arXiv 1602.021732016-02-05nucl-exhep-ex

在LHC上用ALICE产生（反）（超）核和寻找奇异束缚态的结果

Results from (anti-)(hyper-)nuclei production and searches for exotic bound states with ALICE at the LHC

Natasha Sharma

备注：: 4 pages, 7 figures, Quark Matter Conference at Kobe, Japan 2015 proceedings, submitted at Nuclear Physics A
DOI：: 10.1016/j.nuclphysa.2016.01.066

摘要：

利用时间投影室和飞行时间探测器，ALICE探测器具有出色的粒子识别能力，可以探测轻核和反核。此外，由内部跟踪系统提供的高跟踪分辨率使得能够将初级核与来自较重系统的衰变的那些分离。这允许重建衰变，如超介子弱衰变（$^3_Λ$ H $\rightarrow ^3$ He + $π^-$），$Λ$ n的假设束缚态衰变为氘和π，或H-双重子衰变为$Λ$，质子和$π^{-}$。综述了质子-质子、质子-铅、特别是铅-铅碰撞中稳定核和反核的产生。超核生产率在铅-铅也显示，连同上限估计的生产假设的外来候选人。结果进行了比较与预测的生产热（统计）和聚结模型。

英文摘要：

The excellent particle identification capabilities of the ALICE detector, using the time projection chamber and the time-of-flight detector, allow the detection of light nuclei and anti-nuclei. Furthermore, the high tracking resolution provided by the inner tracking system enables the separation of primary nuclei from those coming from the decay of heavier systems. This allows for the reconstruction of decays such as the hypertriton mesonic weak decay ($^3_Λ$H$\rightarrow ^3$He + $π^-$), the decay of a hypothetical bound state of a $Λ$n into a deuteron and pion or the H-dibaryon decaying into a $Λ$, a proton and a $π^{-}$. An overview of the production of stable nuclei and anti-nuclei in proton-proton, proton-lead and, in particular, lead-lead collisions is presented. Hypernuclei production rates in Pb--Pb are also shown, together with the upper limits estimated on the production of hypothetical exotica candidates. The results are compared with predictions for the production in thermal (statistical) and coalescence models.

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英文摘要：

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