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Chapter 33: Q24CQ (page 1213)

(a) Do all particles having strangeness also have at least one strange quark in them?

(b) Do all hadrons with a strange quark also have nonzero strangeness?

Short Answer

Expert verified
  1. Yes, all particles having strangeness also have at least one strange quark in them.

b. No, not all hadrons have a strange quark with nonzero strangeness.

Step by step solution

01

Definition of Concept

Quarks are considered as the fundamental type of particles, initially it was considered that only three types of quarks are present. Each flavor of quark has its own characteristics like charge, spin, strangeness etc.

02

Explain all particles having strangeness also have at least one strange quark in them

(a)

Yes, all particles with strangeness contain at least one strange quark. Strangeness, according to the Strangeness Theory, is the property possessed by particles containing at least one strange quark. As a result, there can be no strange particles if there are no strange quarks in them.

Therefore, yes, all particles with strangeness contain at least one strange quark.

03

Explain all hadrons with a strange quark also have nonzero strangeness

(b)

No, not all hadrons have a strange quark with a strangeness of nonzero. Only the strange quark can have a non-zero strangeness, whereas mesons, protons, and nucleons have zero strangeness because they are made up of an up quark, a down quark, and a no strange quark, which is also known as a sideway quark. Baryons are hadrons as well, but they have positive and negative strangeness due to up and down spin.

Therefore, no, not every hadron has a strange quark with a nonzero strangeness.

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Most popular questions from this chapter

Is the decay \({{\rm{\mu }}^{\rm{ - }}} \to {{\rm{e}}^{\rm{ - }}}{\rm{ + }}{{\rm{\nu }}_{\rm{e}}}{\rm{ + }}{{\rm{\nu }}_{\rm{\mu }}}\)possible considering the appropriate conservation laws? State why or why not.

Suppose a \[{{\rm{W}}^{\rm{ - }}}\]created in a bubble chamber lives for \[{\rm{5}}{\rm{.00 \times 1}}{{\rm{0}}^{{\rm{ - 25}}}}{\rm{\;s}}\]. What distance does it move in this time if it is traveling at \[{\rm{0}}{\rm{.900c}}\]? Since this distance is too short to make a track, the presence of the \[{{\rm{W}}^{\rm{ - }}}\]must be inferred from its decay products. Note that the time is longer than the given \[{{\rm{W}}^{\rm{ - }}}\]lifetime, which can be due to the statistical nature of decay or time dilation.

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(a) What is the change in strangeness?

(b) Verify that baryon number and charge are conserved, while lepton numbers are unaffected.

(c) Write the equation in terms of the constituent quarks, indicating that the weak force is responsible.

There are particles called \({\rm{D}}\)-mesons. One of them is the \({{\rm{D}}^{\rm{ + }}}\) meson, which has a single positive charge and a baryon number of zero, also the value of its strangeness, topness, and bottomness. It has a charm of \({\rm{ + 1}}\). What is its quark configuration?

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