Conveners
Astroparticle Physics and Cosmology
- Rita Anjos
Astroparticle Physics and Cosmology
- Alberto Daniel Supanitsky
Astroparticle Physics and Cosmology
- Miguel Mostafa
Astroparticle Physics and Cosmology
- Claudio Dib (Federico Santa Maria Technical University (CL))
Astroparticle Physics and Cosmology
- Ruben Conceiรงรฃo (Laboratory of Instrumentation and Experimental Particle Physics (PT))
Astroparticle Physics and Cosmology
- Carlos Josรฉ Todero Peixoto (Universidade de Sรฃo Paulo)
Astroparticle Physics and Cosmology
- Carlos Josรฉ Todero Peixoto (Universidade de Sรฃo Paulo)
Astroparticle Physics and Cosmology
- Joao de Mello Neto
Astroparticle Physics and Cosmology
- Analisa Gabriela Mariazzi
Astroparticle Physics and Cosmology
- Ioana Codrina Maris (Univ. P. et Marie Curie (Paris VI) (FR))
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Dr Clara Rojas (Yachay TECH University)7/30/26, 8:45โฏAM1Astro-particle Physics and CosmologyTalk
In this work, we study numerically the alpha-Starobinsky Inflationary Model in order to calculate the scalar and tensor power spectra. We perform our calculations for different parameters of the potential and show the contour plots.
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Mr Riccardo Sturani (IFT-UNESP/ICTP-SAIFR)7/30/26, 9:00โฏAMAstro-particle Physics and CosmologyTalk
The gravitational two-body problem attracted revived interest since the direct detection of gravitational waves from coalescing binaries almost ten years ago.
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I'll give an overview of the current development of the perturbative expansion of the two body dynamics, focusing on the contribution of radiatve modes to 6th post-Newtonian order. -
Prof. Rogerio Rosenfeld (IFT- UNESP/ICTP-SAIFR)7/30/26, 9:15โฏAMAstro-particle Physics and CosmologyTalk
Recent data seems to indicate that dark energy may not be consistent with a simple cosmological constant. Instead, the combined datasets
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show evidence for a dynamical dark energy, with a varying equation of state that crosses the so-called โphantom divideโ (w < โ1) at low redshifts.
This behavior can not be reproduced with simple quintessence models without evoking exotic kinetic terms or... -
Martin Arteaga Tupia7/30/26, 9:30โฏAMAstro-particle Physics and CosmologyTalk
We investigate particle production during cosmological first-order phase transitions in the runaway regime, where ultra-relativistic bubble walls store a significant fraction of the released vacuum energy. Upon collision, energy concentrated in the walls can be converted into highly energetic quanta on microscopic length scales set by the Lorentz-contracted wall thickness, realizing a...
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Reinaldo Francener (Universidade Estadual de Campinas)7/30/26, 9:45โฏAMAstro-particle Physics and CosmologyTalk
Extensions of the Standard Model based on an additional $U(1)_{L\mu - L_\tau}$ gauge symmetry predict the existence of a new massive and neutral gauge boson, $Z'$, coupled to leptons of the second and third generations. Such a boson can modify the power-law behavior of the astrophysical neutrino flux through interactions with the cosmic neutrino background. In Ref. [1], we investigate the...
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Bair Shaibonov7/30/26, 10:45โฏAMAstro-particle Physics and CosmologyTalk
The Baikal-GVD deep-underwater neutrino telescope is approaching a
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sensitive volume of 1 kmยณ. We present its current status and primary
astrophysical results based on data collected during its construction
phase. The key achievement is the diffuse astrophysical neutrino flux
measurement. We also report indications of neutrino emission from the
Milky Way and present the results of searches... -
Simon Sotirov (INR RAS)7/30/26, 11:00โฏAMAstro-particle Physics and CosmologyTalk
In this work, we attempt to explain the TeV - sub PeV neutrinos observed
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by IceCube assuming that their sources are active galactic nuclei (AGN). The results are obtained in the model where the thermal accretion disc emits in the UV-optical range inside the hot electron plasma cloud. We focus on the analytical solution for the comptonization problem obtained from consideration at the... -
Roman Pasechnik (Lund university)7/30/26, 11:15โฏAMAstro-particle Physics and CosmologyTalk
Classically scale-invariant (conformal) extensions of the Standard Model with a broken $U(1)^\prime$ can provide a mechanism for neutrino mass generation and feature potentially measurable signatures in cosmology. I summarize our results for supercooled first-order phase transitions in conformal neutrino-mass models and their multi-messenger implications. The transition can produce a...
