2017)
[3] Y. Yamaguchi, H. Garcìa-Tecocoatzi, A. Giachino, A. Hosaka, E. Santopinto, S. Takeuchi and M. Takizawa, Phys. Rev. D 101, 091502 (2020).
[4] A. Giachino, A. Hosaka, E. Santopinto, S. Takeuchi, M. Takizawa, Y. Yamaguchi, Phys. Rev. D 108, 074012 (2023).
[5] C. Becchi, A. Giachino, L. Maiani and E. Santopinto, Phys. Lett. B 806, 135495 (2020)
[6] C. Becchi, J. Ferretti, A. Giachino, L. Maiani and E. Santopinto, Phys. Lett. B 811, 135952 (2020).
[7] E. Blanco, A. Giachino, A. van Hameren, P. Kotko, Nucl. Phys. B 995 (2023).
[8] A new subtraction scheme at NLO exploiting the privilege of kT-factorization, A. Giachino, A. van Hameren and G. Ziarko, e-Print: 2312.02808, submitted to JHEP.

Per connettersi a zoom:

https://infn-it.zoom.us/j/93341311520?pwd=RklTcFFVWjdtUzR5TUZKM3V1TjJiQT09

Mag
8
Mer
Climate change: from science to action (Dr Elisabetta VIGNATI (Head of Unit and Deputy Director Joint Research Centre Directorate C, Energy, Mobility and Climate Clean Air and Climate Unit))
Mag 8@2:00 pm–3:00 pm

Physics Colloquia
Abstract:
Climate change is one of the most challenging global issues that humankind faces. The earth average surface temperature has risen more than 1 degree since the pre-industrial time and 2023 was the warmest year since 1880, year when modern measurement records began. The basic chemistry and physics of climate change have been understood for more than a century and effects already well documented. Science and research have significantly improved our understanding of the causes and our response options: human activities are estimated to have caused the temperature increase since pre-industrial time and global warming is projected to increase if substantial and sustained actions to reduce the human impact are not taken soon. Exploring the pivotal role of science in shaping international and European climate change policy, we delve into the dynamic interplay between scientific advancements and policy decisions as the scientific community’s influence is undeniable, driving evidence-based strategies that navigate the complex challenges of climate change.

Mag
29
Mer
TBA (Florian Beutler, Edinburgh)
Mag 29@2:00 pm–3:00 pm