Study of the energy dependence of the underlying event in proton-antiproton collisions
We study charged particle production (p(T) > 0.5 GeV/c, vertical bar eta vertical bar < 0.8) in proton-antiproton collisions at total center-of-mass energies root 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 eta - phi 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.
- Research Organization:
- 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 Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Organization:
- CDF Collaboration
- DOE Contract Number:
- AC02-07CH11359; AC02-06CH11357; AC02-05CH11231
- OSTI ID:
- 1247128
- Report Number(s):
- FERMILAB-PUB-15-361-E; PRVDAQ; 125589
- Journal Information:
- Physical Review. D, Particles, Fields, Gravitation and Cosmology, Vol. 92, Issue 9; ISSN 1550-7998
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
Theoretical Framework
|
book | October 2016 |
Event generator tunes obtained from underlying event and multiparton scattering measurements
|
text | January 2016 |
Event generator tunes obtained from underlying event and multiparton scattering measurements
|
journal | March 2016 |
Theoretical Framework
|
book | August 2012 |
Theoretical Framework
|
book | August 2013 |
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