Insights Blog
-- Browse All Articles --
Physics Articles
Physics Tutorials
Physics Guides
Physics FAQ
Math Articles
Math Tutorials
Math Guides
Math FAQ
Education Articles
Education Guides
Bio/Chem Articles
Technology Guides
Computer Science Tutorials
Forums
Classical Physics
Quantum Physics
Quantum Interpretations
Special and General Relativity
Atomic and Condensed Matter
Nuclear and Particle Physics
Beyond the Standard Model
Cosmology
Astronomy and Astrophysics
Other Physics Topics
Trending
Featured Threads
Log in
Register
What's new
Search
Search
Search titles only
By:
Classical Physics
Quantum Physics
Quantum Interpretations
Special and General Relativity
Atomic and Condensed Matter
Nuclear and Particle Physics
Beyond the Standard Model
Cosmology
Astronomy and Astrophysics
Other Physics Topics
Menu
Log in
Register
Navigation
More options
Contact us
Close Menu
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Forums
Physics
High Energy, Nuclear, Particle Physics
Antimatter in relativistic jets
Reply to thread
Message
[QUOTE="metastable, post: 6185951, member: 654037"] The reason I ask is in pair production I believe we get 2 particles of opposite spin and in the Stern Gerlach experiment we get "discrete points of accumulation." [URL unfurl="true"]https://en.wikipedia.org/wiki/Pair_production[/URL] [I]"However, all other [B]conserved quantum numbers ([/B][URL='https://en.wikipedia.org/wiki/Angular_momentum'][B]angular momentum[/B][/URL], [URL='https://en.wikipedia.org/wiki/Electric_charge']electric charge[/URL], [URL='https://en.wikipedia.org/wiki/Lepton_number']lepton number[/URL]) of the produced particles must sum to zero – thus the created particles shall [B]have opposite values of each other[/B]."[/I] [URL unfurl="true"]https://en.wikipedia.org/wiki/Stern–Gerlach_experiment[/URL] [I]"The Stern–Gerlach experiment demonstrated that the spatial orientation of [URL='https://en.wikipedia.org/wiki/Angular_momentum']angular momentum[/URL] is [URL='https://en.wikipedia.org/wiki/Quantization_(physics)']quantized[/URL]. Thus an atomic-scale system was shown to have intrinsically quantum properties. In the original experiment, silver atoms were sent through a spatially varying magnetic field, which deflected them before they struck a detector screen, such as a glass slide. Particles with non-zero [URL='https://en.wikipedia.org/wiki/Magnetic_moment']magnetic moment[/URL] are deflected, due to the magnetic field [URL='https://en.wikipedia.org/wiki/Spatial_gradient']gradient[/URL], from a straight path. [B]The screen reveals discrete points of accumulation,[/B] rather than a continuous distribution,[URL='https://en.wikipedia.org/wiki/Stern%E2%80%93Gerlach_experiment#cite_note-SG-1'][1][/URL] owing to their quantized [URL='https://en.wikipedia.org/wiki/Spin_(physics)']spin[/URL]."[/I] [URL unfurl="true"]https://journals.aps.org/pr/abstract/10.1103/PhysRev.126.310[/URL] [I]"The asymmetry ratio, defined as the ratio of the number of pairs emitted parallel to the photon polarization plane to the number of pairs emitted perpendicular to this plane, is plotted as a function of Δφ for the cases of no screening and complete screening. It is shown that for very small Δφ the cross section is a very rapidly varying function of Δφ, such that [B]the pairs emitted within the angular region 2Δφ are predominantly perpendicular to the polarization plane for Δφ<Δφ0 [Δφ0=1.23(Z13111) for complete screening, for example] and predominantly parallel to this plane[/B] for Δφ>Δφ0."[/I] [/QUOTE]
Insert quotes…
Post reply
Forums
Physics
High Energy, Nuclear, Particle Physics
Antimatter in relativistic jets
Back
Top