Single-spin Transverse Asymmetry in Charged Hadron Production in s = 200 GeV p+p Collisions at PHENIX

Author(s):  
K. Okada
2019 ◽  
Vol 34 (13) ◽  
pp. 1950100 ◽  
Author(s):  
M. Ajaz ◽  
M. Tufail ◽  
Y. Ali

Differential yields of light flavored charged hadrons in [Formula: see text] collision at 0.9 TeV in the transverse momentum [Formula: see text] ranging from 0.1–2.5 GeV/c with pseudorapidity [Formula: see text] are presented here. The spectra obtained by Monte Carlo simulations with event generators — EPOS 1.99, EPOS-LHC, QGSJETII-04 and Sibyll2.3c — are compared with the ALICE measurements. For [Formula: see text] mesons, EPOS1.99, EPOS-LHC and QGSJETII-04 described the ALICE measurement very well almost in the entire [Formula: see text] range except QGSJETII-04 which underpredicts with [Formula: see text] below 0.4 GeV/c. The Sibyll2.3c model slightly overpredicts for [Formula: see text] GeV/c and underpredicts afterwards. For [Formula: see text] mesons, all models describe the experimental data qualitatively, except at high [Formula: see text], where the models slightly underpredict. The EPOS-LHC and QGSJETII-04 models, at low [Formula: see text], describe the distribution of the experimental measurements very well in both cases of protons and anti-protons, whereas the former underpredicts and the latter overpredicts at higher [Formula: see text]. The EPOS1.99 overpredicts at low [Formula: see text] below 1 GeV/c, whereas it reproduces the results well above it. Sibyll2.3c overpredicts the distribution over the entire range of [Formula: see text]. Models described the average transverse momentum [Formula: see text] of these hadron species as a function of their mass, showing small rise in the average [Formula: see text] with the mass of the particles. The same has been observed by the STAR collaboration with measurements in [Formula: see text] reactions at [Formula: see text] = 200 GeV and also in [Formula: see text] collisions at [Formula: see text] = 900 GeV.


1999 ◽  
Vol 14 (02) ◽  
pp. 195-203
Author(s):  
E. A. ANDREEVA ◽  
V. A. OKOROKOV ◽  
M. N. STRIKHANOV ◽  
S. B. NURUSHEV

Recently several scaling hypotheses were advocated for application to the single spin asymmetry in inclusive hadron production at high energy. We briefly review those hypotheses and confront them with published experimental data. We conclude that the existing data do not allow to make a firm conclusion on any of scaling laws proposed and more precise data with a wide kinematical coverage are required to establish or refute those hypotheses.


1984 ◽  
Vol 52 (8) ◽  
pp. 577-580 ◽  
Author(s):  
H. Aihara ◽  
M. Alston-Garnjost ◽  
D. H. Badke ◽  
J. A. Bakken ◽  
A. Barbaro-Galtieri ◽  
...  

2004 ◽  
Vol 67 (7) ◽  
pp. 1321-1329
Author(s):  
Yu. V. Kharlov ◽  
D. A. Morozov ◽  
S. B. Nurushev ◽  
A. N. Vasiliev

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