Excited Xi(b) Baryon - New Particle Discovered At LHC

Researchers have discovered a previously unknown particle composed of three quarks in the Large Hadron Collider (LHC) particle accelerator. The baryon known as Xi_b^* confirms fundamental assumptions of physics regarding the binding of quarks. The baryon family refers to particles that are made up of three quarks and quarks form a group of six particles that differ in their masses and charges. The two lightest quarks, “up” and “down” quarks, form the two atomic components, protons and neutrons. All baryons that are composed of the three lightest quarks (“up”, “down” and “strange” quarks) are known. Only very few baryons with heavy quarks have been observed to date. They can only be generated artificially in particle accelerators, as they are heavy and very unstable.  read more

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