A study of the energy dependence of the underlying event in proton-antiproton collisions
Abstract
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.
- Authors:
-
- Univ. of Helsinki, Helsinki (Finland). et al.
- Publication Date:
- Research Org.:
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Argonne National Laboratory (ANL), Argonne, IL (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- CDF Collaboration
- OSTI Identifier:
- 1221350
- Alternate Identifier(s):
- OSTI ID: 1227043; OSTI ID: 1454442
- Report Number(s):
- FERMILAB-PUB-15-361-E
Journal ID: ISSN 1550-7998; PRVDAQ; arXiv eprint number arXiv:1508.05340; TRN: US1600882
- Grant/Contract Number:
- AC02-07CH11359; AC02-06CH11357; AC02-05CH11231
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology
- Additional Journal Information:
- Journal Volume: 92; Journal Issue: 09; Journal ID: ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Aaltonen, T. A study of the energy dependence of the underlying event in proton-antiproton collisions. United States: N. p., 2015.
Web. doi:10.1103/PhysRevD.92.092009.
Aaltonen, T. A study of the energy dependence of the underlying event in proton-antiproton collisions. United States. https://doi.org/10.1103/PhysRevD.92.092009
Aaltonen, T. Mon .
"A study of the energy dependence of the underlying event in proton-antiproton collisions". United States. https://doi.org/10.1103/PhysRevD.92.092009. https://www.osti.gov/servlets/purl/1221350.
@article{osti_1221350,
title = {A study of the energy dependence of the underlying event in proton-antiproton collisions},
author = {Aaltonen, T.},
abstractNote = {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.},
doi = {10.1103/PhysRevD.92.092009},
journal = {Physical Review. D, Particles, Fields, Gravitation and Cosmology},
number = 09,
volume = 92,
place = {United States},
year = {Mon Nov 23 00:00:00 EST 2015},
month = {Mon Nov 23 00:00:00 EST 2015}
}
Web of Science
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