Large Hadron Collider: Discovery of Xi-cc-plus Particle at CERN

The Large Hadron Collider(LHC) has discovered a new particle called Xi-cc-plus. 

• It is the 80th particle discovered by the LHC.

About Xi-cc-plus

• The Xi-cc-plus was observed in proton–proton collisions during the third run of the Large Hadron Collider and detected by the LHCb (Large Hadron Collider beauty) experiment.

• Mass: It is approximately four times heavier than a normal proton . This is because charm quarks are significantly more massive than up quarks.
• Electric Charge: It carries a positive charge, similar to a proton
• Extremely Unstable: The Xi-cc-plus is very unstable and exists for an incredibly short time before decaying into other, more stable particles.
• Lifespan: Its lifetime is less than one ten-millionth of a second (approximately 45 femtoseconds) . 
  • This makes it extremely difficult to detect.
• It contains two “charm” quarks and one “down” quark.
• It belongs to the family of heavy baryons.
  

Significance

• Exploring Exotic Hadrons: The findings will aid in the search for and study of more exotic states of matter, such as tetraquarks (four quarks) and pentaquarks (five quarks), pushing the boundaries of the Standard Model of particle physics
• Understanding the Strong Nuclear Force: By studying how these heavy quarks are bound, scientists can gain deeper insights into the strong force that holds the universe’s matter together

• Helpful in Understanding:
  • Quantum Mechanics: Scientists believe this discovery will help in better understanding the complex and unusual behavior of quantum mechanics.
  • Quantum chromodynamics: It will help theorists test models of quantum chromodynamics.
    • Quantum Chromodynamics is the theory that explains how quarks and gluons interact through the strong nuclear force.

About the Large Hadron Collider (LHC)

• The Large Hadron Collider (LHC) is the world’s most advanced and powerful particle accelerator, designed to explore the fundamental particles that form the basic building blocks of matter.
• It is operated by CERN.
• It enables high-energy proton and heavy-ion collisions to probe the structure of matter.

India’s Role in CERN-LHC Experiments

• Large Hadron Collider (LHC): Indian institutes like BARC (Mumbai) and RRCAT (Indore) contributed key components for cryogenics, superconducting magnets, beam instrumentation, Radio Frequency systems etc.
• Worldwide LHC Computing Grid (WLCG): WLCG is a global network that processes and analyses the vast data generated by LHC experiments.
  • India has contributed to software and tools used across the grid, such as GRIDVIEW (monitoring) and SHIVA (problem tracking).
• ALICE (A Large Ion Collider Experiment): India designed and constructed and commissioned ingeniously the Photon Multiplicity Detector (PMD) and Muon Spectrometer, vital for studies of quark gluon plasma.
  • India is also contributing to the p-type silicon-based Forward Calorimeter (FoCal) for precision photon and pion measurements at forward rapidities.
• CMS (Compact Muon Solenoid): Indian teams have led research in Higgs boson searches, top-quark and flavor physics, electroweak measurements, and supersymmetry.

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