Measurement of neutral strange particle production in the underlying event in proton-proton collisions at s = 7 TeV
Measurement of neutral strange particle production in the underlying event in proton-proton collisions at s = 7 TeV
复制标题
测量 s = 7 TeV 质子-质子碰撞中潜在事件中中性奇异粒子的产生
DOI：
10.1103/physrevd.88.052001
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发表时间：
2013
影响因子：
5
通讯作者：
Chatrchyan S
中科院分区：
文献类型：
--
作者：
Chatrchyan S
Measurements are presented of the production of primaryandparticles in proton-proton collisions atin the region transverse to the leading charged-particle jet in each event. The average multiplicity and average scalar transverse momentum sum ofandparticles measured at pseudorapiditiesrise with increasing charged-particle jetin the rangeand saturate in the region. The rise and saturation of the strange-particle yields and transverse momentum sums in the underlying event are similar to those observed for inclusive charged particles, which confirms the impact-parameter picture of multiple parton interactions. The results are compared to recent tunes of thepythiaMonte Carlo event generator. Thepythiasimulations underestimate the data by 15%–30% formesons and by about 50% forbaryons, a deficit similar to that observed for the inclusive strange-particle production in non-single-diffractive proton-proton collisions. The constant strange- to charged-particle activity ratios with respect to the leading jetand similar trends for mesons and baryons indicate that the multiparton-interaction dynamics is decoupled from parton hadronization, which occurs at a later stage.
