Mar 2019
In particle physics, a hadron / hædrɒn /
Greek: ἁδρός, hadrós; "strong, thick"
is a composite particle made of two
or more quarks held together by strong
force in a manner similar to how molecules
are held together by the electromagnetic
force. Most of the mass of ordinary matter
comes from two hadrons, the proton
****** and the neutron. The quadrons
are classified into two families:
baryons, formed by an odd number of quarks,
usually three quarks, ****** and mesons,
formed by an even number of quarks,
usually a quark and an antiquark.
Protons ****** and neutrons are examples
of baryons; The pions are an example of an inn.
The "exotic" hadrons, which contain more
than three valence quarks, have been discovered
in recent years. A state of tetraquark an exotic inn,
called Z4430-, was discovered in 2007
by the Belle Collaboration and confirmed
as a resonance in 2014 by the LHCb collaboration.
In 2015, the collaboration of the LHCb discovered
two exotic pentaquark barons, called P + c4380
and P + c4450. There are several more exotic
hadron candidates, and other combinations of color
singlet quarks that may also exist. It is believed
that almost all "free" hadrons and antihadrons ie,
isolated and unbound within an atomic nucleus
are unstable and eventually decompose
into other particles. The only known exception
is related to free protons, which are possibly stable,
or at least, take immense amounts of time to decay
order of more than 1034. Free neutrons are unstable
and decompose with a half-life of about 611 seconds.
It is expected that their respective antiparticles
follow the same pattern, but are difficult to capture
****** and study, because they annihilate immediately
in contact with ordinary matter. The "bound" protons
and neutrons, contained within an atomic nucleus,
are generally considered stable Experimentally,
the physics of the hadron is studied
by the collision of protons or cores
of heavy elements such as lead or gold,
****** and the detection of waste in the uvias
of particles produced. In the environment,
mesons, like pions, are produced by the collisions
of cosmic rays with the atmosphere.
Greek: ἁδρός, hadrós; "strong, thick"
is a composite particle made of two
or more quarks held together by strong
force in a manner similar to how molecules
are held together by the electromagnetic
force. Most of the mass of ordinary matter
comes from two hadrons, the proton
****** and the neutron. The quadrons
are classified into two families:
baryons, formed by an odd number of quarks,
usually three quarks, ****** and mesons,
formed by an even number of quarks,
usually a quark and an antiquark.
Protons ****** and neutrons are examples
of baryons; The pions are an example of an inn.
The "exotic" hadrons, which contain more
than three valence quarks, have been discovered
in recent years. A state of tetraquark an exotic inn,
called Z4430-, was discovered in 2007
by the Belle Collaboration and confirmed
as a resonance in 2014 by the LHCb collaboration.
In 2015, the collaboration of the LHCb discovered
two exotic pentaquark barons, called P + c4380
and P + c4450. There are several more exotic
hadron candidates, and other combinations of color
singlet quarks that may also exist. It is believed
that almost all "free" hadrons and antihadrons ie,
isolated and unbound within an atomic nucleus
are unstable and eventually decompose
into other particles. The only known exception
is related to free protons, which are possibly stable,
or at least, take immense amounts of time to decay
order of more than 1034. Free neutrons are unstable
and decompose with a half-life of about 611 seconds.
It is expected that their respective antiparticles
follow the same pattern, but are difficult to capture
****** and study, because they annihilate immediately
in contact with ordinary matter. The "bound" protons
and neutrons, contained within an atomic nucleus,
are generally considered stable Experimentally,
the physics of the hadron is studied
by the collision of protons or cores
of heavy elements such as lead or gold,
****** and the detection of waste in the uvias
of particles produced. In the environment,
mesons, like pions, are produced by the collisions
of cosmic rays with the atmosphere.
