Question 1

A muon is a

Accepted Answer

A)  baryon. 
B)  lepton. 
C)  hadron. 
D)  proton. 
A)  baryon. 
B)  lepton. 
C)  hadron. 
D)  proton.

Question 2

Which of the following particles does not take part in mediating the weak interaction?

Accepted Answer

A)  W+ 
B)  W− 
C)  π0 
D)  Z0 
E)  All these choices are involved in mediating the weak interaction. 
A)  W+ 
B)  W− 
C)  π0 
D)  Z0 
E)  All these choices are involved in mediating the weak interaction.

Question 3

Which of the following is not a color charge associated with the strong interaction?

Accepted Answer

A)  red 
B)  blue 
C)  yellow 
D)  green 
E)  All of these are color charges for the strong interaction. 
A)  red 
B)  blue 
C)  yellow 
D)  green 
E)  All of these are color charges for the strong interaction.

Question 4

The meson having which of the following quark contents has electric charge −e?

Accepted Answer

A)  b   
B)  c   
C)  c   
D)  d   
E)  u   
A)  b   
B)  c   
C)  c   
D)  d   
E)  u

Question 5

Quarks come in how many flavors?

Accepted Answer

A)  2 
B)  3 
C)  4 
D)  5 
E)  6 
A)  2 
B)  3 
C)  4 
D)  5 
E)  6

Question 6

The standard model does not include which interaction?

Accepted Answer

A)  electromagnetic 
B)  gravitational 
C)  weak 
D)  strong 
E)  It includes all of these choices. 
A)  electromagnetic 
B)  gravitational 
C)  weak 
D)  strong 
E)  It includes all of these choices.

Question 7

Quark flavors include

Accepted Answer

A)  up, down. 
B)  red, green. 
C)  muon, pion. 
D)  cyan, magenta. 
E)  lepton, gluon. 
A)  up, down. 
B)  red, green. 
C)  muon, pion. 
D)  cyan, magenta. 
E)  lepton, gluon.

Question 8

The baryon having which of the following quark contents is electrically neutral?

Accepted Answer

A)  dds 
B)  bbc 
C)  uud 
D)  ucs 
A)  dds 
B)  bbc 
C)  uud 
D)  ucs

Question 9

The quark structure of the neutron is

Accepted Answer

A)  uub 
B)  udb 
C)  udd 
D)  uds 
E)  uūd 
A)  uub 
B)  udb 
C)  udd 
D)  uds 
E)  uūd

Question 10

In addition to charge and baryon number, another conserved quantity in particle interactions is lepton number. The six leptons have lepton number +1, and their antiparticles have lepton number −1. The lepton numbers for each generation (electron, muon, tau) are separately conserved. For example, an electron has electron-lepton number +1, while the electron antineutrino has electron-lepton number −1. What is the missing particle X in the following decay? π+ → X + νμ

Accepted Answer

A)  μ− 
B)  μ0 
C)  π− 
D)  π0 
E)  μ+ 
A)  μ− 
B)  μ0 
C)  π− 
D)  π0 
E)  μ+

Question 11

The baryon having which of the following quark contents has electric charge −e?

Accepted Answer

A)  csd 
B)  dds 
C)  uud 
D)  bbc 
A)  csd 
B)  dds 
C)  uud 
D)  bbc

Question 12

In terms of e, what is the charge of a particle whose quark composition is uds?

Accepted Answer

A)  0 
B)  1 
C)  −1 
D)  2 
E)  −2 
A)  0 
B)  1 
C)  −1 
D)  2 
E)  −2

Question 13

The top quark has a mass of about 173 GeV/c2. What is its mass in atomic mass units?

Accepted Answer

A)  175 u 
B)  186 u 
C)  163 u 
D)  58 u 
E)  19 u 
A)  175 u 
B)  186 u 
C)  163 u 
D)  58 u 
E)  19 u

Question 14

In terms of e, the charge on a particle that has quark structure uus is

Accepted Answer

A)  0 
B)  1 
C)  −1 
D)  2/3 
E)  −4/3 
A)  0 
B)  1 
C)  −1 
D)  2/3 
E)  −4/3

Question 15

SLAC is an abbreviation for a

Accepted Answer

A)  linear accelerator. 
B)  synchrotron. 
C)  storage lane. 
D)  machine at Fermilab. 
E)  machine at CERN. 
A)  linear accelerator. 
B)  synchrotron. 
C)  storage lane. 
D)  machine at Fermilab. 
E)  machine at CERN.

Question 16

Ordinary matter contains only the following quarks

Accepted Answer

A)  strange and charm. 
B)  bottom and top. 
C)  up and down. 
D)  right and left. 
A)  strange and charm. 
B)  bottom and top. 
C)  up and down. 
D)  right and left.

Question 17

The meson having which of the following quark contents is electrically neutral?

Accepted Answer

A)  s   
B)  d   
C)  u   
D)  b   
E)  c   
A)  s   
B)  d   
C)  u   
D)  b   
E)  c

Question 18

Immediately after the Big Bang, how many types of interaction are there believed to have been?

Accepted Answer

A)  0 
B)  1 
C)  2 
D)  3 
E)  4 
A)  0 
B)  1 
C)  2 
D)  3 
E)  4

Exam 30: Particle Physics

A muon is a

Which of the following particles does not take part in mediating the weak interaction?

Which of the following is not a color charge associated with the strong interaction?

The meson having which of the following quark contents has electric charge −e?

Quarks come in how many flavors?

The standard model does not include which interaction?

Quark flavors include

The baryon having which of the following quark contents is electrically neutral?

The quark structure of the neutron is

The baryon having which of the following quark contents has electric charge −e?

In terms of e, what is the charge of a particle whose quark composition is uds?

The top quark has a mass of about 173 GeV/c2. What is its mass in atomic mass units?

In terms of e, the charge on a particle that has quark structure uus is

SLAC is an abbreviation for a

Ordinary matter contains only the following quarks

The meson having which of the following quark contents is electrically neutral?

Immediately after the Big Bang, how many types of interaction are there believed to have been?

Introduction

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The top quark has a mass of about 173 GeV/c². What is its mass in atomic mass units?