Azimuthal decorrelations and multiple parton interactions in γ + 2 jet and γ + 3 jet events in p(bar p) collisions at √s = 1.96 TeV
Description
Samples of inclusive γ + 2 jet and γ + 3 jet events collected by the D0 experiment with an integrated luminosity of about 1 fb-1 in p(bar p) collisions at √s = 1.96 TeV are used to measure cross sections as a function of the angle in the plane transverse to the beam direction between the transverse momentum (pT) of the γ + leading jet system (jets are ordered in pT) and pT of the other jet for γ + 2 jet, or pT sum of the two other jets for γ + 3 jet events. The results are compared to different models of multiple parton interactions (MPI) in the pythia and sherpa Monte Carlo (MC) generators. The data indicate a contribution from events with double parton (DP) interactions and are well described by predictions provided by the pythia MPI models with pT-ordered showers and by sherpa with the default MPI model. The γ + 2 jet data are also used to determine the fraction of events with DP interactions as a function of the azimuthal angle and as a function of the second jet pT.
Availability note (English)
Available from http://lss.fnal.gov/cgi-bin/find_paper.pl?pub-11-007.pdf; PURL: https://www.osti.gov/servlets/purl/1004713-qAVVrE/Additional details
Identifiers
Publishing Information
- Imprint Pagination
- 15 p.
- Report number
- FERMILAB-PUB--11-007-E
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 42031944
- Subject category
- S72: PHYSICS OF ELEMENTARY PARTICLES AND FIELDS;
- Resource subtype / Literary indicator
- Non-conventional Literature
- Descriptors DEI
- CROSS SECTIONS; LUMINOSITY; TRANSVERSE MOMENTUM
- Descriptors DEC
- LINEAR MOMENTUM; OPTICAL PROPERTIES; PHYSICAL PROPERTIES
Optional Information
- Contract/Grant/Project number
- arXiv eprint number arXiv:1101.1509; AC02-76CH03000
- Collaborations
- D0 Collaboration
- Funding organization
- US Department of Energy (United States)