The Higgs boson
and Higgs field
slidecast for CLIL
Veerle De Cock
February 2014
Introduction
• film fragment about the Higgs boson
and Higgs field, by DrPhysicsA on a
YouTube channel, 27th of February
2...
• at the time the film fragment was
uploaded on YouTube, the Higgs
boson and Higgs field were predicted
but had not yet be...
Fields: temperature
field

• measure with a thermometer the
temperature at every single point in a
room
• make a list of a...
Fields: electric field
• install an electric field between two
opposite charged plates
• put an electron in it: the electr...
The standard model of
particles
•

source: sbhep-nt.physics.sunysb.edu

• 6 quarks, 6 leptons and
4 bosons
• some have mas...
Research and prediction
by F. Englert, R. Brout and
P. Higgs in 1964
• what causes elementary particles to
have mass?
• wh...
Mass
• not: our mass or the mass of a proton
or electron!
• proton: 2 up quarks and 1 down quark
• together 8 MeV  proton...
• particles without mass such as a
photon must travel at the speed of
light ( c ):
– E=γmc² (special relativity)
– γ is th...
Theory of the Higgs field
• this field exists in all points of the
universe
• a scalar field in three dimensions
• at the ...
• particles without mass don’t interact
with the field, particles with mass do
• conceptual presentation of the field:
– a...
The Higgs boson (or
BEH boson)
• a field is mediated by a boson
• the standard forces each have a
specific type of messeng...
• the Higgs boson can’t be
photographed or detected directly
• the Higgs boson was predicted to
have a hefty mass of 125-1...
Listen also to http://ed.ted.com/lessons/the-higgs-field-explained-don-lincoln
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The Higgs boson and Higgs field

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Explanation about the Higgs boson and Higgs field, based on http://www.youtube.com/watch?v=JY_F606E268

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The Higgs boson and Higgs field

  1. 1. The Higgs boson and Higgs field slidecast for CLIL Veerle De Cock February 2014
  2. 2. Introduction • film fragment about the Higgs boson and Higgs field, by DrPhysicsA on a YouTube channel, 27th of February 2012 • topic of the new curriculum of physics in 2014-2015 • very up-to-date topic
  3. 3. • at the time the film fragment was uploaded on YouTube, the Higgs boson and Higgs field were predicted but had not yet been found • on 4 July 2012 Cern communicated the detection of the Higgs particle
  4. 4. Fields: temperature field • measure with a thermometer the temperature at every single point in a room • make a list of all this separate temperatures • this list represents the temperature field • the field causes an ice cube that is introduced in it, to melt
  5. 5. Fields: electric field • install an electric field between two opposite charged plates • put an electron in it: the electron starts to move by the interaction with the electric field • put a neutron in it: the electric field has no effect
  6. 6. The standard model of particles • source: sbhep-nt.physics.sunysb.edu • 6 quarks, 6 leptons and 4 bosons • some have mass, some don’t • mass is expressed in terms of energy  E=mc² • in 2012: Higgs boson! • note: the standard model also acknowledges four forces or fundamental interactions: gravitational, electromagnetic, strong and weak
  7. 7. Research and prediction by F. Englert, R. Brout and P. Higgs in 1964 • what causes elementary particles to have mass? • why do some have mass and some don’t? • prediction: there must be a field constructed of an elementary particle that could give mass to elementary particles
  8. 8. Mass • not: our mass or the mass of a proton or electron! • proton: 2 up quarks and 1 down quark • together 8 MeV  proton 938 MeV • high amount of energy by constraining the quarks inside the proton • energy is manifested in mass (E=mc²)
  9. 9. • particles without mass such as a photon must travel at the speed of light ( c ): – E=γmc² (special relativity) – γ is the Lorentz factor – a photon has energy (E=hf) – this is only possible if v equals c: – this is mathematically undefined but not 0!
  10. 10. Theory of the Higgs field • this field exists in all points of the universe • a scalar field in three dimensions • at the bottom: lowest energy • particles without mass circle at the bottom • particles with mass gain their mass as a result of oscillation • source: sbhep-nt.physics.sunysb.edu
  11. 11. • particles without mass don’t interact with the field, particles with mass do • conceptual presentation of the field: – a room half filled with water – a person is impeded and slows down when trying to move through the room a particle acquires mass by interacting with the Higgs field – a fish isn’t impeded at all  a particle without mass, e.g. a photon encounters no interaction with the Higgs field
  12. 12. The Higgs boson (or BEH boson) • a field is mediated by a boson • the standard forces each have a specific type of messenger particle to exchange information • e.g. electromagnetic interactions  communication by a photon • the Higgs field is mediated by the Higgs boson
  13. 13. • the Higgs boson can’t be photographed or detected directly • the Higgs boson was predicted to have a hefty mass of 125-126 GeV • the Higgs boson was predicted to decay immediately into other particles (bottom quarks and W bosons) • these hypotheses have been proved by experiments with LHC in Cern, when 2 protons at very close the speed of light collided and as a result all kind of particles were formed
  14. 14. Listen also to http://ed.ted.com/lessons/the-higgs-field-explained-don-lincoln

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