In our contemporary understanding of particle physics – the reality of nature on the smallest scales where tiny elementary particles are important – particles are not really little points but packets of energy with an amorphous shape and ambiguous location.\u00a0 Each different kind of particle, such as electrons, quarks, and photons, has an associated \u201cfield\u201d extending throughout space, and the value of the field at any location corresponds roughly to the likelihood of having a particle of that kind with a certain momentum at that point.<\/p>\n
Different fields interact with each other in specific ways.\u00a0 For example the electron field can interact with the photon field, and that manifests as the electromagnetic interaction.\u00a0 In order for two electrons to interact with each other in order to give the familiar repulsion we all learn about in freshman physics, what we actually have is the electron field at one point interacting with the photon field which then interacts with the electron field at another point.\u00a0 We say that the photon is the carrier for the electromagnetic force.<\/p>\n
Different fields can exchange energy through interactions, so that one type of field gives its energy to another at a certain place.\u00a0 This can result, if enough energy is transferred, in one field going down in value in one place and another field going up, so much so that the first kind particle in a certain location disappears and the second kind of particle appears.<\/p>\n
<\/p>\n
Higgs field and mass<\/span><\/p>\n One of the fields thought to exist is the Higgs field.\u00a0 The Higgs field was hypothesized in order to give rise to the property that we observe as mass.\u00a0 What having mass really means fundamentally is that a particle has energy associated with just existing, rather than only with moving.\u00a0 Particles without mass travel at the speed of light and all the energy they have is due to their motion, but those with mass go slower and have additional energy that is independent of their motion.\u00a0 The interaction of another field with the Higgs field gives the first field the property of having mass – that is having energy not related to its motion but simply due to its presence and interaction with the Higgs field.\u00a0 The strength of the interaction with the Higgs field is what determines the amount of mass.\u00a0 The Higgs field can even interact with itself, giving itself mass.<\/p>\n So, putting it all together, if the Higgs field actually exists, then when a field has a high enough energy in a certain location \u2013 that is there is very likely a particle there – and it interacts with the Higgs field, there should sometimes be enough energy transferred to the Higgs field to create a Higgs particle there.\u00a0 We call the particle arising from the Higgs field the Higgs Boson.\u00a0 For years particle physicists were eager to see evidence of a Higgs Boson actually existing because it would confirm the theory of the Higgs field and how particles get the property of mass.<\/p>\n <\/p>\n Making particles<\/span><\/p>\n This is where the Large Hadron Collider (LHC) comes in.\u00a0 To create a Higgs Boson by having another particle interact with the Higgs Field and transfer its energy requires a lot of energy for the incoming particle.\u00a0 In order to get those energies, supercolliders such as the LHC, which is located at the CERN laboratory in Switzerland, accelerate particles to almost the speed of light and smash them together.\u00a0 In the smash a bunch of new particles are created from the energy of the collision, via the fields interacting as described above, and fly out in all directions.\u00a0 Many of the particles flying out are detected by instrumentation, for instance they may interact with materials such as silicon to create an electrical signal.\u00a0 Some particles pass right through materials and can\u2019t be detected directly.\u00a0 But by tracking the motion of as many of the particles as possible from a collision, the presence of those which can\u2019t be tracked can be inferred, since energy and momentum have to be conserved.\u00a0 The existence of a Higgs Boson created in a collision would show up as one of these \u2018missing\u2019 particles.\u00a0 Sure enough, at the LHC there have been a number of collision events where the missing particle has just the right properties \u2013 such as no charge and large mass – to be the Higgs Boson.\u00a0 Particle physicists are now confident that they have created Higgs Bosons in collisions, and therefore the Higgs field and its interactions are real, and that is how all other particles have the property that we perceive as mass.<\/p>\n The Higgs Boson is the final particle predicted by the so-called \u201cstandard model\u201d of particle physics to be shown to exist.\u00a0 For this reason, and because the interaction with the Higgs field gives rise to mass, physicists have been excited to see evidence of the Higgs boson being created.\u00a0 Still, our understanding of fundamental particles and their interactions is far from complete.\u00a0 80% of the mass of the Universe, which is in the form of dark matter, is not made from particles in the standard model.\u00a0 We also do not have a successful theory that explains how gravity itself can be carried by a field.\u00a0 So while confirming the standard model by confirming the creation of Higgs bosons at the LHC is a triumph for particle physics, it is not the end of the story.<\/p>\n","protected":false},"excerpt":{"rendered":" Recently someone asked me if I could summarize for them them in one sentence what the Higgs Boson is and why it is significant.\u00a0 I said no.\u00a0 It can\u2019t be done adequately in one sentence.\u00a0 But here is an attempt to explain it in a few paragraphs: Particles and fields In our contemporary understanding of … Continue reading What is the Higgs Boson All About?<\/span><\/a><\/p>\n","protected":false},"author":2003,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[21577],"tags":[],"class_list":["post-265","post","type-post","status-publish","format-standard","hentry","category-physics-tidbits"],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/posts\/265","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/users\/2003"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/comments?post=265"}],"version-history":[{"count":0,"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/posts\/265\/revisions"}],"wp:attachment":[{"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/media?parent=265"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/categories?post=265"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.richmond.edu\/physicsnews\/wp-json\/wp\/v2\/tags?post=265"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}![\"\"](\"http:\/\/blog.richmond.edu\/physicsnews\/files\/2013\/10\/CMS_Higgs-event.jpg\")
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