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Hydrogen embrittlement in metals (HE) is a serious challenge for the use of high strength materials in engineering practice and a major barrier to the use of hydrogen for global decarbonization. Here we describe the factors and variables…

Antihydrogen is at the forefront of antimatter research at the CERN Antiproton Decelerator. Experiments aiming to test the fundamental CPT symmetry and antigravity effects require the efficient detection of antihydrogen annihilation events,…

Instrumentation and Detectors · Physics 2017-06-07 Peter Sadowski , Balint Radics , Ananya , Yasunori Yamazaki , Pierre Baldi

We demonstrate that criticisms concerning our work nucl-th/9704043, made in the recent preprint hep-ph/9903352, are unfounded. The improvements over our results claimed in hep-ph/9903352 are in fact spurious, being based mainly on…

Nuclear Theory · Physics 2009-10-31 I. B. Khriplovich , R. A. Sen'kov

We demonstrate that the theory presented by A. Fang (Phys. Fluids, v. 34, 013319, 2022) violates the law of conservation of angular momentum, and is therefore false.

Fluid Dynamics · Physics 2022-08-10 Mark I. Shliomis

Because of their unique structure, it has been proposed that carbon nanotube ropes may well provide an ideal container for the storage of molecular hydrogen. Indeed, there has been some experimental evidence of enhanced hydrogen uptake in…

Materials Science · Physics 2015-06-25 Abdenour Sabir , Wenchang Lu , Christopher Roland , Jerzy Bernholc

In their paper arXiv:2405.08189, Supercond. Sci. Technol. 37 (2024) 065010 [1], Bud'ko et al. present experimental results for trapped magnetic flux for a tiny sample of a type II superconductor. The paper aims to provide evidence in…

Superconductivity · Physics 2025-04-17 J. E. Hirsch , F. Marsiglio

Samuely et al. (cond-mat/0503153) make the strong claim that our letter is 'contradicting several established experimental results'. As we will show below this is not justified and the claims from are based on a misinterpretation of our…

Superconductivity · Physics 2007-05-23 J. Kortus , O. V. Dolgov , R. K. Kremer , A. A. Golubov

It is generally believed that magnetization measurements on sulfur hydride under high pressure performed in 2015 [1] provided "final convincing evidence of superconductivity" [2] in that material, in agreement with theoretical predictions…

Superconductivity · Physics 2021-05-13 J. E. Hirsch , F. Marsiglio

We strongly disagree with the procedure used in a recent paper to extract the Zemach moment for hydrogen.

Nuclear Theory · Physics 2014-11-18 J. L. Friar , I. Sick

We present the commissioning of the Fast Annihilation Cryogenic Tracker detector (FACT), installed around the antihydrogen production trap inside the 1 T superconducting magnet of the AE\=gIS experiment. FACT is designed to detect pions…

ALPHA is an experiment at CERN, whose ultimate goal is to perform a precise test of CPT symmetry with trapped antihydrogen atoms. After reviewing the motivations, we discuss our recent progress toward the initial goal of stable trapping of…

In this reply we show that the criticisms raised by J. Noronha are based on a misapplication of the model we have proposed in [A. Jaouadi, M. Telmini, E. Charron, Phys. Rev. A 83, 023616 (2011)]. Here we explicitly discuss the range of…

Quantum Physics · Physics 2015-07-09 A Jaouadi , M Telmini , Eric Charron

We evaluate the accuracy to be expected for the measurement of free fall acceleration of antihydrogen in the GBAR experiment, accounting for the recoil transferred in the photodetachment process. We show that the uncertainty on the…

This manuscript provides a response to a recent report by Mazzone et al. available online on arXiv that, in turn, tentatively aims at demonstrating the inefficacy of proton boron capture in hadrotherapy. We clarify that Mazzone et al. do…

We describe the origin, development, and status of the Los Alamos antiproton catching trap. Originally designed for the antiproton gravity experiment, it now is clear that this device can be a source of low-energy antiprotons for a wide…

High Energy Physics - Phenomenology · Physics 2009-10-28 Michael Martin Nieto , Michael H. Holzscheiter

We demonstrate three-dimensional annihilation imaging of antiprotons trapped in a Penning trap. Exploiting unusual feature of antiparticles, we investigate a previously unexplored regime in particle transport; the proximity of the trap…

The ALPHA collaboration has successfully demonstrated the production and the confinement of cold antihydrogen, $\overline{\mathrm{H}}$. An analysis of trapping data allowed a stringent limit to be placed on the electric charge of the…

CERN announced in January 1996 the detection of the first eleven atoms of antimatter ever produced. The experiment was based on a method proposed earlier by S. Brodsky, C. Munger and I. Schmidt, and which furthermore predicted exactly the…

High Energy Physics - Phenomenology · Physics 2009-10-30 Ivan Schmidt

The preceding Comment [1], previously posted as arXiv:2312.04495 [2], on our paper J. Supercond. Nov. Mag. 35, 3141 (2022) [3] provides a welcome opportunity to clarify what we understand to be pervading misconceptions by Eremets, Minkov…

Superconductivity · Physics 2024-12-10 J. E. Hirsch , F. Marsiglio

Metallic hydrogen, existing in remarkably extreme environments, was predicted to exhibit long-sought room-temperature superconductivity. Although the superconductivity of metallic hydrogen has not been confirmed experimentally,…

Superconductivity · Physics 2024-06-12 Zihan Zhang , Wendi Zhao , Defang Duan , Tian Cui