论文标题
$ \rmΩ_c^0 $在$ \ sqrt {s} = 13 $ tev中的首次测量
First measurement of $\rm Ω_c^0$ production in pp collisions at $\sqrt{s}=13$ TeV
论文作者
论文摘要
魅力 - 造成的baryon $ \rmΩ_c^0 $的包含生产是通过其在中等差异（$ | y | <0.5 $）的$ \ rmmomomome-proton（pp）（pp）在Centre-Mass Energy $ $ $ \ s的clipe clitation（$ | y | <0.5 $）时首次测量的。横向动量（$ p _ {\ rm t} $）以$ 2 <p _ {\ rm t} <12〜 {\ rm gev}/c $表示，以$ 2 <p _ {\ rm t} <p _ {\ rm t} <p _ {\ rm t} <p _ {\ rm t}/c $表示，乘以分支比。 $ p _ {\ rm t} $依赖性相对于提示$ \ rm d^0 $ -Meson的$ \ rmω__c^0 $ -BARYON生产，以及与各种型号相比，将$ \ rmξ_c^0 $ -BARYON生产与各种模型相比，将不同的型号与不同的型号进行了考虑。在所测量的$ p _ {\ rm t} $间隔中，$ p _ {\ rm t} $的比率为$ \ rmω_c^0 $的集成横截面，并提示$ c^{\ rm c}^{+rm c}^{+baryons乘以$ $ \ rmm rmm rmm rmm rmm^-rm rmm^rmm rmm^^^-rm rmm^^^^^-Rm rmm^^^^-Rm rmm^^^^^^-Rm rmm^-rm rmm. 20与$ \ rm e^+e^ - $碰撞相比，其显着性约为4 $σ$。
The inclusive production of the charm-strange baryon $\rm Ω_c^0$ is measured for the first time via its hadronic decay into $\rm Ω^-π^+$ at midrapidity ($|y|<0.5$) in proton-proton (pp) collisions at the centre-of-mass energy $\sqrt{s}=13$ TeV with the ALICE detector at the LHC. The transverse momentum ($p_{\rm T}$) differential cross section multiplied by the branching ratio is presented in the interval $2<p_{\rm T}<12~{\rm GeV}/c$. The $p_{\rm T}$ dependence of the $\rm Ω_c^0$-baryon production relative to the prompt $\rm D^0$-meson and to the prompt $\rm Ξ_c^0$-baryon production is compared to various models that take different hadronisation mechanisms into consideration. In the measured $p_{\rm T}$ interval, the ratio of the $p_{\rm T}$-integrated cross sections of $\rm Ω_c^0$ and prompt $Λ_{\rm c}^{+}$ baryons multiplied by the $\rm Ω^-π^+$ branching ratio is found to be larger by a factor of about 20 with a significance of about 4$σ$ when compared to $\rm e^+e^-$ collisions.
