CERN entdeckt neues Teilchen Xicc+: Viermal schwerer als Proton Neues Teilchen am CERN entdeckt: „Xicc+“ ist viermal schwerer als ein Proton. Warum diese Entdeckung für die Physik entscheidend ist – jetzt lesen.

Guten Tag, es ist Donnerstag,
und wir haben ein neues #Elementarteilchen mit äh Charm(e)! :D

www.vienna.at/cern-entdeck...

#Atomphysik #Physik #physics #CERN #Baryon #Quanten

Original post on astrobites.org

Unveiling the interstellar medium of coming-of-age galaxies …to learn more about the origins of dusty galaxies at early cosmic times. Title: The ALPINE-ALMA [CII] Survey: Unveiling the baryon evo...

#Daily #Paper #Summaries #ALMA #cosmic #baryon #cycle #dust […]

[Original post on astrobites.org]

Original post on sci.news

Our Universe Has Already Entered Decelerating Phase, Study Suggests New research from Yonsei University in Seoul, Korea, casts doubt on the long-standing theory that dark energy is driving distant ...

#Astronomy #Featured #Physics #Baryon #Acoustic #Oscillation […]

[Original post on sci.news]

Original post on sci.news

Our Universe Has Already Entered Decelerating Phase, Study Suggests New research from Yonsei University in Seoul, Korea, casts doubt on the long-standing theory that dark energy is driving distant ...

#Astronomy #Featured #Physics #Baryon #Acoustic #Oscillation […]

[Original post on sci.news]

Baryon de la chatte

Un baryon est une particule subatomique constituée de trois quarks. Les baryons, comme les protons et les neutrons, sont des composants fondamentaux du noyau atomique. #Baryon #Particule #Quarks #Atomique #Noyau

LHCb collaboration observes ultra-rare baryon decay Baryons, composite particles made up of three quarks bound together via the so-called strong force, make up the most visible matter and have thus been the focus of numerous physics studies. Studying t...

#LHCb collaboration observes ultra-rare #baryon decay
#Science

#cp-violation #baryon #meson #neutrino #particle-physics #standard-model #violations-cp #elementary-particle #matter-antimatter-asymmetry #cosmology #high-energy-physics #accelerator-experiment #neutral-meson-system

Cosmic Mystery Solved? Earth May Reside Within a Huge ‘Void’ in Space Scientists have proposed Earth is in the middle of a huge void in space, potentially resolving the cosmic mystery known as ...

#Astronomy #Breaking #News #Space #baryon #acoustic […]

[Original post on thedebrief.org]

Antimaterie: Symmetriebruch nachgewiesen Meilenstein: Physiker haben erstmals einen Unterschied zwischen Antimaterie und Materie bei einem Baryon nachgewiesen – einem der Bausteine aller Materie. Der signifikante Symmetriebruch zeigte sich bei Zerfällen im Teilchenbeschleuniger LHC am Forschungszentrum CERN. Dabei verhielt sich ein „schwererer Bruder“ des Protons, das sogenannte Beauty-Lambda-Baryon, anders als sein Antimaterie-Gegenpart. Dieser wichtige Durchbruch könnte helfen, das kosmische Antimaterie-Rätsel zu lösen. scinexx

Antimaterie: Symmetriebruch nachgewiesen https://wp.me/p36Ae-1b9N Physiker haben erstmals einen Unterschied zwischen Antimaterie und Materie bei einem Baryon nachgewiesen – einem der Bausteine aller Materie. #Symmetriebruch #Materie #Antimaterie #LHC #Baryon

Antimaterie: Symmetriebruch nachgewiesen Meilenstein: Physiker haben erstmals einen Unterschied zwischen Antimaterie und Materie bei einem Baryon nachgewiesen – einem der Bausteine aller Materie.

Antimaterie: Symmetriebruch nachgewiesen

Physiker belegen erstmals Verhaltensunterschiede bei einem Materiebaustein und seinem Antiteilchen

scinexx.de/news/physik/...

