In quantum chromodynamics (QCD), perturbation theory cannot always be employed in order to compute observables, due to the energy-dependent nature of the strong coupling constant, particularly in the low-energy regime where quarks and gluons are confined. Thus, non-perturbative techniques are required. We employ the variational method, a rigorous, non-perturbative approach which provides...
We have generated an updated version of the pฮฉ potential for low-energy interactions based on an effective field theory approach at leading order. This potential, together with other potentials based either on different parametrizations or lattice QCD, have been used to solve the Schrรถdinger equation numerically, obtaining the scattering wave functions for different values of the relative...
A Monte-Carlo simulator has been designed to generate events of a proton-pion scattering employing a realistic model based on the unified Chew-Mandelstam SAID parametrization. Using the generated data, a partial wave analysis of the final state of the system is performed. The energy dependent partial-wave amplitudes are derived analytically using Barrelet zeros of the moments. This study also...
Similar to the crossover phase transition in lattice QCD, at high temperature and small baryon chemical potential, recently, the structure of neutron stars have been studied with a crossover equation of state to model a smooth transition from a pure neutron matter to massless quarks [1]. The switch function, that guides the crossover, was constrained in order to reproduce neutron stars up to...
In the framework of the Born-Oppenheimer effective field theory, the hyperfine structure of heavy quarkonium hybrids at leading order in the
1/mQ expansion is determined by two potentials. We estimate those potentials by interpolating between the known short-distance behavior and the long-distance behavior calculated in the QCD effective string theory. The long-distance behavior depends, at...
In quantum chromodynamics (QCD), perturbation theory cannot always be employed in order to compute observables, due to the energy-dependent nature of the strong coupling constant, particularly in the low-energy regime where quarks and gluons are confined. Thus, non-perturbative techniques are required. We employ the variational method, a rigorous, non-perturbative approach which provides...
We have generated an updated version of the pฮฉ potential for low-energy interactions based on an effective field theory approach at leading order. This potential, together with other potentials based either on different parametrizations or lattice QCD, have been used to solve the Schrรถdinger equation numerically, obtaining the scattering wave functions for different values of the relative...
A Monte-Carlo simulator has been designed to generate events of a proton-pion scattering employing a realistic model based on the unified Chew-Mandelstam SAID parametrization. Using the generated data, a partial wave analysis of the final state of the system is performed. The energy dependent partial-wave amplitudes are derived analytically using Barrelet zeros of the moments. This study also...
Similar to the crossover phase transition in lattice QCD, at high temperature and small baryon chemical potential, recently, the structure of neutron stars have been studied with a crossover equation of state to model a smooth transition from a pure neutron matter to massless quarks [1]. The switch function, that guides the crossover, was constrained in order to reproduce neutron stars up to...
In the framework of the Born-Oppenheimer effective field theory, the hyperfine structure of heavy quarkonium hybrids at leading order in the
1/mQ expansion is determined by two potentials. We estimate those potentials by interpolating between the known short-distance behavior and the long-distance behavior calculated in the QCD effective string theory. The long-distance behavior depends, at...
We start from the assumption that the ฮc(2940) and ฮc(2910) correspond mostly to DโN bound states with JP = 1/2โ and 3/2โ, respectively. Then, adding a D meson as a third particle, and as- suming that the DN and DDโ interactions are mainly dominated by the ฮc(2765) and Tcc(3875) resonances, we look for the possible binding of the DโDN three body system within the framework of the Fixed Center...
We study the three-body baryonic B decay Bยฏ0s โ pฮKยฏ within the framework of the pole model via the baryonic ฮ_b pole. In our calculation, we require the strong coupling constant gฮ_b B_s ฮ and investigate if gฮ_bB_sฮ = 10.49ยฑ1.57 is adopted, the branching ratio agrees with the experimental result, reported by the LHCb collaboration.
We have calculated the femtoscopic correlation functions of meson-baryon pairs in the strangeness $S=-1$ sector, employing a unitarized chiral interaction model up to next-to-leading order. We will show results for the $\pi^- \Lambda$ correlation function, which is presently under analysis by the ALICE@LHC collaboration. We will also demostrate that the employed interaction is perfectly...
Chiral trajectories of dynamically generated resonances are connected to the SU(3) breaking pattern and their nature. From an analysis of a recent LQCD simulation on the $\pi\Sigma-\bar{K}N$ scattering for $I=0$, and the study of the quark mass dependence of the octet baryons, we determine for the first time the trajectory of the two poles associated to the $\Lambda(1405)$ towards the...
Relativistic Heavy Ion Collisions allow to create ultra hot and dense systems, where a phase transition from hadronic matter to quark-gluon matter is expected to occur. Nowadays the progress of experimental techniques allows to analyze these collisions on an event-by-event basis, and the most advanced theoretical simulations are performed within the so-called hybrid models, where different...
