Results 101 to 110 of about 85,529 (240)

Measurement of the Z γ → ν ν ¯ γ $$ Z\gamma \to \nu \overline{\nu}\gamma $$ production cross section in pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV with the ATLAS detector and limits on anomalous triple gauge-boson couplings

open access: yesJournal of High Energy Physics, 2018
The production of Z bosons in association with a high-energy photon (Zγ production) is studied in the neutrino decay channel of the Z boson using pp collisions at s = 13 $$ \sqrt{s}=13 $$ TeV. The analysis uses a data sample with an integrated luminosity
The ATLAS collaboration   +2933 more
doaj   +1 more source

Spin and Polarization in High-Energy Hadron-Hadron and Lepton-Hadron Scattering [PDF]

open access: yesSymmetry, 2020
The role of spin degrees of freedom in high-energy hadron-hadron and lepton-hadron scattering is reviewed with emphasis on the dominant role of soft, diffractive, non-perturbative effects. Explicit models based on analyticity and Regge-pole theory, including the pomeron trajectory (gluon exchange in the t channel) are discussed.
openaire   +2 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

Measurements of WH and ZH production with Higgs boson decays into bottom quarks and direct constraints on the charm Yukawa coupling in 13 TeV pp collisions with the ATLAS detector

open access: yesJournal of High Energy Physics
A study of the Higgs boson decaying into bottom quarks (H → b b ¯ $$ b\overline{b} $$ ) and charm quarks (H → c c ¯ $$ c\overline{c} $$ ) is performed, in the associated production channel of the Higgs boson with a W or Z boson, using 140 fb −1 of proton-
The ATLAS collaboration   +2943 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

Complex Meson Spectroscopy

open access: yes, 2005
We do meson spectroscopy by studying the behavior of S-matrix poles in the complex-energy plane, as a function of the coupling strength for triplet-P-zero quark-pair creation.
Kleefeld, Frieder   +2 more
core   +1 more source

Studies of Parity Violation in Atoms

open access: yesAnnalen der Physik, Volume 537, Issue 2, February 2025.
This article provides an overview of atomic parity violation (APV), emphasizing its role in testing the Standard Model and probing new physics. The review discusses manifestations of APV, including nuclear‐spin‐independent and dependent effects, and explores isotopic comparison as a method for precision measurements.
Stefanos Nanos   +2 more
wiley   +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

Search for direct production of electroweakinos in final states with missing transverse momentum and a Higgs boson decaying into photons in pp collisions at s $$ \sqrt{s} $$ = 13 TeV with the ATLAS detector

open access: yesJournal of High Energy Physics, 2020
A search for a chargino-neutralino pair decaying via the 125 GeV Higgs boson into photons is presented. The study is based on the data collected between 2015 and 2018 with the ATLAS detector at the LHC, corresponding to an integrated luminosity of 139 fb
The ATLAS collaboration   +2940 more
doaj   +1 more source

Energy-dependent dipole form factor in a QCD-inspired model

open access: yes, 2015
We consider the effect of an energy-dependent dipole form factor in the high-energy behavior of the forward amplitude. The connection between the semihard parton-level dynamics and the hadron-hadron scattering is established by an eikonal QCD-based model.
Bahia, C. A. S.   +2 more
core   +1 more source

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