One of the first proposed signatures of QGP formation in heavy-ion collisions is the enhanced production of strange hadrons compared to non-strange ones.
Recent measurements in high-multiplicity proton-proton (pp) and proton-lead (p-Pb) collisions have exhibited features reminiscent of those observed in lead-lead (Pb-Pb) collisions. Among others, the observed enhancement of strange...
The ALICE experiment is dedicated to studying the hot and dense nuclear matter created in heavy-ion collisions at the Large Hadron Collider. A crucial part of the ALICE physics programme is to study small collision systems, such as proton-proton and proton-lead collisions and compare them with the heavy-ion ones in order to disentangle effects coming from individual nucleon-nucleon...
Light flavor hadron production has been studied over the last years in pp, p-Pb, and Pb-Pb collisions. In 2017, the ALICE Collaboration collected data from the collisions between Xenon nuclei at center-of-mass energy per colliding nucleon pair of 5.44 TeV. Such medium-sized nuclei offer the opportunity to reach multiplicities covering the gaps between Pb-Pb and pp collisions, thus contributing...
We present a dark fluid model described as a non-viscous, non-relativistic, rotating, and self-gravitating fluid. We assumed that the system has spherical symmetry and the matter can be described with the polytropic equation of state. The induced coupled non-linear partial differential equation system was solved by using a self-similar time-dependent ansatz introduced by L. Sedov and G. I....
In this talk I will first present a review of the state-of-the-art physics of compact stars and then discuss the possibility of detecting dark mattermin their interior or in their vicinity. As an application I will consider the uniform rotation of compact stars admixed with dark matter, which also feature an extended halo. As a particular example I will discuss the rotation of such compact...
Examining the properties of stellar populations in and around the Milky Way is a crucial step towards the understanding of galactic evolution. Gaining insight into this process can provide us valuable information about the large-scale and long-term characteristics of both ordinary and dark matter. In this study we focused on the spectroscopic aspect of this investigation, by looking into how...
The theoretical prediction for the W-boson mass ($M_W$) is sensitive to physics beyond the standard model (BSM). Currently, there is a $2\sigma$ discrepancy between the standard model (SM) theoretical prediction and the measured value of $M_W$, obtained from the LEP 2, Tevatron and LHC experiments. Considering also the recent measurement of $M_W$ with the CDF II detector, the discrepancy is...
In spontaneuosly broken scalar theories perturbative and semi-classical calculations show that multi-particle production grows rapidly with the number of scalar particles at sufficiently high energies. According to recent computations, for $ \lambda n \gg 1 $, where $ n $ is the multiplicity and $ \lambda $ is the self-coupling, the amplitude grows exponentially with the energy, resulting in...
In this talk, I will discuss the so-called $t$-channel singularities that may occur when a given $t$-channel scattering process is mediated by a massive, stable particle on its mass shell.
After providing conditions for the singularity to occur and presenting several examples of SM and BSM processes afflicted by the issue, I will describe a regularization method based on thermal field...
Quarkonium bound states are especially promising candidates to test the probable quantum structure of space-time, since they represent a system with reasonably small characteristic distance. The quantum mechanical interaction between the quarks is heuristically described by the Cornell potential. Here, we insert this system in a 3-dimensional rotationally invariant space which is composed of...
The coming runs of pp collisions at the LHC will significantly better the statistics, and later in the 30's in much increased pseudorapidity range will open the possibilities to measure rare probes .but also will offer an opportunity to measure in much details the transverse momentum spectra and other parameters like the anisotropic flow, HBT radii etc. In the present talk I will report on the...
I present our study of the transverse momentum spectra and their evolution in function of the position of the azimuthal of the particles associated to the leading particle in this talk. Additionally, the behavior of the spherocity distribution in the same azimuthal bins is reported. The studies were made using proton-proton collisions at $\sqrt{s}$ = 13 TeV using PYTHIA8 Monte Carlo event...
The neutral Standard Model Higgs boson was discovered in 2012 at CERN, and the search for further particles of extended models continues. In particular, the search for an Axion-Like-Particle (ALP). Using machine learning technologies, this analysis addresses the separation of ALP production from unwanted background reactions. In this project, the Run-2 data from the ATLAS detector are used and...
Gravitational waves offer an exciting chance to study dense matter and challenge theoretical models of dense EoS (Equations of State). A common class of models in dense matter, the standard NJL model, has the known problem that the speed of sound fails to approach the conformal limit. We investigate how a dynamical chiral quark model, which implements non-local interactions among quarks, can...
Heavy quark factories, nowadays in operation, produce a large amount of data on heavy hadron decays. These enable us to extract various Standard Model parameters and also open discussion about new physic and exotic states. Theoretical predictions need, because of the quark confinement, to account for hadronic effects, which is difficult to do from first principles. We use the confined...
