Abstract
We study the energy dependence of the transverse momentum (p{sub T}) spectra for charged pions, protons and anti-protons for Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV. Data are presented at mid-rapidity (|y|<0.5) for 0.2<p{sub T}<12GeV/c. In the intermediate p{sub T} region (2<p{sub T}<6GeV/c), the nuclear modification factor is higher at 62.4 GeV than at 200 GeV, while at higher p{sub T} (p{sub T}>7GeV/c) the modification is similar for both energies. The p/{pi}{sup +} and p-bar /{pi}{sup -} ratios for central collisions at {radical}(s{sub NN})=62.4GeV peak at p{sub T}{approx_equal}2GeV/c. In the p{sub T} range where recombination is expected to dominate, the p/{pi}{sup +} ratios at 62.4 GeV are larger than at 200 GeV, while the p-bar /{pi}{sup -} ratios are smaller. For p{sub T}>2GeV/c, the p-bar /{pi}{sup -} ratios at the two beam energies are independent of p{sub T} and centrality indicating that the dependence of the p-bar /{pi}{sup -} ratio on p{sub T} does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence.
Abelev, B I;
[1]
Aggarwal, M M;
[2]
Ahammed, Z;
[3]
Anderson, B D;
[4]
Arkhipkin, D;
[5]
Averichev, G S;
[6]
Bai, Y;
[7]
Balewski, J;
[8]
Barannikova, O;
[1]
Barnby, L S;
[9]
Baumgart, S;
[10]
Belaga, V V;
[6]
Bellingeri-Laurikainen, A;
[11]
Bellwied, R;
[12]
Benedosso, F;
[7]
Betts, R R;
[1]
Bharadwaj, S;
[13]
Bhasin, A;
[14]
Bhati, A K;
[2]
Bichsel, H
[15]
- University of Illinois, Chicago (United States)
- Panjab University, Chandigarh 160014 (India)
- Variable Energy Cyclotron Centre, Kolkata 700064 (India)
- Kent State University, Kent, OH 44242 (United States)
- Particle Physics Laboratory (JINR), Dubna (Russian Federation)
- Laboratory for High Energy (JINR), Dubna (Russian Federation)
- NIKHEF and Utrecht University, Amsterdam (Netherlands)
- Indiana University, Bloomington, IN 47408 (United States)
- University of Birmingham, Birmingham (United Kingdom)
- Yale University, New Haven, CT 06520 (United States)
- SUBATECH, Nantes (France)
- Wayne State University, Detroit, MI 48201 (United States)
- University of Rajasthan, Jaipur 302004 (India)
- University of Jammu, Jammu 180001 (India)
- University of Washington, Seattle, WA 98195 (United States)
Citation Formats
Abelev, B I, Aggarwal, M M, Ahammed, Z, Anderson, B D, Arkhipkin, D, Averichev, G S, Bai, Y, Balewski, J, Barannikova, O, Barnby, L S, Baumgart, S, Belaga, V V, Bellingeri-Laurikainen, A, Bellwied, R, Benedosso, F, Betts, R R, Bharadwaj, S, Bhasin, A, Bhati, A K, and Bichsel, H.
Energy dependence of {pi}{sup {+-}}, p and p-bar transverse momentum spectra for Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV.
Netherlands: N. p.,
2007.
Web.
doi:10.1016/j.physletb.2007.06.035.
Abelev, B I, Aggarwal, M M, Ahammed, Z, Anderson, B D, Arkhipkin, D, Averichev, G S, Bai, Y, Balewski, J, Barannikova, O, Barnby, L S, Baumgart, S, Belaga, V V, Bellingeri-Laurikainen, A, Bellwied, R, Benedosso, F, Betts, R R, Bharadwaj, S, Bhasin, A, Bhati, A K, & Bichsel, H.
Energy dependence of {pi}{sup {+-}}, p and p-bar transverse momentum spectra for Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV.
Netherlands.
https://doi.org/10.1016/j.physletb.2007.06.035
Abelev, B I, Aggarwal, M M, Ahammed, Z, Anderson, B D, Arkhipkin, D, Averichev, G S, Bai, Y, Balewski, J, Barannikova, O, Barnby, L S, Baumgart, S, Belaga, V V, Bellingeri-Laurikainen, A, Bellwied, R, Benedosso, F, Betts, R R, Bharadwaj, S, Bhasin, A, Bhati, A K, and Bichsel, H.
