YES

It is very difficult to distinguish K⁰ from L⁰ because both may give "vee" :

K⁰ --> p⁺p^-

L⁰--> pp^-

(for further information click here)

If the proton has high  energy in the lamda decay mode  its track is not dark and it can be confusing.

Here we are lucky!

We have already compared the positive track from the "vee" with the proton from the interaction. Because they have approximately the same momentum the lighter track will have the higher velocity, so it has the lower mass. 

 To be sure that this is  K⁰   you have to look at the conservation of Q, B and S. But, to do that you have to answer the following question.

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