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Showing 1 to 20 of 47 for “"Relativistic heavy ion collider"”.
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Dihadron Fragmentation Functions In Proton-Proton Collisions At The Relativistic Heavy Ion Collider (rhic)
<p>Measurements of azimuthal correlations at the Relativistic Heavy Ion Collider (RHIC) have shown an away-side that is suppressed in Au+Au collisions compared to proton+proton/Deuteron+proton collisions. Such suppression is taken as a signature of the predicted QCD dense medium. However, the …
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Measurement of Polarized Proton-Proton Elastic Scattering at the Relativistic Heavy Ion Collider (RHIC)
… difficult to describe. There are two interactions involved in this process: electromagnetic (Coulomb) and hadronic (strong) interactions. Underlying exchange mechanisms of these two interactions are the virtual photon and the <em>Pomeron</em> exchange, respectively. The difficulty of elastic …
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Antiparticle to particle ratios in gold+gold and copper+copper collisions at the Relativistic Heavy Ion Collider.
… ratios in gold+gold and copper+copper collisions at the Relativistic Heavy Ion Collider.
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A study of jets at the STAR experiment at the relativistic heavy ion collider via two-particle correlations
Jets have been studied in high energy heavy ion collisions by measuring the angular correlation between particles at high transverse momentum. Differences in the yield and shape of the angular correlations as a function of system size give information on the medium produced in the collision. Such …
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A study of medium induced jet modificaiton at the relativistic heavy ion collider via two particle correlations and identified jet spectra
This work has studied the particle composition of jets by determining the ratios p±/π± and K±/π± in Au + Au and d + Au collisions at √sNN = 200 GeV measured by the STAR experiment at RHIC. Jets were found by measuring the angular azimuthal correlation between particles at high transverse momentum. …
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Development of a polarized Helium-3 ion source for RHIC using the electron beam ion source
… development of a source of polarized Helium-3 ions for the Relativistic Heavy Ion Collider at Brookhaven National Lab, Upton, NY. The 3He atoms will be polarized using the technique of metastability exchange optical pumping (MEOP), and will then be flowed into the newly commissioned Electron …
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Studying the Quark Structure of the Proton in High Energy Proton-Proton Collisions at RHIC
… spin asymmetries from inclusive di-hadron production in polarized proton-proton collisions at Relativistic Heavy Ion Collider. This measurement combines the transversity distribution function and a polarized di-hadron fragmentation function, therefore can be included in the global analysis as an …
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Centrality dependence of two-particle number and transverse momentum correlations in 200 gev au+au collisions at rhic
… present plots of the pattern of particle formation in $sqrt{s_{NN}}=200$ GeV Au+Au heavy ion collisions at the Relativistic Heavy Ion Collider (RHIC) using three different two-particle correlation measurements of number and transverse momentum as a function of relative azimuth, pseudorapidity …
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Two Particle Correlations And The Ridge In Relativistic Heavy Ion Collisions
<p>Measurements at the Relativistic Heavy Ion Collider (RHIC) find an enhancement of two particle correlations in relativistic heavy ion collisions, not present in proton-proton collisions. Because the correlation structure is wide in relative pseudorapidity and narrow in relative azimuthal angle, …
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J / ( ) production in heavy ion collisions at the STAR detector at RHIC
… results has been supported by the prediction and subsequent discovery of the charm, bottom, and top quarks, and the Z, W±, and Higgs bosons. The theory of Quantum Chromodynamics (QCD), which describes the strong interaction between quarks and gluons in the Standard Model, predicts a phase …
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Centrality Effects on Heavy-Flavor Quark Production and Invariant Yield in PHENIX Proton–Gold Collisions at Center-of-Mass Energy 200 GeV, and Assembly, Testing, Calibration, and Installation of the sPHENIX Hadronic Calorimeters
<p>Hadrons created in heavy-ion collisions interact with the open color-charge of the quark-gluon plasma through their constituent quarks. The medium imparts substantial modifications to heavy-flavor hadrons' momentum spectra. For collisions of small systems, the centrality of those collisions …
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Feasibility study on extracting the gluon polarization in Di-Jet production in polarized pp collisions at RHIC
The STAR experiment at the Relativistic Heavy-Ion Collider (RHIC) at Brookhaven National Laboratory (BNL) is carrying out a spin physics program at is = 200 - 500 GeV to gain a deeper insight into the spin structure and dynamics of the proton. These studies provide fundamental tests of Quantum …
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Control study of two-particle correlations in heavy ion collisions at RHIC-PHENIX
Measurements at the Relativistic Heavy Ion Collider (RHIC) have provided indirect measurements of jets in a heavy ion environment using the two- particle correlation method in the presence of a high-pT particle. These measurements have offered insight into the formation of a new state of dense …
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Measurement of transverse single-spin asymmetries in π0 and η Meson production in √s = 200 GEV p↑ + p collisions with sPHENIX
The sPHENIX experiment is a next-generation collider detector at the Relativistic Heavy Ion Collider (RHIC) designed for rare jet and heavy-flavor probes of Au + Au, p + Au, and polarized p + p collisions. The experiment includes a large acceptance, granular electromagnetic calorimeter and very …
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D meson reconstruction at star using the silicon vertex tracker (svt)
<p>At the Relativistic Heavy Ion Collider a hot and dense matter is produced in Au+Au collisions at sqrt(sNN) = 200 GeV/c. This matter exhibits features of a new deconfined partonic matter, called the Quark-Gluon Plasma. Charm quarks are expected to be produced predominately from the initial gluon …
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Electron positron pair production in ultraperipheral Au+Au collisions at RHIC
… thesis presents a measurement of the cross section for coherent production of electron-positron pairs in ultraperipheral collisions of gold ions with a center-of-mass energy of 200 GeV per nucleon. The collisions were observed in runs 10 and 11 at the Relativistic Heavy Ion Collider (RHIC), …
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pQCD energy loss and thermal field theory in small systems
In recent years, experiments at the Large Hadron Collider and the Relativistic Heavy Ion Collider have discovered that many of the signatures that are traditionally ascribed to the presence of a quark-gluon plasma (QGP) in central heavy-ion collisions also manifest in certain classes of peripheral …
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Identified particle transverse momentum distributions from AU + AU collisions at 62.4 GeV per nucleon pair
Transverse momentum (PT) distributions for pions, kaons, protons and antiprotons have been measured near mid-rapidity for Au+Au collisions at sNN = 62.4 GeV using the PHOBOS detector at the Relativistic Heavy-Ion Collider (RHIC) in Brookhaven National Laboratory. Particle identification is …
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Studies of nucleon-gold collisions at 200 GeV per nucleon pair using tagged d+Au interactions
… near mid-rapidity in d+Au, p+Au and n+Au collisions at - = 200 GeV are presented as a function of transverse momentum and centrality. These measurements were performed using the PHOBOS detector at the Relativistic Heavy Ion Collider (RHIC). Nucleon-nucleus interactions were extracted from the …
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Dijet production in polarized proton-proton collisions at [the square root of sigma] = 200 GeV
… which led to interest in measuring the contributions of other components. Through polarized proton-proton collisions at the Relativistic Heavy Ion Collider (RHIC), the world's only polarized proton collider, it is possible to make an extraction of the polarized gluon distribution function …
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