Abstract
Results on (anti-)hypertriton production in Pb-Pb collisions at = 2.76 TeV, obtained by ALICE at the LHC, are reported. The (anti-)3Λ H signal is extracted exploiting its mesonic decay (3ΛH → 3He + π), via the topological identification of secondary vertices and the analysis of the invariant mass distributions of (3He, π) pairs. The (3He,π) invariant mass distributions in different transverse momentum and in proper time intervals are shown. Search for ΛΛ state (H-Dibaryon) via its decay H-Dibaryon → Λpπ− is discussed. As no H-Dibaryon signal is observed, an upper limit on its production yield has been determined.
Highlights
Ultra-relativistic heavy-ion collisions provide a unique opportunity for understanding the strong interaction: many strange hadrons are produced in the collision and the study of their production yield helps to understand the nature of the space-time evolution and chemical equilibrium of the hadronic reball
In high-energy heavy-ion collisions hyperon-baryon bound systems, called hypernuclei, can emerge from the hot and dense reball region of the reaction. Their production yield can be estimated by employing two distinct models: they can be formed via the coalescence of nucleons and hyperons produced in the collision or they can be produced directly in the hadronization process
The study of the production yield of hypernuclei at the LHC energy can help to distinguish between the two models, as the production yield is expected to be dierent in the two approaches
Summary
This content has been downloaded from IOPscience. Please scroll down to see the full text. View the table of contents for this issue, or go to the journal homepage for more. Download details: IP Address: 188.184.3.52 This content was downloaded on 20/05/2014 at 11:44. Please note that terms and conditions apply
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