High-transverse-momentum single-hadron production inppandpdcollisions ats=

Abstract

Results of high-transverse-momentum charged-hadron production in 400-GeV/c proton-proton and proton-deuteron collisions and 800-GeV/c proton-proton collisions are presented. The transverse-momentum range of the data is from 5.2 to 9.0 GeV/c for the 400-GeV/c collisions and from 3.6 to 11.0 GeV/c for the 800-GeV/c collisions; the data are centered around 90" in the proton-nucleon center-of-momentum system. Single-pion invariant cross sections and particle ratios were measured at both energies. The results are compared to previous experiments and the Lund model. 2777

High-pTpion and kaon production in relativistic nuclear collisions

“…To test the validity of the above approach, we calculated π 0 , π + and π − production in pp collisions in the energy range 20 GeV √ s 60 GeV, and compared the results to data from several independent experiments [7][8][9][10][11][12]. The calculations were performed using the finite rapidity windows of the data.…”

“…At each measured transverse momentum value (p T ≥ 2 GeV) we determined the width of the transverse-momentum distribution, k (3) to fit the measured value of the spectrum at the given value of pT , point by point, for π + (top panels) and π − (bottom panels) production in pp collisions at several energies. The data are from Ref.s [7,[10][11][12].…”

“…Data are from a range of independent experiments [7][8][9][10][11][12]. T in pp → πX [7][8][9][10][11][12] reactions. Where larger error bars would overlap, the π − point has been shifted slightly to the right for better visibility.…”

“…The necessity of this systematic approach has been made particularly clear by the high-visibility parallel developments in the subfield of J/ψ production [4,5]. Significant amounts of experimental data on π and K production in pp collisions are available in the energy range 20 GeV √ s 60 GeV [6][7][8][9][10][11][12]. Higher energies are less thoroughly explored, with mostly calorimetric data on total hadron production (in lieu of the identified pion and kaon spectra at lower energies).…”

Measurement of neutral mesons inp+pcollisions ats=200 GeVand scaling properties of hadron production

“…There exists a large body of experimental data on hadron production in p + p collisions measured at the ISR, SppS, Tevatron, and RHIC [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. At high p T the spectra display a power law behavior that becomes more and more evident as the interaction energy increases.…”