Results 21 to 30 of about 163,610 (256)

Factorization at higher twist in hadron-hadron scattering

open access: yesNuclear Physics B, 1984
Abstract We study one-loop soft gluon effects in a scalar quark QCD model of the Drell-Yan process. We find that factorization of the type suggested by Politzer holds at order m 2 / s , but fails at order m 4 / s 2 . We suggest that this pattern holds to higher orders, and that the non-factoring terms are not suppressed by form factors.
George Sterman   +2 more
openaire   +3 more sources

Isospin quantum distances in hadron-hadron scattering

open access: yesPhysics Letters B, 1996
Abstract In this paper, the quantum distances between two isospin channels, in the Hilbert space of the hadron-hadron scattering amplitudes, are introduced. These isospin quantum distances, as well as their isospin bounds, are expressed in terms of the channel cross sections and polarisation parameters.
D.B. Ion, M.L.D. Ion
openaire   +3 more sources

Soft high-energy hadron-hadron scattering

open access: yesPhysics Letters B, 1992
Abstract Total cross sections and the slope parameters of the elastic differential cross sections in hadron-hadron scattering are evaluated in a scheme based on a simple stochastic model for the physical vacuum.
A. Krämer   +2 more
openaire   +3 more sources

Saturation of optimality limits in hadron-hadron scatterings

open access: green, 2003
In this paper the optimal unitarity lower bound on logarithmic slope of the diffraction peak is investigated. It is shown that the unitarity lower bound is just the optimal logarithmic slopes predicted by the principle of least distance in space of states.
D. B. Ion, Rodica‐Mariana Ion
openalex   +4 more sources

The multiple scattering contribution to fixed-angle elastic hadron-hadron scattering

open access: yesNuclear Physics B, 1991
Abstract Using the factorized form of the leading behavior (in powers of Q) of fixed-angle elastic hadron-hadron scattering given by Botts and Sterman, the leading perturbative QCD contribution to dσ/dt (ϑ = π/2) for pions and protons is numerically evaluated.
J. Botts
openaire   +3 more sources

Non-perturbative contributions to high energy hadron-hadron scattering

open access: yesPhysics Letters B, 1991
Abstract We evaluate non-perturbative contributions to high energy hadron-hadron scattering in a stochastic model for the physical vacuum. The vacuum parameters determined from high energy scattering agree well with those determined from hadron spectroscopy.
A. Krämer, H. G. Dosch
openaire   +3 more sources

An experiment for electron-hadron scattering at the LHC [PDF]

open access: yesThe European Physical Journal C, 2022
Novel considerations are presented on the physics, apparatus and accelerator designs for a future, luminous, energy frontier electron-hadron ( eh ) scattering experiment at the LHC in the thirties for which key physics topics and their relation to the ...
K. André   +25 more
semanticscholar   +1 more source

Search for neutral long-lived particles in pp collisions at s $$ \sqrt{s} $$ = 13 TeV that decay into displaced hadronic jets in the ATLAS calorimeter

open access: yesJournal of High Energy Physics, 2022
A search for decays of pair-produced neutral long-lived particles (LLPs) is presented using 139 fb −1 of proton-proton collision data collected by the ATLAS detector at the LHC in 2015–2018 at a centre-of-mass energy of 13 TeV.
The ATLAS collaboration   +2867 more
doaj   +1 more source

Out-of-field neutron radiation from clinical proton, helium, carbon, and oxygen ion beams. [PDF]

open access: yesMed Phys
Abstract Background In hadron therapy, out‐of‐field doses, which may in the long‐term cause secondary cancers, are mostly due to neutrons. Very recently, 4He and 16O beams have been added to protons and 12C ions for clinical therapy. Purpose The focus of this article is to compare secondary neutron doses produced by clinical protons, 4He, 12C, and 16O ...
Bolzonella M   +11 more
europepmc   +2 more sources

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