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Mr Rajendra Neupane (Central Department of Physics, Tribhuvan University, Kathmandu, Nepal)7/30/26, 11:30โฏAMAstro-particle Physics and CosmologyTalk
The sources of high-energy astrophysical neutrinos remain largely unknown. Multi-wavelength observational campaigns have identified a few plausible candidates, but their numbers are very few. We look for an excess of high-energy neutrino events originating from blazar sources, compared to the number we expect from background sources. We generate random samples of events following the right...
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Liankun Zou (Shandong Institute of Advanced Technology (CN))7/31/26, 8:30โฏAMAstro-particle Physics and CosmologyTalk
Beryllium nuclei in cosmic rays are expected to be secondaries produced by the fragmentation of primary cosmic rays during their propagation in the Galaxy, and their fluxes contain essential information on cosmic-ray propagation and sources. Owing to the radioactive decay of $^{10}Be$ to $^{10}B$ with a half-life comparable to the cosmic-ray residence time in the Galaxy, the $^{10}Be/^{9}Be$...
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Zetong Sun (Chinese Academy of Sciences (CN))7/31/26, 8:45โฏAMAstro-particle Physics and CosmologyTalk
We present the continuous daily electron and positron spectra from 1 to 42 GeV. These unique data provide critical information to the understanding of the propagation of the same mass but opposite charge particles in heliosphere. The characteristics of the data can not be explained by current theoretical models.
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Hengyi Cai (Chinese Academy of Sciences (CN))7/31/26, 9:00โฏAMAstro-particle Physics and CosmologyTalk
Cosmic Nitrogen, Sodium, and Aluminum nuclei are a combination of primaries, produced at cosmic-ray sources, and secondaries resulting from collisions of heavier primary cosmic rays with the interstellar medium. We present high statistics measurements of the N, Na and Al rigidity spectra. We discuss the properties and composition of their spectra and present a model-independent determination...
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Prof. Qi Yan (Chinese Academy of Sciences (CN))7/31/26, 9:15โฏAM1Astro-particle Physics and CosmologyTalk
We report the unique properties of cosmic phosphorus (P), chlorine (Cl), argon (Ar), potassium (K), and calcium (Ca) fluxes in the GV to TV rigidity range collected by the Alpha Magnetic Spectrometer on the International Space Station from May 19, 2011 to November 26, 2024.
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Unexpectedly, we observed that the rigidity dependencies of the five fluxes are well described by the sums of a primary... -
Yao Chen (Shandong Institute of Advanced Technology (CN))7/31/26, 9:30โฏAMAstro-particle Physics and CosmologyTalk
We present the first measurement of cosmic-ray fluxes of $^6$Li and $^7$Li isotopes in the rigidity range from 1.9 to 25 GV. The measurements are based on 0.97 million $^6$Li and 1.04 million $^7$Li nuclei collected by the Alpha Magnetic Spectrometer (AMS) on the International Space Station from May 2011 to October 2023. We observe that over the entire rigidity range the $^6$Li and $^7$Li...
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Dr Hsin-Yi Chou (Academia Sinica (TW))7/31/26, 9:45โฏAMAstro-particle Physics and CosmologyTalk
Information of time variations of the anti-proton spectrum is very limited. We present the continuous 14.5 year measurements of cosmic ray anti-protons spectrum from 1 to 42 GV. The measured antiproton spectrum time variations are distinctly different from electrons, positrons, and protons. This provides unique information to the understanding of heliosphere physics.
