XXV International Baldin Seminar on High Energy Physics Problems "Relativistic Nuclear Physics and Quantum Chromodynamics"

Session

Parallel: Nuclear astrophysics

19 Sept 2023, 14:30

Conference Hall (BLTP JINR)

99. Resonance amplification of nuclear reaction X(a,b)Y near the a+X channel threshold

Melezhik, Vladimir (BLTP JINR Dubna)

19/09/2023, 14:30

Deviation of the cross section for the nuclear reaction X(a, b)Y from the Gamow formula due to an interaction additional to the Coulomb one in the entrance channel has been analyzed. It is shown that the reaction cross section has an oscillating structure at low energies. If the maximum of the first oscillation is close to the threshold of the channel a+X, it has a resonance behavior. To...

82. Reconstruction of the characteristics of a high-energy event detected by the Carpet-2 array in association with the GRB 221009A gamma-ray burst

Karpikov, Ivan (INR RAS)

19/09/2023, 15:00

The Carpet-2 collaboration reports on the observation and analysis of an event with a low muon content coincident with the gamma-ray burst GRB 221009A and the transient Swift J1913.1+1946. This bright transient was observed by numerous instruments in the optical, X-ray and gamma-ray energy ranges. The redshift of this GRB is z=0.1505 (measured from afterglow observations).
The Carpet-2 array...

88. Hyperonic interactions in neutron stars

Mr Mikheev, Semyon (Moscow State University)

19/09/2023, 15:20

Neutron stars have the density of the of the nuclear one, so the methods from the nuclear and particles physics can be used to describe them. However at high densities reached inside neutron stars an additional sensitivity to the certain properties of the baryonic interaction can appear.Therefore studying of neutron stars may be of great importance for understanding the properties of baryonic...

124. Temperature Dependence of Gluon Propagators within a Rainbow Truncation of Dyson-Schwinger Equations

Kaptari, Leonid (Joint Institute for Nuclear Research, BLTPh)

19/09/2023, 15:40

We investigate the finite-temperature structure of ghost and gluon propagators within an approach based on the rainbow truncated Dyson-Schwinger equations in the Landau gauge. The method early used for modeling quark, ghost and gluon propagators in vacuum is extended to finite temperatures. In Euclidean space, within the Matsubara imaginary-time formalism, it is necessary to distinguish...

157. Quantum tunneling in stars

Mr Fionov, Andrey (Russian Quantum Center)

Fusion in stars creates chemical elements.
Proton-proton cycle as one of the main of nuclear fusion reaction in the Sun converts hydrogen to helium.
Due to temperature and density of a star this reaction has different probabilities to occur.
The core of a Sun has a density of up to 150 g/cm3 and a temperature is close to 15.7 million Kelvin (K). By contrast, the Sun's surface temperature...