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Resonance suppression from color reconnection

كبت الرنين من إعادة توصيل اللون
Authors: R. Acconcia; David Dobrigkeit Chinellato; Rafael Derradi de Souza; Jun Takahashi; Giorgio Torrieri; C. Markert;

Resonance suppression from color reconnection

Abstract

Nous présentons des études qui montrent comment l'interaction multiparton et la reconnexion des couleurs affectent la hadrochimie dans les collisions proton-proton (pp) avec un accent particulier sur la production de résonances à l'aide du générateur d'événements PYTHIA8. Nous trouvons que la reconnexion des couleurs supprime la production relative de résonances mésoniques telles que $ \rho_{0}$ et K*, fournissant une explication alternative à la diminution de K*/K observée dans les collisions proton-proton en fonction de la multiplicité par la collaboration ALICE. Des études détaillées du mécanisme sous-jacent provoquant la suppression de la résonance mésonique indiquent que la reconnexion des couleurs conduit à des chaînes plus courtes et moins énergétiques dont la fragmentation est moins susceptible de produire des hadrons plus massifs pour une teneur en quarks donnée, réduisant ainsi les rapports tels que K*/K et $ \rho_0/\pi$ dans les collisions pp à haute multiplicité. De plus, nous avons également étudié les effets de la formation de jonctions de cordes et avons constaté que celles-ci peuvent également contribuer à la suppression de la résonance.

Presentamos estudios que muestran cómo la interacción multipartón y la reconexión del color afectan la hadroquímica en las colisiones protón-protón (pp) con especial énfasis en la producción de resonancias utilizando el generador de eventos PYTHIA8. Encontramos que la reconexión de color suprime la producción relativa de resonancias mesónicas como $\rho_{0}$ y K*, proporcionando una explicación alternativa para la disminución K*/K observada en las colisiones protón-protón en función de la multiplicidad por la colaboración ALICE. Los estudios detallados del mecanismo subyacente que causa la supresión de la resonancia de los mesones indican que la reconexión del color conduce a cuerdas más cortas y menos energéticas cuya fragmentación es menos probable que produzca hadrones más masivos para un contenido de quarks dado, lo que reduce relaciones como K*/K y $\rho_0/\pi$ en colisiones de pp de alta multiplicidad. Además, también hemos estudiado los efectos de permitir que se formen uniones de cuerdas y encontramos que estas también pueden contribuir a la supresión de la resonancia.

We present studies that show how multi-parton interaction and color reconnection affect the hadro-chemistry in proton-proton (pp) collisions with special focus on the production of resonances using the PYTHIA8 event generator. We find that color reconnection suppresses the relative production of meson resonances such as $\rho_{0}$ and K*, providing an alternative explanation for the K*/K decrease observed in proton-proton collisions as a function of multiplicity by the ALICE collaboration. Detailed studies of the underlying mechanism causing meson resonance suppression indicate that color reconnection leads to shorter, less energetic strings whose fragmentation is less likely to produce more massive hadrons for a given quark content, therefore reducing ratios such as K*/K and $\rho_0/\pi$ in high-multiplicity pp collisions. In addition, we have also studied the effects of allowing string junctions to form and found that these may also contribute to resonance suppression.

نقدم دراسات توضح كيف يؤثر التفاعل متعدد الأجزاء وإعادة الاتصال اللوني على كيمياء الهاردو في تصادمات البروتون والبروتون (PP) مع التركيز بشكل خاص على إنتاج الرنين باستخدام مولد أحداث PYTHIA8. نجد أن إعادة توصيل الألوان تمنع الإنتاج النسبي لرنين الميزون مثل $\rho _{ 0 }$ و K*، مما يوفر تفسيرًا بديلاً لانخفاض K*/K الملحوظ في تصادمات البروتون والبروتون كدالة للتعدد من خلال تعاون أليس. تشير الدراسات التفصيلية للآلية الأساسية التي تسبب كبت رنين الميزون إلى أن إعادة توصيل اللون تؤدي إلى سلاسل أقصر وأقل نشاطًا يكون تجزؤها أقل عرضة لإنتاج المزيد من الهادرونات الضخمة لمحتوى كوارك معين، وبالتالي تقليل النسب مثل K*/K و $\rho _0 /\pi$ في تصادمات PP عالية التعدد. بالإضافة إلى ذلك، درسنا أيضًا تأثيرات السماح بتكوين تقاطعات الأوتار ووجدنا أنها قد تساهم أيضًا في كبت الرنين.

Keywords

Nuclear and High Energy Physics, Nuclear physics, Fragmentation (computing), Search for Quark-Gluon Plasma in Heavy-Ion Collisions, Resonance, Mathematical analysis, Resonance (particle physics), FOS: Mathematics, Particle Physics and High-Energy Collider Experiments, Parton, Physics, Hadron Physics and QCD, Particle physics, Meson, Computer science, Operating system, Multiplicity (mathematics), Physics and Astronomy, Hadron, Physical Sciences, Quark, Proton, Event generator, Mathematics, Hadronization

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
5
Top 10%
Average
Average
Green
hybrid
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