#Wissen #Physik #Teilchenphysik #Antimaterie #Antiteilchen #Zerfall #Baryon #LHC

**The Lambda-CDM (ΛCDM) model has been the foundation of modern cosmology for some time now, successfully describing large-scale structures in the Universe. It proposes that 95% of the cosmos is composed of dark matter (25%) and dark energy (70%). Dark energy, represented by the cosmological constant (Λ), is thought to drive the accelerating expansion of the Universe, maintaining a constant energy density over time. However, new results from the Dark Energy Survey hint at a deviation from this assumption, suggesting that dark energy might evolve over time.** This artist’s impression shows the evolution of the Universe beginning with the Big Bang on the left followed by the appearance of the Cosmic Microwave Background. The formation of the first stars ends the cosmic dark ages, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics. The Dark Energy Survey (DES) was conducted using the 570-megapixel Department of Energy-fabricated Dark Energy Camera (DECam), mounted on NSF’s Víctor M. Blanco 4-m telescope at Cerro Tololo Inter-American Observatory, a Program of NSF NOIRLab. By taking data on 758 nights across six years, the DES scientists mapped an area almost one-eighth of the entire sky. The project employs multiple observational techniques, including supernova measurements, galaxy clustering analysis, and weak gravitational lensing, to study dark energy. Two key DES measurements — Baryon Acoustic Oscillations (BAO) and distance measurements of exploding stars (Type Ia supernovae) — track the Universe’s expansion history. BAO refers to a standard cosmic ruler formed by sound waves in the early Universe, with peaks spanning approximately 500 million light-years. Astronomers can measure these peaks across several periods of cosmic history to see how dark energy has stretched the scale over time. “By analyzing 16 million galaxies, DES found that the measured BAO scale is actually 4% smaller than predicted by ΛCDM,” said Dr. Santiago Avila, an astronomer at the Centre for Energy, Environmental and Technological Research (CIEMAT). Type Ia supernovae serve as standard candles, meaning they have a known intrinsic brightness. Therefore, their apparent brightness, combined with information about their host galaxies, allows scientists to make precise distance calculations. In 2024, the DES team published the most extensive and detailed supernova dataset to date, providing highly accurate measurements of cosmic distances. The new findings from the combined supernovae and BAO data independently confirm the anomalies seen in the 2024 supernova data. By integrating the DES measurements with the Cosmic Microwave Background data, the researchers inferred the properties of dark energy — and the results suggest a time-evolving nature. If validated, this would imply that dark energy, the cosmological constant, is not constant after all, but a dynamic phenomenon requiring a new theoretical framework. “This result is intriguing because it hints at physics beyond the standard model of cosmology,” said Dr. Juan Mena-Fernández, a researcher at the Subatomic Physics and Cosmology Laboratory. “If further data support these findings, we may be on the brink of a scientific revolution.” Although the current results are not yet definitive, upcoming analyses incorporating additional DES probes — such as galaxy clustering and weak lensing — could strengthen the evidence. Similar trends have emerged from other major cosmological projects, including the Dark Energy Spectroscopic Instrument (DESI), raising anticipation within the scientific community. “These results represent years of collaborative effort to extract cosmological insights from DES data,” said Dr. Jessie Muir, a researcher at the University of Cincinnati. “There is still much to learn, and it will be exciting to see how our understanding evolves as new measurements become available.” The team’s paper will be published in the journal _Physical Review D_. _____ T.M.C. Abbott _et al_. (DES Collaboration). 2025. Dark Energy Survey: implications for cosmological expansion models from the final DES Baryon Acoustic Oscillation and Supernova data. _Physical Review D_ , in press; arXiv: 2503.06712

Dark Energy Survey Supports Theory of Evolving Dark Energy The Lambda-CDM (ΛCDM) model has been ...

www.sci.news/astronomy/dark-energy-su...

