Results 31 to 40 of about 2,258,607 (385)
ATLAS and ultra high energy cosmic ray physics
EPJ Web of Conferences, 2017 After a brief introduction to extended air shower cosmic ray physics the current and future deployment of forward detectors at ATLAS is discussed along with the various aspects of the current and future ATLAS programs to explore hadronic physics.
Pinfold James
doaj +2 more sources
Cosmic dissonance: are new physics or systematics behind a short sound horizon?
Astronomy & Astrophysics, 2020 Context. Persistent tension between low-redshift observations and the cosmic microwave background radiation (CMB), in terms of two fundamental distance scales set by the sound horizon rd and the Hubble constant H0, suggests new physics beyond the ...
N. Arendse +14 more
semanticscholar +1 more source
Room for New Physics in the Rayleigh-Jeans Tail of the Cosmic Microwave Background. [PDF]
Physical Review Letters, 2018 We show that, despite stringent constraints on the shape of the main part of the cosmic microwave background (CMB) spectrum, there is considerable room for its modification within its Rayleigh-Jeans (RJ) end, ω≪T_{CMB}.
M. Pospelov +3 more
semanticscholar +1 more source
Metastable cosmic strings [PDF]
Journal of Cosmology and Astroparticle Physics, 2023 Many symmetry breaking patterns in grand unified theories (GUTs) give rise to cosmic strings that eventually decay when pairs of GUT monopoles spontaneously nucleate along the string cores.
Wilfried Buchmüller +2 more
semanticscholar +1 more source
On the lithium abundance of the visual binary components ξ Boo A (G8V) and ξ Boo B (K5V)
Astronomische Nachrichten, Volume 343, Issue 9-10, November-December 2022., 2022 Abstract A spectroscopic investigation of the lithium resonance doublet in ξ Boo A and ξ Boo B in terms of both abundance and isotopic ratio is presented. We obtained new R = 130,000 spectra with a signal‐to‐noise ratio (S/N) per pixel of up to 3200 using the 11.8 m LBT and PEPSI.
Klaus G. Strassmeier, Matthias Steffen
wiley +1 more source
Future CMB constraints on cosmic birefringence and implications for fundamental physics [PDF]
Physical Review D, 2019 The primary scientific target of the CMB polarization experiments that are currently being built and proposed is the detection of primordial tensor perturbations.
L. Pogosian +3 more
semanticscholar +1 more source
Seven Hints That Early-Time New Physics Alone Is Not Sufficient to Solve the Hubble Tension [PDF]
Universe, 2023 The Hubble tension has now grown to a level of significance which can no longer be ignored and calls for a solution which, despite a huge number of attempts, has so far eluded us.
S. Vagnozzi
semanticscholar +1 more source
Particle physics in cosmic rays [PDF]
International Journal of Modern Physics A, 2021 The Pierre Auger Observatory is the world’s largest detector of ultra-high energy cosmic rays (UHECRs). It uses an array of fluorescence telescopes and particle detectors at the ground to obtain detailed measurements of the energy spectrum, mass composition and arrival directions of primary cosmic rays (above the energy of [Formula: see text] eV) with
openaire +3 more sources
The KASCADE Cosmic-ray Data Centre KCDC: granting open access to astroparticle physics research data [PDF]
The European Physical Journal C, 2018 The ‘KASCADE Cosmic ray Data Centre’ is a web portal (https://kcdc.ikp.kit.edu), where the data of the astroparticle physics experiment KASCADE-Grande are made available for the interested public.
A. Haungs +51 more
semanticscholar +1 more source
DES Y3 cosmic shear down to small scales: Constraints on cosmology and baryons [PDF]
Astronomy & Astrophysics, 2023 We present the first analysis of cosmic shear measured in DES Y3 that employs the entire range of angular scales in the data. To achieve this, we build upon recent advances in the theoretical modelling of weak lensing provided by a combination of $N ...
G. Aricó +18 more
semanticscholar +1 more source