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Jack Henry Bolster (Massachusetts Inst. of Technology (US))7/31/26, 10:00โฏAMAstro-particle Physics and CosmologyTalk
We present accurate measurements of primary cosmic rays Proton, Helium, Carbon, Oxygen, Neon, Magnesium, Silicon, Sulfur, Iron and Nickel as well as measurements of the secondary cosmic rays Lithium, Beryllium, Boron and Fluorine. The unexpected rigidity dependence of the secondary cosmic ray fluxes and their ratios to the primary cosmic rays such as Li/C, Be/C, B/C, Li/O, Be/O, B/O, F/Si are...
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Jorge Alfaro (Pontificia Universidad Catรณlica de Chile)7/31/26, 10:45โฏAMAstro-particle Physics and CosmologyTalk
Linearized gravity in the Very Special Relativity (VSR) framework is considered. We prove that this theory allows for a non-zero graviton mass $m_g$ without breaking gauge invariance nor modifying the relativistic dispersion relation. We find the analytic solution for the new equations of motion in our gauge choice, verifying as expected the existence of only two physical degrees of freedom....
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Prof. Gennady Kozlov (Joint Institute for Nuclear Research (RU))7/31/26, 11:00โฏAMAstro-particle Physics and CosmologyTalk
In the talk, we would claim to the preliminary analysis where the dark matter candidate is from the approximate scale symmetry theory of the hidden scalar sector. The dynamical system of the scalar particles in the hidden sector at finite temperature and chemical potential is considered. As the cosmological application, we propose the feebly interacting dark matter with the Standard Model...
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Matheus M. A. Paixรฃo (International Institute of Physics (IIP-UFRN))7/31/26, 11:15โฏAMAstro-particle Physics and CosmologyTalk
The tension between direct measurements of the Hubble constant and those stemming from Cosmic Microwave Background probes has triggered a multitude of studies. The connection between cosmology and particle physics has shown to be a valuable approach to addressing the Hubble tension. In particular, increasing the number of relativistic degrees of freedom in the early universe helps alleviate...
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Prof. Alexander Belyaev (University of Southampton & Rutherford Appleton Laboratory)7/31/26, 11:30โฏAMAstro-particle Physics and CosmologyTalk
Dark photons with masses below the electron-positron pair production threshold, $m_{A'} < 2m_e$, occupy a qualitatively distinct regime of hidden sector physics. In this mass range, visible decays into charged leptons are kinematically forbidden
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Two competing decay modes become relevant, which exhaust the allowed decay channels. The first is the loop-induced visible decay $A' \to 3\gamma$,... -
Luis Eduardo Funo de Moura Franca (Instituto de Fรญsica, Universidade de Sรฃo Paulo (USP))7/31/26, 11:45โฏAMAstro-particle Physics and CosmologyTalk
The muon veto system of the COSINE-100 and its upgraded successor, COSINE-100U, consists of 37 plastic scintillator (PS) panels that provide a 4$\pi$ coverage of the detector. COSINE-100 operated from September 2016 to March 2023 at the YangYang Underground Laboratory (Y2L) in South Korea, which is located at an effective depth of approximately 1800 meters water equivalent. An initial study of...
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Dr Andres Daniel Perez (Instituto Balseiro, Centro Atรณmico Bariloche)7/31/26, 12:00โฏPMAstro-particle Physics and CosmologyTalk
New exotic particles with MeV masses, such as axion-like particles or light dark matter, can be emitted from core-collapse supernovae (SNe) with semi-relativistic velocities and reach Earth as an extended packet due to their speed dispersion. It has been argued that the superposition of contributions from past galactic SNe gives rise to a smooth and stationary flux that could be observable in...
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Carlos Josรฉ Todero Peixoto (Universidade de Sรฃo Paulo)7/31/26, 2:30โฏPMAstro-particle Physics and CosmologyTalk
We present results on the mass composition of ultra-high-energy cosmic rays based on 17 years of data from the Pierre Auger Observatory. Measurements from the Fluorescence Detector of the average depth of shower maximum (Xmax) and the shower-to-shower fluctuations of Xmax provide evidence for a transition from a lighter to a heavier and less mixed composition above 10^18.4 eV. This transition...
