Register to reply 
Is Λ the ∑ particle? or is Λ the Δ particle? notation clarification 
Share this thread: 
#1
May1714, 08:27 AM

P: 121

ive noticed some problems have the quark composition of Λ as uds, but in the Baryon Octuplet that is the same composition as ∑. I always thought Λ was another way of writing Δ, so the quark composition would be ddu, am I wrong?



#2
May1714, 09:36 AM

P: 9

Yes, you are wrong, Λ (Lambda) and Δ (Delta) are different greek letters and different particles.



#3
May1714, 09:38 AM

Mentor
P: 16,115

Yes, you are wrong. The Lambda and the Delta are different particles with different symbols. The bottom line of the triangle is significant. The neutral Sigma and Lambda have the same quark content, but are still different particles, just as C2H6O can be either ethanol or dimethyl ether.



#4
May1714, 11:33 AM

P: 121

Is Λ the ∑ particle? or is Λ the Δ particle? notation clarification
Thanks for clearing that up, much appreciated.



#5
May2014, 12:11 PM

Sci Advisor
P: 1,256

The u and d quarks in the Lambda are in a spin zero state.
The u and d quarks in the Sigma0 are in a spin one state. 


#6
May2014, 12:22 PM

P: 736

They are excitations of the same quark content bound state...Just as Δ^{+} is an excitation of the proton...



Register to reply 
Related Discussions  
Acceleration of a Charged Particle in 3D Vector Notation  Introductory Physics Homework  12  
Particle in a box, some clarification please  Advanced Physics Homework  4  
Clarification in the definition of particle  Classical Physics  3  
A particle of rest mass m_0 and kinetic energy and sticks to a stationary particle wi  Advanced Physics Homework  1  
What is particleparticle or particlehole susceptibility  Atomic, Solid State, Comp. Physics  1 