Abstract
Inclusive jet production in p-p and pbar-p collisions shows many of the same kinematic systematics as observed in single particle inclusive production at much lower energies. In an earlier study (1974) a phenomenology, called radial scaling, was developed for the single particle inclusive cross sections that attempted to capture the essential underlying physics of point-like parton scattering and the fragmentation of partons into hadrons suppressed by the kinematic boundary. The phenomenology was successful in emphasizing the underlying systematics of the inclusive particle productions. Here we demonstrate that inclusive jet production at the LHC in high-energy p-p collisions and at the Tevatron in pbar-p inelastic scattering show similar behavior. The ATLAS inclusive jet production plotted as a function of this scaling variable is studied for sqrt(s) of 2.76, 7 and 13 TeV and is compared to pbar-p inclusive jet production at 1.96 TeV measured at the CDF and D0 at the Tevatron and p-Pb inclusive jet production at the LHC ATLAS at sqrt(sNN) = 5.02 TeV. Inclusive single particle production at FNAL fixed target and ISR energies are compared to inclusive J/Psi production at the LHC measured in ATLAS, CMS and LHCb. Striking common features of the data are discussed.
Highlights
Single-particle inclusive productions were studied extensively in the early 1970s as a hadronic analogue to deep inelastic electron-nucleon scattering studies conducted at SLAC
The same general quest has been followed in inclusive jet production at hadron colliders (LHC and Tevatron) to test quantum chromodynamics (QCD) and to provide the standard model foundation for searches for a phenomenon beyond the standard model
Comparison with inclusive jet simulations. It is not the object of this paper to appraise the quality of the perturbative quantum chromodynamics (pQCD) simulations of inclusive jet production, but it is of interest to check that the simulations show the same power-law behaviors
Summary
Single-particle inclusive productions were studied extensively in the early 1970s as a hadronic analogue to deep inelastic electron-nucleon scattering studies conducted at SLAC. The earlier analyses of data indicated that the singleparticle inclusive cross section Ed3σ/dp had power-law dependences on the transverse momentum pT and on the variable (1-xR) that roughly factorizes in the form, d3σ E dp. More extensive data taken at the ISR showed that there is an overall s dependence beyond that embodied in the xR variable [8] and this narrowly defined radial scaling was violated Even with this additional s dependence, the radial scaling formulation was helpful in revealing systematics of the single-particle inclusive cross sections. The theoretical underpinning of single-particle inclusive production and jet inclusive production is the same—namely, both are described by hard scattering of incoming partons, followed by fragmentation and hadronization, only in the case of jet production an ensemble of particles carrying the scattered parton momentum is collimated and forms a jet.
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