Correlations Between High Transverse Momentum Hadrons In Greek Letter Pi P Kp And Pp Collisions At 200 Gev C
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Correlations Between High Transverse Momentum Hadrons In Greek Letter Pi P Kp And Pp Collisions At 200 Gev C
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Author : Robert Walter Stanek
language : en
Publisher:
Release Date : 1980
Correlations Between High Transverse Momentum Hadrons In Greek Letter Pi P Kp And Pp Collisions At 200 Gev C written by Robert Walter Stanek and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Hadrons categories.
Charged Particle Production At High Transverse Momentum In 200 Gev C Pp Greek Letter Pi P And Greek Letter Pi P Collisions
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Author : Michael Joseph Medinnis
language : en
Publisher:
Release Date : 1980
Charged Particle Production At High Transverse Momentum In 200 Gev C Pp Greek Letter Pi P And Greek Letter Pi P Collisions written by Michael Joseph Medinnis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Particles (Nuclear physics) categories.
J Psi Production At High Transverse Momenta In P P And Cu Cu Collisions At Sqrt Snn
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Author :
language : en
Publisher:
Release Date : 2009
J Psi Production At High Transverse Momenta In P P And Cu Cu Collisions At Sqrt Snn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009 with categories.
The STAR collaboration at RHIC presents measurements of J/[psi] → e+e− at mid-rapidity and high transverse momentum (p{sub T} > 5 GeV/c) in p+p and central Cu+Cu collisions at √sNN = 200 GeV. The inclusive J/[psi] production cross section for Cu+Cu collisions is found to be consistent at high p{sub T} with the binary collision-scaled cross section for p+p collisions, in contrast to previous measurements at lower p{sub T}, where a suppression of J/[psi] production is observed relative to the expectation from binary scaling. Azimuthal correlations of J/[psi] with charged hadrons in p+p collisions provide an estimate of the contribution of B-meson decays to J/[psi] production of 13% ± 5%.
Forward Di Hadron Asymmetries From P P At 8 S
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Author : James Lucas Drachenberg
language : en
Publisher:
Release Date : 2012
Forward Di Hadron Asymmetries From P P At 8 S written by James Lucas Drachenberg 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.
One unresolved question in hadronic physics is the origin of large transverse single-spin asymmetries, AN, observed in hadron production from high-energy polarized-proton collisions. Collinear perturbative Quantum Chromodynamics (pQCD) predicts that AN should scale with the quark mass, however, experiments have since reported large AN for inclusive hadron production. Recent measurements from RHIC experiments show examples of these asymmetries at forward angles in a kinematic region where pQCD cross-section calculations reasonably agree with measured cross-sections. Disentangling dynamical contributions to AN from hadro-production requires moving beyond inclusive measurements. One possibility is to investigate asymmetries in two-particle correlations due to Interference Fragmentation Functions (IFF) and the Sivers effect. In 2008, RHIC dedicated a portion of the run to transversely polarized proton collisions at sqrt(s) = 200 GeV. STAR was equipped with a Foward Meson Spectrometer (FMS) and a Forward Time Projection Chamber (FTPC), overlapping in the pseudorapidity range of 2.5 eta & lt; 4. By analyzing neutral pions with the FMS correlated with charged particles from the FTPC, correlation asymmetries can be measured at kinematics where large inclusive asymmetries have been measured. Correlations are measured for pi^0's with 2 & lt; pT, pi^0 & lt; 5 GeV/c and associated charged particles in two ranges of transverse momentum: 1 & lt; pT, ch & lt; 2 GeV/c and 0.5 & lt; pT, ch & lt; 1 GeV/c. IFF and Sivers asymmetries manifest themselves through the correlation of two particles from the same jet. These events are selected through a cut on the pair radius, delta R. Gain non-uniformities and electronics failures have resulted in large holes in trigger acceptance and associated particle acceptance, respectively. This non-uniform acceptance allows the Sivers and IFF effects to mix and distort the raw asymmetries. Techniques are developed to measure this leak-through by means of unpolarized yields and event weighting. They result in small corrections to the asymmetries. IFF and Sivers asymmetries both for xF 0 and for xF & lt; 0 are reported for forward-angle pi^0-charged particle correlations from polarized-proton collisions at sqrt(s) = 200 GeV. Asymmetries are shown corrected for full underlying-event and pileup backgrounds, as well as corrected only for pile-up contributions. It appears the asymmetries are less sensitive to delta R when corrected for the full underlying-event background. Unfortunately, statistics limitations preclude a firm conclusion.
