Study Of Double Parton Interactions In Diphoton Dijet Events In P Bar P Collisions At Sqrt S

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Study Of Double Parton Interactions In Diphoton Dijet Events In P Bar P Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2016

Study Of Double Parton Interactions In Diphoton Dijet Events In P Bar P Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

Scientific And Technical Aerospace Reports

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Author :
language : en
Publisher:
Release Date : 1995

Scientific And Technical Aerospace Reports written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Aeronautics categories.

Double Parton Interactions In Photon 3 Jet Events In Ppbar Collisions Sqrt S

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language : en
Publisher:
Release Date : 2009

Double Parton Interactions In Photon 3 Jet Events In Ppbar Collisions Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.

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

D0 Results On Diphoton Direct Production And Double Parton Interactions In Photon 3 Jet Events

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Author :
language : en
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Release Date : 2010

D0 Results On Diphoton Direct Production And Double Parton Interactions In Photon 3 Jet Events written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.

We report the measurement of differential diphoton direct production cross sections and a study of photon + 3-jet events with double parton (DP) interactions, based on data taken with the D0 experiment at the Fermilab Tevatron proton-antiproton collider. We measure single differential cross sections as a function of the diphoton mass, the transverse momentum of the diphoton system, the azimuthal angle between the photons, and the polar scattering angle of the photons. In addition, we measure double differential cross sections considering the last three kinematic variables in three diphoton mass bins. The results are compared with different perturbative QCD predictions and event generators. We have used a sample of photon + 3-jet 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 p{bar p} 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 p{sub T}{sup jet2} within the range 15

Study Of Double Parton Scattering Using W 2 Jet Events In Proton Proton Collisions At Sqrt S

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Author :
language : en
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Release Date : 2014

Study Of Double Parton Scattering Using W 2 Jet Events In Proton Proton Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with categories.

Double parton scattering is investigated in proton-proton collisions at √s = 7 TeV where the final state includes a W boson, which decays into a muon and a neutrino, and two jets. The data sample corresponds to an integrated luminosity of 5 fb-1, collected with the CMS detector at the LHC. Observables sensitive to double parton scattering are investigated after being corrected for detector effects and selection efficiencies. The fraction of W + 2-jet events due to double parton scattering is measured to be 0.055 +/- 0.002 (stat.) +/- 0.014 (syst.). Finally, the effective cross section, [sigma]eff, characterizing the effective transverse area of hard partonic interactions in collisions between protons is measured to be 20.7 +/- 0.8 (stat.) +/- 6.6 (syst.) mb.

Double Parton Scattering In P Bar P Interactions At Sqrt S

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Author :
language : en
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Release Date : 2016

Double Parton Scattering In P Bar P Interactions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.

We present the observation of doubly produced $J / \psi$ mesons as an example of processes containing a substantial fraction of double parton scattering. Measurements of the production cross sections for singly and doubly-produced $J/\psi$ mesons were done with the D0 detector at Fermilab in $p\bar{p}$ collisions at $\sqrt{s}$ = 1.96 TeV with an integrated luminosity of 8.1 fb$^{-1}$. For the first time, the double $J / \psi$ production cross section is separated into two parts: contributions from both single and double parton scattering. Lastly, this separation allowed us to determine the effective cross section [sigma]eff, a parameter related to the parton spatial density inside the hadron.

Searches For New Physics In Diphoton Events In P Bar P Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 1998

Searches For New Physics In Diphoton Events In P Bar P Collisions At Sqrt S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1998 with categories.

A Study Of Parton Distribution Functions With The Use Of Photon Jet Event Kinematics In P Bar P Collisions At Radical

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language : en
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Release Date : 2005

A Study Of Parton Distribution Functions With The Use Of Photon Jet Event Kinematics In P Bar P Collisions At Radical written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with categories.

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.

The Diphoton Production Rate In Bar P P Collisions At Square Root S

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language : en
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Release Date : 1994

The Diphoton Production Rate In Bar P P Collisions At Square Root S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with categories.

A measurement of the rate of prompt diphoton production in {bar p}p collisions at (square root)s = 1800 GeV using the CDF detector is presented. The background from non-prompt sources is estimated using a sample of single photon candidate events. The results are compared to a next-to-leading order calculation by Bailey, et al. Both background and signal take on particular significance as an indicator of our ability to estimate the backgrounds affecting LHC low mass Higgs to diphoton searches.

Soft And Hard Interactions In P Bar P Collisions At Square Root S

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language : en
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Release Date : 2000

Soft And Hard Interactions In P Bar P Collisions At Square Root S written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2000 with categories.

Proton-antiproton events collected with the CDF minimum-bias trigger at (square root)(s) = 1800 and 630 GeV are studied splitting the full event sample in a soft subsample of events with no energy clusters above 1.1 GeV and in the subsample of the remaining events. Detailed and precise analyses of the multiplicity and transverse momentum distributions as well as of the correlation of the average pt and of its dispersion with the multiplicity are performed for the two samples. Comparisons of the results and of their dependence from the center of mass energy show clear differences in their behaviors. The results support important and unexpected scaling properties of the soft sample.