# Feynman diagram for gluon exchange, time up, gluon horizontal.

• Spinnor
So in summary, the Feynman diagram shown in the link depicts a green_antiblue gluon running horizontally, but it could also be labeled as blue anti-green depending on the direction of color flow.
Spinnor
Gold Member
Consider the Feynman diagram below from,

http://hyperphysics.phy-astr.gsu.edu/hbase/particles/expar.html

where I assume time runs upwards and the gluon in the graphic runs horizontal and is labled as a green_antiblue gluon. If the gluon runs horizontal can one still label a gluon as being green_antiblue? Only if the gluon is not horizontal can we specifically label it? Hope my question is not too confusing.

Thanks for any help!

#### Attachments

• gluon.gif
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You could label it blue anti-green as well, the "direction" of color flow can (and has to) be seen from the quarks if the diagram is drawn like this.

## 1. What is a Feynman diagram for gluon exchange?

A Feynman diagram for gluon exchange is a graphical representation of the interaction between two particles through the exchange of a gluon. It is used to calculate the probability of a particular interaction occurring in quantum field theory.

## 2. How does time affect a gluon exchange?

In a Feynman diagram for gluon exchange, time is represented by the direction of the arrow or line connecting the two particles. In the case of a gluon exchange, the time is "up", meaning that the interaction is happening in the direction of increasing time.

## 3. What does the horizontal line in a Feynman diagram for gluon exchange represent?

The horizontal line in a Feynman diagram for gluon exchange represents the gluon itself. It is a virtual particle that carries the strong nuclear force between quarks.

## 4. Why is gluon exchange important in quantum field theory?

Gluon exchange is important in quantum field theory because it is responsible for the strong nuclear force, which holds quarks together to form protons and neutrons. It also plays a role in the interactions between all particles with color charge, such as quarks and gluons themselves.

## 5. Can gluon exchange occur in isolation?

No, gluon exchange cannot occur in isolation. It is always accompanied by the exchange of other particles, such as quarks, in order to conserve energy and momentum. Gluon exchange is a fundamental component of the strong nuclear force, but it cannot happen without the involvement of other particles.

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