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Showing 1 to 20 of 36 for “"Relativistic heavy ion collider (RHIC)"”.
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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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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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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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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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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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Suppression of High Transverse Momentum Charged Hadrons in Au+Au Collisions at 200 GeV Nucleon-Nucleon Center of Mass Energy
… properties of quark gluon plasma are studied in heavy ion collisions. Gold ions are accelerated with the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory and collided at energies up to 200 GeV per nucleon. Collision products and their properties are detected and measured …
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Transverse spin asymmetries in neutral strange particle production
… spin of quarks contributes only a small fraction of the total proton spin sparked a huge theoretical and experimental effort to understand the origin of the remainder. In particular the transverse spin properties of the proton remain poorly understood. Significant transverse spin asymmetries …
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Properties of Fragmentation Photons in p+p Collisions at 200 GeV Center-of-Mass Energy
The strong modification to the production of final state hadrons in heavy ion collisions is a key signature of the hot dense medium produced at energies achieved at the Relativistic Heavy Ion Collider (RHIC). Understanding the mechanisms for the parton energy loss responsible for these …
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Energy and centrality dependence of mid-rapidity charged particle multiplicity in relativistic heavy-ion collisions
… (QCD), the modern theory of the strong interaction, can be investigated through the study of relativistic nucleus-nucleus collisions. Recently, the Relativistic Heavy-Ion Collider (RHIC) was completed and started taking data at ten times higher center-of-mass energies than the previous most …
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Angular Correlation of Emitted Neutrons Due to Giant Dipole Resonance in Ultra Peripheral Collisions
In an ultra peripheral collision with two gold ions, two virtual photons are exchanged, which excites the nuclei into a mutual giant dipole resonance (GDR) state. This excited state decays most often via neutron emission. The two emitted neutrons have an expected angular correlation based on the …
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Clustering phenomena from two-particle angular correlations in proton-proton and heavy ion collisions
Results on two-particle angular correlations in proton-proton (/-s = 200 and 410 GeV) ,Cu+Cu and Au+Au collisions (js = 200 GeV) are presented over a broad range of pseudorapidity ([eta]) and azimuthal angle ([phi]). The PHOBOS experiment at the Relativistic Heavy Ion Collider (RHIC) has a uniquely …
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Charged hadron transverse momentum spectra in Au+Au and d+Au collisions at 200 GeV per nucleon pair
The Relativistic Heavy Ion Collider (RHIC) collides Au ions at a center of mass energy of 200 GeV per nucleon pair, which produces the most energetic collisions yet seen in the laboratory. RHIC has also collided proton beams and deuteron+gold beams. By studying these collisions important …
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Elliptic flow in Au+Au collisions at 200 GeV per nucleon pair
The Relativistic Heavy Ion Collider (RHIC) has provided its experiments with the most energetic nucleus-nucleus collisions ever achieved in a laboratory. These collisions allow for the study of the properties of nuclear matter at very high temperature and energy density, and may uncover new forms …
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