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Sei Kato (Institut d'astrophysique de Paris)7/31/26, 2:45โฏPMAstro-particle Physics and CosmologyTalk
Andes Large-area PArticle detector for Cosmic-ray physics and Astronomy (ALPACA) is an air shower array experiment that will begin ultra-high-energy (UHE) gamma-ray observations in the southern sky in 2027. Its surface air shower array will cover an area of 83,000 m$^2$. Another detector component, an underground water Cherenkov-type muon detector array will cover an area of 3,600 m$^2$ to...
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Cristina Ripoli (University of Salerno)7/31/26, 3:00โฏPMAstro-particle Physics and CosmologyTalk
Various Forbush events, a sudden decrease in the flux of galactic cosmic rays typically associated with intense solar flares and coronal mass ejections, have been observed by the detectors of the Extreme Energy Event (EEE) project. The network is composed of several telescopes utilizing diverse technologies, namely MRPC chambers and scintillators, situated across Italian territory, CERN, and...
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Prof. A.C. Fauth (Universidade Estadual de Campinas, Brazil)7/31/26, 3:15โฏPMAstro-particle Physics and CosmologyTalk
We shall describe the evolution of the Latin American Giant Observatory (LAGO). Originating as a spin-off of the Pierre Auger Observatory, it has evolved from a geographically distributed network of Water Cherenkov Detectors (WCD) into a multidisciplinary research and innovation ecosystem. Originally conceived to study high-energy gamma-ray bursts at high-altitude, LAGO has expanded its...
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Beatriz de Errico (Universidade Federal do Rio de Janeiro)7/31/26, 3:30โฏPMAstro-particle Physics and CosmologyTalk
The Pierre Auger Observatory is the largest cosmic-ray detector in the world, with an instrumented area of 3000 km2, profiting from hybrid measurements from fluorescence telescopes, a ground array of water-Cherenkov stations, scintillator detectors, and radio antennas. The Radio Detector (RD), consisting of 1660 radio antennas, records the radio-frequency signals emitted from the...
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Lua Figueiredo Trava Airoldi (Institute of physics of the University of Sรฃo Paulo)7/31/26, 3:45โฏPM2Astro-particle Physics and CosmologyTalk
A black hole is expected to end its lifetime in a cataclysmic runaway burst of Hawking radiation, emitting all Standard Model particles with ultra-high energies.
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Thus, the explosion of a nearby primordial black hole (PBH) has been proposed as a possible explanation for the $\sim 220$~PeV neutrino-like event recently reported by the KM3NeT collaboration.
If the event originated from... -
Gobinda Majumder (Tata Institute of Fundamental Research (IN))7/31/26, 4:45โฏPM1Astro-particle Physics and CosmologyTalk
A prototype detector, called mini-ICAL made of 11 layers of iron
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plates (measuring $4\,m \times 4\,m \times 0.056\,m$ ) with 45\,mm gaps between each layer
was built and operated Madurai, India$\:$(9$^\circ$\,56'\,N, 78$^\circ$\,00'\,E)
to establish the detector performance and to test INO-ICAL electronics in the presence of a
magnetic field. Resistive plate
chambers ($2\,m\times... -
Ruben Conceiรงรฃo (Laboratory of Instrumentation and Experimental Particle Physics (PT))7/31/26, 5:00โฏPMAstro-particle Physics and CosmologyTalk
Ultra-high-energy cosmic rays have long been recognized as a unique opportunity to access hadronic interactions at centre-of-mass energies and forward kinematics far beyond those achievable at collider experiments. In this talk, we present a framework that establishes, for the first time, a direct and physically interpretable link between hadron production in the primary interaction and...
