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Photon And Neutral Pi 0 Production In 197 Au 197 Au Collisions At Sqrt S Nn


Photon And Neutral Pi 0 Production In 197 Au 197 Au Collisions At Sqrt S Nn
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Photon And Pi 0 Production In 197au 197au Collisions At Square Root Snn


Photon And Pi 0 Production In 197au 197au Collisions At Square Root Snn
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Author : Ian Jeffrey Johnson
language : en
Publisher:
Release Date : 2002

Photon And Pi 0 Production In 197au 197au Collisions At Square Root Snn written by Ian Jeffrey Johnson 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.




Photon And Neutral Pi 0 Production In 197 Au 197 Au Collisions At Sqrt S Nn


Photon And Neutral Pi 0 Production In 197 Au 197 Au Collisions At Sqrt S Nn
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Author :
language : en
Publisher:
Release Date : 2002

Photon And Neutral Pi 0 Production In 197 Au 197 Au Collisions At Sqrt 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 2002 with categories.


Inclusive transverse momentum spectra of photons and [pi]°s at mid-rapidity are studied as a function of collision centrality for 197Au+ 197Au collisions at √s{sub NN} = 130 GeV. Photon pair conversions have been reconstructed from charged tracks measured by the main Time Project Chamber of the STAR experiment at the RHIC heavy ion facility. The transverse momentum resolution of photons with this method is estimated to be [Delta]p{sub t}/p{sub t} = 2% at 0.125 GeV/c and 5% at 2.5 GeV/c. Photon spectra were measured up to a transverse momentum of 2.4 GeV/c between ± 0.5 units of rapidity. The dominant photon production mechanism, the [pi]° → [gamma][gamma] decay, was measured between 0.25-2.5 GeV/c and ± 1 units of rapidity. Spectra are reported for the top 11%, 11-34% and 34-85% centrality classes. It was observed that in mid-central and central collisions the relative contribution of the [pi]° → [gamma][gamma] decay to the inclusive photon spectrum decreases above a transverse momentum of 1.65 GeV/c. In central collisions the magnitude of the decrease from p{sub t} = 1.65 GeV/c to 2.4 GeV/c is 20%. It is unlikely that contributions from other [pi]° decay channels and other particle decays fully explain this decrease. The centrality dependence on the shapes of the [pi]° spectra was analyzed with Boltmann and Bose-Einstein functions. In the transverse momentum windows of the spectra, the extracted temperatures are near 0.295 GeV. These temperatures are substantially higher than those extracted from [pi]{sup {+-}} spectra in a lower range of transverse momentum. This is an indication that the shapes of the pion spectra deviate from purely exponential shapes.



Photon And Pi 0 Production In 197au 197au Collisions At Square Root Nn


Photon And Pi 0 Production In 197au 197au Collisions At Square Root Nn
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Author : Ian Jeffrey Johnson
language : en
Publisher:
Release Date : 2002

Photon And Pi 0 Production In 197au 197au Collisions At Square Root Nn written by Ian Jeffrey Johnson 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.




Photon And Neutral 0 Sup Production In Sup197au Sup197 Supau Collisions At U221a Ssubnn


Photon And Neutral 0 Sup Production In Sup197au Sup197 Supau Collisions At U221a Ssubnn
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Author :
language : en
Publisher:
Release Date : 2002

Photon And Neutral 0 Sup Production In Sup197au Sup197 Supau Collisions At U221a Ssubnn 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.


