Results 71 to 80 of about 54,130 (180)

Ferrites with a Minimized Secondary Electron Yield

open access: yesAdvanced Science, Volume 12, Issue 10, March 13, 2025.
Ferrites are a key material in particle accelerators and space science, exposing them to high energy electrons and leading to multipacting, charging and electron cloud formation. Laser engineered surface structures are shown to dramatically reduce the secondary electron yield of ferrite eliminating these issues.
Robin Uren   +10 more
wiley   +1 more source

Parton Propagation and Fragmentation in QCD Matter

open access: yes, 2009
We review recent progress in the study of parton propagation, interaction and fragmentation in both cold and hot strongly interacting matter. Experimental highlights on high-energy hadron production in deep inelastic lepton-nucleus scattering, proton ...
Accardi, Alberto   +4 more
core   +2 more sources

Measurements of b-jet tagging efficiency with the ATLAS detector using tt¯ $$ t\overline{t} $$ events at s=13 $$ \sqrt{s}=13 $$ TeV

open access: yesJournal of High Energy Physics, 2018
The efficiency to identify jets containing b-hadrons (b-jets) is measured using a high purity sample of dileptonic top quark-antiquark pairs ( tt¯ $$ t\overline{t} $$) selected from the 36.1 fb−1 of data collected by the ATLAS detector in 2015 and 2016 ...
The ATLAS collaboration   +2913 more
doaj   +1 more source

A search for the decays of stopped long-lived particles at s $$ \sqrt{\mathrm{s}} $$ = 13 TeV with the ATLAS detector

open access: yesJournal of High Energy Physics, 2021
A search for long-lived particles, which have come to rest within the ATLAS detector, is presented. The subsequent decays of these particles can produce high-momentum jets, resulting in large out-of-time energy deposits in the ATLAS calorimeters.
The ATLAS collaboration   +2888 more
doaj   +1 more source

Exploring Dark Photon Production and Kinetic Mixing Constraints in Heavy‐Ion Collisions

open access: yesAstronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT Vector U‐bosons, often referred to as “dark photons,” are potential candidates for mediating dark matter interactions. In this study, we outline a procedure to derive theoretical constraints on the upper bound of the kinetic mixing parameter ϵ2MU$$ {\upvarepsilon}^2\left({M}_U\right) $$ using dilepton data from heavy‐ion from SIS to RHIC ...
Adrian William Romero Jorge   +3 more
wiley   +1 more source

Rescattering effects in hadron-nucleus and heavy-ion collisions

open access: yes, 2005
We review the extension of the factorization formalism of perturbative QCD to {\it coherent} soft rescattering associated with hard scattering in high energy nuclear collisions.
0207   +34 more
core   +1 more source

The high-energy hadron spin-flip amplitude at small momentum transfer and new AN data from RHIC [PDF]

open access: yes, 2004
In the case of elastic high-energy hadron-hadron scattering, the impact of the large-distance contributions on the behaviour of the slopes of the spin-non-flip and of the spin-flip amplitudes is analysed.
)   +38 more
core   +3 more sources

Visible GeV ALP from TeV Vector‐Like Leptons

open access: yesFortschritte der Physik, Volume 73, Issue 3, March 2025.
Abstract A model is presented where a GeV axion‐like‐particle (ALP) is predicted in a large portion of the parameter space due to the presence of explicit Peccei–Quinn (PQ) symmetry‐breaking terms in an exotic leptonic sector. The latter provides a solution to the muon g−2$g-2$ anomaly, within the framework of the Linear Seesaw neutrino mechanism.
Arturo de Giorgi   +2 more
wiley   +1 more source

QCD: Challenges for the Future [PDF]

open access: yes, 1996
Despite many experimental verifications of the correctness of our basic understanding of QCD, there remain numerous open questions in strong interaction physics and we focus on the role of future colliders in addressing these questions.
Burrows, P.   +3 more
core   +3 more sources

Gluon Polarization from Correlated High-p_T Hadron Pairs in Polarized l - N Scattering

open access: yes, 1997
We propose to access the gluon polarization $\Delta G$ by measuring the cross section spin-asymmetry in semi-inclusive polarized lepton -- nucleon scattering.
Bravar, A.   +2 more
core   +1 more source

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