Results 111 to 120 of about 58,635 (189)
Skewed parton distributions [PDF]
Nuclear Physics A, 2000 Applications of perturbative QCD to deeply virtual Compton scattering and hard exclusive electroproduction processes require a generalization of usual parton distributions for the case when long-distance information is accumulated in nonforward matrix elements of quark and gluon light-cone operators.
openaire +2 more sources
Azimuthal anisotropy at high transverse momentum in p-p and p-A collisions
Physics Letters BWe explore the possibility that the initial transverse momentum distribution of unpolarized and polarized partons within unpolarized nucleons, both with and without the anisotropy of unpolarized hadrons produced in the fragmentation of outgoing partons ...
Ismail Soudi, Abhijit Majumder
doaj +1 more source
Next-to-leading order QCD calculations with parton showers II: soft singularities
, 2003 Programs that calculate observables in quantum chromodynamics at next-to-leading order typically generate events that consist of partons rather than hadrons -- and just a few partons at that.
B. Pötter +24 more
core +1 more source
Physics Letters B, 2014 We show that the incoherent elastic scattering of partons, as present in a multi-phase transport model (AMPT), with a modest parton–parton cross-section of σ=1.5–3 mb, naturally explains the long-range two-particle azimuthal correlation as observed in ...
Guo-Liang Ma, Adam Bzdak
doaj +1 more source
Border and skewness functions from a leading order fit to DVCS data
European Physical Journal C: Particles and Fields, 2018 We propose new parameterizations for the border and skewness functions appearing in the description of 3D nucleon structure in the language of generalized parton distributions (GPDs).
H. Moutarde, P. Sznajder, J. Wagner
doaj +1 more source
Can We Measure Parton-Parton Cross Sections? [PDF]
Physical Review D, 1973 Multiple-core production in hadron-hadron collisions directly measures (in the context of the parton model) differential cross sections for parton-parton collisions. To obtain \ensuremath{\sim}20% accuracy in reconstruction of the parton-parton kinematics requires transverse momentum of the cores \ensuremath{\gtrsim} 5 GeV/c. Experiments at NAL as well
openaire +1 more source
Two-particle correlation via Bremsstrahlung
EPJ Web of Conferences, 2017 Ridge is the well-known structure in two-particle angular correlations at highenergy heavy-ion collisions. This structure is physically understood through elliptic and higher-order flows at nucleus-nucleus collisions. This behavior is also found in small
Cho Soyeon, Park Kayoung, Yoon Jin-Hee
doaj +1 more source
QCD radiative corrections to parton-parton scattering
Nuclear Physics B, 1986 We present the matrix elements squared for all (2 → 2) and (2 → 3) parton scattering subprocesses calculated at O(αs3). The matrix elements are presented in n dimensions to regulate singularities due to the emission of soft or collinear radiation. We use these results to discuss one-hadron inclusive scattering, considering only a limited number of ...
R.K. Ellis, J.C. Sexton
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Anisotropic Flow in the Few Collisions Regime: Application to Bottomonia
Proceedings, 2019 Considering the kinetic Boltzmann equation in the limit of very few collisions, we study the evolution of the phase space distribution of bottomonia interacting with an expanding gas of massless partons. We investigate the scaling of the anisotropic flow
Nina Kersting +2 more
doaj +1 more source
Structure of parton showers including quantum interference [PDF]
, 2008 It is useful to describe a leading order parton shower as the solution of a linear equation that specifies how the state of the partons evolves. This description involves an essential approximation of a strong ordering of virtualities as the shower ...
Nagy, Zoltan, Soper, Davison E.
core +1 more source