Academic Journal
LBNL-42028 Bremsstrahlung Dileptons in Ultra-relativistic Heavy Ion Collisions
| العنوان: | LBNL-42028 Bremsstrahlung Dileptons in Ultra-relativistic Heavy Ion Collisions |
|---|---|
| المؤلفون: | J. Jalilian-marian, V. Koch |
| المساهمون: | The Pennsylvania State University CiteSeerX Archives |
| المصدر: | http://arxiv.org/pdf/nucl-th/9807013v1.pdf. |
| سنة النشر: | 1998 |
| المجموعة: | CiteSeerX |
| الوصف: | We consider production of dilepton pairs through coherent electro-magnetic radiation during nuclear collisions. We show that the number of pairs produced through bremsstrahlung is about two orders of magnitude smaller than the yield measured by the CERES collaboration. Therefore, coherent bremsstrahlung can be ruled out as an explanation for the observed enhancement of low mass dileptons in CERES and HELIOS. Production of low mass dileptons in ultra-relativistic heavy ion collisions is considered a useful probe of possible in-medium changes of hadrons due to the onset of chiral restoration (see [1] for a recent review). Dilepton are penetrating probes, i.e. once produced they do not re-interact with the hadronic environment and thus, provide information about the early stages of the collision where high temperatures and densities are reached. Since vector mesons such as ρ, ω and Φ have direct decay channels into dileptons, possible in-medium changes of the vector mesons masses can be observed in the dilepton invariant mass spectrum. There has been a major surge of interest in dilepton mass spectrum due to a recent |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.264.4093; http://arxiv.org/pdf/nucl-th/9807013v1.pdf |
| الاتاحة: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.264.4093 http://arxiv.org/pdf/nucl-th/9807013v1.pdf |
| Rights: | Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: | edsbas.D289E513 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |