Definition/Description. Trapezius Myalgia is chronic pain of the upper trapezius muscle, most frequent is neck pain. It is a complex and multifactorial condition. Musculoskeletal pain is often intensifying by mental and social stress at home or work.
A hadron, in particle physics, is any subatomic (smaller than the atom) particle or antiparticle which is made of quarks. Quarks are fundamental particles which among other properties have an electrical charge and a name (e.g. 'up', 'down', 'strange'). The electrical charge of a single quark is always a fraction (e.g. 2/3).
Thus, if hadrons are struck by high-energy particles, they give rise to new hadrons instead of emitting freely moving radiation (gluons). This property of the strong force is called colour confinement, and it prevents the free emission of the strong force: instead, in practice, jets of massive particles are observed.