## Escape The City To Write A Phd Proposal

Strangeness (S), whole (the zero, positive or negatively quantum number characterizing hadrons. Strangeness of particles and antiparticles are opposite on a sign. Hadrons with S0 strange. The strangeness remains in strong and electromagnetic interactions, but is broken (on in weak interaction.

Barionny charge (barionny number) (B), one of internal characteristics of. At all of B = +1, and at their antiparticles of B =-1 (at other elementary particles of B =. The algebraic sum of barionny charges, the logging-in particles, remains at all interactions.

The particles participating in strong interaction. All (including nucleons - a proton and a neutron) and mezona belong to hadrons. Hadrons possess the quantum numbers remaining in processes of strong interaction: strangeness, charm, beauty, etc. Relatives on weight the hadrons having identical values of the specified quantum numbers and also barionny number and a back can be united in the isotopic multiplets including hadrons with various electric charges. The isotopic multiplets differing only in value of strangeness can be united, in turn, in more extensive groups of particles - supermultiplets of SU group (.

Characteristic time for which there are elementary processes caused by strong interactions makes 10-23 — 10-24 sec. Strong interactions possess high degree of symmetry; they are symmetric rather spatial inversion, charging interface, the address of time. Existence of internal simmetriya of hadrons is specific to strong interactions: the isotopic invariancy, symmetry in relation to phase transformation leading to existence of the special remaining quantum number — strangeness, and also SU (-symmetry.

Gravitational interactions, well-known on the macroscopic manifestations, in case of E. h. at characteristic distances ~ 10-13 cm give extremely small effects because of a trifle of mass of elementary particles.

Parity - the quantum number characterizing symmetry of wave function of physical system or an elementary particle at some discrete transformations: if at such transformation does not change a sign, parity is positive if changes, parity is negative. For absolutely neutral particles (or systems) which are identical to the antiparticles, except parity spatial, it is possible to enter concepts of charging parity and the combined parity (for other particles replacement with their antiparticles changes wave function).

the fascinated particles. This division is answered by existence at hadrons of special quantum numbers: strangenesses of S and a charm (English charm) of Ch with admissible values: 151 = 0, 1, 2, 3 and |Ch | = 0, 1, 2, For usual particles of S = 0 and Ch = 0, for strange particles of |S | ¹ 0, Ch = 0, for the fascinated |Ch particles | ¹ 0, and |S | = 0, 1, Instead of strangeness is often used quantum number Y hyper charge = by S + In, more fundamental value having, apparently.