Results 111 to 120 of about 163,610 (256)

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

Search for same-charge top-quark pair production in pp collisions at s $$ \sqrt{\textrm{s}} $$ = 13 TeV with the ATLAS detector

open access: yesJournal of High Energy Physics
A search for the production of top-quark pairs with the same electric charge (tt or tt ¯ $$ \overline{tt} $$ ) is presented. The analysis uses proton-proton collision data at s $$ \sqrt{s} $$ = 13 TeV, recorded by the ATLAS detector at the Large Hadron ...
The ATLAS collaboration   +2926 more
doaj   +1 more source

Measurement of the Drell-Yan triple-differential cross section in pp collisions at s=8 $$ \sqrt{s}=8 $$ TeV

open access: yesJournal of High Energy Physics, 2017
This paper presents a measurement of the triple-differential cross section for the Drell-Yan process Z/γ * → ℓ + ℓ − where ℓ is an electron or a muon. The measurement is performed for invariant masses of the lepton pairs, m ℓℓ , between 46 and 200 GeV ...
The ATLAS collaboration   +2891 more
doaj   +1 more source

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

Hadron mass corrections in semi-inclusive deep-inelastic scattering

open access: yes, 2015
The spin-dependent cross sections for semi-inclusive lepton-nucleon scattering are derived in the framework of collinear factorization, including the effects of masses of the target and produced hadron at finite momentum transfer squared Q^2.
Accardi, A.   +4 more
core   +1 more source

Search for a CP-odd Higgs boson decaying into a heavy CP-even Higgs boson and a Z boson in the ℓ + ℓ − t t ¯ $$ {\ell}^{+}{\ell}^{-}t\overline{t} $$ and ν ν ¯ b b ¯ $$ \nu \overline{\nu}b\overline{b} $$ final states using 140 fb −1 of data collected with the ATLAS detector

open access: yesJournal of High Energy Physics
A search for a heavy CP-odd Higgs boson, A, decaying into a Z boson and a heavy CP-even Higgs boson, H, is presented. It uses the full LHC Run 2 dataset of pp collisions at s $$ \sqrt{s} $$ = 13 TeV collected with the ATLAS detector, corresponding to an ...
The ATLAS collaboration   +2942 more
doaj   +1 more source

Searches for third-generation scalar leptoquarks in s $$ \sqrt{s} $$ = 13 TeV pp collisions with the ATLAS detector

open access: yesJournal of High Energy Physics, 2019
Limits are set on the pair production of scalar leptoquarks, where all possible decays of the leptoquark into a quark (t, b) and a lepton (τ, ν) of the third generation are considered. The limits are presented as a function of the leptoquark mass and the
The ATLAS collaboration   +2893 more
doaj   +1 more source

Hadron multiplicity in pp and AA collisions at LHC from the Color Glass Condensate

open access: yes, 2010
We provide quantitative predictions for the rapidity, centrality and energy dependencies of inclusive charged-hadron productions for the forthcoming LHC measurements in nucleus-nucleus collisions based on the idea of gluon saturation in the color-glass ...
Amir H. Rezaeian   +5 more
core   +1 more source

Search for new particles in final states with a boosted top quark and missing transverse momentum in proton-proton collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

open access: yesJournal of High Energy Physics
A search for events with one top quark and missing transverse momentum in the final state is presented. The fully hadronic decay of the top quark is explored by selecting events with a reconstructed boosted top-quark topology produced in association with
The ATLAS collaboration   +2934 more
doaj   +1 more source

On equivalence of gluon-loop exchange in the inelastic processes in perturbative QCD to pion exchange in ɸ3 theory

open access: yesEPJ Web of Conferences, 2013
We consider the hadron–hadron inelastic scattering in the framework of QCD perturbation theory. It is shown that in QCD, due to conservation of color, the tree-level diagrams of inelastic scattering are prohibited and one has to deal with the diagrams ...
Sharf Igor   +9 more
doaj   +1 more source

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