论文标题
$ {\ rm f} _ {0}（980）$在$ \ sqrt {s} = 5.02 $ tev中的弹性PP碰撞中的生产
${\rm f}_{0}(980)$ production in inelastic pp collisions at $\sqrt{s} = 5.02$ TeV
论文作者
论文摘要
$ {\ rm f} _ {0}（980）$ in弹性pp碰撞的生产的测量值为$ \ sqrt {s} = 5.02 $ tev。这是LHC Energies处的首次报告的包括$ {\ rm f} _ {0}（980）$的测量值。生产以中期为中心，$ | y | <0.5 $，在较宽的横向动量范围内，$ 0 <p _ {\ rm t} <16 $ gev/$ c $，通过在$ {\ rm f} _ {0}（980）\rightArrowπ^π^{+}π^{ - +}π^{ - } $ hadrice dictection中重新构造共鸣。将$ p _ {\ rm t} $ - 差异收益率与亲质，质子和$ ϕ $介子的差异收益率，以及来自Herwig 7.2 QCD启发的蒙特卡洛事件生成器的预测，以及使用AMPT模型作为输入的Coalencence模型的计算。将$ p _ {\ rm t} $的比率比较$ {\ rm f} _ {0} _ {0}（980）$相对于pions的比率与$ {\ rm e}^{+rm e}^{+} {\ rm e}^{\ rm e}^{ - } $ pp collisiation和pp collisiation的测量值进行了比较。 $ {\ rm f} _ {0}（980）$对pp collisions从SPS到LHC Energies中观察到$ {\ rm f} _ {0}（980）$的轻度碰撞能量依赖性。所有被考虑的模型低估了$ p _ {\ rm t} $ - 集成$ 2 {\ rm f} _ {0}（980）/（π^{+}+π^{ - }）$比率。从规范统计强调模型中的预测，假设零总的陌生内容为$ {\ rm f} _ {0}（980）$与1.9 $σ$内的数据一致，并且是最接近数据的数据。结果为未来测量粒子产量和核修饰的核修饰提供了必不可少的参考，这已提议为探测$ {\ rm f} _ {0} _ {0}（980）$ scalar meson的难以捉摸的性质和夸克组成而有用。
The measurement of the production of ${\rm f}_{0}(980)$ in inelastic pp collisions at $\sqrt{s} = 5.02$ TeV is presented. This is the first reported measurement of inclusive ${\rm f}_{0}(980)$ yield at LHC energies. The production is measured at midrapidity, $|y| < 0.5$, in a wide transverse momentum range, $0 < p_{\rm T} < 16$ GeV/$c$, by reconstructing the resonance in the ${\rm f}_{0}(980) \rightarrow π^{+}π^{-}$ hadronic decay channel using the ALICE detector. The $p_{\rm T}$-differential yields are compared to those of pions, protons and $ϕ$ mesons as well as to predictions from the HERWIG 7.2 QCD-inspired Monte Carlo event generator and calculations from a coalescence model that uses the AMPT model as an input. The ratio of the $p_{\rm T}$-integrated yield of ${\rm f}_{0}(980)$ relative to pions is compared to measurements in ${\rm e}^{+}{\rm e}^{-}$ and pp collisions at lower energies and predictions from statistical hadronisation models and HERWIG 7.2. A mild collision energy dependence of the ${\rm f}_{0}(980)$ to pion production is observed in pp collisions from SPS to LHC energies. All considered models underpredict the $p_{\rm T}$-integrated $2{\rm f}_{0}(980)/(π^{+}+π^{-})$ ratio. The prediction from the canonical statistical hadronisation model assuming a zero total strangeness content of ${\rm f}_{0}(980)$ is consistent with the data within 1.9$σ$ and is the closest to the data. The results provide an essential reference for future measurements of the particle yield and nuclear modification in p$-$Pb and Pb$-$Pb collisions, which have been proposed to be instrumental to probe the elusive nature and quark composition of the ${\rm f}_{0}(980)$ scalar meson.
