Download or read book Study of Jet Transverse Momentum and Jet Rapidity Dependence on Dijet Azimuthal Decorrelations written by and published by . This book was released on 2012 with total page 109 pages. Available in PDF, EPUB and Kindle. Book excerpt: In a collision experiment involving highly energetic particles such as hadrons, processes at high momentum transfers can provide information useful for many studies involving Quantum Chromodynamics (QCD). One way of analyzing these interactions is through angular distributions. In hadron-hadron collisions, the angular distribution between the two leading jets with the largest transverse momentum (pT) is affected by the production of additional jets. While soft radiation causes small differences in the azimuthal angular distribution of the two leading jets produced in a collision event, additional hard jets produced in the event have more pronounced influence on the distribution of the two leading jets produced in the collision. Thus, the dijet azimuthal angular distribution can serve as a variable that can be used to study the transition from soft to hard QCD processes in a collision event. This dissertation presents a triple-differential study involving the azimuthal angular distribution and the jet transverse momenta, and jet rapidities of the first two leading jets. The data used for this research are obtained from proton-antiproton (p$\bar{p}$) collisions occurring at a center of mass energy of 1.96TeV, using the DØ detector in Run II of the Tevatron Collider at the Fermi National Accelerator Laboratory (FNAL) in Illinois, USA. Comparisons are made to perturbative QCD (pQCD) predictions at next-to-leading order (NLO).
Download or read book Study of transverse Momentum Dependence of Dijet Azimuthal Decorrelations in Proton proton Collisions at center of mass Energy written by Ramasudhakar Dhullipudi and published by . This book was released on 2012 with total page 402 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Measurement of the Azimuthal Decorrelation in Di Jet Events in Proton Proton Collisions at the Center of Mass Energy written by Gabriel Rosenbaum and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Studying Transverse Momentum Dependent Distributions in Polarized Proton Collisions Via Azimuthal Single Spin Asymmetries of Charged Pions in Jets written by James Kevin Adkins and published by . This book was released on 2017 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Dijet Azimuthal Decorrelations in Pp Collisions at Sqrt s written by and published by . This book was released on 2011 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: Measurements of dijet azimuthal decorrelations in pp collisions at sqrt(s) = 7 TeV using the CMS detector at the CERN LHC are presented. The analysis is based on an inclusive dijet event sample corresponding to an integrated luminosity of 2.9 inverse picobarns. The results are compared to predictions from perturbative QCD calculations and various Monte Carlo event generators. The dijet azimuthal distributions are found to be sensitive to initial-state gluon radiation.
Download or read book Multiparticle Azimuthal Correlation Measurements in Lead lead and Proton lead Collisions at LHC with the CMS Detector written by Shengquan Tuo and published by . This book was released on 2015 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Measurement of Transverse Momentum Relative to Dijet Systems in PbPb and pp Collisions at sqrt s NN written by and published by . This book was released on 2015 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: An analysis of dijet events in PbPb and pp collisions is performed to explore the properties of energy loss by partons traveling in a quark-gluon plasma. Data are collected at a nucleon-nucleon center-of-mass energy of 2.76 TeV at the LHC. The distribution of transverse momentum (pT) surrounding dijet systems is measured by selecting charged particles in different ranges of pT and at different angular cones of pseudorapidity and azimuth. The measurement is performed as a function of centrality of the PbPb collisions, the pT asymmetry of the jets in the dijet pair, and the distance parameter R used in the anti-kT jet clustering algorithm. In events with unbalanced dijets, PbPb collisions show an enhanced multiplicity in the hemisphere of the subleading jet, with the pT imbalance compensated by an excess of low-pT particles at large angles from the jet axes.
Download or read book Energy Dependence of Transverse Momentum Fluctuations in Pb Pb Collisions at the CERN Super Proton Synchrotron SPS at 20A to 158A GeV written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Results are presented on event-by-event fluctuations of transverse momenta p{sub T} in central Pb+Pb interactions at 20A, 30A, 40A, 80A, and 158A GeV. The analysis was performed for charged particles at forward center-of-mass rapidity (1.1
Download or read book Measurement of the Transverse Single Spin Asymmetry and the Invariant Cross Section of Inclusive Eta Mesons Produced from Transversely Polarized Proton Proton Collisions at Center of Mass Energy of 200 GeV written by David William Kleinjan and published by . This book was released on 2014 with total page 161 pages. Available in PDF, EPUB and Kindle. Book excerpt: The measurement of transverse single spin asymmetries provides insight into the structure of the nucleon. Originally expected to be small, results from PHENIX and other experiments show significant asymmetries in the forward momentum direction of the polarized proton over a wide range of center-of-mass energies. Several mechanisms have been proposed that attempt to explain these asymmetries, which include initial and final state effects based on transverse momentum dependent distributions and perturbative Quantum Chromodynamic (pQCD) calculations at higher twist. Studying the species, and the kinematic dependencies of these transverse single spin asymmetries will help to disentangle the origin of the observed asymmetries. Using the PHENIX detector at the Relativistic Heavy Ion Collider (RHIC), the transverse single spin asymmetry (A N ) of inclusive eta mesons produced from transversely polarized proton-proton collisions at center of mass energy of 200 GeV at forward rapidity is measured. In addition, the predictive power of pQCD to explain this asymmetry is tested via the measurement of the eta meson Cross Section.
