Conveners
Nuclear and particle astrophysics
- Daniel Galaviz (LIP)
- Jaime Alvarez-Muniz (IGFAE)
- Achim Schwenk (TU Darmstadt)
- Rúben Conceição (LIP)
Nuclear and particle astrophysics
- Jaime Alvarez-Muniz (IGFAE)
- Daniel Galaviz (LIP)
- Achim Schwenk (TU Darmstadt)
- Rúben Conceição (LIP)
Description
Information for speakers about talk's duration:
15 min slots: 12 to speak + 3 for questions
20 min slots: 15 to speak + 5 for questions
Understanding the structure of strongly-interacting quantum mechanical systems such as atomic nuclei is a formidable challenge in physics. We recently demonstrated the feasibility to access nucleon-nucleon Short-Range Correlations (SRCs) in nuclei using hadronic probes in inverse kinematics [1]. The experiment was carried out at the JINR (Russia), a $^{12}$C beam at 48 GeV/c impinged on a...
The present new and very exciting multi-messenger era for the astronomy, nuclear, gravitational and astrophysics community was set by the detection of gravitational wave signals from the collision of two neutron stars (NS) by the LIGO and Virgo interferometers in 2017, followed up by the detection of the gamma-ray burst GRB170817A and the electromagnetic transient AT2017gfo. Later, in 2019, a...
The ab initio description of nuclear systems has undergone a major renewal due to the use of low-resolution interactions derived from chiral effective field theory in conjunction with many-body techniques admitting for mild computational scaling [1].
Nowadays many-body practitioners are able to target systems with up to one hundred interacting particles from first principles in a...
Atomic and molecular ions contained in RF traps are demonstrating to provide some of the most precise measurements possible of electron-nucleon interactions.
Atoms and molecules containing radioactive nuclei are predicted to offer significant enhancements to constrain beyond the Standard Model effects, including searches for time-reversal symmetry, dark matter candidates and yet to be...
Lightest elements were produced in the first few minutes of the Universe through a sequence of nuclear reactions known as Big Bang nucleosynthesis (BBN).
Although astronomical observations of primordial deuterium abundance have reached percent accuracy, theoretical predictions based on BBN are affected by the large uncertainty on the cross-section of the D(p,γ)3He deuterium...
In the last two decades atmospheric, solar, reactor and accelerator experiments have precisely measured neutrino squared mass differences and mixings, responsible for neutrino vacuum oscillations. An intense experimental program will keep addressing unknown neutrino properties including neutrino mass ordering and mass scale, the neutrino nature, the existence of sterile neutrinos, of CP...
The astrophysical sites where r-process elements are synthesized remain mysterious: it is clear that neutron-star mergers (kilonovae, KNe) contribute, and some classes of core-collapse supernovae (SNe) are also likely sources of at least the lighter r-process species. The discovery of the live isotope Fe60 on the Earth and Moon over the past decades implies that one or more astrophysical...
The observation of the near-infrared emission from binary neutron-star
merger events, often know as kilonova, has increased the confidence
that these astrophysical sources are the potential sites of heavy
r-process nucleosynthesis. This emission is present in the
observations of the gravitational-wave signal (GW170817) by LIGO/Virgo
and is consistent with an electromagnetic transient...
A measurement of the transmission coefficient for neutrons through a thick ($\sim 3$\,atoms/b) liquid natural argon target in the energy range $30$-$70$\,keV was performed by the Argon Resonance Transmission Interaction Experiment (ARTIE) using a time of flight neutron beam at Los Alamos National Laboratory.
In this energy range theory predicts an anti-resonance in the $^{40}$Ar cross section...
The FRIB S800 superconducting spectrograph is used for studying nuclear reactions induced by high-energy radioactive beams. The spectrometer was designed for high-precision measurements of small scattering angles (within ±2 msr), combined with the large acceptance of the solid angle (20 msr) and momentum (6%). The high-resolution (1/10,000) is optimized for energies up to 200 MeV/u. The S800...
The reaction network in the neutron-deficient part of the nuclear chart around A$\sim$100 contains several nuclei of importance to astrophysical processes, such as the p-process. This work reports on the results from recent experimental studies of the radiative proton-capture reactions $^{112,114}$Cd(p,γ)$^{113,115}$In. Isotopically enriched $^{112}$Cd and $^{114}$Cd targets have been used...
Proton capture reactions at sub-barrier energies have significant
contributions in explosive nucleosynthesis environments. In
particular, they are crucial to determine the reaction rate of the
inverse (g,p) reaction in reaction networks describing the production
of the stable p-nuclei, a set of 35 naturally occurring nuclei from Se
to Hg that cannot be produced in neutron capture...
Neutron induced reactions play a significant role in the
nucleosynthesis of the elements in the cosmos. Its interest ranges
from the primordial processes occurred during the Big Bang
Nucleosynthesis up to the "stellar cauldrons" where neutron
capture reactions could take place via the s-process or the r-process.
In the last years, several efforts have been made to investigate...
The Laboratory for Underground Nuclear Astrophysics (LUNA) is an experiment located in deep underground at Gran Sasso National Laboratories (LNGS). Its mission is to study charged-particle induced nuclear reactions of astrophysical interest.
This is an unique experiment that combines low environmental background and an intense and long term stable proton or alpha beam. The combination of...