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Maria Inรชs Beja da Costa Soromenho de Alvito7/31/26, 5:15โฏPMAstro-particle Physics and CosmologyTalk
Discriminating gamma-rayโinduced air showers from the overwhelming hadronic background remains a main challenge in ground-based gamma-ray astronomy. While traditional separation methods rely on muon countingโrequiring complex, costly dedicated detector systemsโrecent studies demonstrate that ground-level observables provide competitive, cost-effective alternatives. Moreover, the variables...
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Analisa Gabriela Mariazzi7/31/26, 5:30โฏPMAstro-particle Physics and CosmologyTalk
While terrestrial accelerators provide essential particle physics data, the highest energies are accessible only through ultra-high-energy cosmic rays (UHECRs), whose atmospheric interactions produce extensive air showers that probe center-of-mass energies far beyond those of the LHC. The Pierre Auger Observatory acts as a massive natural laboratory, using a hybrid detection framework to...
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Ademar Paulo Junior (Instituto Federal de Educaรงรฃo, Ciรชncia e Tecnologia do Tocantins)7/31/26, 5:45โฏPMAstro-particle Physics and CosmologyTalk
The muon charge ratio, $R_{\mu} = N_{\mu^{+}}/N_{\mu^{-}}$, is an observable sensitive to both the composition of primary cosmic rays and the properties of hadronic interactions in extensive air showers (EAS). It also serves as a crucial input for atmospheric neutrino flux predictions. In this work, we present a systematic study of $R_{\mu}$ using Monte Carlo simulations of EAS initiated by...
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Prof. Rita de Cassia Dos Anjos7/31/26, 6:00โฏPMAstro-particle Physics and CosmologyTalk
Unlike blazars, radio galaxies host relativistic jets that are misaligned with respect to our line of sight, providing a complementary view of jet physics and the environment of the central supermassive black hole. Their TeV observations reveal ultraโfast variability and relatively hard ฮณโray spectra, and their broadband spectral energy distributions show the characteristic doubleโpeaked...
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Dr Nicolas Viaux Maira (Federico Santa Maria Technical University (CL))8/1/26, 8:45โฏAMAstro-particle Physics and CosmologyTalk
The CONDOR (Compact Network of Detectors with Orbital Range) observatory is a proposed high-altitude gamma-ray and cosmic-ray (CR) facility that addresses critical gaps in astroparticle physics by bridging the observational divide between satellite detectors like Fermi-LAT and higher-energy ground-based arrays such as HAWC and LHAASO. This poorly explored sub-TeV energy range is essential for...
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Prof. SARIRA SAHU (ICN, UNAM, Mexico City)8/1/26, 9:00โฏAMAstro-particle Physics and CosmologyTalk
Gamma-ray burst (GRB), GRB 221009A, a long-duration GRB, was observed simultaneously by the Water Cherenkov Detector Array (WCDA) and the Kilometer Squared Array (KM2A) of the Large High Altitude Air Shower Observatory (LHAASO) during the prompt emission and the afterglow periods. Multi-TeV photons up to 13 TeV were observed in the afterglow phase. The Gamma-ray spectra can be explained very...
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Miguel Molero Gonzalez (CIEMAT - Centro de Investigaciones Energรฉticas Medioambientales y Tec. (ES))8/1/26, 9:15โฏAMAstro-particle Physics and CosmologyTalk
Iron cosmic rays are the most abundant heavy nuclei at energies above 1 TeV and are believed to originate predominantly from astrophysical sources. Precise measurements of their energy spectrum provide key insights into the origin, acceleration, and propagation of cosmic rays. Recent observations by space-based detectors have revealed unexpected spectral features in the GeVโTeV range; however,...
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Ulisses Barres de Almeida (Brazilian Center for Physics Research (CBPF))8/1/26, 9:30โฏAMAstro-particle Physics and CosmologyTalk
The Southern Wide-field Gamma-ray Observatory (SWGO) will be the first km2-scale water Cherenkov detector array in the Southern Hemisphere. SWGO will be located in the Atacama Astronomical Park in Chile, at 4770 m above sea level, with a direct view of the Galactic Center and ample coverage of the Southern Sky. The array is designed to detect Very to Ultra-High-Energy gamma rays and will study...