Download or read book Transverse Momentum Evolution of Hardon V0 Correlations in PP Collisions at square Root S written by Sandun Yasassri Jayarathna Pahula Hewage and published by . This book was released on 2015 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) in Geneva, Switzerland, is capable of accelerating beams of protons (pp) and heavy-ions (Pb+Pb) up to nearly the speed of light, which corresponds to center of mass energies of 7 TeV and 2.76 TeV, respectively. The goal of the pp program is to investigate physics of and beyond the standard model, while the heavy-ion program attempts to characterize the properties of a new state of matter, called the Quark Gluon Plasma. The main aim of this dissertation is to identify particle production mechanisms in pp collisions, also as a reference for possible modifications due to the plasma formation in heavy-ion collisions. Two-particle azimuthal correlation measurements were employed, which allow the study of high-pT parton fragmentation without full jet reconstruction. We present the results of correlations between charged trigger particles and associated strange baryons and mesons. Enhancements of the azimuthal correlations are seen at dphi= 0 and dphi= pi, resulting from back-to-back jet fragmentation in the parton center-of-mass system. Two model fit functions were introduced to characterize the properties of the jet peaks. Hard and soft yields were seperated using the ZYAM method and extracted yields were compared with pQCD inspired models and inclusive spectra. The analysis was performed in different multiplicity bins to detect possible enhancements of baryons or meson yields and the baryon/meson ratio. The latter was observed in high multiplicity Pb+Pb collisions and interpreted as a novel production mechanism in the deconfined medium produced at the LHC. A novel data-driven feeddown correction for Lambda is also introduced, which could allow a more accurate calculation of the primary Xi.
Download or read book The Dijet Cross Section Measurement in Proton proton Collisions at a Center of Mass Energy of 500 GeV at STAR written by Grant D. Webb and published by . This book was released on 2014 with total page 135 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Momentum Loss in Proton nucleus and Nucleus nucleus Collisions written by Ferdous Khan and published by . This book was released on 1993 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Long Range Near Side Angular Correlations in Proton Proton Interactions in CMS written by and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The CMS Collaboration Results on two-particle angular correlations for charged particles emitted in proton-proton collisions at center of mass energies of 0.9, 2.36 and 7TeV over a broad range of pseudorapidity and azimuthal angle (f) are presented using data collected with the CMS detector at the LHC. Short-range correlations in??, which are studied in minimum bias events, are characterized using a simple independent cluster parameterization in order to quantify their strength (cluster size) and their extent in? (cluster decay width). Long-range azimuthal correlations are studied more differentially as a function of charged particle multiplicity and particle transverse momentum using a 980nb-1 data set at 7TeV. In high multiplicity events, a pronounced structure emerges in the two-dimensional correlation function for particles in intermediate pT's of 1-3GeV/c, 2.0>
Download or read book Azimuthal Anisotropy in Gold gold Collisions at 4 5 GeV Center of mass Energy Per Nucleon Pair Using Fixed target Mode at the Relativistic Heavy Ion Collider written by Yang Wu and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Dependence of the Average Transverse Momentum of Pions Produced in Proton Proton Collisions written by Arne Liland and published by . This book was released on 1980 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Azimuthal Anisotropy of Different Quark flavored Particles in High Energy simulated Proton Proton Collisions written by Mahmoud Rateb and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: Anisotropic flow in high energy heavy-ion collisions is taken as a key evidence for the formation of QGP for brief seconds right after the collisions. Hydrodynamic models including QGP formation are accurate at predicting the azimuthal anisotropy of the produced particles at low transverse momenta. At high momenta however, hydrodynamic models predict no azimuthal anisotropy for particles of different masses and quark-flavors; the logic being that because of their high momenta, the particles pass through the media without having any time to have any reactivity. This is contrary to results from experiments where measurements of particles of different quark flavors show non-zero elliptic flow. To study this deviation, we run PYTHIA simulation of proton-proton collisions at center- of-mass energies equivalent to those at RHIC and LHC; 200 GeV and 13 TeV. Since in PYTHIA simulations no QGP if formed, and there is no final-state interaction, results in our simulation would act as probes to be compared to the results of elliptic flow from real experiments. Our results showed non-zero results for the elliptic flow of pions, heavy mesons and direct photons. Those results are evident of the possible bias in the way the reaction plane is calculated, since all the other factors are controlled for in the PYTHIA simulations. To make up for this inherent bias, the results from PYTHIA should be subtracted from the results of elliptic flow in real experiments, to end up with unbiased results for elliptic flow from the different colliders.
Download or read book A Study of High Transverse Momentum Electrons Produced in High Energy Proton antiproton Collisions written by David Robinson and published by . This book was released on 1988 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
