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In a beam of charged particles created by a heated cathode, the particles move at different speeds. However, many applications need a beam with uniform particle speeds. An arrangement known as a velocity selector uses electric and magnetic fields to pick particles with a particular speed from the beam.
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The elements in groups of the periodic table exhibit similar chemical behavior. This similarity occurs because the members of a group have the same number and distribution of electrons in their valence shells.
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Near absolute zero temperatures, in the presence of a magnetic field, the majority of nuclei prefer the lower energy spin-up state to the higher energy spin-down state. As temperatures increase, the energy from thermal collisions distributes the spins more equally between the two states. The Boltzmann distribution equation gives the ratio of the number of spins predicted in the spin −½ (N−) and spin +½ (N+) states.
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Correlation means that there is a relationship between two or more variables (such as ice cream consumption and crime), but this relationship does not necessarily imply cause and effect. When two variables are correlated, it simply means that as one variable changes, so does the other. We can measure correlation by calculating a statistic known as a correlation coefficient. A correlation coefficient is a number from -1 to +1 that indicates the strength and direction of the relationship between...
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Setting Limits on Supersymmetry Using Simplified Models
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Baryon correlations in Pythia.

Leif Lönnblad1, Harsh Shah1

  • 1Department of Physics, Lund University, Sölvegatan 14A, 223 62 Lund, Sweden.

The European Physical Journal. C, Particles and Fields
|December 7, 2023
PubMed
Summary

This study explores baryon pair angular correlations using Pythia8, revealing how color reconnection and hadronization impact these patterns. Gluon effects in the Lund model are analyzed, proposing a hypothesis for baryon suppression in gluon jets.

Area of Science:

  • High Energy Physics
  • Particle Physics
  • Quantum Chromodynamics

Background:

  • Baryon production and angular correlations are crucial for understanding particle interactions.
  • Existing models like Pythia8 provide frameworks for simulating these events.
  • The influence of gluons and hadronization mechanisms on baryon correlations requires further investigation.

Purpose of the Study:

  • To investigate angular correlations between baryon pairs using the Pythia8 event generator.
  • To analyze the impact of color reconnection models and hadronization mechanisms on these correlations.
  • To explore the role of gluons in baryon production within the Lund string fragmentation model.

Main Methods:

  • Utilizing the Pythia8 event generator for simulations.

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  • Analyzing angular correlations between baryon pairs.
  • Comparing theoretical predictions with ALICE collision results.

    • Main Results:

    • Color reconnection and hadronization mechanisms significantly influence baryon pair angular correlations.
    • Gluons play a notable role in the baryon production mechanism within the Lund string fragmentation model.
    • A hypothesis for suppressing baryons produced in gluon jets was proposed and its potential influence on angular correlations was demonstrated.

    Conclusions:

    • The study provides insights into the theoretical underpinnings of baryon angular correlations.
    • The findings offer a basis for comparison with experimental data, such as that from ALICE.
    • The proposed hypothesis regarding baryon suppression in gluon jets warrants further theoretical and experimental validation.