Study of the energy dependence of the underlying event in proton-antiproton collisions - INSPIRE

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Study of the energy dependence of the underlying event in proton-antiproton collisions

CDF

Collaboration

•

Timo Antero Aaltonen
(
- Helsinki U. and
- Helsinki Inst. of Phys.
)

Aug 21, 2015

21 pages

Published in:

Phys.Rev.D 92 (2015) 9, 092009

Published: Nov 23, 2015

e-Print:

1508.05340 [hep-ex]

DOI:

10.1103/PhysRevD.92.092009

Report number:

FERMILAB-PUB-15-361-E

Experiments:

FNAL-E-0830

View in:

reference search36 citations

Citations per year

Abstract: (APS)

We study charged particle production (pT>0.5 GeV/c, |η|<0.8) in proton-antiproton collisions at total center-of-mass energies s=300 GeV, 900 GeV, and 1.96 TeV. We use the direction of the charged particle with the largest transverse momentum in each event to define three regions of η-ϕ space: “toward”, “away”, and “transverse.” The average number and the average scalar pT sum of charged particles in the transverse region are sensitive to the modeling of the “underlying event.” The transverse region is divided into a MAX and MIN transverse region, which helps separate the “hard component” (initial and final-state radiation) from the “beam-beam remnant” and multiple parton interaction components of the scattering. The center-of-mass energy dependence of the various components of the event is studied in detail. The data presented here can be used to constrain and improve QCD Monte Carlo models, resulting in more precise predictions at the LHC energies of 13 and 14 TeV.

Note:

24 pages, 19 figures, to be submitted to Phys. Rev. D

13.87.Ce
14.60.Cd
14.60.Ef
anti-p p: colliding beams
charged particle: hadroproduction
anti-p p: scattering
parton: interaction
energy dependence
underlying event
quantum chromodynamics: perturbation theory

References(24)

Figures(0)

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These plots were suggested by the MB&UE working group at the LHC Physics Center at CERN. See the LPCC website at

- http://lpcc.web.cern.ch/LPCC/