#Astronomy #Physics #Baryon #Acoustic #Oscillation #Dark #energy #Dark #Energy #Camera #Dark

Event Attributes

**The Lambda-CDM (ΛCDM) model has been the foundation of modern cosmology for some time now, successfully describing large-scale structures in the Universe. It proposes that 95% of the cosmos is composed of dark matter (25%) and dark energy (70%). Dark energy, represented by the cosmological constant (Λ), is thought to drive the accelerating expansion of the Universe, maintaining a constant energy density over time. However, new results from the Dark Energy Survey hint at a deviation from this assumption, suggesting that dark energy might evolve over time.** This artist’s impression shows the evolution of the Universe beginning with the Big Bang on the left followed by the appearance of the Cosmic Microwave Background. The formation of the first stars ends the cosmic dark ages, followed by the formation of galaxies. Image credit: M. Weiss / Harvard-Smithsonian Center for Astrophysics. The Dark Energy Survey (DES) was conducted using the 570-megapixel Department of Energy-fabricated Dark Energy Camera (DECam), mounted on NSF’s Víctor M. Blanco 4-m telescope at Cerro Tololo Inter-American Observatory, a Program of NSF NOIRLab. By taking data on 758 nights across six years, the DES scientists mapped an area almost one-eighth of the entire sky. The project employs multiple observational techniques, including supernova measurements, galaxy clustering analysis, and weak gravitational lensing, to study dark energy. Two key DES measurements — Baryon Acoustic Oscillations (BAO) and distance measurements of exploding stars (Type Ia supernovae) — track the Universe’s expansion history. BAO refers to a standard cosmic ruler formed by sound waves in the early Universe, with peaks spanning approximately 500 million light-years. Astronomers can measure these peaks across several periods of cosmic history to see how dark energy has stretched the scale over time. “By analyzing 16 million galaxies, DES found that the measured BAO scale is actually 4% smaller than predicted by ΛCDM,” said Dr. Santiago Avila, an astronomer at the Centre for Energy, Environmental and Technological Research (CIEMAT). Type Ia supernovae serve as standard candles, meaning they have a known intrinsic brightness. Therefore, their apparent brightness, combined with information about their host galaxies, allows scientists to make precise distance calculations. In 2024, the DES team published the most extensive and detailed supernova dataset to date, providing highly accurate measurements of cosmic distances. The new findings from the combined supernovae and BAO data independently confirm the anomalies seen in the 2024 supernova data. By integrating the DES measurements with the Cosmic Microwave Background data, the researchers inferred the properties of dark energy — and the results suggest a time-evolving nature. If validated, this would imply that dark energy, the cosmological constant, is not constant after all, but a dynamic phenomenon requiring a new theoretical framework. “This result is intriguing because it hints at physics beyond the standard model of cosmology,” said Dr. Juan Mena-Fernández, a researcher at the Subatomic Physics and Cosmology Laboratory. “If further data support these findings, we may be on the brink of a scientific revolution.” Although the current results are not yet definitive, upcoming analyses incorporating additional DES probes — such as galaxy clustering and weak lensing — could strengthen the evidence. Similar trends have emerged from other major cosmological projects, including the Dark Energy Spectroscopic Instrument (DESI), raising anticipation within the scientific community. “These results represent years of collaborative effort to extract cosmological insights from DES data,” said Dr. Jessie Muir, a researcher at the University of Cincinnati. “There is still much to learn, and it will be exciting to see how our understanding evolves as new measurements become available.” The team’s paper will be published in the journal _Physical Review D_. _____ T.M.C. Abbott _et al_. (DES Collaboration). 2025. Dark Energy Survey: implications for cosmological expansion models from the final DES Baryon Acoustic Oscillation and Supernova data. _Physical Review D_ , in press; arXiv: 2503.06712

Dark Energy Survey Supports Theory of Evolving Dark Energy The Lambda-CDM (ΛCDM) model has been ...

www.sci.news/astronomy/dark-energy-su...

#Astronomy #Physics #Baryon #Acoustic #Oscillation #Dark #energy #Dark #Energy #Camera #Dark

Event Attributes

Published one year ago on this day, the discovery of Ho'oleilana

doi.org/10.3847/1538...

#hooleilana #cosmology #galaxies #bao #baryon #acoustic #oscillations #astronomy #astrophysics #universe #space #science #STEM #physics #theory #bigbang #bigbangtheory #ΛCDM #laniakea #laniakeasupercluster

How crazy is that? 50000 downloads for the Ho'oleilana paper, and still among the most read articles at ApJ!

doi.org/10.3847/1538...

#hooleilana #cosmology #bao #baryon #acoustic #oscillations #astronomy #astrophysics #universe #science #discovery #cosmography #physics #theory #bigbang #lcdm