Q29) CERN announced discovery of the exotic subatomic particles pentaquarks which so far had existed in theory only. Which of the following statements is/are true about the below mentioned particles?
1) Pentaquark is a sub-atomic particle composed of five-quarks (four antiquarks and a quark).
2) A baryon is a composite subatomic particle made up of three quarks
3) Mesons are composed of one quark and one antiquark
4) Leptons are not quark-based
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Q29) CERN announced discovery of the exotic subatomic particles pentaquarks which so far had existed in theory only. Which of the following statements is/are true about the below mentioned particles?
1) Pentaquark is a sub-atomic particle composed of five-quarks (four antiquarks and a quark).
2) A baryon is a composite subatomic particle made up of three quarks
3) Mesons are composed of one quark and one antiquark
4) Leptons are not quark-based
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The correct option is B Only 2, 3&4
Ans:29)(b) Baryons and mesons belong to the hadron family of particles, which are the quark-based particles.As quark-based particles, baryons
participate in the strong interaction, whereas leptons, which are not quark-based, do not. The most familiar baryons are the protons and neutrons that make up most of the mass of the visible matter in the universe. Electrons(the other major component of the atom) are leptons.
Each baryon has a corresponding antiparticle (antibaryon) where quarks are replaced by their corresponding antiquarks. For example, a proton is made of two up quarks and one down quark; and its corresponding antiparticle, the antiproton, is made of two up antiquarks and one down antiquark.
Pentaquark is a sub-atomic particle composed of five-quarks (four quarks and an antiquark). These are not new particles but simply aggregation of quarks, the fundamental constituents of ordinary protons and neutrons, similar to baryons wherein protons and neutrons are made up of three quarks. The discovery amounting to new state of matter was made during Large Hadron Collider beauty (LHCb) experiment at LHC in CERN, Geneva.
Only 2, 3&4
Ans:29)(b) Baryons and mesons belong to the hadron family of particles, which are the quark-based particles.As quark-based particles, baryons
participate in the strong interaction, whereas leptons, which are not quark-based, do not. The most familiar baryons are the protons and neutrons that make up most of the mass of the visible matter in the universe. Electrons(the other major component of the atom) are leptons.
Each baryon has a corresponding antiparticle (antibaryon) where quarks are replaced by their corresponding antiquarks. For example, a proton is made of two up quarks and one down quark; and its corresponding antiparticle, the antiproton, is made of two up antiquarks and one down antiquark.
Pentaquark is a sub-atomic particle composed of five-quarks (four quarks and an antiquark). These are not new particles but simply aggregation of quarks, the fundamental constituents of ordinary protons and neutrons, similar to baryons wherein protons and neutrons are made up of three quarks. The discovery amounting to new state of matter was made during Large Hadron Collider beauty (LHCb) experiment at LHC in CERN, Geneva.
