Effects of overlapping strings in pp collisions

被引：151

作者：

Bierlich, Christian ^{[1
]}

Gustafson, Gosta ^{[1
]}

Lonnblad, Leif ^{[1
]}

Tarasov, Andrey ^{[2
]}

机构：

[1] Lund Univ, Dept Astron & Theoret Phys, Lund, Sweden

[2] Jefferson Lab, Ctr Theory, Newport News, VA USA

来源：

JOURNAL OF HIGH ENERGY PHYSICS | 2015年 / 03期

基金：

瑞典研究理事会;

关键词：

QCD Phenomenology; Monte Carlo Simulations; GLUON DISTRIBUTION-FUNCTIONS; FLUX-TUBE MODEL; PAIR PRODUCTION; BARYON PRODUCTION; COLOR ROPE; PARTICLE-PRODUCTION; BFKL POMERON; QUARK; PARTON; ENERGY;

D O I：

10.1007/JHEP03(2015)148

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

In models for hadron collisions based on string hadronization, the strings are usually treated as independent, allowing no interaction between the confined colour fields. In studies of nucleus collisions it has been suggested that strings close in space can fuse to form "colour ropes". Such ropes are expected to give more strange particles and baryons, which also has been suggested as a signal for plasma formation. Overlapping strings can also be expected in pp collisions, where usually no phase transition is expected. In particular at the high LHC energies the expected density of strings is quite high. To investigate possible effects of rope formation, we present a model in which strings are allowed to combine into higher multiplets, giving rise to increased production of baryons and strangeness, or recombine into singlet structures and vanish. Also a crude model for strings recombining into junction structures is considered, again giving rise to increased baryon production. The models are implemented in the dipsy MC event generator, using Pythia8 for hadronization, and comparison to pp minimum bias data, reveals improvement in the description of identified particle spectra.

引用

页数：49

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