Explanipedia

Suppression of pair beam instabilities in a laboratory analogue of blazar pair cascades Open

Charles Arrowsmith, Francesco Miniati, Pablo J. Bilbao, P. Simon, A. F. A. Bott , et al. · 2025

The generation of dense electron–positron pair beams in the laboratory can enable direct tests of theoretical models of γ -ray bursts and active galactic nuclei. We have successfully achieved this using ultrarelativistic protons accelerate…

An Advance and Hybrid State-of-Charge Measurement Technique for Battery Management System Open

S. Sarkar, Biplab Satpati · 2025

Battery Management System is a vital component in any battery driven device or facility. It is used to measure and control all the major battery parameters for better efficiency and performances. In today’s world each and every powered sys…

Clustering properties of the CatWISE2020 quasar catalogue and their impact on the cosmic dipole anomaly Open

Sebastian von Hausegger, Nathan J. Secrest, Harry Desmond, S. Sarkar · 2025

The cosmic dipole anomaly -- the observation of a significant mismatch between the dipole observed in the matter distribution and that expected given the kinematic interpretation of the cosmic microwave background dipole -- poses a serious…

An Analytical Model of Anisotropic Charged Strange Star and Prediction of Mass Admitting MIT Bag Equation of State Open

S. Sarkar · 2025

In this study, we investigate the relativistic star model while accounting for pressure anisotropy. Anisotropic solution to Einstein equation has been pro- posed for strange quark stars using the inner space time geometry defined by the me…

QSHS: an axion dark matter resonant search apparatus Open

A Alsulami, I. Bailey, G. Carosi, Gavin Chapman, B. Chakraborty , et al. · 2025

We describe a resonant cavity search apparatus for axion dark matter constructed by the quantum sensors for the hidden sector collaboration. The apparatus is configured to search for QCD axion dark matter, though also has the capability to…

Search for heavy axions with the European X-Ray Free Electron Laser Open

S. Sarkar, Charles Arrowsmith, Carsten Baehtz, Konstantin Beyer, R. Bingham , et al. · 2025

Measurement of ion acceleration and diffusion in a laser-driven magnetized plasma Open

J. Chu, Jack Halliday, Charles Heaton, K. Moczulski, A. Blažević , et al. · 2025

Here we present results from an experiment performed at the GSI Helmholtz Centre for Heavy Ion Research. A mono-energetic beam of chromium ions with initial energies of ∼ 450 MeV was fired through a magnetized interaction region formed by …

<i>Colloquium</i> : The cosmic dipole anomaly Open

Nathan J. Secrest, Sebastian von Hausegger, M. Rameez, Roya Mohayaee, S. Sarkar · 2025

International audience

Anisotropy in Pantheon+ supernovae Open

Animesh Sah, M. Rameez, S. Sarkar, Christos G. Tsagas · 2025

We employ maximum likelihood estimators to examine the Pantheon+ catalogue of Type Ia supernovae for large scale anisotropies in the expansion rate of the Universe. The analyses are carried out in the heliocentric frame, the CMB frame, as …

Colloquium: The Cosmic Dipole Anomaly Open

Nathan J. Secrest, Sebastian von Hausegger, M. Rameez, Roya Mohayaee, S. Sarkar · 2025

The Cosmological Principle, which states that the Universe is homogeneous and isotropic (when averaged on large scales), is the foundational assumption of Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmologies such as the current standard …

Sedimentology, sequence stratigraphy and geochemical reappraisal of the Mesoproterozoic Rampur Shale, Vindhyan Basin, India: Implications for paleoenvironment and basin evolution Open

Indrani Mondal, Adrita Choudhuri, Tathagata Roy Choudhury, Shilpa Srimani, Amlan Koner , et al. · 2025

A rare vascular anomaly Open

Manu Chopra, Ritwik Chakrabarty, S. Sarkar · 2025

Effective Vendor Management Open

S. Sarkar, Seema Solanki, Mrs. Harshita Gaikwad · 2025

In an increasingly globalized and competitive business environment, effective vendor management has become a strategic priority for organizations aiming to optimize costs, enhance service quality, and maintain operational efficiency. This …

Manifesto: challenging the standard cosmological model Open

James Binney, Roya Mohayaee, J. A. Peacock, S. Sarkar · 2025

We outline the rationale for holding a Discussion Meeting thus titled at the Royal Society, London during 15 and 16 April 2024, and summarize what we learnt there. This article is part of the discussion meeting issue ‘Challenging the stand…

Bounds on Heavy Axions with an X-Ray Free Electron Laser Open

Jack Halliday, Giacomo Marocco, Konstantin A. Beyer, Charles Heaton, M. Nakatsutsumi , et al. · 2025

We present new exclusion bounds obtained at the European X-Ray Free Electron Laser facility (EuXFEL) on axionlike particles in the mass range 10−3 eV≲ma≲104 eV. Our experiment exploits the Primakoff effect via which photons can, in the p…

