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Particle Physics Questions : Multiple Choice

Q11.

A CERN detector shows a signal only in the hadronic calorimeter. No signal is observed in the in the tracker, electromagnetic calorimeter or muon chambers). Therefore, this signal is most likely due to a:

A
 pion
B
 neutrino
C
 photon
D
 neutron

 

Q12.

The exchange particles carrying the strong nuclear force are the:

A
 photons
B
 gluons
C
 gravitons
D
 w-bosons

 

Q13.

Which was the first particle discovered which is still today believed to be elementary, i.e. not made up of further constituents?

A
 electron
B
 gluon
C
 photon
D
 proton

 

Q14. Which of the following is not true?

A
 Each meson consists of a single quark and a single antiquark.
B
 Each baryon consists of three quarks.
C
 The magnitude of the charge on every quark is 1/3
D
 A particle consisting of a single quark has not been observed.

 

Q15. Which equation shows the process of annihilation?

Q16. Which of the following is not made of quarks?

A
 kaon
B
 muon
C
 neutron
D
 pion

 

Q17. What is the quark structure for antiprotons?

Q18. The equation represents the weak interaction between a negative pion and a proton.

π− + p → Ko + X

What is the charge, baryon number and strangeness of particle X?

Charge
Baryon number
Strangeness
A
0
0
0
B
0
1
+1
C
1
1
–1
D
0
1
0

 

Q19. Which diagram represents the process of beta-plus decay?

 

Q20. Two gamma photons are produced when a muon and an antimuon annihilate each other.

What is the minimum frequency of the gamma radiation that could be produced?

A
 2.55 × 1016 Hz
B
 5.10 × 1016 Hz
C
 2.55 × 1022 Hz
D
 5.10 × 1022 Hz