<> "The repository administrator has not yet configured an RDF license."^^ . <> . . "3 lambda H and 4 lambda H production in Ni+Ni collisions at 1.91A GeV"^^ . "$^3_{\\Lambda}H$ and $^4_{\\Lambda}H$ are identified from their two-body $\\pi^-$-decay channel in Ni+Ni collisions at 1.91A GeV for the first time. The experiment was performed by the FOPI spectrometer at the SIS18 of GSI. The analyzed data sample consists of 56${\\times}10^{6}$ events covering the most central 60\\% of the total reaction cross section.\r\n%\r\nThe reconstructed invariant mass of $^3_{\\Lambda}H$ is $2.9926\\pm0.0017$ GeV/c$^2$ with a width of $5.6\\pm1.0$ MeV/c$^2$, and the one of $^4_{\\Lambda}H$ is $3.9226{\\pm}0.0010$ GeV/c$^2$ with a width of $4.0\\pm1.6$ MeV/c$^2$. The significance of the $^3_{\\Lambda}H$ and $^4_{\\Lambda}H$ signal is 5.6 and 4.2, respectively. The $^3_{\\Lambda}H$ and $^4_{\\Lambda}H$ signal is observed in a certain phase space region in the $p_t/m-y_{lab}$ plane only.\r\n%By applying the differential decay time efficiency obtained from MC simulation, the mean lifetime of $^3_{\\Lambda}H$ and $^4_{\\Lambda}H$ is found to be 263$\\pm$64(sta)$\\pm$44(sys) ps and 196$\\pm$75(sta)$\\pm$43(sys) ps, respectively. By taking reconstruction efficiency and the decay branching ratio into account, the yield of $^3_{\\Lambda}H$ and $^4_{\\Lambda}H$ for the analysed event sample is $7.5{\\times}10^{-4}$ and $1.3{\\times}10^{-4}$ per event, respectively.\r\n%The $^3_{\\Lambda}H$ and $^4_{\\Lambda}H$ production in Ni+Ni at 1.91A GeV via coalescence process is naively discussed and it is shown that the observed results are not compatible with the expectations. The yield ratio of $^3_{\\Lambda}H$e/$^3$He and $^4_{\\Lambda}H$e/$^4$He is compared with the predictions of the thermal model for hadron chemistry.\r\n"^^ . "2013" . . . . . . . "Yapeng"^^ . "Zhang"^^ . "Yapeng Zhang"^^ . . . . . . "3 lambda H and 4 lambda H production in Ni+Ni collisions at 1.91A GeV (PDF)"^^ . . . "Dis_Zhang.pdf"^^ . . . "3 lambda H and 4 lambda H production in Ni+Ni collisions at 1.91A GeV (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "3 lambda H and 4 lambda H production in Ni+Ni collisions at 1.91A GeV (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "3 lambda H and 4 lambda H production in Ni+Ni collisions at 1.91A GeV (Other)"^^ . . . . . . "preview.jpg"^^ . . . "3 lambda H and 4 lambda H production in Ni+Ni collisions at 1.91A GeV (Other)"^^ . . . . . . "medium.jpg"^^ . . . "3 lambda H and 4 lambda H production in Ni+Ni collisions at 1.91A GeV (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #14793 \n\n3 lambda H and 4 lambda H production in Ni+Ni collisions at 1.91A GeV\n\n" . "text/html" . . . "530 Physik"@de . "530 Physics"@en . .