2007.
"Energy dependence of {pi}{sup {+-}}, p and p-bar transverse momentum spectra for Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV."
Netherlands.
https://doi.org/10.1016/j.physletb.2007.06.035.
@misc{etde_21031718,
title = {Energy dependence of {pi}{sup {+-}}, p and p-bar transverse momentum spectra for Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV}
author = {Abelev, B I, Aggarwal, M M, Ahammed, Z, Anderson, B D, Arkhipkin, D, Averichev, G S, Bai, Y, Balewski, J, Barannikova, O, Barnby, L S, Baumgart, S, Belaga, V V, Bellingeri-Laurikainen, A, Bellwied, R, Benedosso, F, Betts, R R, Bharadwaj, S, Bhasin, A, Bhati, A K, and Bichsel, H}
abstractNote = {We study the energy dependence of the transverse momentum (p{sub T}) spectra for charged pions, protons and anti-protons for Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV. Data are presented at mid-rapidity (|y|<0.5) for 0.2<p{sub T}<12GeV/c. In the intermediate p{sub T} region (2<p{sub T}<6GeV/c), the nuclear modification factor is higher at 62.4 GeV than at 200 GeV, while at higher p{sub T} (p{sub T}>7GeV/c) the modification is similar for both energies. The p/{pi}{sup +} and p-bar /{pi}{sup -} ratios for central collisions at {radical}(s{sub NN})=62.4GeV peak at p{sub T}{approx_equal}2GeV/c. In the p{sub T} range where recombination is expected to dominate, the p/{pi}{sup +} ratios at 62.4 GeV are larger than at 200 GeV, while the p-bar /{pi}{sup -} ratios are smaller. For p{sub T}>2GeV/c, the p-bar /{pi}{sup -} ratios at the two beam energies are independent of p{sub T} and centrality indicating that the dependence of the p-bar /{pi}{sup -} ratio on p{sub T} does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence.}
doi = {10.1016/j.physletb.2007.06.035}
journal = []
issue = {3-4}
volume = {655}
place = {Netherlands}
year = {2007}
month = {Nov}
}
title = {Energy dependence of {pi}{sup {+-}}, p and p-bar transverse momentum spectra for Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV}
author = {Abelev, B I, Aggarwal, M M, Ahammed, Z, Anderson, B D, Arkhipkin, D, Averichev, G S, Bai, Y, Balewski, J, Barannikova, O, Barnby, L S, Baumgart, S, Belaga, V V, Bellingeri-Laurikainen, A, Bellwied, R, Benedosso, F, Betts, R R, Bharadwaj, S, Bhasin, A, Bhati, A K, and Bichsel, H}
abstractNote = {We study the energy dependence of the transverse momentum (p{sub T}) spectra for charged pions, protons and anti-protons for Au+Au collisions at {radical}(s{sub NN})=62.4 and 200 GeV. Data are presented at mid-rapidity (|y|<0.5) for 0.2<p{sub T}<12GeV/c. In the intermediate p{sub T} region (2<p{sub T}<6GeV/c), the nuclear modification factor is higher at 62.4 GeV than at 200 GeV, while at higher p{sub T} (p{sub T}>7GeV/c) the modification is similar for both energies. The p/{pi}{sup +} and p-bar /{pi}{sup -} ratios for central collisions at {radical}(s{sub NN})=62.4GeV peak at p{sub T}{approx_equal}2GeV/c. In the p{sub T} range where recombination is expected to dominate, the p/{pi}{sup +} ratios at 62.4 GeV are larger than at 200 GeV, while the p-bar /{pi}{sup -} ratios are smaller. For p{sub T}>2GeV/c, the p-bar /{pi}{sup -} ratios at the two beam energies are independent of p{sub T} and centrality indicating that the dependence of the p-bar /{pi}{sup -} ratio on p{sub T} does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence.}
doi = {10.1016/j.physletb.2007.06.035}
journal = []
issue = {3-4}
volume = {655}
place = {Netherlands}
year = {2007}
month = {Nov}
}