Antiparticle to particle ratios and identified hadron spectra in Cu plus Cu and Au plus Au collisions

被引：4
|
作者：
Veres, Gabor I.
机构：
[1] MIT, Cambridge, MA 02139 USA
[2] Eotvos Lorand Univ, H-1117 Budapest, Hungary
来源：
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS | 2007年 / 34卷 / 08期
关键词：
D O I：
10.1088/0954-3899/34/8/S165
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
New results on antiparticle to particle ratios in Cu+Cu and Au+Au collisions at root(NN)-N-S = 62.4 and 200 GeV from the PHOBOS experiment at RHIC are presented. Transverse momentum spectra of pions, kaons, protons and antiprotons from Au+Au collisions at root(NN)-N-S = 62.4 GeV close to mid-rapidity are also discussed. Antiparticle to particle ratios are found to be remarkably independent of the collision centrality in both colliding systems. The collision energy dependence of the (p) over bar /p ratios is very significant in Cu+Cu collisions. Baryons are found to have substantially harder transverse momentum spectra than mesons. The p(T) region in which the proton to pion ratio reaches unity in central Au+Au collisions at root(NN)-N-S = 62.4 GeV fits into a smooth trend as a function of collision energy. The observed particle yields at very low p(T) are comparable to extrapolations from higher p(T) for kaons, protons and antiprotons. The net proton yield at mid-rapidity is found to be proportional to the number of participant nucleons in Au+Au collisions at 62.4 and 200 GeV energies.
引用
收藏
页码：S1103 / S1107
页数：5
相关论文
共 50 条
  • [31] System size, energy, centrality and pseudorapidity dependence of charged-particle density in Au plus Au and Cu plus Cu collisions at RHIC
    Veres, G. I.
    INDIAN JOURNAL OF PHYSICS, 2011, 85 (07) : 1015 - 1019
  • [32] Particle spectra and elliptic flow in Au plus Au collisions at RHIC
    Margetis, S
    CORRELATIONS & FLUCTUATIONS IN QCD, 2003, : 269 - 278
  • [33] Charged Hadron Production in Cu plus Au Collisions at 200 GeV in the PHENIX Experiment
    Larionova, D. M.
    Berdnikov, Ya A.
    Berdnikov, A. Ya
    Kotov, D. O.
    Mitrankov, Yu M.
    PHYSICS OF PARTICLES AND NUCLEI, 2022, 53 (02) : 261 - 264
  • [34] K*0 production in Cu plus Cu and Au plus Au collisions at √sNN=62.4 GeV and 200 GeV
    Aggarwal, M. M.
    Ahammed, Z.
    Alakhverdyants, A. V.
    Alekseev, I.
    Alford, J.
    Anderson, B. D.
    Anson, C. D.
    Arkhipkin, D.
    Averichev, G. S.
    Balewski, J.
    Barnby, L. S.
    Baumgart, S.
    Beavis, D. R.
    Bellwied, R.
    Betancourt, M. J.
    Betts, R. R.
    Bhasin, A.
    Bhati, A. K.
    Bichsel, H.
    Bielcik, J.
    Bielcikova, J.
    Biritz, B.
    Bland, L. C.
    Bonner, B. E.
    Bouchet, J.
    Braidot, E.
    Brandin, A. V.
    Bridgeman, A.
    Bruna, E.
    Bueltmann, S.
    Bunzarov, I.
    Burton, T. P.
    Cai, X. Z.
    Caines, H.
    Sanchez, M. Calderon de la Barca
    Catu, O.
    Cebra, D.
    Cendejas, R.
    Cervantes, M. C.
    Chajecki, Z.
    Chaloupka, P.
    Chattopadhyay, S.
    Chen, H. F.
    Chen, J. H.
    Chen, J. Y.
    Cheng, J.
    Cherney, M.
    Chikanian, A.
    Choi, K. E.
    Christie, W.
    PHYSICAL REVIEW C, 2011, 84 (03):
  • [35] Particle spectra and HBT radii for simulated central nuclear collisions of C plus C, Al plus Al, Cu plus Cu, Au plus Au, and Pb plus Pb from √s=62.4-2760 GeV
    Habich, M.
    Nagle, J. L.
    Romatschke, P.
    EUROPEAN PHYSICAL JOURNAL C, 2015, 75 (01):
  • [36] Systematic study of azimuthal anisotropy in Cu plus Cu and Au plus Au collisions at √sNN=62.4 and 200 GeV
    Adare, A.
    Afanasiev, S.
    Aidala, C.
    Ajitanand, N. N.
    Akiba, Y.
    Al-Bataineh, H.
    Al-Jamel, A.
    Alexander, J.
