• Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

The Hunt for the Higgs Boson

Extracts from this document...

Introduction

Hamed Darvishian

The Hunt For Higgs

A2 Physics Coursework

Hamed Darvishian

[2010]


image00.png

Table of Contents

The Standard Model of Elementary Particles        3

The Higgs Theory (Boson, Mechanism and Field)        3/4

Discovery of the Higgs        4

Possibilities of Decay        5

Large Hadron Collider        5

The ATLAS detector        6

The G.R.I.D        7

The Aim and Benefits of the LHC        7


The Standard Model of Elementary Particles

The ‘Standard Model of Particle Physics’ describes the interactions between particles, where the fundamental force carriers are treated as mass-less particles. It is the theoretical framework that is used to explain the relations between complex particles and forces. The theory was first introduced by Sheldon Glashow through the electromagnetic and weak interactions, but was then developed on Steven Weinberg and Abdus Salam. Although the Standard Model is able to explain the interactions between quarks, leptons and bosons, it does not include an integral property of particles, mass. image01.png

In 1964, Peter Higgs showed how to give mass to fundamental particles through the Higgs mechanism. The Higgs mechanism is where the symmetry of mass-less particles is broken and non-zero masses become possible.

This is just a hypothetical theory but if true, an extra particle called the Higgs boson should exist. A disturbance in the Higgs field is in actual fact a Higgs boson.

...read more.

Middle

The Higgs Field is defined as:

A field hypothesized to account for spontaneous symmetry breaking in the standard model.

Particles in the standard model acquire mass from interactions with the Higgs field. Massive particles (‘massive’ meaning a particle with mass) interact with the Higgs field and it is that interaction that gives them their mass. Particles such as photons don’t interact with the Higgs field and thus have no mass. The Higgs field is included in the Higgs Mechanism.

What is the Higgs Mechanism?

The Higgs mechanism can be defined as:

A theoretical framework which explains how the masses of the W and Z bosons of the standard model, arise through spontaneous electroweak symmetry breaking (the Higgs field).

The Higgs mechanism then explains how massive, sub-atomic particles obtain mass. Different particles interact with the Higgs field differently with different strengths; hence some particles are heavier than others.

The whole Higgs ‘theory’ supposedly sums up the mystery of mass but it has not been discovered yet. Physicists and engineers at the Large Hadron Collider and Fermilab Tevatron have been working on the discovery of the Higgs boson. There are speculations that the Higgs boson can be discovered in more ways than one.

...read more.

Conclusion

Although the LHC cost £3.4billion, it allows testing of theories and ideas such as the Higgs theory. The social impact of this is that the questions asked and also the answers found as a result, can be so  fundamental that they can only be applied in the future, if at all.  Yet there is a possibility of a discovery that can be applied almost immediately such as medical, consumer and industrial technologies.  

The discovery of the Higgs boson would shine light on the origin of mass and would widen our knowledge. It would prove key theories in particle physics and quantum dynamics. It is the last remaining particle of the ‘Standard Model’ that has not been detected; all other particles have been proven to exist through experiments. If the LHC was to develop enough energy for an observable Higgs boson then we would understand why matter has mass. From that point then we can move onto proving other theories and ideas using the principle of the Higgs Boson.

 | Page

...read more.

This student written piece of work is one of many that can be found in our AS and A Level Modern Physics section.

Found what you're looking for?

  • Start learning 29% faster today
  • 150,000+ documents available
  • Just £6.99 a month

Not the one? Search for your essay title...
  • Join over 1.2 million students every month
  • Accelerate your learning by 29%
  • Unlimited access from just £6.99 per month

See related essaysSee related essays

Related AS and A Level Modern Physics essays

  1. Peer reviewed

    Albert Einstein - The father of modern physics

    4 star(s)

    lengths become shorter, these differences can only be seen by an external observer however, so a person going at such a speed to produce an effect wouldn?t be able to notice it themselves. As to finding actual reasons for this happening, I have yet to find any, but my own

  2. How temperature affects the viscosity of honey

    (I am making the assumption the 5cm will give enough time for the ball to get up to terminal velocity) 2. Fill the measuring cylinder with 10�C 'Romero's Honey' (from the fridge) testing the temperature with a thermometer about 20cm high.

  1. Physics-energy production in Hong Kong and potential new ways of generating power.

    (?????)+?d sound effect ????:o) Wind energy The blade of the wind turbine acts like an airplane wing. When the wind blows, the blade will rotate and cause the rotor to spin. This provides mechanical energy for generating electricity. Problems of renewable energy Solar Power Building and installing solar heating panels are costly.

  2. Free essay

    The development of the modern concept of the atom, the size and nature of ...

    There is a definite number of electrons that can be in the same orbit. When the orbits closest to the nucleus are filled the atom is at a ground state. When the electrons become charged they move into a higher orbit and are then at an exited state.

  1. A2 OCR B (Advancing Physics) - Research and Report: Nuclear Fusion as an Energy ...

    However the neutron will not always fuse with the Lithium, it may join with other parts of the reactor creating radioactivity and the need for another neutron for more tritium. This can be overcome with neutron multipliers, or the use of the second reaction shown; Lithium-7 which produces an extra neutron.

  2. Quantum Phenomena Observed During Near Absolute Zero Conditions

    This brings us onto Schr�dinger's cat, a thought experiment which criticises the Copenhagen Interpretation of quantum mechanics, stating that the interpretation would just collapse when applied to objects on a large scale, in his case, a feline mammal. If atoms can exist in a state of superposition then is it

  1. Modern Physics - AQA GCE Physics B - Revision Notes

    Therefore the total energy that?s emitted will spread increasingly thin the further away from the source. The intensity has an inverse square relationship with distance from the point source, so as distance doubles, intensity falls to 1 / 9: Intensity (Wm-2)

  2. Physics Course work 'What is the Higgs Boson'

    This is the same for the Higgs Boson. However, there isn?t a stable decay for the Higgs Boson; there is only a probability of different decays it could occur due to the fact that the Higgs Boson could be in different forms: Higgs Boson could be in pairs of Quarks

  • Over 160,000 pieces
    of student written work
  • Annotated by
    experienced teachers
  • Ideas and feedback to
    improve your own work