论文标题
在LHC上搜索高型PP碰撞中的常见Baryon源
Search for a common baryon source in high-multiplicity pp collisions at the LHC
论文作者
论文摘要
我们报告了来自与爱丽丝的两种巴里元相关性的粒子发射源的大小的测量值，在$ \ sqrt {s} $ = 13 tev时，在高质量pp碰撞中测量了粒子发射源。对源半径进行了低相对动量P-p的研究，$ \ bar {\ rm {p}} $ - $ \ bar {\ rm {p}} $，p- $λ$和$ \ bar {\ bar {\ rm {p}} $ - $ \barλ$ pairs $ pairs $ pairs $ pairs $ mm mm {第一次以一种定量的方式，强共振衰减的效果。校正了这种效果后，针对成对的不同粒子物种提取的半径一致。这表明质子，抗蛋白酶，$λ$和$ \barλ$源自同一来源。在测得的$ m _ {\ rm {t}} $ range（1.1-2.2）gev/$ c^{2} $此通用源的不变半径在0.85和1.3 fm之间。这些结果为研究强烈的强体相互作用以及小型碰撞系统中的集体特性的研究提供了精确的参考。
We report on the measurement of the size of the particle-emitting source from two-baryon correlations with ALICE in high-multiplicity pp collisions at $\sqrt{s}$ = 13 TeV. The source radius is studied with low relative momentum p-p, $\bar{\rm{p}}$-$\bar{\rm{p}}$, p-$Λ$ and $\bar{\rm{p}}$-$\barΛ$ pairs as a function of the pair transverse mass $m_{\rm{T}}$ considering for the first time in a quantitative way the effect of strong resonance decays. After correcting for this effect, the radii extracted for pairs of different particle species agree. This indicates that protons, antiprotons, $Λ$, and $\barΛ$ originate from the same source. Within the measured $m_{\rm{T}}$ range (1.1-2.2) GeV/$c^{2}$ the invariant radius of this common source varies between 0.85 and 1.3 fm. These results provide a precise reference for studies of the strong hadron-hadron interactions and for the investigation of collective properties in small colliding systems.
