Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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
Inclusive Pi^0, Eta, and Direct Photon Production at High Transverse Momentum in P+p and D+Au Collisions at Sqrt(s_NN)
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
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 Pi 0 Production in (197)Au + (197)Au Collisions at Sqrt S(NN)
Author: Publisher:
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Category :
Languages : en
Pages : 96
Book Description
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.
Measurement of [pi]0, [eta], and Direct Photon Production at High Transverse Momentum
![Measurement of [pi]0, [eta], and Direct Photon Production at High Transverse Momentum PDF](https://books.google.com/books/content/images/frontcover/A5SAtgAACAAJ?fife=w80-h100)
Author: Michael R. McLaughlinPublisher:
ISBN:
Category :
Languages : en
Pages : 360
Book Description
Inclusive [pi]0 and [eta]0 Production at Large Transverse Momentum in 300 GeV/c P-Be Collisions
![Inclusive [pi]0 and [eta]0 Production at Large Transverse Momentum in 300 GeV/c P-Be Collisions PDF](https://books.google.com/books/content/images/frontcover/gihZGwAACAAJ?fife=w80-h100)
Author: Stephen West DelchampsA measurement of direct photon production at large transverse momentum in ... [p], ... [p] and pp collisions at 300 GeV/c
![A measurement of direct photon production at large transverse momentum in ... [p], ... [p] and pp collisions at 300 GeV/c PDF](https://books.google.com/books/content/images/frontcover/69ZPNQEACAAJ?fife=w80-h100)
Author: A measurement of direct photon production at large transverse momentum in π_346p, π+p and pp collisions at 300 GeV, c
Author: Carlo De MarzoDirect Photon Production in Polarized Pp Collisions
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 9
Book Description
We argue that inclusive direct photon production at large transverse momentum in proton-proton interactions with longitudinally polarized beam and target is an incisive probe of the polarized gluon distribution in a proton. We provide predictions of cross sections of range of reasonable choices of the polarized gluon distribution. At current fixed target energies, the cross sections are small but measurable. At collider energies, such as the SSC energy, isolated direct photon production should be considered in order to minimize the nonperturbative contribution due to fragmentation. 9 refs., 3 figs.
A Study of High Transverse Momentum Direct Photon Production from Beryllium and Copper Targets with 530 GeV/c Incident [pi] ̄and Proton Beams
![A Study of High Transverse Momentum Direct Photon Production from Beryllium and Copper Targets with 530 GeV/c Incident [pi] ̄and Proton Beams PDF](https://books.google.com/books/content/images/frontcover/JKj1NwAACAAJ?fife=w80-h100)
Author: Eric Jon PrebysA measurement of direct photon production at large transverse momentum in p63E+p and pp collisions at 300GeV/c
Author: Max-Planck-Institut für Physik und Astrophysik MünchenPublisher:
ISBN:
Category :
Languages : de
Pages : 28
Book Description
Large Transverse Momentum Direct Photon, Pi O and N Production with a Carbon Target
Author: Stephen R. W. CooperPublisher:
ISBN:
Category : Particles (Nuclear physics)
Languages : en
Pages : 246
Book Description