Lhc hadron
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Understanding Hadron Interactions at the LHC
Introduction to Hadron Interactions at the LHC
The Large Hadron Collider (LHC) at CERN is the world's most powerful particle accelerator, designed to collide proton beams and heavy ions at unprecedented energies. This facility enables researchers to explore the fundamental interactions between hadrons, which are particles made of quarks held together by the strong force4.
Strong Interaction Dynamics Among Hadrons
One of the primary goals of nuclear physics is to understand the effective interaction between hadrons with different quark content. Recent advancements have been made using lattice QCD techniques, which solve the dynamics of quarks and gluons on discrete space-time lattices. However, experimental data on the strong interaction, especially for unstable hadrons, has been limited1.
At the LHC, researchers have developed a method to measure correlations in momentum space between hadron pairs produced in ultrarelativistic proton-proton collisions. This approach provides precise information on the interaction dynamics between any pair of unstable hadrons, such as baryons containing strange quarks (hyperons). By analyzing proton-omega baryon correlations, scientists can study the strong interaction with precision comparable to lattice calculations1.
Collective Hadronization in Proton-Proton Scattering
The EPOS LHC model, a Monte-Carlo event generator, has been updated to incorporate new data from LHC experiments. This model now includes a different parametrization of flow for proton-proton (p-p) scattering, which accounts for the high density of thermalized matter in small volumes. This adjustment allows the model to reproduce minimum bias results for all particles with transverse momentum from 0 to a few GeV/c, demonstrating the collective behavior of hadrons in p-p collisions2.
Gluon Saturation and Hadron Production
In high-density Quantum Chromodynamics (QCD), hadron production is understood to stem from the decay of mini jets with transverse momenta around the saturation scale. This concept successfully describes inclusive hadron production at various energies, including the first data from the LHC. Recent measurements from ALICE, CMS, and ATLAS experiments, such as inclusive charged-hadron transverse momentum and multiplicity distributions in proton-proton collisions, align well with this approach3.
Improved Models for Hadron Production
To better describe hadron production at LHC energies, researchers have modified the impact parameter dependent saturation model by including an anomalous dimension, γ. This modification controls the slope of the scattering amplitude during the transition from dilute to saturation regions. The improved model shows good consistency with LHC measurements, outperforming the original model by effectively suppressing the evolution of the scattering amplitude6 7.
Dihadron Production and BFKL Dynamics
The study of dihadron production at the LHC, where two hadrons with high transverse momenta are separated by a large rapidity interval, offers insights into the dynamics of hard proton-parton interactions. This process, similar to Mueller-Navelet jet production, can be analyzed using the Balitsky-Fadin-Kuraev-Lipatov (BFKL) formalism with next-to-leading logarithmic accuracy. Experimental studies of dihadron production provide a clear channel to test BFKL dynamics9.
Conclusion
The LHC has significantly advanced our understanding of hadron interactions through various innovative methods and models. From studying the strong interaction dynamics among hadrons to exploring collective hadronization and gluon saturation, the LHC continues to provide valuable insights into the fundamental forces governing particle interactions. These advancements not only enhance our theoretical models but also pave the way for future discoveries in particle physics.
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Most relevant research papers on this topic
Unveiling the strong interaction among hadrons at the LHC
The LHC's ultrarelativistic proton-proton collisions provide precise measurements of the strong interaction between unstable hadrons, enabling detailed determination of the short-range nucleon-hyperon interaction.
Rigorous Journal
Highly CitedEPOS LHC: Test of collective hadronization with data measured at the CERN Large Hadron Collider
EPOS LHC has been updated to reproduce new data from the Large Hadron Collider, improving its ability to reproduce minimum bias results for all particles with transverse momentum from 0 to a few GeV/c.
Highly CitedGluon saturation and inclusive hadron production at LHC
This paper presents a unique approach for explaining inclusive hadron production in high-density QCD, describing data from the LHC and HERA, and providing predictions for upcoming LHC measurements.
Highly CitedLHC Machine
The Large Hadron Collider (LHC) is a powerful tool for particle physics research, with a centre-of-mass energy of 14 TeV and a peak luminosity of 1034 cm2 s1.
Highly CitedThe LHCb detector at the LHC
The LHCb detector, aimed at measuring CP violation and rare decays of B hadrons, has shown promising performance in test beam measurements and simulation studies.
Highly CitedSingle inclusive hadron production at the LHC with an improved impact parameter dependent saturation model
The improved impact parameter dependent saturation model, including an anomalous dimension, better describes hadron production at the LHC than the original one, providing better consistency with experimental data.
Single inclusive hadron production at the LHC with an improved impact parameter dependent saturation model
The improved impact parameter dependent saturation model, which includes an anomalous dimension, is more consistent with experimental data than the original one, as it suppresses scattering amplitude evolution.
LHCb detector performance
The LHCb detector has met its design criteria and has produced a wide range of physics results, demonstrating its unique role as both a heavy flavour experiment and general purpose detector in the forward region.
Highly CitedHigh energy resummation in dihadron production at the LHC
Di-hadron production at the LHC can provide insights into hard proton-parton interactions and test the BFKL dynamics with next-to-leading logarithmic accuracy.
The LHCb detector at the LHC
The LHCb detector, designed to measure CP violation and rare decays of B hadrons, is expected to perform well in the Large Hadron Collider.
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