Conveners
Altas Energias: Paralela 1
- Mauricio Hippert (Brazilian Center for Research in Physics)
Altas Energias: Paralela 4
- Andre Asevedo Nepomuceno (Universidade Federal Fluminense)
Description
Sessão paralela da área Altas Energias
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Dr Emmanuel G. de Oliveira (IF-UFSC)03/12/2025, 14:00Paralela
Interactions of high-energy neutrinos with matter can be studied through the angular separation observed in dimuon production, an observable particularly sensitive to the transverse momentum dynamics of partons. In this work, we develop a Monte Carlo event generator based on the color dipole model, interfaced with Pythia8 for parton showering and hadronization simulations, to predict dimuon...
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Dr Carline Biesdorf (IF-UFSC)03/12/2025, 14:20Paralela
We investigate the influence of dark matter on hybrid stars. Using a two-fluid approach, where normal and dark matter components interact only gravitationally, we explore how dark matter can trigger the appearance of quark matter in neutron stars for unprecedented low masses. Our findings reveal that dark matter increases the central pressure of neutron stars, potentially leading to the...
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Luana Santana (UFPel)03/12/2025, 14:40Paralela
The inclusive $D^0$ and $B^0$ photoproduction in $p$Pb and PbPb collisions at the center - of - mass energies of the Large Hadron Collider (LHC) is investigated considering the color dipole S - matrix approach. The analytical expressions for the differential distributions are derived in the transverse momentum space and predictions for the rapidity and transverse momentum distributions are...
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Andre Asevedo Nepomuceno (Universidade Federal Fluminense)03/12/2025, 15:00Paralela
The baryon number violation is an essential ingredient for the preferential creation of matter over antimatter needed to account for the observed baryon asymmetry in the Universe. However, a process that violates baryon number has yet to be experimentally observed. The HIBEAM/NNBAR program is a proposed two-stage experiment at the European Spallation Source (ESS) to search for baryon number...
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Flávia G. Fialho (UNICID)03/12/2025, 15:20Paralela
Strong magnetic fields can be found in all systems where we believe the quark-gluon plasma is formed, such as the early universe, compact stars, and heavy-ion collisions. The most intense magnetic field estimated in the lab is in non-central heavy-ion collisions, which can reach up to 1019 G. The scale of the strong interaction is much larger than the electromagnetic interaction, and the...
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Mauricio Hippert (Brazilian Center for Research in Physics)04/12/2025, 14:00Paralela
We clarify how the weak-interaction-driven bulk viscosity ζ and the bulk relaxation time $\tau_\Pi$ of neutrino-transparent $npe$ matter depend on the nuclear symmetry energy. We show that, at saturation density, the equation-of-state dependence of these transport quantities is fully determined by the experimentally constrained nuclear symmetry energy S and its slope L. Variations of L within...
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Osvaldo Ferreira Neto (UFRJ)04/12/2025, 14:20Paralela
The origin of the matter-antimatter asymmetry remains a mystery despite many theoretical and observational efforts in the last decades. This is partially due to the difficulty in probing the early stages of the cosmic evolution (≈ 1 s or less). In particular, the baryon asymmetry, given by the ratio between the baryon number density and the total entropy, $b = n_B/s$, can be precisely...
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Adamu Issifu (ITA)04/12/2025, 14:40Paralela
Neutron stars (NSs), especially during their proto-neutron star (PNS) phase, offer a unique setting to probe non-annihilating dark matter (DM). We model the thermal and structural evolution of PNSs admixed with asymmetric DM using a two-fluid formalism where DM interacts with baryons only through gravity, considering both fermionic and bosonic candidates. Our results show a clear thermal...
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Davi Dionísio de Oliveira (IFUFF)04/12/2025, 15:00Paralela
We know that the only solution of the hydrodynamic equations that propagates in wave form, except for small perturbations, is shock waves. However, shock waves haven't been thoroughly studied in the ultrarelativistic limit. In the relativistic formulation of hydrodynamics, causality must be intrinsically preserved, which, as a consequence, limits the maximum group velocity of the theory [1]....
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Vinícius Franção04/12/2025, 15:20Paralela
The ultrarelativistic motion of charges in heavy-ion collisions is responsible for generating extreme electromagnetic fields, with magnetic fields of the order of 10$^{18}$G (for RHIC energies). However, the fields are very short-lived and their effects on the dynamics of the hot and dense matter produced in the collision are not well understood. In this work, we use a hybrid simulation chain,...
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