Physics:Scalar boson

From HandWiki
Short description: Boson with spin equal to zero

A scalar boson is a boson whose spin equals zero.[1] Boson means that the particle's wavefunction is symmetric under particle exchange and therefore follows Bose–Einstein statistics. The spin-statistics theorem implies that all bosons have an integer-valued spin;[2] the scalar fixes this value to zero.

The name scalar boson arises from quantum field theory, which demands that fields of spin-zero particles transform like a scalar under Lorentz transformation (i.e. are Lorentz invariant).

A pseudoscalar boson is a scalar boson that has odd parity, whereas "regular" scalar bosons have even parity.[3]

Examples

Scalar

Pseudoscalar

  • There are no fundamental pseudoscalars in the Standard Model, but there are pseudoscalar mesons, like the pion.[8]

See also

References

  1. 1.0 1.1 "The scalar boson". ATLAS Collaboration. March 26, 2015. https://atlas.cern/updates/briefing/scalar-boson. 
  2. Nave, R.. "Spin classification of particles". http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/spinc.html. 
  3. Thomson, Mark (2011). "Handout 9: The Weak Interaction and V-A". https://www.hep.phy.cam.ac.uk/~thomson/partIIIparticles/handouts/Handout_9_2011.pdf. 
  4. "New results indicate that particle discovered at CERN is a Higgs boson" (Press release). 14 March 2013. Retrieved 22 May 2021.
  5. "The Nobel Prize in Physics for 2013" (Press release). Nobel Media AB. 2013. Retrieved 22 May 2021.
  6. Qaim, Syed M.; Spahn, Ingo; Scholten, Bernhard; Neumaier, Bernd (8 June 2016). "Uses of alpha particles, especially in nuclear reaction studies and medical radionuclide production". Radiochimica Acta 104 (9): 601. doi:10.1515/ract-2015-2566. https://www.degruyter.com/document/doi/10.1515/ract-2015-2566/html. Retrieved 22 May 2021. 
  7. Peskin, Michael E.; Schroeder, Daniel V. (1995). An Introduction to Quantum Field Theory. Westview Press. ISBN 978-0-201-50397-5. https://archive.org/details/introductiontoqu0000pesk. 
  8. Nave, R.. "Hadrons, baryons, mesons". http://hyperphysics.phy-astr.gsu.edu/hbase/Particles/hadron.html.