A Study of Parton Distribution Functions with the Use of Photon + Jet Event Kinematics in P[bar P] Collisions at [radical]

A Study of Parton Distribution Functions with the Use of Photon + Jet Event Kinematics in P[bar P] Collisions at [radical]
Author:
Publisher:
Total Pages:
Release: 2005
Genre:
ISBN:

We have measured the leading jet pseudorapidity distribution in photon + jet events selected from the inclusive direct photon event sample. The data are from p[bar p] collisions at [radical]s = 1.8 TeV recorded with CDF in the 1992--1993 run. This measurement has been used to study the behavior of current parton distribution sets in selected kinematic regions. The parton distribution sets CTEQ2M and MRSD0 are currently favored by this measurement.

Scientific and Technical Aerospace Reports

Scientific and Technical Aerospace Reports
Author:
Publisher:
Total Pages: 602
Release: 1995
Genre: Aeronautics
ISBN:

Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.

Study of Double Parton Scattering in Photon + 3 Jets Final State

Study of Double Parton Scattering in Photon + 3 Jets Final State
Author: You-Hao Chang
Publisher: Springer
Total Pages: 107
Release: 2017-01-20
Genre: Science
ISBN: 9811038244

This book mainly focuses on the study of photon + 3 jets final state in Proton-Proton Collisions at √s = 7TeV, searching for patterns of two (or more) distinct hard scatterings in the same collision, i.e the so-called Double Parton Scattering (DPS). A new method by using Monte Carlo generators was performed and provides higher order corrections to the description of the Single Parton Scattering (SPS) background. Further it is investigated whether additional contributions from DPS can improve the agreement between the measured data and the Monte Carlo predictions. The current theoretical uncertainties related to the SPS background are found to be larger than expectation. At the same time a rich set of DPS-sensitive measurements is reported for possible further interpretation.

Double Parton Interactions in Photon+3 Jet Events in Ppbar Collisions Sqrt{s}

Double Parton Interactions in Photon+3 Jet Events in Ppbar Collisions Sqrt{s}
Author:
Publisher:
Total Pages: 15
Release: 2009
Genre:
ISBN:

We have used a sample of photon+3 jets events collected by the D0 experiment with an integrated luminosity of about 1 fb−1 to determine the fraction of events with double parton scattering (f{sub DP}) in a single ppbar collision at √s = 1.96 TeV. The DP fraction and effective cross section (sigma{sub eff}), a process-independent scale parameter related to the parton density inside the nucleon, are measured in three intervals of the second (ordered in p{sub T}) jet transverse momentum pT{sub jet2} within the range 15

Determination of the Parton Distribution Functions of the Proton from ATLAS Measurements of Differential W[plus][minus] and Z Boson Production in Association with Jets

Determination of the Parton Distribution Functions of the Proton from ATLAS Measurements of Differential W[plus][minus] and Z Boson Production in Association with Jets
Author: [Study Group] ATLAS Collaboration CERN
Publisher:
Total Pages: 0
Release: 2021
Genre:
ISBN:

Abstract: This article presents a new set of proton parton distribution functions, ATLASepWZVjet20, produced in an analysis at next-to-next-to-leading order in QCD. The new data sets considered are the measurements of W+ and W− boson and Z boson production in association with jets in pp collisions at s√ = 8 TeV performed by the ATLAS experiment at the LHC with integrated luminosities of 20.2 fb−1 and 19.9 fb−1, respectively. The analysis also considers the ATLAS measurements of differential W± and Z boson production at s√ = 7 TeV with an integrated luminosity of 4.6 fb−1 and deep-inelastic-scattering data from e±p collisions at the HERA accelerator. An improved determination of the sea-quark densities at high Bjorken x is shown, while confirming a strange-quark density similar in size to the up- and down-sea-quark densities in the range x ≲ 0.02 found by previous ATLAS analyses