Book edition 10th Edition

Author(s) David Halliday

Pages 1328 pages

ISBN 9781118230718

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Short Answer

Consider the neutrino whose symbol is $\bar{ν_{τ}}$ . (a) Is it a quark, a
lepton, a meson, or a baryon? (b) Is it a particle or an antiparticle? (c) Is it a boson or a fermion? (d) Is it stable against spontaneous decay?

(a) It is a neutrino which is unchanged leptons therefore this is a lepton.

(b) neutrinos have a positive charge therefore it is an antiparticle.

(d) Yes, it is stable against spontaneous decay.

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Step by Step Solution

TABLE OF CONTENTS :

TABLE OF CONTENTS

Step 1: Concept used to solve the question

Properties of Leptons

Three of the leptons (electron, muon, and tauon) have an electric charge equal to -1e .
There are also three uncharged neutrinos (also leptons), one corresponding to each of the charged leptons.
The antiparticles for the charged leptons have a positive charge.
lepton has half-integer spin quantum numbers.

Step 2:(a) Finding the neutrino Is it a quark, a lepton, a meson, or a baryon

Given neutrino is $\bar{ν_{τ}}$

Since it is a neutrino which is unchanged leptons therefore this is a lepton.

Step 3:(b) Finding the neutrino Is a particle or antiparticle

We know that leptons have an electric charge equal to -1e and uncharged leptons (neutrinos), one corresponding to each of the charged leptons. The antiparticles for the charged leptons have a positive charge.

Step 4:(c) Finding the neutrino Is a particle or antiparticle

We know If the spin is a one-half integer, then the particle is a fermion. If the spin is an integer, such as zero or one or two, then the particle is a boson.

Since the antiparticle is a lepton that has a 1/2 spin therefore the particle is a fermion.

Step 5:(d) Finding stability

Since it is a lepton which is a fundamental particle, and all the fundamental particles are light and stable they cannot interact by any strong force. So, it is stable against spontaneous decay.

Hence, yes, it is stable against spontaneous decay.

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Fundamentals Of Physics

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Short Answer

Consider the neutrino whose symbol is $\bar{ν_{τ}}$ . (a) Is it a quark, a
lepton, a meson, or a baryon? (b) Is it a particle or an antiparticle? (c) Is it a boson or a fermion? (d) Is it stable against spontaneous decay?

Step by Step Solution

Step 1: Concept used to solve the question

Step 2:(a) Finding the neutrino Is it a quark, a lepton, a meson, or a baryon

Step 3:(b) Finding the neutrino Is a particle or antiparticle

Step 4:(c) Finding the neutrino Is a particle or antiparticle

Step 5:(d) Finding stability

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Fundamentals Of Physics

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Short Answer

Consider the neutrino whose symbol is ντ¯ . (a) Is it a quark, alepton, a meson, or a baryon? (b) Is it a particle or an antiparticle? (c) Is it a boson or a fermion? (d) Is it stable against spontaneous decay?

Step by Step Solution

Step 1: Concept used to solve the question

Step 2:(a) Finding the neutrino Is it a quark, a lepton, a meson, or a baryon

Step 3:(b) Finding the neutrino Is a particle or antiparticle

Step 4:(c) Finding the neutrino Is a particle or antiparticle

Step 5:(d) Finding stability

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Consider the neutrino whose symbol is $\bar{ν_{τ}}$ . (a) Is it a quark, a
lepton, a meson, or a baryon? (b) Is it a particle or an antiparticle? (c) Is it a boson or a fermion? (d) Is it stable against spontaneous decay?