A quark star is a hypothetical star that forms when a star that is too big to form a neutron star but less than a black hole collapses the neutrons slightly into their component particles.
Quarks's
They hang out at Quark's bar. Don't you watch Star Trek.
Hypothetically, it would be a star made of up quarks. This is not exactly theoretically forbidden, but it's extremely unlikely.
If a quark star were to collide with a black hole, several outcomes are possible depending on the mass and velocity of the objects. Potential scenarios include the quark star being devoured by the black hole, leading to an increase in the black hole's mass, or a violent event such as the emission of gravitational waves and high-energy particles. These collisions are complex phenomena that are still being studied by scientists.
An antibottom quark (or b-bar quark) is the antiparticle of a bottom quark. It has the same mass as a bottom quark but opposite electric charge and other quantum numbers. When a bottom quark meets an antibottom quark, they can annihilate each other and produce energy.
By after, I assume you mean the neutron star's mass being high enough for gravity to overcome neutron degeneracy pressure. The direct next step is (theoretically) a quark star, which is a stellar remnant composed of mostly quark degenerate matter exerting an outward force, halting collapse. However, none have been discovered to date.
Quark.
Neutral pions are composed of a quark-antiquark pair, specifically an up quark and an anti-up quark or a down quark and an anti-down quark. They are the lightest mesons and are unstable, decaying rapidly into two photons.
quark quark
Quark CopyDesk was created in 1991.
An anti-down quark is the antimatter counterpart of a down quark, one of the elementary particles that make up protons and neutrons in the atomic nucleus. It has opposite electric charge to a down quark and can combine with other quarks to form antimatter particles.
Quark Pharmaceuticals was created in 1993.