Multiple parton interaction studies at DØ
Abstract
Here, we present the results of studies of multiparton interactions done by the DØ collaboration using the Fermilab Tevatron at a center of mass energy of 1.96 TeV. We also present three analyses, involving three distinct final signatures: (a) a photon with at least 3 jets ( γ + 3jets), (b) a photon with a bottom or charm quark tagged jet and at least 2 other jets ( γ + b/c + 2jets), and (c) two J/ ψ mesons. The fraction of photon + jet events initiated by double parton scattering is about 20%, while the fraction for events in which two J/ ψ mesons were produced is 30 ± 10. While the two measurements are statistically compatible, the difference might indicate differences in the quark and gluon distribution within a nucleon. Finally, this speculation originates from the fact that photon + jet events are created by collisions with quarks in the initial states, while J/ ψ events are produced preferentially by a gluonic initial state.
- Authors:
-
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Publication Date:
- Research Org.:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), High Energy Physics (HEP)
- Contributing Org.:
- D0 Collaboration
- OSTI Identifier:
- 1260274
- Report Number(s):
- FERMILAB-CONF-14-583-E
Journal ID: ISSN 2405-6014; 1467637; TRN: US1601648
- Grant/Contract Number:
- AC02-07CH11359
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Nuclear and Particle Physics Proceedings
- Additional Journal Information:
- Journal Volume: 273-275; Journal Issue: C; Journal ID: ISSN 2405-6014
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; jets; multiparton; photons; J/ψ
Citation Formats
Lincoln, D. Multiple parton interaction studies at DØ. United States: N. p., 2016.
Web. doi:10.1016/j.nuclphysbps.2015.09.344.
Lincoln, D. Multiple parton interaction studies at DØ. United States. https://doi.org/10.1016/j.nuclphysbps.2015.09.344
Lincoln, D. Fri .
"Multiple parton interaction studies at DØ". United States. https://doi.org/10.1016/j.nuclphysbps.2015.09.344. https://www.osti.gov/servlets/purl/1260274.
@article{osti_1260274,
title = {Multiple parton interaction studies at DØ},
author = {Lincoln, D.},
abstractNote = {Here, we present the results of studies of multiparton interactions done by the DØ collaboration using the Fermilab Tevatron at a center of mass energy of 1.96 TeV. We also present three analyses, involving three distinct final signatures: (a) a photon with at least 3 jets ( γ + 3jets), (b) a photon with a bottom or charm quark tagged jet and at least 2 other jets ( γ + b/c + 2jets), and (c) two J/ ψ mesons. The fraction of photon + jet events initiated by double parton scattering is about 20%, while the fraction for events in which two J/ ψ mesons were produced is 30 ± 10. While the two measurements are statistically compatible, the difference might indicate differences in the quark and gluon distribution within a nucleon. Finally, this speculation originates from the fact that photon + jet events are created by collisions with quarks in the initial states, while J/ ψ events are produced preferentially by a gluonic initial state.},
doi = {10.1016/j.nuclphysbps.2015.09.344},
journal = {Nuclear and Particle Physics Proceedings},
number = C,
volume = 273-275,
place = {United States},
year = {Fri Apr 01 00:00:00 EDT 2016},
month = {Fri Apr 01 00:00:00 EDT 2016}
}
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