LHC Physicists Unveil a Charming New Particle
Physicists using the experience of the Large Beauty Hatcher Collider (LHCb) at CERN in Geneva, Switzerland, have discovered a new type of heavy particles, they announced this week at a conference in Venice.
The particle, known as Xi-cc ++ (pronounced “ksi-CC plus-plus”), consisted of three small elementary particles called quark, in particular a “high” quark lighter than those found in protons and neutrons and two “Charm” quarks, which are the heaviest and most exotic variety.
(The terms “high” and “charm” are two of the six physical ‘models’ assigned to the quarks of masses and particles of varying charges).
The standard model of particle physics predicts Xi-DC ++ and many other possible particles with various configurations of the six known quarks flavors. But so far, such “doubly Haunted” particles had escaped conclusive detection.
Other studies of the new particle – and other members of the doubly enchanted particle family – could either strengthen the standard model or lead to new opportunities in particle physics.
Anyway, the new particle could be a tool to unlock a deeper understanding of the fundamental “strong” force that binds quarks together to form protons and neutrons, which in turn form atoms, planets, stars, galaxies, and people.
Any particles made from quarks are called hadrons. The world’s largest and most powerful particle accelerator, the Large Hadron Collider at CERN (LHC), these particles flow together in search of new particles and interactions.
The hadrons are divided into two large families: mesons, exotic particles with a quark and an antiquark; And baryons, particles composed of three quarks. The new Xi-cc of particles ++ is a baryone.
But because of its doubly enchanting character, it is almost four times heavier than the most well-known baryons, such as protons and neutrons, which are composed entirely of light quarks instead of heavy ones.
“Finding a doubly heavy quark baryon is of great interest as it will provide a unique tool to delve into QCD quantum chromodynamics  – the theory that describes strong force, one of the four fundamental forces,” spokesman LHCb spokesman Giovanni Passaleva Said in a statement. “Such particles will help us improve the predictive power of our theories.”
Quark quill quills in protons and neutrons glide evenly around each other at almost the speed of light, which makes them very difficult to study. In a particle Xi-cc ++, the only high-speed quark light to beat around the heavier and slower heavy quark pair, creating an easier situation for doctors to investigate.
The situation, according to former LHCb spokesman and physicist Guy Wilkinson of Oxford University, is more or less analogous to a planetary system in which the light quark like a planet in orbit around a little star of massive stars.
Directed by Glasgow University physicist Patrick Spradlin, the LHCb team found evidence of more than 300 new particles in the data collected last year by experience, devastating their signals from a dense forest more common particles produced by proton collisions Of high energy in LHC.
Specifically, they sought a revealing particle “daughter” distribution, including other baryons and exotic kaone particles and pions produced by the decomposition of short X-DC ++ particles.
Observed distributions not only show that LHC collisions produce X-DC ++ particles, but they also highlight the other demands of other researchers investigators