Measurement Of The Underlying Event Activity Using Charged Particle Jets In Proton Proton Collisions At Sqrt S

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Study Of Double Parton Scattering Using Four Jet Scenarios

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Author : Paolo Gunnellini
language : en
Publisher: Springer
Release Date : 2015-08-24

Study Of Double Parton Scattering Using Four Jet Scenarios written by Paolo Gunnellini and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-08-24 with Science categories.

This thesis addresses in a very new and elegant way several measurements and the extraction of so-called double parton scattering. The new and elegant way lies in the combination of measurements and a very smart extraction of double parton scattering results, which is easy to apply and overcomes many of the technical difficulties of older methods. Many new phenomena in particle physics can be observed when particles are collided at the highest energies; one of the highlights in recent years was the discovery of the Higgs boson at the Large Hadron Collider at CERN. Understanding the production mechanism of the Higgs boson at the LHC requires detailed knowledge of the physics of proton-proton collisions. When the density of partons in the protons becomes large, there is a non-negligible probability that more than one parton participates in the interaction and the so-called double parton scattering becomes important. In some cases very particular final state signatures can be observed, which can be regarded as an indication of such double partonic scattering and where the different interactions can be separated. Such multiple partonic interactions play an important role when precise predictions from known processes are required.

Measurement Of The Underlying Event Activity Using Charged Particle Jets In Proton Proton Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2015

Measurement Of The Underlying Event Activity Using Charged Particle Jets 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 2015 with categories.

A measurement of the underlying event (UE) activity in proton-proton collisions is performed using events with charged-particle jets produced in the central pseudorapidity region).

Government Reports Announcements Index

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Author :
language : en
Publisher:
Release Date : 1985

Government Reports Announcements Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Science categories.

Government Reports Annual Index

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Author :
language : en
Publisher:
Release Date : 199?

Government Reports Annual Index written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 199? with categories.

A Measurement Of The Underlying Event Distributions In Proton Proton Collisions At Sqrt S

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Author : Joseph Salvatore Virzi
language : en
Publisher:
Release Date : 2012

A Measurement Of The Underlying Event Distributions In Proton Proton Collisions At Sqrt S written by Joseph Salvatore Virzi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with categories.

Underlying Event distributions are studied in events containing at least one charged particle jet produced in proton-proton collisions at sqrt(s) = 7 TeV. Jets are reconstructed from charged particles using the anti-Kt algorithm with radius parameter R = 0.6. The jet with the largest transverse momentum (pT) and.

Government Reports Annual Index Keyword A L

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Author :
language : en
Publisher:
Release Date : 1984

Government Reports Annual Index Keyword A L written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Government reports announcements & index categories.

Jet And Underlying Event Properties As A Function Of Charged Particle Multiplicity In Proton Proton Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2013

Jet And Underlying Event Properties As A Function Of Charged Particle Multiplicity 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 2013 with categories.

Characteristics of multi-particle production in proton-proton collisions at sqrt(s) = 7 TeV are studied as a function of the charged-particle multiplicity, N[ch]. The produced particles are separated into two classes: those belonging to jets and those belonging to the underlying event. Charged particles are measured with pseudorapidity abs(eta) 2.4 and transverse momentum pt 0.25 GeV. Jets are reconstructed from charged-particles only and required to have pt> 5 GeV. The distributions of jet pt, average pt of charged particles belonging to the underlying event or to jets, jet rates, and jet shapes are presented as functions of N[ch] and compared to the predictions of the PYTHIA and HERWIG event generators. Predictions without multi-parton interactions fail completely to describe the N[ch]-dependence observed in the data. For increasing N[ch], PYTHIA systematically predicts higher jet rates and harder pt spectra than seen in the data, whereas HERWIG shows the opposite trends. At the highest multiplicity, the data-model agreement is worse for most observables, indicating the need for further tuning and/or new model ingredients.

Measurement Of Neutral Strange Particle Production In The Underlying Event In Proton Proton Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2013

Measurement Of Neutral Strange Particle Production In The Underlying Event 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 2013 with categories.

Measurements are presented of the production of primary K(S)0 and Lambda particles in proton-proton collisions at sqrt(s) = 7 TeV in the region transverse to the leading charged-particle jet in each event. The average multiplicity and average scalar transverse momentum sum of K(S)0 and Lambda particles measured at pseudorapidities abs(eta)

Measurement Of Charged Particle Multiplicities In Gluon And Quark Jets In Proton Anti Proton Collisions At S

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Author :
language : en
Publisher:
Release Date : 2004

Measurement Of Charged Particle Multiplicities In Gluon And Quark Jets In Proton Anti Proton Collisions At 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 2004 with categories.

The authors report the first model independent measurement of charged particle multiplicities in quark and gluon jets, N{sub q} and N{sub g}, produced at the Tevatron in p{bar p} collisions with center-of-mass energy 1.8 TeV and recorded by the Collider Detector at Fermilab. The measurements are made for jets with average energies 41 and 53 GeV by counting charged particle tracks in cones with opening angle of?{sub c} = 0.28, 0.36, and 0.47 rad around the jet axis. The corresponding jet hardness Q = E{sub jet}?{sub c} varies in the range from 12 GeV to 25 GeV. At Q = 19 GeV, the ratio of multiplicities r = N{sub g}/N{sub q} is found to be 1.64 ± 0.17, where statistical and systematic uncertainties are added in quadrature. The results are in agreement with re-summed perturbative QCD calculations.

Production Of Leading Charged Particles And Leading Charged Particle Jets At Small Transverse Momenta In Pp Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2015

Production Of Leading Charged Particles And Leading Charged Particle Jets At Small Transverse Momenta In Pp 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 2015 with categories.

The per-event yield of the highest transverse momentum charged particle and charged-particle jet, integrated above a given pminT threshold starting at pminT=0.8 and 1 GeV, respectively, is studied in pp collisions at s√=8 TeV. Furthermore, the particles and the jets are measured in the pseudorapidity ranges.