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arXiv 0706.0729nucl-ex
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RHIC碰撞中的共振产生

Resonance Production in RHIC Collisions

Christina Markert

摘要:

在RHIC测量的共振粒子生产的结果在$\sqrt{s_{\rm NN}} = $ 200 GeV的Au+Au碰撞进行比较,在p+p和d+Au碰撞的测量,以验证扩展的硬相互作用介质的存在。在火球寿命期间,由于共振衰变和随后的衰变子体的再散射以及从其衰变产物中再生共振,共振的产额和动量分布可能会被修改。重离子碰撞中动量谱的修正可能会改变核修正因子R $_{\rm AA}$。讨论了共振的后期再生对椭圆流v $_{2}$的影响。

英文摘要:

Results of resonance particle production measured at RHIC in $\sqrt{s_{\rm NN}} = $ 200 GeV Au+Au collisions are compared to measurements in p+p and d+Au collisions in order to verify the existence of an extended hardronically interacting medium. Yield and momentum distributions of resonances maybe modified during the fireball lifetime due to resonance decay and the subsequent rescattering of their decay daughters as well as the regeneration of resonances from their decay products. Modified momentum spectra in heavy ion collisions may change the nuclear modification factor R$_{\rm AA}$. The influence on the elliptic flow v$_{2}$ due to late regeneration of resonances is discussed.

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