论文标题
$ \ sqrt {s} $ = 13 tev和p-pb碰撞$ \ sqrt {s _ {\ rm nn}} $ = 8.16 tev at a al lhc colltions $ \ sqrt {s} $ \ sqrt {s _ {\ rm nn}} $ = 8.16 tev at a al lhc colltions $ \ sqrt {s} $ = 13 tev和p-pb碰撞的测量，以$ \ sqrt {s} $ \ sqrt {s} $ = 13 tev和p-pb碰撞的测量函数
Measurement of $ψ$(2S) production as a function of charged-particle pseudorapidity density in pp collisions at $\sqrt{s}$ = 13 TeV and p-Pb collisions at $\sqrt{s_{\rm NN}}$ = 8.16 TeV with ALICE at the LHC
论文作者
论文摘要
在PP碰撞中生产$ \ sqrt {s} $ = 13 tev和P-PB碰撞的PP碰撞中的charmonia，每核对$ \ sqrt {s _ {\ rm nn}} $ = 8.16 tev a a ial Al Al Al Al Al Al Al of Chord Persepartice Psseudorapity的函数研究。地面和激发的炭状态（j/$ψ$，$ψ$（2s））是根据dimuon衰减的质量衰减的，在质量中心框架$ 2.5 <y _ _ {\ rm cms} <4.0 $的pp碰撞中，$ 2.03 <y _ _ _ _ _ _ _ {\ rm cms} <3.53 $ \ y \ y \ y \ y \ y \ y \ y \ y \ y \ y \ y \ y \ y \ y \ y \ ym。 P -PB碰撞的CMS} <-2.96 $。带电粒子的假性密度在中期（$ |η| <1.0 $）左右测量。在PP碰撞中，测得的带电粒子多重性扩展到平均值的六倍，而在向前（向后）速度的P-PB碰撞中，多重性对应于达到平均值的三（四）倍。 $ψ$（2s）的产量随着带电的颗粒假性密度而增加。 $ψ$（2s）比J/$ψ$收益率的比率在任何一个碰撞系统中都没有显示出很大的多重性依赖性，这表明与带电的Pseudorapity pseudorapity密度相比，J/$ $ψ$和$ψ$（2s）产量的类似行为。 $ψ$（2s）的结果及其相对于J/$ψ$的比率与可用的模型计算一致。
Production of inclusive charmonia in pp collisions at center-of-mass energy of $\sqrt{s}$ = 13 TeV and p-Pb collisions at center-of-mass energy per nucleon pair of $\sqrt{s_{\rm NN}}$ = 8.16 TeV is studied as a function of charged-particle pseudorapidity density with ALICE. Ground and excited charmonium states (J/$ψ$, $ψ$(2S)) are measured from their dimuon decays in the interval of rapidity in the center-of-mass frame $2.5 < y_{\rm cms} < 4.0$ for pp collisions, and $2.03 < y_{\rm cms} < 3.53$ and $-4.46 < y_{\rm cms} < -2.96$ for p-Pb collisions. The charged-particle pseudorapidity density is measured around midrapidity ($|η|<1.0$). In pp collisions, the measured charged-particle multiplicity extends to about six times the average value, while in p-Pb collisions at forward (backward) rapidity a multiplicity corresponding to about three (four) times the average is reached. The $ψ$(2S) yield increases with the charged-particle pseudorapidity density. The ratio of $ψ$(2S) over J/$ψ$ yield does not show a significant multiplicity dependence in either colliding system, suggesting a similar behavior of J/$ψ$ and $ψ$(2S) yields with respect to charged-particle pseudorapidity density. Results for the $ψ$(2S) yield and its ratio with respect to J/$ψ$ agree with available model calculations.
