Open charm enhancement by secondary interactions in relativistic nucleus-nucleus collisions?

被引：26
作者：
Cassing, W [1 ]
Kondratyuk, LA
Lykasov, GI
Rzjanin, MV
机构：
[1] Univ Giessen, Inst Theoret Phys, D-35392 Giessen, Germany
[2] Inst Theoret & Expt Phys, Moscow 1172259, Russia
[3] Joint Inst Nucl Res, Dubna 141980, Moscow Region, Russia
来源：
PHYSICS LETTERS B | 2001年 / 513卷 / 1-2期
关键词：
relativistic heavy-ion collisions; meson productions; charmed mesons; charmed quarks;
D O I：
10.1016/S0370-2693(01)00744-4
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We calculate open charm production in Pb + Pb reactions at SPS energies within the HSD transport approach - which is based on string, quark, diquark (q, (q) over bar, qq, (q) over bar(q) over bar) and hadronic degrees of freedom - including the production of open charm pairs from secondary 'meson'-'baryon' (or quark-diquark and antiquark-diquark) collisions. It is argued that at collision energies close to the c (c) over bar pair threshold the dominant production mechanism is related to the two body (or quasi two body) reactions piN --> (D) over bar((D) over bar*)Lambda (c), (Sigma (c)). Estimates within the framework of the Quark-Gluon String model suggest cross sections of a few Pb for piN --> (D) over bar Lambda (c) in the region of 1 GeV above threshold. The dynamical transport calculations for Pb + Pb at 160 A GeV indicate that the open charm enhancement reported by the NA50 Collaboration might be due to such secondary reaction mechanisms. (C) 2001 Elsevier Science B.V. All rights reserved.
引用
收藏
页码：1 / 8
页数：8
相关论文
共 45 条
  • [1] Evidence for deconfinement of quarks and gluons from the J/ψ suppression pattern measured in Pb-Pb collisions at the CERN-SPS
    Abreu, MC
    Alessandro, B
    Alexa, C
    Arnaldi, R
    Atayan, M
    Baglin, C
    Baldit, A
    Bedjidian, M
    Beolè, S
    Boldea, V
    Bordalo, P
    Bussière, A
    Capelli, L
    Casagrande, L
    Castor, J
    Chambon, T
    Chaurand, B
    Chevrot, I
    Cheynis, B
    Chiavassa, EK
    Cicalò, C
    Comets, MP
    Constans, N
    Constantinescu, S
    Cruz, J
    De Falco, A
    Dellacasa, G
    De Marco, N
    Devaux, A
    Dita, S
    Drapier, O
    Ducroux, L
    Espagnon, B
    Fargeix, J
    Force, P
    Gallio, M
    Gavrilov, YK
    Gerschel, C
    Giubellino, P
    Golubeva, MB
    Gonin, M
    Grigorian, AA
    Grossiord, JY
    Guber, FF
    Guichard, A
    Gulkanyan, H
    Hakobyan, R
    Haroutunian, R
    Idzik, M
    Jouan, D
    [J]. PHYSICS LETTERS B, 2000, 477 (1-3) : 28 - 36
  • [2] Dimuon and charm production in nucleus-nucleus collisions at the CERN-SPS
    Abreu, MC
    Alessandro, B
    Alexa, C
    Arnaldi, R
    Astruc, J
    Atayan, M
    Baglin, C
    Baldit, A
    Bedjidian, M
    Bellaiche, F
    Beolé, S
    Boldea, V
    Bordalo, P
    Borhani, A
    Bussière, A
    Capelli, L
    Capony, V
    Casagrande, L
    Castor, J
    Chambon, T
    Chaurand, B
    Chevrot, I
    Cheynis, B
    Chiavassa, E
    Cicalò, C
    Claudino, T
    Comets, MP
    Constans, N
    Constantinescu, S
    Cruz, J
    De Falco, A
    De Marco, N
    Dellacasa, G
    Devaux, A
    Dita, S
    Drapier, O
    Ducroux, L
    Espagnon, B
    Fargeix, J
    Fleuret, F
    Force, P
    Gallio, M
    Gavrilov, YK
    Gerschel, C
    Giubellino, P
    Golubeva, MB
    Gonin, M
    Grigorian, AA
    Grossiord, JY
    Guber, FF
    [J]. EUROPEAN PHYSICAL JOURNAL C, 2000, 14 (03): : 443 - 455
  • [3] Observation of a threshold effect in the anomalous J/ψ suppression
    Abreu, MC
    Alessandro, B
    Alexa, C
    Arnaldi, R
    Astruc, J
    Atayan, M
    Baglin, C
    Baldit, A
    Bedjidian, M
    Bellaiche, F
    Beolè, S
    Boldea, V
    Bordalo, P
    Bussière, A
    Capony, V
    Casagrande, L
    Castor, J
    Chambon, T
    Chaurand, B
    Chevrot, I
    Cheynis, B
    Chiavassa, E
    Cicalò, C
    Comets, MP
    Constans, N
    Constantinescu, S
    Cruz, J
    De Falco, A
    Dellacasa, G
    De Marco, N
    Devaux, A
    Dita, S
    Drapier, O
    Espagnon, B
    Fargeix, J
    Filippov, SN
    Fleuret, F
    Force, P
    Gallio, M
    Gatignon, L
    Gavrilov, YK
    Gerschel, C
    Giubellino, P
    Golubeva, MB
    Gonin, M
    Grigorian, AA
    Grossiord, JY
    Guber, FF
    Guichard, A
    Gulkanyan, H
    [J]. PHYSICS LETTERS B, 1999, 450 (04) : 456 - 466
  • [4] D-ASTERISK-D-PI AND B-ASTERISK-B-PI COUPLINGS IN QCD
    BELYAEV, VM
    BRAUN, VM
    KHODJAMIRIAN, A
    RUCKL, R
    [J]. PHYSICAL REVIEW D, 1995, 51 (11): : 6177 - 6195
  • [5] THE LUND MONTE-CARLO FOR HADRONIC PROCESSES - PYTHIA VERSION 4.8
    BENGTSSON, HU
    SJOSTRAND, T
    [J]. COMPUTER PHYSICS COMMUNICATIONS, 1987, 46 (01) : 43 - 82
  • [6] BORESKOV BG, 1983, YAD FIZ, V37, P174
  • [7] Open charm contribution to dilepton spectra produced in nuclear collisions at SPS energies
    Braun-Munzinger, P
    Miskowiec, D
    Drees, A
    Lourenco, C
    [J]. EUROPEAN PHYSICAL JOURNAL C, 1998, 1 (1-2): : 123 - 130
  • [8] Effective functional form of Regge trajectories -: art. no. 054013
    Brisudová, MM
    Burakovsky, L
    Goldman, T
    [J]. PHYSICAL REVIEW D, 2000, 61 (05) : 1 - 15
  • [9] Nonsaturation of the J/ψ suppression at large transverse energy in the comovers approach
    Capella, A
    Ferreiro, EG
    Kaidalov, AB
    [J]. PHYSICAL REVIEW LETTERS, 2000, 85 (10) : 2080 - 2083
  • [10] Excitation functions of hadronic observables from SIS to RHIC energies
    Cassing, W
    Bratkovskaya, EL
    Juchem, S
    [J]. NUCLEAR PHYSICS A, 2000, 674 (1-2) : 249 - 276
12345