# Exercises

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```					                                                        Exercises
Using Bubble
Chamber
Photographs
http://teachers.web.cern.ch/teachers/archiv/HST2005/bubble_chambers/BCwebsite/index.htm
1. What is the
direction of the
magnetic field if the
incoming beam is of
K- particles?
A
2. How many charged particles leave point A ?
2
A
3. Is the event at point A, a decay or a collision ?
a collision
B

4. What can we say about the particle that produces the
event at point B; what is it’s charge?
It is a neutral particle
p   +

p   -

B

5. The particles leaving the decay point B are pions p .
What are their charges?
E
6. Connect point D with E

Does the neutral particle
that decays at point D
come from point C or A ?

D
From the kink at point C

C

A
http://teachers.web.cern.ch/teachers/archiv/HST2005/bubble_chambers/BCwebsite/articles/V0_decays.pdf
E

7. Which of the
particles that travel
between points D
and E has the larger
momentum?

D
The positive particle
8. What particle
travels between
points A and C?
W -, K -, S + or X - ?                                         C

A
W-
http://teachers.web.cern.ch/teachers/archiv/HST2005/bubble_chambers/BCwebsite/index.htm

```
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