Probing meson spectral functions with double differential dilepton spectra in heavy-ion collisions

被引：5
作者：
Kämpfer, B
Pavlenko, OP
机构：
[1] Forschungszentrum Rossendorf EV, D-01314 Dresden, Germany
[2] Inst Theoret Phys, UA-252143 Kiev 143, Ukraine
来源：
EUROPEAN PHYSICAL JOURNAL A | 2001年 / 10卷 / 01期
关键词：
D O I：
10.1007/s100500170149
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：
The double differential dilepton spectrum dN/(dM(2) dM(perpendicular to)(2)) at fixed transverse mass M-perpendicular to allows a direct access to the vector meson spectral functions. Within a fireball model the sensitivity of dN/(dM(2) dM(perpendicular to)(2)) against variations of both the in-medium properties of mesons and the dynamics of the fireball is investigated. In contrast to the integrated invariant-mass spectrum dN/dM(2), in the spectrum dN/(dM(2) dM(perpendicular to)(2)) with fixed M-perpendicular to the omega signal is clearly seen as bump riding on the rho background even in case of strong in-medium modifications.
引用
收藏
页码：101 / 107
页数：7
相关论文
共 27 条
  • [1] Brown G. E., 1996, Physics Reports, V269, P333, DOI 10.1016/0370-1573(95)00067-4
  • [2] Brown GE, 1998, ACTA PHYS POL B, V29, P2309
  • [3] Hadronic and electromagnetic probes of hot and dense nuclear matter
    Cassing, W
    Bratkovskaya, EL
    [J]. PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 1999, 308 (2-3): : 65 - 233
  • [4] Influence of impact parameter on thermal description of relativistic heavy ion collisions at (1-2)A GeV
    Cleymans, J
    Oeschler, H
    Redlich, K
    [J]. PHYSICAL REVIEW C, 1999, 59 (03): : 1663 - 1673
  • [5] SINGLE-PARTICLE DISTRIBUTION IN HYDRODYNAMIC AND STATISTICAL THERMODYNAMIC MODELS OF MULTIPARTICLE PRODUCTION
    COOPER, F
    FRYE, G
    [J]. PHYSICAL REVIEW D, 1974, 10 (01): : 186 - 189
  • [6] Intermediate mass excess of dilepton production in heavy ion collisions at relativistic energies
    Ernst, C
    Bass, SA
    Belkacem, M
    Stocker, H
    Greiner, W
    [J]. PHYSICAL REVIEW C, 1998, 58 (01): : 447 - 456
  • [7] Dilepton spectra from decays of light unflavored mesons
    Faessler, A
    Fuchs, C
    Krivoruchenko, MI
    [J]. PHYSICAL REVIEW C, 2000, 61 (03): : 23
  • [8] Studying in-medium hadron properties with HADES
    Friese, J
    [J]. PROGRESS IN PARTICLE AND NUCLEAR PHYSICS, VOL 42: HEAVY ION COLLISIONS FROM NUCLEAR TO QUARK MATTER, 1999, 42 : 235 - 245
  • [9] GALLMEISTER B, IN PRESS NUCL PHYS A
  • [10] Is there a unique thermal source of dileptons in Pb(158 A•GeV) + Au, Pb reactions?
    Gallmeister, K
    Kämpfer, B
    Pavlenko, OP
    [J]. PHYSICS LETTERS B, 2000, 473 (1-2) : 20 - 24
123