What is the binding energy of a protium nucleus?

  • Context: Undergrad 
  • Thread starter Thread starter Pranav Jha
  • Start date Start date
  • Tags Tags
    Binding energy Energy
Click For Summary

Discussion Overview

The discussion centers around the binding energy of a protium nucleus, specifically addressing the concept of binding energy in the context of a nucleus with a single nucleon. Participants explore the implications of binding energy, the nature of quarks, and the complexities involved in understanding these concepts within nuclear physics.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • One participant questions how to determine the binding energy of a protium nucleus, given that it contains only one nucleon.
  • Another participant asks whether the mass of a proton in a protium nucleus differs from that of a free proton.
  • Some participants mention the concept of "self-energy" and inquire about the binding energy of quarks.
  • It is proposed that the binding energy of a protium nucleus is zero due to the absence of multiple nucleons.
  • There is a discussion about the binding energy of quarks, with one participant noting that quarks do not exist in isolation and that trying to separate them leads to the creation of more quarks.
  • Another participant references a source claiming that single quarks can be detected, prompting a clarification about the conditions under which quarks are observed.
  • One participant expresses confusion about how electrostatic charges can be contained within quarks, suggesting that there must be some form of binding energy involved.

Areas of Agreement / Disagreement

Participants express differing views on the binding energy of the protium nucleus and the nature of quarks. There is no consensus on the implications of binding energy in these contexts, and the discussion remains unresolved.

Contextual Notes

The discussion includes assumptions about the nature of binding energy and the behavior of quarks, which may not be fully explored or defined. The complexities of mass definitions and the interactions involved in quark behavior are also noted but not resolved.

Pranav Jha
Messages
141
Reaction score
1
what is the binding energy of protium (hydrogen-1) nucleus? As i understand binding energy, it is the energy required to bring two nucleons from infinity to a stable state in a nuclues but if there is only one nuclide in a nucleus how do we determine the binding energy for that nucleus?
 
Physics news on Phys.org
is the mass of a proton in a protium nucleus (if there is any difference between free proton and a protium nucleus) the same as that of a "free proton"?
 
That would be the infamous "self-energy". Interesting.
What is the binding energy of a quark?
 
quantum123 said:
That would be the infamous "self-energy". Interesting.
What is the binding energy of a quark?

sir/madam, i have just started nuclear physics. Your reply only confused me further
 
It's zero.
 
Something must be binding the quarks to form the proton (3 quarks inside). So shouldn't there be binding energy?
 
Of course, but that's not what the question is about. The question is about nuclear binding energy. Since there is only one particle, it's zero.

For quarks, it's far more complicated. If you ask how much energy it takes to disassemble a nucleon, the answer is infinite. Quarks do not exist in isolation, and trying to pull them apart will only result in more quarks being created. If you want to compare the mass of the proton to masses of individual quarks, you run into more problems. What is the mass of the quark? Well, a reasonable answer would be whatever goes into quark's Lagrangian to make all the numbers work. That's called a current mass. But again, mass of the proton is significantly higher than sum of the current masses of constituent quarks. So that doesn't give you anything useful either.
 
  • Like
Likes   Reactions: Rongeet Banerjee
A "single quark" in this case means that it exists without it's anti-particle pair. Normally, top quarks are produced via strong interaction. That means that you always find them in t-t-bar pairs. What these researchers have found are top quarks produced by weak interaction. Or alternatively, top quarks destroyed by weak interaction. At any rate, they end up with a top quark without a t-bar pair. However, that quark does not exist in isolation. It exists bound to some other, lighter quark. A lone quark is not a physical particle, as it always exists off the shell, and therefore, cannot be detected. If someone was to detect a lone quark, it'd mean we have to scrap the QCD.
 
  • #10
I see. Thanks for the clarification. :)
 
  • #11
But how do you put all the electrostatic charges into such a tiny quark against all the electrostatic repulsion in the first place . So there should be some kind of binding energy in the first place, to pack all the charges into this tiny quark ?
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 17 ·
Replies
17
Views
3K
  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 44 ·
2
Replies
44
Views
6K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 12 ·
Replies
12
Views
5K
Replies
1
Views
1K
  • · Replies 29 ·
Replies
29
Views
6K