Disappearance Of Back To Back High P Sub T Hadron Correlations In Central Au Au Collisions At Square Root S Sub Nn
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Author :
language : en
Publisher:
Release Date : 2002
Disappearance Of Back To Back High P Sub T Hadron Correlations In Central Au Au Collisions At Square Root S Sub Nn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with categories.
Azimuthal correlations for large transverse momentum charged hadrons have been measured over a wide pseudo-rapidity range and full azimuth in Au+Au and p+p collisions at = (square root)s{sub NN} = 200 GeV. The small-angle correlations observed in p+p collisions and at all centralities of Au+Au collisions are characteristic of hard-scattering processes already observed in elementary collisions. A strong back-to-back correlation exists for p+p and peripheral Au + Au. In contrast, the back-to-back correlations are reduced considerably in the most central Au+Au collisions, indicating substantial interaction as the hard-scattered partons or their fragmentation products traverse the medium.
A Measurement Of Pi 0 Production At Large Transverse Momentum In Pi P Pi P And Pp Collisions At 300 Gev C
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Author : Werner-Heisenberg-Institut für Physik, Max-Planck-Institut für Physik und Astrophysik, München
language : en
Publisher:
Release Date : 1986
A Measurement Of Pi 0 Production At Large Transverse Momentum In Pi P Pi P And Pp Collisions At 300 Gev C written by Werner-Heisenberg-Institut für Physik, Max-Planck-Institut für Physik und Astrophysik, München and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
A Measurement Of Pi Production At Large Transverse Momentum In P P And Pp Collisions At 300 Gev C
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Author :
language : en
Publisher:
Release Date : 1986
A Measurement Of Pi Production At Large Transverse Momentum In P P And Pp Collisions At 300 Gev C written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1986 with categories.
Phenix Results On Centrality Dependence Of Yields And Correlations In D Plus Au Collisions At Root S Nn
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Author :
language : en
Publisher:
Release Date : 2016
Phenix Results On Centrality Dependence Of Yields And Correlations In D Plus Au Collisions At Root S Nn written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016 with categories.
PHENIX has measured the transverse momentum (pT) spectra and two particle angular correlations for high pT particles in d+Au collisions at psNN=200 GeV using the RHIC Year-2008 run data. The azimuthal angle correlations for two particles with a large rapidity gap exhibit a ridge-like structure. Using the pi-0s reconstructed in the EMCal, we have successfully extended the pT reach of the correlation up to 8 GeV/c. We find that the azimuthal anisotropy of hadrons found at low pT persists up to 6 GeV/c with a significant centrality and pT dependence, similar to what was observed in A+A collisions.
Correlations In Transverse Momentum In Pi P And K P Collisions At 250 Gev Ca Superscript
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Author : Jan Czyzewski
language : en
Publisher:
Release Date : 1996
Correlations In Transverse Momentum In Pi P And K P Collisions At 250 Gev Ca Superscript written by Jan Czyzewski and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1996 with categories.
Particle Ratios At High Transverse Momentum In Pp Collisions At Sqrt S
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Author :
language : en
Publisher:
Release Date : 1983
Particle Ratios At High Transverse Momentum 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 1983 with categories.
The production of identified charged particles in pp collisions at .sqrt.s = 63 GeV with an identified high p/sub T/ trigger particle emitted in the central region is studied. The measurements were performed at the CERN ISR using the Axial Field Spectrometer. Trigger particle ratios, sigma(.pi./sup + -/)/ sigma(all/sup + -/), sigma(K/sup + -/) and sigma(p/sup + -/)/sigma(all/sup + -/) are presented for p/sub T/ from 5 GeV/c to 8 GeV/c. In addition sigma(.pi./sup + -/)/sigma(all/sup + -/) is presented in the p/sub T/ region from 2.5 GeV/c to 4.5 GeV/c. The charge compensation in the hemisphere containing the trigger particle is shown to depend strongly on the identity of the trigger particle and on the identity of the associated particles. 13 references.