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Charged Particle Transverse Momentum Spectra In Pp Collisions At Sqrt S

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Charged Particle Transverse Momentum Spectra In Pp Collisions At Sqrt S

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Author :
language : en
Publisher:
Release Date : 2011

Charged Particle Transverse Momentum Spectra 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 2011 with categories.

The charged particle transverse momentum (pT) spectra are presented for pp collisions at sqrt(s)=0.9 and 7 TeV. The data samples were collected with the CMS detector at the LHC and correspond to integrated luminosities of 231 inverse microbarns and 2.96 inverse picobarns, respectively. Calorimeter-based high-transverse-energy triggers are employed to enhance the statistical reach of the high-pT measurements. The results are compared with both leading-order QCD and with an empirical scaling of measurements at different collision energies using the scaling variable xT = 2 pT/sqrt(s) over the pT range up to 200 GeV/c. Using a combination of xT scaling and direct interpolation at fixed pT, a reference transverse momentum spectrum at sqrt(s)=2.76 TeV is constructed, which can be used for studying high-pT particle suppression in the dense QCD medium produced in heavy-ion collisions at that centre-of-mass energy.

C Ad Experiments 2000 2004

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Author : P. Lo Presti
language : en
Publisher:
Release Date : 2004

C Ad Experiments 2000 2004 written by P. Lo Presti and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Colliders (Nuclear physics) categories.

Search For New Heavy Charged Bosons And Measurement Of High Mass Drell Yan Production In Proton Proton Collisions

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Author : Markus Zinser
language : en
Publisher: Springer
Release Date : 2018-09-25

Search For New Heavy Charged Bosons And Measurement Of High Mass Drell Yan Production In Proton Proton Collisions written by Markus Zinser and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-09-25 with Science categories.

This book presents two analyses, the first of which involves the search for a new heavy charged gauge boson, a so-called W' boson. This new gauge boson is predicted by some theories extending the Standard Model gauge group to solve some of its conceptual problems. Decays of the W' boson in final states with a lepton (l± = e± , μ±) and the corresponding (anti-)neutrino are considered. Data collected by the ATLAS experiment in 2015 at a center of mass energy of √s =13 TeV is used for the analysis. In turn, the second analysis presents a measurement of the double-differential cross section of the process pp->Z/gamma^* + X -> l^+l^- + X, including a gamma gamma induced contribution, at a center of mass energy of sqrt{s} = 8 TeV. The measurement is performed in an invariant mass region of 116 GeV to 1500 GeV as a function of invariant mass and absolute rapidity of the l^+l^-- pair, and as a function of invariant mass and pseudorapidity separation of the l^+l^-- pair. The data analyzed was recorded by the ATLAS experiment in 2012 and corresponds to an integrated luminosity of 20.3/fb. It is expected that the measured cross sections are sensitive to the PDFs at very high values of the Bjorken-x scaling variable, and to the photon structure of the proton.

Measurements Of Charged Particle Transverse Momentum Spectra In Pbpb Collisions At Square Root Of Nn

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Author : Eric Appelt
language : en
Publisher:
Release Date : 2014

Measurements Of Charged Particle Transverse Momentum Spectra In Pbpb Collisions At Square Root Of Nn written by Eric Appelt and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014 with Collisions (Nuclear physics) categories.

Nuclear Science Abstracts

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Author :
language : en
Publisher:
Release Date : 1973-11

Nuclear Science Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1973-11 with Nuclear energy categories.

Study Of High Transverse Momentum Charged Particle Suppression In Heavy Ion Collisions At Lhc

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Author : Andre Sungho Yoon
language : en
Publisher:
Release Date : 2012

Study Of High Transverse Momentum Charged Particle Suppression In Heavy Ion Collisions At Lhc written by Andre Sungho Yoon 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.

The charged particle spectrum at large transverse momentum (PT), dominated by hadrons originating from parton fragmentation, is an important observable for studying the properties of the hot, dense medium produced in high-energy heavy-ion collisions. The study of the modifications of the PT spectrum in PbPb compared to pp collisions at the same collision energy can shed light on the detailed mechanism by which hard partons lose energy traversing the medium. In this thesis, the transverse momentum spectra of charged particles in pp and PbPb collisions at [square root of]Snn = 2.76 TeV measured up to PT = 100 GeV/c with the CMS experiment at the Large Hadron Collider (LHC) are presented. In the transverse momentum range PT = 5-10 GeV/c, the charged particle yield in the most central PbPb collisions is suppressed by up to a factor of 7 compared to the pp yield scaled by the number of incoherent nucleon-nucleon collisions. At higher PT, this suppression is significantly reduced, approaching roughly a factor of 2 for particles with PT in the range PT = 40-100 GeV/c. A simple modeling of the parton energy loss applied to the PYTHIA Monte-Carlo (MC) reveals that the charged particle spectrum with the pQCD-motivated fractional parton energy loss can describes the shape of the measured suppression well in the range PT = 5-100 GeV/c.