We start from the assumption that the ฮc(2940) and ฮc(2910) correspond mostly to DโN bound states with JP = 1/2โ and 3/2โ, respectively. Then, adding a D meson as a third particle, and as- suming that the DN and DDโ interactions are mainly dominated by the ฮc(2765) and Tcc(3875) resonances, we look for the possible binding of the DโDN three body system within the framework of the Fixed Center...
We study the three-body baryonic B decay Bยฏ0s โ pฮKยฏ within the framework of the pole model via the baryonic ฮ_b pole. In our calculation, we require the strong coupling constant gฮ_b B_s ฮ and investigate if gฮ_bB_sฮ = 10.49ยฑ1.57 is adopted, the branching ratio agrees with the experimental result, reported by the LHCb collaboration.
We have calculated the femtoscopic correlation functions of meson-baryon pairs in the strangeness $S=-1$ sector, employing a unitarized chiral interaction model up to next-to-leading order. We will show results for the $\pi^- \Lambda$ correlation function, which is presently under analysis by the ALICE@LHC collaboration. We will also demostrate that the employed interaction is perfectly...
Chiral trajectories of dynamically generated resonances are connected to the SU(3) breaking pattern and their nature. From an analysis of a recent LQCD simulation on the $\pi\Sigma-\bar{K}N$ scattering for $I=0$, and the study of the quark mass dependence of the octet baryons, we determine for the first time the trajectory of the two poles associated to the $\Lambda(1405)$ towards the...
Relativistic Heavy Ion Collisions allow to create ultra hot and dense systems, where a phase transition from hadronic matter to quark-gluon matter is expected to occur. Nowadays the progress of experimental techniques allows to analyze these collisions on an event-by-event basis, and the most advanced theoretical simulations are performed within the so-called hybrid models, where different...
Several femtoscopy correlation functions have been calculated in the strangeness sectors $S=0$ and $S=-2$ for meson-baryon interactions. We combine the interactions of chiral perturbation theory at leading order with the TROY (T-matrix-based Routine for HadrOn femtoscopY) framework. We predict the correlation function for the $\pi^{+}$p and $\pi^-$p channels, which are currently under analysis...
In the coalescence of binary neutron stars nonequilibrium processes unfold. The dynamics of these processes is influenced by the materialโs transport coefficients. A comprehensive understanding of the transport coefficients of ultradense matter becomes imperative, as these are determined by the microscopic composition and the dominant interactions of its constituents. To this end we compute...
One of the major themes in QCD is to elucidate the QCD phase diagram with temperature and density. The possibility of inhomogeneous chiral condensation in low-temperature and high-density regions has been discussed using effective models such as the Nambu-Jona-Lasinio model. It has also been pointed out that the dispersion relation of Nambu-Goldstone bosons may change in this phase. Therefore,...
Traditionally, the study of strong interactions at the hadronic level has successfully relied on scattering experiments. Recently, however, new femtoscopic correlation measurements for hadronic pairs have provided further insights into the strong interaction between particles, especially at lower momenta. In this work, we use both types of datasets in parallel to perform theoretical...
The Time Dependent Hartree-Fock (TDHF) approach is a microscopic self-consistent mean-field model to describe dynamical processes of many-body systems. We modify the open-source Sky3D code, which implements TDHF with a Skyrme functional, and repurpose it to employ the Barcelona-Catania-Paris-Madrid (BCPM) energy density functional. We present preliminary results for both static and dynamical...
Several femtoscopy correlation functions have been calculated in the strangeness sectors $S=0$ and $S=-2$ for meson-baryon interactions. We combine the interactions of chiral perturbation theory at leading order with the TROY (T-matrix-based Routine for HadrOn femtoscopY) framework. We predict the correlation function for the $\pi^{+}$p and $\pi^-$p channels, which are currently under analysis...
In the coalescence of binary neutron stars nonequilibrium processes unfold. The dynamics of these processes is influenced by the materialโs transport coefficients. A comprehensive understanding of the transport coefficients of ultradense matter becomes imperative, as these are determined by the microscopic composition and the dominant interactions of its constituents. To this end we compute...
One of the major themes in QCD is to elucidate the QCD phase diagram with temperature and density. The possibility of inhomogeneous chiral condensation in low-temperature and high-density regions has been discussed using effective models such as the Nambu-Jona-Lasinio model. It has also been pointed out that the dispersion relation of Nambu-Goldstone bosons may change in this phase. Therefore,...
Traditionally, the study of strong interactions at the hadronic level has successfully relied on scattering experiments. Recently, however, new femtoscopic correlation measurements for hadronic pairs have provided further insights into the strong interaction between particles, especially at lower momenta. In this work, we use both types of datasets in parallel to perform theoretical...
The Time Dependent Hartree-Fock (TDHF) approach is a microscopic self-consistent mean-field model to describe dynamical processes of many-body systems. We modify the open-source Sky3D code, which implements TDHF with a Skyrme functional, and repurpose it to employ the Barcelona-Catania-Paris-Madrid (BCPM) energy density functional. We present preliminary results for both static and dynamical...