Forty years of the Ellis–Baldwin test Open

Nathan J. Secrest, Sebastian von Hausegger, M. Rameez, Roya Mohayaee, S. Sarkar · 2025

Do People Care About ‘Waste Segregation at Source’? A Choice Experiment Survey to Estimate the Willingness to Pay for Improved Waste Management Open

Debalina Saha, S. Sarkar, HARSHA TIWARY · 2025

Structure-Aware Stable Diffusion Open

Kriti Khare, S. Sarkar, Parimala Kancharla · 2025

Dynamical development of strength and stability of asteroid material under 440 GeV proton beam irradiation Open

Melanie Bochmann, Karl-Georg Schlesinger, Charles Arrowsmith, Paraskevi Alexaki, M. Poza , et al. · 2024

The material properties of asteroid samples exhibit a dynamic response under high-energy irradiation, which no experiments have yet been able to cover. However, studying the material response of asteroid material is relevant in several fie…

Erratum: First Search for Dyons with the Full MoEDAL Trapping Detector in 13 TeV Collisions [Phys. Rev. Lett. <b>126</b>, 071801 (2021)] Open

B. S. Acharya, Jean Alexandre, P. Beneš, B. Bergmann, J. Bernabéu , et al. · 2024

This corrects the article DOI: 10.1103/PhysRevLett.126.071801.

Numerical simulations of laser-driven experiments of ion acceleration in stochastic magnetic fields Open

K. Moczulski, Han Wen, Thomas F. Campbell, Anthony Scopatz, C. A. J. Palmer , et al. · 2024

We present numerical simulations used to interpret laser-driven plasma experiments at the GSI Helmholtz Centre for Heavy Ion Research. The mechanisms by which non-thermal particles are accelerated in astrophysical environments, e.g., the s…

Anisotropy in Pantheon+ supernovae Open

A. K. Sah, M. Rameez, S. Sarkar, Christos G. Tsagas · 2024

We employ Maximum Likelihood Estimators to examine the Pantheon+ catalogue of Type Ia supernovae for large scale anisotropies in the expansion rate of the Universe. The analyses are carried out in the heliocentric frame, the CMB frame, as …

Discovering neutrino tridents at the Large Hadron Collider Open

Wolfgang Altmannshofer, Toni Mäkelä, S. Sarkar, Sebastian Trojanowski, Keping Xie , et al. · 2024

Neutrino trident production of dilepton pairs is well recognized as a sensitive probe of both electroweak physics and physics beyond the Standard Model. Although a rare process, it could be significantly boosted by such new physics, and it…

Laboratory realization of relativistic pair-plasma beams Open

Charles Arrowsmith, P. Simon, Pablo J. Bilbao, A. F. A. Bott, S. Bürger , et al. · 2024

Measuring Unruh radiation from accelerated electrons Open

G. Gregori, Giacomo Marocco, S. Sarkar, R. Bingham, C. Wang · 2024

Detecting thermal Unruh radiation from accelerated electrons has presented a formidable challenge due not only to technical difficulties but also for lack of conceptual clarity about what is actually seen by a laboratory observer. We give …

Cosmological Inference from within the Peculiar Local Universe Open

Roya Mohayaee, M. Rameez, S. Sarkar · 2024

The existence of ‘peculiar’ velocities due to the formation of cosmic structure marks a point of discord between the real universe and the usually assumed Friedmann–Lemaítre–Robertson–Walker metric, which accomodates only the smooth Hubble…

Bounds on heavy axions with an X-ray free electron laser Open

Jack Halliday, Giacomo Marocco, Konstantin A. Beyer, Charles Heaton, M. Nakatsutsumi , et al. · 2024

We present new exclusion bounds obtained at the European X-ray Free Electron Laser facility (EuXFEL) on axion-like particles (ALPs) in the mass range 10^{-3} eV < m_a < 10^4 eV. Our experiment exploits the Primakoff effect via which photon…

Laboratory realization of relativistic pair-plasma beams Open

Charles Arrowsmith, P. Simon, Pablo J. Bilbao, A. F. A. Bott, Stephane Burger , et al. · 2024

Relativistic electron-positron (e^±)plasmas are ubiquitous in extreme astrophysical environments such as black holes and neutron star magnetospheres, where accretion-powered jets and pulsar winds are expected to be enriched with …

Laboratory realization of relativistic pair-plasma beams Open

Charles Arrowsmith, P. Simon, Pablo J. Bilbao, A. F. A. Bott, S. Bürger , et al. · 2023

Relativistic electron-positron plasmas are ubiquitous in extreme astrophysical environments such as black holes and neutron star magnetospheres, where accretion-powered jets and pulsar winds are expected to be enriched with such pair plasm…

Ruling out light axions: The writing is on the wall Open

Konstantin A. Beyer, S. Sarkar · 2023

We revisit the domain wall problem for QCD axion models with more than one quark charged under the Peccei-Quinn symmetry. Symmetry breaking during or after inflation results in the formation of a domain wall network which would cause cosmi…

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