Hadrones leptones y quarks pdf

Leptons, quarks and hadrons leptons are spin12 fermions, not subject to strong interaction electron e, muon. Dec 18, 2015 for the love of physics walter lewin may 16, 2011 duration. Quarks and leptons are two categories of the elementary particles and taken together, known as fermions. To recover the observed electric charges for all particles, the lefthanded weak isospin doublet. Difference between leptons and hadrons compare the. The quarks combine through strong nuclear interaction to form hadrons. The fermion mass hierarchy is addresed from the framework of an abelian extension of the standard model u1x. Neutrinos have very small masses were thought to be massless. Quark model hadrons isospin, strangeness quark model 3 flavours u, d, s mesons pseudoscalar and vector mesons baryons decuplet, octet hadron masses spinspin coupling heavy quarks charm, bottom, heavy quark mesons top quark motivation for quark model particle zoo proliferates the finder of a new particle used to be rewarded. Indeed, the simplicity of their gauge interactions makes quarks and leptons look convincingly elementary. Although individual quarks have fractional electrical charges, they combine such that hadrons have a net integer electric charge. What, then, encourages physicists to take the notion of their cornpositeness seriously. Strange and bottom quarks are increasingly more massive versions of the down quark.

The scalar potential is shown, together with the scalar spectrum of the model which includes the respective goldstone. It is an accidental consequence of the small mass of the three lightest quarks. The first is the observed proliferation of quarks and leptons. If quarks and leptons are made of constituents, then at the scale of. Like social elephants, quarks only exist in groups with other quarks and are never found alone. Protones, neutrones, quarks electrones leptones,rayos. The interaction of the leptons with the massive weak interaction vector bosons is shown in the figure on the right. Pero eran quarks, antiquarks y gluones y podria haber dicho eso. Diametro medio del nucleo atomico intensidad relativa 1038 102 106 1.

Properties of quarks symbol relative mass charge proton 1 baryon number strangeness. There are also six corresponding antiquarks antiup, antidown etc. By taking into account the cancellation of chiral anomalies, a set of u1x charges is presented with extended scalar and fermionic sectors. Baryons consists of three quarks qqq bound with strong force, and antibaryons are three anti quarks bound. Protones, electrones, neutrones, fotones, quarks y leptones. The charge of each antiquark is exactly the opposite of the. Only knowledge of the up, down and strange quarks is required for as physics. Another property of hadrons is that they have no net color charge even. Quarks and hadrons antiquarks have electric charges which are opposite to their partner quarks, they also have \opposite color. What is the difference between hadrons and leptons.