    Aoki, K.
    Aphecetche, L.
    Armendariz, R.
    Aronson, S. H.
    Asai, J.
    Atomssa, E. T.
    Averbeck, R.
    Awes, T. C.
    Azmoun, B.
    Babintsev, V.
    Baksay, G.
    Baksay, L.
    Baldisseri, A.
    Barish, K. N.
    Barnes, P. D.
    Bassalleck, B.
    Bathe, S.
    Batsouli, S.
    Baublis, V.
    Bauer, F.
    Bazilevsky, A.
    Belikov, S.
    Bennett, R.
    Berdnikov, Y.
    Bickley, A. A.
    Bjorndal, M. T.
    Boissevain, J. G.
    Borel, H.
    Boyle, K.
    Brooks, M. L.
    Brown, D. S.
    Bucher, D.
    Buesching, H.
    Bumazhnov, V.
    Bunce, G.
    Burward-Hoy, J. M.
    Butsyk, S.
    Campbell, S.
    Chai, J-S.
    Chang, B. S.
    Charvet, J-L.
    Chernichenko, S.
    PHYSICAL REVIEW C, 2015, 92 (03)
  • [37] Quantifying photoproduction corrections to J/ψ measurements in Au plus Au and Cu plus Cu collisions at √SNN=200 GeV
    Liu, Zhejin
    Tang, Zebo
    Wu, Xin
    Zha, Wangmei
    PHYSICAL REVIEW C, 2024, 109 (03)
  • [38] System size dependence of strange particle correlations in Cu plus Cu and Au plus Au collisions at √sNN=200GeV in STAR at RHIC
    Nattrass, C. E.
    JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS, 2008, 35 (04)
  • [39] J/ψ production at low pT in Au plus Au and Cu plus Cu collisions at √sNN=200 GeV with the STAR detector
    Adamczyk, L.
    Adkins, J. K.
    Agakishiev, G.
    Aggarwal, M. M.
    Ahammed, Z.
    Alekseev, I.
    Alford, J.
    Anson, C. D.
    Aparin, A.
    Arkhipkin, D.
    Aschenauer, E. C.
    Averichev, G. S.
    Banerjee, A.
    Beavis, D. R.
    Bellwied, R.
    Bhasin, A.
    Bhati, A. K.
    Bhattarai, P.
    Bichsel, H.
    Bielcik, J.
    Bielcikova, J.
    Bland, L. C.
    Bordyuzhin, I. G.
    Borowski, W.
    Bouchet, J.
    Brandin, A. V.
    Brovko, S. G.
    Bueltmann, S.
    Bunzarov, I.
    Burton, T. P.
    Butterworth, J.
    Caines, H.
    Sanchez, M. Calderon de la Barca
    Campbell, J. M.
    Cebra, D.
    Cendejas, R.
    Cervantes, M. C.
    Chaloupka, P.
    Chang, Z.
    Chattopadhyay, S.
    Chen, H. F.
    Chen, J. H.
    Chen, L.
    Cheng, J.
    Cherney, M.
    Chikanian, A.
    Christie, W.
    Chwastowski, J.
    Codrington, M. J. M.
    Contin, G.
    PHYSICAL REVIEW C, 2014, 90 (02):
  • [40] Participant and spectator scaling of spectator fragments in Au plus Au and Cu plus Cu collisions at √sNN=19.6 and 22.4 GeV
    Alver, B.
    Back, B. B.
    Baker, M. D.
    Ballintijn, M.
    Barton, D. S.
    Betts, R. R.
    Bickley, A. A.
    Bindel, R.
    Budzanowski, A.
    Busza, W.
    Carroll, A.
    Chai, Z.
    Chetluru, V.
    Decowski, M. P.
    Garcia, E.
    Gburek, T.
    George, N.
    Gulbrandsen, K.
    Gushue, S.
    Halliwell, C.
    Hamblen, J.
    Harnarine, I.
    Heintzelman, G. A.
    Henderson, C.
    Hofman, D. J.
    Hollis, R. S.
    Holynski, R.
    Holzman, B.
    Iordanova, A.
    Johnson, E.
    Kane, J. L.
    Katzy, J.
    Khan, N.
    Kucewicz, W.
    Kulinich, P.
    Kuo, C. M.
    Li, W.
    Lin, W. T.
    Loizides, C.
    Manly, S.
    McLeod, D.
    Mignerey, A. C.
    Nouicer, R.
    Olszewski, A.
    Pak, R.
    Park, I. C.
    Pernegger, H.
    Reed, C.
    Remsberg, L. P.
    Reuter, M.
    PHYSICAL REVIEW C, 2016, 94 (02)
12345