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Joao de Mello Neto8/1/26, 9:45โฏAM1Astro-particle Physics and CosmologyTalk
Identifying the sources of ultra-high-energy particles is inherently a multimessenger problem, requiring cosmic rays, photons, neutrinos, and gravitational waves to establish robust source associations and physical interpretations. The Pierre Auger Observatory in Malargรผe, Argentina, combines a 3,000 km$^2$ surface array of 1,660 surface detector units with 27 fluorescence telescopes, enabling...
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Pavel Bezyazeekov (Joint Institute for Nuclear Research)8/1/26, 10:45โฏAMAstro-particle Physics and CosmologyTalk
TAIGA (Tunka Advanced Instrument for cosmic rays and Gamma Astronomy) is hybrid air-shower observatory located in Eastern Siberia. The primary task of the facility is the detection of air-showers produced by high-energy gamma rays. Within this task, it is crucial to distinguish gamma-induced events from the hadronic background, since the hadronic background exceeds the gamma-ray flux by...
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Ioana Maris8/1/26, 11:00โฏAMAstro-particle Physics and CosmologyTalk
The project Probing Extreme PeVatron Sources (PEPS) aims at measuring the most energetic ฮณ-rays from our Galaxy in the energy range between 10ยนโต eV and 5ร10ยนโถ eV, opening a new energy window for multimessenger astroparticle physics. PEPS will consist of an array of 10 kmยฒ placed in the southern hemisphere at the Pierre Auger Observatory. It will be built in two phases. Already the first phase,...
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Dmitriy Beznosko (Clayton State University)8/1/26, 11:15โฏAMAstro-particle Physics and CosmologyTalk
This presentation reports on the construction completion and calibration progress of DUCK (Detector system of Unusual Cosmic-ray casKades), a new cosmic-rays detector at the Clayton State University campus with ns-level detection resolution. The main scientific importance for the DUCK project will be to contribute to the approach of cosmic ray event analysis using the full waveform and...
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Luis Miguel Domingues Mendes8/1/26, 11:30โฏAMAstro-particle Physics and CosmologyTalk
Water Cherenkov detectors (WCDs) are fundamental components of large-area observatories dedicated to the study of gamma rays and cosmic rays, where thermal stability, optical properties, and tank industrial feasibility are critical for performance and scalability. In the context of the Southern Wide-field Gamma-ray Observatory (SWGO), new concepts of rotomolded high-density polyethylene (HDPE)...
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Bruno Basso Manzato (Universidade de Sรฃo Paulo)8/1/26, 11:45โฏAMAstro-particle Physics and CosmologyTalk
Muons are a present background radiation in most of the underground experiments, due to their small nuclear interaction cross-section and high kinetic energy. In rare-event experiments, like COSINE-100U, which searches for dark matter nuclear interactions, muon detectors play an important role as secondary veto detectors, where all muon-coincidence events with the NaI(Tl) crystals are...
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Daniil Davydov (Institute for Nuclear Research (INR) of the Russian Academy of Sciences)8/1/26, 12:00โฏPMAstro-particle Physics and CosmologyTalk
Axion-like particles (ALPs) are a class of hypothetical bosons beyond the standard model of particle physis, which are
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very weakly-interacting and long- lived. Since many ALPs may be produced in hot plasma in supernovae (SNe), a nearby
SNe Ia can be used as a probe of ALPs. It is desirable to predict the ALP emission from SNe Ia to discuss a possible
constraint that can be obtained from the... -
Dmitriy Beznosko (Clayton State University)8/1/26, 2:30โฏPMAstro-particle Physics and CosmologyTalk
It is well known that supermassive black holes in the centers of galaxies are capable of accelerating charged particles to very high energies. In many cases, the particle acceleration by black holes occurs electromagnetically through an electric field induced by the source. We explore the acceleration of charged particles in the combined gravitational and magnetic field around a rotating black...
