Register to reply 
Hadron interaction via strong yet k mesons decay through weak 
Share this thread: 
#1
Aug2114, 11:31 AM

P: 23

Hi,
I have been getting a little confused; the text book (and from what i can see online) are saying that Hadrons only interact through the strong interaction (along with the electromagnetic force if charged Q) and yet K Mesons decay through the weak interaction. If my understanding is correct the weak interaction is due to a colour charge? since k mesons (or any hadrons for that matter) don't have a colour charge then how can the decay through the weak interaction? I have been really struggling to get my head round this so any help would be greatly appreciated! Many thanks Ryan 


#2
Aug2114, 11:57 AM

P: 883

Since the weak interaction is weak, usually its effect is negligible except in processes that can *only* occur via the weak interaction. For example, K mesons cannot decay through the electromagnetic interaction or the strong interaction, because the electromagnetic and strong interaction both conserve strange quark number. The weak interaction can violate conservation of strangeness and therefore K mesons can decay through the weak interaction, and only through the weak interaction. 


#3
Aug2114, 02:05 PM

P: 23

Many thanks for your reply!
I have re read the book and it makes a lot more sense now however this is a few things I'm still not 100% sure about. so just to get this straight in my mind: to quote the book; "hadrons interact through strong interaction and through the electromagnetic interaction if charged. Apart from the proton, which is stable, hadrons decay through the week interaction." "Leptons interact through the week interaction and through the electromagnetic interaction if charged." In terms of the allowed interactions I'm assuming decay is unrelated to an interaction? In addition can hadrons actually interact with the weak force or just decay through the weak force? Many thanks Ryan 


#4
Aug2114, 02:36 PM

P: 883

Hadron interaction via strong yet k mesons decay through weak



#5
Aug2114, 03:54 PM

Mentor
P: 12,081




#6
Aug2114, 04:03 PM

P: 883




#7
Aug2114, 05:57 PM

P: 1,045

Additionally, in general the hadrons can indeed interact in scattering processes through weak interactions. This is how the neutrino detectors actually try to work. For example the scattering of protons with neutrinos and so on (a whole variety of methods, depending on the neutrinos and what you want to study).



Register to reply 
Related Discussions  
How to Determine the Range of Strong and Weak Interaction  High Energy, Nuclear, Particle Physics  4  
Strong vs Weak Decay  High Energy, Nuclear, Particle Physics  4  
Weak and strong interaction are attactive or repulsive force?  Quantum Physics  1  
Weak and strong interaction  General Physics  0  
Weak interaction  halflifetime of a decay  High Energy, Nuclear, Particle Physics  1 