bottom quark l.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Bottom Quark PowerPoint Presentation
Download Presentation
Bottom Quark

Loading in 2 Seconds...

play fullscreen
1 / 10

Bottom Quark - PowerPoint PPT Presentation


  • 387 Views
  • Uploaded on

Bottom Quark. Patricia Thrasher. Quark Basics. Strong force, Electromagnetic, Weak, Gravitational Total of 3 generations Quarks make matter Bottom quark possess all four forces Decays into up and charm quark Mass 4.13 ~ 4.37 GeV/c 2 Electric charge -1/3 e. Cabibbo Matrix.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Bottom Quark' - paul


Download Now An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
bottom quark

Bottom Quark

Patricia Thrasher

quark basics
Quark Basics
  • Strong force, Electromagnetic, Weak, Gravitational
  • Total of 3 generations
  • Quarks make matter
  • Bottom quark possess all four forces
  • Decays into up and charm quark
  • Mass 4.13 ~ 4.37 GeV/c2
  • Electric charge -1/3 e
cabibbo matrix
Cabibbo Matrix
  • Unitary Matrix
  • Incorporates two generations of quarks
  • Cabibbo angle related to probability that down and strange quarks decay into up quark.
prediction of new quark
Prediction of New Quark
  • Kobayashi and Maskawa postulate a third family
  • Parameters for CP violation: three rotation angles and one phase
  • Kobayashi and Maskawa awarded Nobel Prize in Physics for their work on broken symmetry

V =

ckm matrix
CKM Matrix
  • CP violation couldn’t be explained by Cabibbo matrix. Kobayashi and Maskawa added third generation to keep track of weak decays
  • CKM helps understand asymmetry in matter and antimatter
  • The transition probability from quark i to quark j is proportional to the magnitude squared of the elements of the matrix Vij
c and p
C and P
  • Charge conjugation turns particle into antiparticle
  • Parity changes a right-hand coordinate system to a left-hand system
  • C = -1 L + S odd

+1 L + S even

  • P = (-1)L+1
  • C and P are broken by Cabibbo and CKM matrix
cp violation
CP Violation
  • Combination of C and P symmetry
  • CP is only broken by CKM matrix, not Cabibbo matrix
  • Standard Model predicts CP violation in addition to the 9 decays seen in CKM
discovery of upsilon
Discovery of Upsilon
  • Upsilon meson
  • In 1977 by Leon Lederman and team of physicists
  • Fermilab particle accelerator enables collision of proton and antiproton with an energy of 1.96 TeV at the DZero and CDF detectors
  • For every 100 billion collisions that occur, one upsilon with mass of 9.5 GeV is produced
upsilon meson
Upsilon Meson
  • Meson containing bottom and antibottom
  • Upsilon (S1) mass of 9.44 +/- 0.03 and Upsilon (S2) mass 10.17 +/- 0.05 GeV
  • 1.21×10−20 seconds
  • Decays into charm,
  • S = 1 or 0
  • L = 0
  • Four excited states discovered