Resonance phenomena appearing in low-energy nuclear reactions are very important in studies of nucleosynthesis in cosmos because reaction rates in the synthesis are strongly affected by the resonance parameters: resonance energy and decay width. In particular, the inelastic scattering to the continuum energy states above the particle decay threshold, which is often called breakup reaction, is...
The partial half-life of $^{190}Pt$ for the alpha decay to the first excited level ($E_{exc}=137.2$ keV) of $^{186}Os$ was measured using an ultralow-background HPGe-detector system located 225 m underground in the laboratory HADES (Belgium). A sample of high purity platinum (the purity grade is 99.95%) with a mass of 148.122 g was used and measured during 373 days. Preliminary, the partial...
The Southern Wide-field Gamma-ray Observatory (SWGO) main scope is the observation of the Galactic centre region and other sky regions not accessible from the Northern hemisphere. The Observatory is being designed to detect atmospheric air showers over a wide energy range, from few hundred MeVs up to PeVs. Therefore, it will detect not only air showers initiated by gamma rays, but also...
IceCube, a kilometer-cubed scale detector operating at the South Pole, has discovered an all-sky isotropic high-energy neutrino flux. A likely astrophyscal neutrino observed in September 2017, was coincident with high-energy and very-high-energy flares from the blazar TXS 0506+056, so revealing the first candidate high-energy neutrino source. A follow-up study by IceCube with archival data...
The first deep-sea neutrino telescope, ANTARES, located in the Mediterranean, close to the coast of Toulon (France), has been continuously taking data since 2007. Its primary aim is to detect astrophysical neutrinos in the TeV–PeV in order to contribute to the effort of identifying astrophysical sources of Cosmic Rays and better understand their nature. The next-generation Neutrino Telescope,...
Over the last 15 years, the Antarctic Impulse Transient Antenna (ANITA)
collaboration has flown interferometric radio arrays on long-duration balloon
payloads over Antarctica. ANITA seeks to detect the Askaryan radio emission
produced from interactions of ultrahigh-energy (>1 EeV) neutrinos in the
Antarctic Ice Sheet. Above 10^{19.5} eV, ANITA sets world-leading limits on
neutrino flux. ...
Cosmic Rays are high-energetic particles of cosmic origin constantly bombarding Earth. Their energies extend beyond $10^{20}$ eV, 400 TeV in the center of mass system for proton-proton collisions. Such energies are well above those achieved by LHC and therefore hadronic models in this range rely on extrapolations from energies several orders of magnitude lower. Cosmic rays offer therefore the...
The Dark Matter Particle Explorer (DAMPE), is a space–borne detector designed for precise galactic Cosmic Ray (CR) studies in a wide energy range (up to 100 TeV), along with detailed measurements of high–energy gamma–rays and indirect searches of Dark Matter (DM) annihilation/decay to detectable particles. The satellite was successfully launched into a sun–synchronous orbit at 500 km, on...
LUX-ZEPLIN (LZ) is a direct dark matter experiment with a projected sensitivity to WIMP-nucleon interactions that is more than an order of magnitude better than the current best limits. The design of LZ features a dual-phase time projection chamber (TPC) containing 7 active tonnes of liquid xenon and 5.6 tonnes fiducial, and it has additional instrumented detectors encompassing the TPC for...
Pulsar magnetospheres admit non-stationary vacuum gaps that are characterized by non-vanishing $\bf E \cdot B$. The vacuum gaps play an important role in plasma production and electromagnetic wave emission. We show that these gaps generate axions whose energy is set by the gap oscillation frequency. The density of axions produced in a gap can be several orders of magnitude greater than the...
I will present a recent application of the SN 1987A cooling bound to set a constraint on dark flavoured sectors. This is possible thanks to the fact that the protoneutron stars are hot and dense environments where hyperons can be efficiently produced. Therefore a decay of the form $Λ→nX^0$, where $X^0$ is a new bosonic dark particle, will be severely constrained. I will explain the ingredients...
We study an impact of asymmetric dark matter on properties of neutron stars and their ability to reach the two solar masses limit, which allows us to present a new range of masses of dark matter particles and their fractions inside the star. Our analysis is based on the observational fact of the existence of two pulsars reaching this limit and on the theoretically predicted reduction of the...
The Scintillating Bubble Chamber (SBC) experiment is a novel detection technique aimed at detecting low-mass (0.7-7 GeV/c2) WIMP interactions and coherent elastic neutrino-nucleus scattering (CEνNS) from reactor neutrinos. Using a target volume primarily composed of superheated argon, the nucleation signal from electron recoils (the limiting factor for low-threshold studies in bubble chambers)...
In this work we investigate neutron stars (NS) in f (R, T ) gravity for the case R + 2λT , R is the Ricci scalar and T the trace of the energy-momentum tensor. The hydrostatic equilibrium equations are
solved considering realistic equations of state (EOS). The NS masses and radii obtained are subject to a joint constrain from massive pulsars and the event GW170817. The pressure gradient...
We study cooling neutron-stars with strong magnetic fields through neutrino emissions from neutrino and antineutrino pair emission [1] and the Direct urca (DU) processes. We perform exact relativistic quantum calculations by introducing the Landau levels and anomalous magnetic moments [2]. Strong magnetic fields supply energy and momentum and make these processed even in the conditions where...
