{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/106141"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/106141","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at sqrt(S_NN) = 5.02 TeV with ATLAS at the LHC","abstract":"Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2020-02-28 without embargo terms","abstract_html":"Submission original under an indefinite embargo labeled &#x27;Open Access&#x27;. The submission was exported from vireo on 2020-02-28 without embargo terms","abstract_has_math":false,"creators":["Puri, Akshat"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Sickles, Anne Marie","Grosse Perdekamp, Matthias","Gadway, Bryce","Cooper, Lance"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020-03-02T21:57:54Z","date_published":"2020-03-02T21:57:54Z","updated_at":"2026-07-22T22:24:45Z","subjects":["High energy nuclear physics Jet physics quark gluon plasma"],"languages":["en"],"rights":["Copyright 2019 Akshat Puri"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/106141","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Sickles, Anne Marie","Grosse Perdekamp, Matthias","Gadway, Bryce","Cooper, Lance"]},{"key":"dc:creator","label":"Author","values":["Puri, Akshat"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2020-03-02T21:57:54Z","2019-09-12","2019-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["High energy nuclear physics Jet physics quark gluon plasma"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2019 Akshat Puri"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/106141"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2020-02-28 without embargo terms","Heavy ion collision experiments have been centered around studying the extreme state of matter formed in such collisions, the quark-gluon plasma. There have been efforts to measure and characterize this state of matter for almost two decades, first at the Relativistic Heavy Ion Collider and subsequently at the Large Hadron Collider. While there have been different approaches to study it, correlated particle showers called jets have found a special place as a probe of the QGP. Arising from highly energetic collisions between partons, jets are formed early enough in heavy ion collisions that they experience the formation of the QGP and its evolution. They are modified from what they would be in a vacuum, and studying these modifications can give insight into the properties of the QGP as well as the strong interaction. Jet measurements can focus on a variety of observables like yields, momenta, or fragmentation patterns, each with its own limitations and advantages. This thesis presents a measurement of the angular distribution of charged particles around the jet axis as measured by the ATLAS detector for \\pbpb\\ and \\pp\\ collisions with a center of mass energy of $\\sqrt{s_{\\mathrm{NN}}}=$~5.02~TeV. Comparing the measurement in the two systems shows that charged particles carrying a transverse momenta \\pt\\ of less than 4 GeV have a broader distribution in \\pbpb\\ collisions, while those with $\\pt > 4$ GeV have a narrower distribution. Furthermore, there is an enhancement for particles with $\\pt < 4$ GeV in \\pbpb\\ collisions, with the enhancement increasing up to 2 for \\mbox{$\\rvar < 0.3$} from the jet axis, and remaining constant for \\mbox{$0.3 < \\rvar < 0.6$}. Charged particles with $\\pt\\ > 4$ \\GeV\\ show a small enhancement in the jet core for $\\rvar < 0.05$, and are increasingly suppressed up to 0.5 for \\mbox{$\\rvar < 0.3$}. This depletion remains constant for \\mbox{$0.3 < \\rvar < 0.6$}.","The student, Akshat Puri, accepted the attached license on 2019-09-06 at 14:37.","The student, Akshat Puri, submitted this Dissertation for approval on 2019-09-06 at 14:40.","This Dissertation was approved for publication on 2019-09-12 at 10:09.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14419 on 2020-02-28 at 17:11:04","Made available in DSpace on 2020-03-02T21:57:54Z (GMT). No. of bitstreams: 3 PURI-DISSERTATION-2019.pdf: 24505397 bytes, checksum: b78959e3cf9b5df655c502ee52574409 (MD5) LICENSE.txt: 4208 bytes, checksum: c0eef96021ad62b915421eaf23314149 (MD5) PROQUEST_LICENSE.txt: 4554 bytes, checksum: 8ece1a3ab2c3ca629fec7109308865f8 (MD5) Previous issue date: 2019-09-12"]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at sqrt(S_NN) = 5.02 TeV with ATLAS at the LHC"]}]}],"canonical_facts":{"dc:contributor":["Sickles, Anne Marie","Grosse Perdekamp, Matthias","Gadway, Bryce","Cooper, Lance"],"dc:creator":["Puri, Akshat"],"dc:date":["2020-03-02T21:57:54Z","2019-09-12","2019-12"],"dc:description":["Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2020-02-28 without embargo terms","Heavy ion collision experiments have been centered around studying the extreme state of matter formed in such collisions, the quark-gluon plasma. There have been efforts to measure and characterize this state of matter for almost two decades, first at the Relativistic Heavy Ion Collider and subsequently at the Large Hadron Collider. While there have been different approaches to study it, correlated particle showers called jets have found a special place as a probe of the QGP. Arising from highly energetic collisions between partons, jets are formed early enough in heavy ion collisions that they experience the formation of the QGP and its evolution. They are modified from what they would be in a vacuum, and studying these modifications can give insight into the properties of the QGP as well as the strong interaction. Jet measurements can focus on a variety of observables like yields, momenta, or fragmentation patterns, each with its own limitations and advantages. This thesis presents a measurement of the angular distribution of charged particles around the jet axis as measured by the ATLAS detector for \\pbpb\\ and \\pp\\ collisions with a center of mass energy of $\\sqrt{s_{\\mathrm{NN}}}=$~5.02~TeV. Comparing the measurement in the two systems shows that charged particles carrying a transverse momenta \\pt\\ of less than 4 GeV have a broader distribution in \\pbpb\\ collisions, while those with $\\pt > 4$ GeV have a narrower distribution. Furthermore, there is an enhancement for particles with $\\pt < 4$ GeV in \\pbpb\\ collisions, with the enhancement increasing up to 2 for \\mbox{$\\rvar < 0.3$} from the jet axis, and remaining constant for \\mbox{$0.3 < \\rvar < 0.6$}. Charged particles with $\\pt\\ > 4$ \\GeV\\ show a small enhancement in the jet core for $\\rvar < 0.05$, and are increasingly suppressed up to 0.5 for \\mbox{$\\rvar < 0.3$}. This depletion remains constant for \\mbox{$0.3 < \\rvar < 0.6$}.","The student, Akshat Puri, accepted the attached license on 2019-09-06 at 14:37.","The student, Akshat Puri, submitted this Dissertation for approval on 2019-09-06 at 14:40.","This Dissertation was approved for publication on 2019-09-12 at 10:09.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14419 on 2020-02-28 at 17:11:04","Made available in DSpace on 2020-03-02T21:57:54Z (GMT). No. of bitstreams: 3 PURI-DISSERTATION-2019.pdf: 24505397 bytes, checksum: b78959e3cf9b5df655c502ee52574409 (MD5) LICENSE.txt: 4208 bytes, checksum: c0eef96021ad62b915421eaf23314149 (MD5) PROQUEST_LICENSE.txt: 4554 bytes, checksum: 8ece1a3ab2c3ca629fec7109308865f8 (MD5) Previous issue date: 2019-09-12"],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/106141"],"dc:language":["en"],"dc:rights":["Copyright 2019 Akshat Puri"],"dc:subject":["High energy nuclear physics Jet physics quark gluon plasma"],"dc:title":["Measurement of angular and momentum distributions of charged particles within and around jets in Pb+Pb and pp collisions at sqrt(S_NN) = 5.02 TeV with ATLAS at the LHC"],"dc:type":["text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:45Z"}