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[{"key": "dc.contributor.advisor", "value": "Lappi, Tuomas", "language": "", "element": "contributor", "qualifier": "advisor", "schema": "dc"}, {"key": "dc.contributor.author", "value": "Stylman, Tapani", "language": null, "element": "contributor", "qualifier": "author", "schema": "dc"}, {"key": "dc.date.accessioned", "value": "2017-11-09T18:55:59Z", "language": "", "element": "date", "qualifier": "accessioned", "schema": "dc"}, {"key": "dc.date.available", "value": "2017-11-09T18:55:59Z", "language": "", "element": "date", "qualifier": "available", "schema": "dc"}, {"key": "dc.date.issued", "value": "2017", "language": null, "element": "date", "qualifier": "issued", "schema": "dc"}, {"key": "dc.identifier.other", "value": "oai:jykdok.linneanet.fi:1738333", "language": null, "element": "identifier", "qualifier": "other", "schema": "dc"}, {"key": "dc.identifier.uri", "value": "https://jyx.jyu.fi/handle/123456789/55817", "language": "", "element": "identifier", "qualifier": "uri", "schema": "dc"}, {"key": "dc.description.abstract", "value": "T\u00e4m\u00e4n ty\u00f6n tavoitteena on laskea kahdella tavalla puutason differentiaalisen vaikutusalan korkeaenergiaraja jarrutuss\u00e4teilyprosessille, jossa kvarkki\r\nsiroaa ulkoisesta Coulombin kent\u00e4st\u00e4 ja emittoi gluonin. Ensin vaikutusala lasketaan k\u00e4ytt\u00e4m\u00e4ll\u00e4 \"tavallista\" perturbatiivista kvanttiv\u00e4ridynamiikkaa\r\ntapauksessa, jossa ulkoista kentt\u00e4\u00e4 vastaa sironta leptonista. Sirontaan liittyv\u00e4 matriisielementti rakennetaan prosessiin liittyvist\u00e4 kahdesta Feynmanin\r\ndiagrammista, ja differentiaalisen vaikutusalan laskeminen t\u00e4st\u00e4 on suoraviivaista tavallisen hiukkasfysiikan alkeiskurssin tiedoilla. Korkeaenergiaraja\r\nsaadaan poimimalla matriisielementist\u00e4 vain voimakkaimmin massakeskipisteliikeem\u00e4\u00e4r\u00e4st\u00e4 riippuvat termit.\r\nToiseksi prosessi lasketaan valokartioperturbaatioteorian avulla. T\u00e4ss\u00e4 ty\u00f6ss\u00e4\r\nk\u00e4ytetty menetelm\u00e4 noudattelee pitk\u00e4lti Bjorkenin, Kogutin ja Soperin vastaavaa QED-laskua. Prosessin vuorovaikuttavat alku- ja lopputilat kehitet\u00e4\u00e4n valokartioaaltofunktioden avulla sarjoiksi Fockin avaruuden tiloja\r\nja amplitudi lasketaan \"vanhanaikaisilla\"hamiltonilaisen perturbaatioteorian\r\nkeinoilla. Korkeaenergiaraja on luontevasti n\u00e4kyviss\u00e4 valokartiokoordinaatiston valinnassa ja sironnan eikonaaliapproksimaatiossa.", "language": "fi", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.abstract", "value": "The goal of this work is to calculate with two different methods the high\r\nenergy limit of the tree-level differential cross section for a bremsstrahlung\r\nprocess where a quark scatters from an external Coulomb field and emits\r\na gluon. The cross section is first calculated using \"ordinary\" perturbative\r\nquantum chromodynamics with the external field being that of a lepton. The\r\nmatrix element for the scattering is constructed from the two related Feyn\r\nman diagrams and the calculation of the cross section then proceeds straight-\r\nforwardly with the methods taught in any basic particle physics course. The\r\nhigh energy limit is given by selecting only the terms in the matrix element\r\nthat have the highest power of the center of mass momentum.\r\nSecond, the process is calculated in light cone perturbation theory. The\r\nmethod used in this work closely follows that of Bjorken, Kogut and Soper's\r\nQED calculation. The interacting initial and final states are expanded\r\ninto series of Fock states with the aid of light cone wave functions and the\r\namplitude is calculated using \"old-fashioned\" Hamiltonian perturbation theory. The high energy limit is present with the choice of light-cone coordinates\r\nand in the eikonal approximation for the scattering.", "language": "en", "element": "description", "qualifier": "abstract", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted using Plone Publishing form by Tapani Stylman (taanstyl) on 2017-11-09 18:55:58.656179. Form: Pro gradu -lomake (https://kirjasto.jyu.fi/julkaisut/julkaisulomakkeet/pro-gradu-lomake). JyX data: [jyx_publishing-allowed (fi) =True]", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Submitted by jyx lomake-julkaisija (jyx-julkaisija.group@korppi.jyu.fi) on 2017-11-09T18:55:59Z\r\nNo. of bitstreams: 2\r\nURN:NBN:fi:jyu-201711094198.pdf: 184953 bytes, checksum: 1c8cdac2b60835c3053ae86616e14488 (MD5)\r\nlicense.html: 4791 bytes, checksum: 31d68fbf499e6d6cb9a02779ca5ed7d7 (MD5)", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.description.provenance", "value": "Made available in DSpace on 2017-11-09T18:55:59Z (GMT). No. of bitstreams: 2\r\nURN:NBN:fi:jyu-201711094198.pdf: 184953 bytes, checksum: 1c8cdac2b60835c3053ae86616e14488 (MD5)\r\nlicense.html: 4791 bytes, checksum: 31d68fbf499e6d6cb9a02779ca5ed7d7 (MD5)\r\n Previous issue date: 2017", "language": "en", "element": "description", "qualifier": "provenance", "schema": "dc"}, {"key": "dc.format.extent", "value": "1 verkkoaineisto (26 sivua)", "language": null, "element": "format", "qualifier": "extent", "schema": "dc"}, {"key": "dc.format.mimetype", "value": "application/pdf", "language": null, "element": "format", "qualifier": "mimetype", "schema": "dc"}, {"key": "dc.language.iso", "value": "eng", "language": null, "element": "language", "qualifier": "iso", "schema": "dc"}, {"key": "dc.rights", "value": "In Copyright", "language": "en", "element": "rights", "qualifier": null, "schema": "dc"}, {"key": "dc.subject.other", "value": "kvanttiv\u00e4ridynamiikka", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "valokartioh\u00e4iri\u00f6teoria", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.subject.other", "value": "QCD", "language": null, "element": "subject", "qualifier": "other", "schema": "dc"}, {"key": "dc.title", "value": "QCD bremsstrahlung at high energy", "language": null, "element": "title", "qualifier": null, "schema": "dc"}, {"key": "dc.type", "value": "master thesis", "language": null, "element": "type", "qualifier": null, "schema": "dc"}, {"key": "dc.identifier.urn", "value": "URN:NBN:fi:jyu-201711094198", "language": null, "element": "identifier", "qualifier": "urn", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Pro gradu -tutkielma", "language": "fi", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.type.ontasot", "value": "Master\u2019s thesis", "language": "en", "element": "type", "qualifier": "ontasot", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Matemaattis-luonnontieteellinen tiedekunta", "language": "fi", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.faculty", "value": "Faculty of Sciences", "language": "en", "element": "contributor", "qualifier": "faculty", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Fysiikan laitos", "language": "fi", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.department", "value": "Department of Physics", "language": "en", "element": "contributor", "qualifier": "department", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "University of Jyv\u00e4skyl\u00e4", "language": "en", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.contributor.organization", "value": "Jyv\u00e4skyl\u00e4n yliopisto", "language": "fi", "element": "contributor", "qualifier": "organization", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Fysiikka", "language": "fi", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.subject.discipline", "value": "Physics", "language": "en", "element": "subject", "qualifier": "discipline", "schema": "dc"}, {"key": "dc.date.updated", "value": "2017-11-09T18:55:59Z", "language": "", "element": "date", "qualifier": "updated", "schema": "dc"}, {"key": "yvv.contractresearch.funding", "value": "0", "language": "", "element": "contractresearch", "qualifier": "funding", "schema": "yvv"}, {"key": "dc.type.coar", "value": "http://purl.org/coar/resource_type/c_bdcc", "language": null, "element": "type", "qualifier": "coar", "schema": "dc"}, {"key": "dc.rights.accesslevel", "value": "openAccess", "language": "fi", "element": "rights", "qualifier": "accesslevel", "schema": "dc"}, {"key": "dc.type.publication", "value": "masterThesis", "language": null, "element": "type", "qualifier": "publication", "schema": "dc"}, {"key": "dc.subject.oppiainekoodi", "value": "4021", "language": null, "element": "subject", "qualifier": "oppiainekoodi", "schema": "dc"}, {"key": "dc.subject.yso", "value": "hiukkasfysiikka", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.subject.yso", "value": "ydinfysiikka", "language": null, "element": "subject", "qualifier": "yso", "schema": "dc"}, {"key": "dc.format.content", "value": "fulltext", "language": null, "element": "format", "qualifier": "content", "schema": "dc"}, {"key": "dc.rights.url", "value": "https://rightsstatements.org/page/InC/1.0/", "language": null, "element": "rights", "qualifier": "url", "schema": "dc"}, {"key": "dc.type.okm", "value": "G2", "language": null, "element": "type", "qualifier": "okm", "schema": "dc"}]
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