Inclusive transverse momentum spectra of photons and ?0s at mid-rapidity are studied as a function of collision centrality for 197Au+ 197Au collisions at √sNN = 130 GeV. Photon pair conversions have been reconstructed from charged tracks measured by the main Time Project Chamber of the STAR experiment at the RHIC heavy ion facility. The transverse momentum resolution of photons with this method is estimated to be ?pt/pt = 2% at 0.125 GeV/c and 5% at 2.5 GeV/c. Photon spectra were measured up to a transverse momentum of 2.4 GeV/c between ± 0.5 units of rapidity. The dominant photon production mechanism, the ?0 → ?? decay, was measured between 0.25-2.5 GeV/c and ± 1 units of rapidity. Spectra are reported for the top 11%, 11-34% and 34-85% centrality classes. It was observed that in mid-central and central collisions the relative contribution of the ?0 → ?? decay to the inclusive photon spectrum decreases above a transverse momentum of 1.65 GeV/c. In central collisions the magnitude of the decrease from pt = 1.65 GeV/c to 2.4 GeV/c is 20%. It is unlikely that contributions from other ?0 decay channels and other particle decays fully explain this decrease. The centrality dependence on the shapes of the ?0 spectra was analyzed with Boltmann and Bose-Einstein functions. In the transverse momentum windows of the spectra, the extracted temperatures are near 0.295 GeV. These temperatures are substantially higher than those extracted from ?± spectra in a lower range of transverse momentum. This is an indication that the shapes of the pion spectra deviate from purely exponential shapes.



Inclusive Pi 0 Eta And Direct Photon Production At High Transverse Momentum In P P And D Au Collisions At Sqrt S Nn


Inclusive Pi 0 Eta And Direct Photon Production At High Transverse Momentum In P P And D Au Collisions At Sqrt S Nn
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Author :
language : en
Publisher:
Release Date : 2010

Inclusive Pi 0 Eta And Direct Photon Production At High Transverse Momentum In P P And D Au Collisions At Sqrt 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 2010 with categories.


We report a measurement of high-p{sub T} inclusive [pi]°, [eta], and direct photon production in p + p and d + Au collisions at √s{sub NN} = 200 GeV at midrapidity (0



Photon And Neutral Pion Production In Au Au Collisions At Radical S Sub Nn


Photon And Neutral Pion Production In Au Au Collisions At Radical S Sub Nn
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Author :
language : en
Publisher:
Release Date : 2004

Photon And Neutral Pion Production In Au Au Collisions At Radical 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 2004 with categories.


We report the first inclusive photon measurements about mid-rapidity (



Photon And Neutral Pion Production In D Au Collisions At Rhic


Photon And Neutral Pion Production In D Au Collisions At Rhic
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Author : Jean-Franc̦ois Paquet
language : en
Publisher:
Release Date : 2010

Photon And Neutral Pion Production In D Au Collisions At Rhic written by Jean-Franc̦ois Paquet and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with categories.




Transverse Expansion In Sup 197 Au Sup 197 Au Collisions At Rhic


Transverse Expansion In Sup 197 Au Sup 197 Au Collisions At Rhic
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Author :
language : en
Publisher:
Release Date : 2003

Transverse Expansion In Sup 197 Au Sup 197 Au Collisions At Rhic written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003 with categories.


Using the RQMD model, transverse momentum distributions and particle ratios are studied for 197Au + 197Au collisions at (square root)s{sub NN} = 200 GeV. In particular, they present results on the mean transverse momentum of charged pions, charged kaons, protons and anti-protons and compare with experimental measurements. They discuss an approach to study early partonic collectivity in high energy nuclear collisions.



0 Mesons Pi 0 Mesons And Photons Measured In Au Au Collisions At An Energy Of Snn


 0 Mesons Pi 0 Mesons And Photons Measured In Au Au Collisions At An Energy Of Snn
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Author : Alexander Albert Wetzler
language : en
Publisher:
Release Date : 2006

0 Mesons Pi 0 Mesons And Photons Measured In Au Au Collisions At An Energy Of Snn written by Alexander Albert Wetzler and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with categories.




Production Of Direct Photons And Neutral Pions In Relativistic Au Au Collisions


Production Of Direct Photons And Neutral Pions In Relativistic Au Au Collisions
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Author : Tadaaki Isobe
language : en
Publisher:
Release Date : 2007

Production Of Direct Photons And Neutral Pions In Relativistic Au Au Collisions written by Tadaaki Isobe and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Heavy ion collisions categories.