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Diana Itzel Pรกez Sanchez (Instituto de Ciencias Nucleares)8/1/26, 2:45โฏPMAstro-particle Physics and CosmologyTalk
Extreme high-frequency peaked BL Lac objects (EHBLs) have synchrotron peaks above $10^{17}$ Hz and inverse Compton emission extending to several TeV. Owing to their low luminosity, only a few EHBLs are known and they remain poorly understood. Using the photohadronic model, we analyze 22 very high-energy (VHE) gamma-ray spectra from 15 EHBLs observed at different epochs. All spectra are well...
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Mr Arijit Das (Indian Institute of Science Education and Research, Thiruvananthapuram, India)8/1/26, 3:00โฏPMAstro-particle Physics and CosmologyTalk
We construct an equation of state describing cold and dense matter in the core of neutron stars which includes an admixture of fermionic dark matter and incorporates nucleon effective masses derived from the relativistic Brueckner-Hartree-Fock (BHF) many-body approach within a relativistic mean-field model. Such a BHF-informed mixed-model approach increases stellar compactness, with...
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Dr Andrey Sheshukov (Joint Institute for Nuclear Research, JINR)8/1/26, 3:15โฏPMAstro-particle Physics and CosmologyTalk
This talk presents the current status and scientific objectives of the SuperNova Early Warning System (SNEWS) 2.0, the next-generation global neutrino coincidence network.
A core-collapse supernova is a unique multimessenger event, emitting neutrino, gravitational wave, and electromagnetic signals. SNEWS 2.0 is designed for the real-time detection of the prompt neutrino burst, which arrives...
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Magdeline Mohlao8/1/26, 3:30โฏPMAstro-particle Physics and CosmologyTalk
Core-collapse supernovae are traditionally modelled using hydrodynamic drivers, yet growing studies suggest that magnetic fields critically shape shock wave dynamics. In this work, the impact of magnetic fields on the dynamics of core-driven shock waves during the bounce phase of massive star collapse is investigated. By modelling the actual stellar core, the physical mechanism of shock wave...
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Lisa Romaneehsen (Christian-Albrechts-Universitaet Kiel (DE))8/1/26, 4:45โฏPMAstro-particle Physics and CosmologyTalk
We present the precision measurement of daily proton and helium fluxes in cosmic rays from May 20, 2011 to November 1, 2025 in the rigidity interval from 1.71 to 100 GV collected with the Alpha Magnetic Spectrometer (AMS) aboard the International Space Station. The proton and helium fluxes, and the helium to proton flux ratio exhibit variations on multiple timescales. In nearly all the time...
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Alberto Aceituno Garcรญa (CIEMAT - Centro de Investigaciones Energรฉticas Medioambientales y Tec. (ES))8/1/26, 5:00โฏPMAstro-particle Physics and CosmologyTalk
Analysis of anisotropy of the arrival directions of galactic positrons, electrons and protons has been performed with the Alpha Magnetic Spectrometer on the International Space Station. This measurement allows to differentiate between point-like and diffuse sources of cosmic rays for the understanding of the origin of high energy positrons. The AMS results of the dipole anisotropy are...
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Mr Bangzheng Ma8/1/26, 5:15โฏPMAstro-particle Physics and CosmologyTalk
Mesons produced in cosmic-ray-induced hadronic cascades face two competing fates: they may either interact to initiate lower-energy hadronic showers or decay into muons. As atmospheric temperature rises, air density decreases, reducing the interaction probability of mesons and thereby enhancing their decay into muons. This results in a positive correlation between the underground muon flux and...
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Dr Senquan Lu (IHEP, CAS (CN))8/1/26, 5:30โฏPMAstro-particle Physics and CosmologyTalk
Precision measurements by AMS reveal unique properties of cosmic charged elementary particles. In the absolute rigidity range ~60 to ~500 GV, the antiproton flux and proton flux have nearly identical rigidity dependence. This behavior indicates an excess of high energy antiprotons compared with secondary antiprotons produced from the collision of cosmic rays. More importantly, from ~60 to ~500...
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