Physics:Breit frame
In particle physics, the Breit frame (also known as infinite-momentum frame or IMF) is a frame of reference used to describe scattering experiments of the form [math]\displaystyle{ A + B \rightarrow A + \sum C_i }[/math], that is experiments in which particle A scatters off particle B, possibly producing particles [math]\displaystyle{ C_i }[/math] in the process.[1] The frame is defined so that the particle A has its momentum reversed in the scattering process. Another way of understanding the Breit frame is to look at the elastic scattering [math]\displaystyle{ A+\gamma \rightarrow A' }[/math]. The Breit frame is defined as the frame in which [math]\displaystyle{ \vec{p}_A+\vec{p}_{A'}=0 }[/math]. There are different occasions when Breit frame can be useful, e.g., in measuring the electromagnetic form factor of a hadron, [math]\displaystyle{ A }[/math] is the scattered hadron; while for deep inelastic scattering process, the elastically scattered parton should be considered as [math]\displaystyle{ A }[/math]. It is only in the latter case the Breit frame gets related to infinite-momentum frame.
It is named after the American physicist Gregory Breit.[2]
See also
References
- ↑ Griffiths, David (1987). Introduction to elementary particles. New York: Wiley. p. 102. ISBN 978-0-471-60386-3.
- ↑ Hughes, Vernon; Iachello, Francesco; Kusnezov, Dimitri (2001). The Gregory Breit Centennial Symposium: Yale University, USA. Singapore River Edge, N.J: World Scientific. p. 9. ISBN 978-981-02-4553-5.
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