{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/80495"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/80495","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"A Measurement of B Hadron Correlations in Proton-Antiproton Collisions at Center of Mass Energy = 1.8 TeV","abstract":"B hadron correlations provide input into the significance of higher-order bb¯ production mechanisms. We present a study of B hadron correlations in pp¯ collisions at s = 1.8 TeV. Events containing a bb¯ pair are identified by the presence of an energetic electron or muon and both B hadrons in the event are located by reconstructing their decay vertices using precision charged-particle tracking. The transverse opening angle distribution, Delta&phis;, measured in data is compared to prediction from the PYTHIA and HERWIG Monte Carlo programs and found to be qualitatively similar. The closest matching Monte Carlo model is used to extract the B hadron Delta&phis; distribution from the raw tag distribution. For the combined electron and muon sample, 28.8 +/- 1.0 (stat.) +/- 3.1 (syst.)% of B hadron pairs are found to have Delta&phis; < 90°.","abstract_html":"B hadron correlations provide input into the significance of higher-order bb&macr; production mechanisms. We present a study of B hadron correlations in pp&macr; collisions at s = 1.8 TeV. Events containing a bb&macr; pair are identified by the presence of an energetic electron or muon and both B hadrons in the event are located by reconstructing their decay vertices using precision charged-particle tracking. The transverse opening angle distribution, Delta&phis;, measured in data is compared to prediction from the PYTHIA and HERWIG Monte Carlo programs and found to be qualitatively similar. The closest matching Monte Carlo model is used to extract the B hadron Delta&phis; distribution from the raw tag distribution. For the combined electron and muon sample, 28.8 +/- 1.0 (stat.) +/- 3.1 (syst.)% of B hadron pairs are found to have Delta&phis; < 90&deg;.","abstract_has_math":false,"creators":["Lannon, Kevin Patrick"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Steven Errede","Kevin Pitts"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T20:02:45Z","date_published":"2015-09-25T20:02:45Z","updated_at":"2026-07-22T22:26:14Z","subjects":["Physics, Elementary Particles and High Energy"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3101893"],"render_values":[{"text":"(MiAaPQ)AAI3101893","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/80495","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Steven Errede","Kevin Pitts"]},{"key":"dc:creator","label":"Author","values":["Lannon, Kevin Patrick"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T20:02:45Z","10000-01-01","2003"]},{"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":["Physics, Elementary Particles and High Energy"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/80495","(MiAaPQ)AAI3101893"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["B hadron correlations provide input into the significance of higher-order bb¯ production mechanisms. We present a study of B hadron correlations in pp¯ collisions at s = 1.8 TeV. Events containing a bb¯ pair are identified by the presence of an energetic electron or muon and both B hadrons in the event are located by reconstructing their decay vertices using precision charged-particle tracking. The transverse opening angle distribution, Delta&phis;, measured in data is compared to prediction from the PYTHIA and HERWIG Monte Carlo programs and found to be qualitatively similar. The closest matching Monte Carlo model is used to extract the B hadron Delta&phis; distribution from the raw tag distribution. For the combined electron and muon sample, 28.8 +/- 1.0 (stat.) +/- 3.1 (syst.)% of B hadron pairs are found to have Delta&phis; < 90°.","Made available in DSpace on 2015-09-25T20:02:45Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3101893.pdf: 12799321 bytes, checksum: 10f7518b9ff3a4c25319e4d26c892e81 (MD5) Previous issue date: 2003","Embargo set by: Seth Robbins for item 81777 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","258 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003."]},{"key":"dc:title","label":"Title","values":["A Measurement of B Hadron Correlations in Proton-Antiproton Collisions at Center of Mass Energy = 1.8 TeV"]}]}],"canonical_facts":{"dc:contributor":["Steven Errede","Kevin Pitts"],"dc:creator":["Lannon, Kevin Patrick"],"dc:date":["2015-09-25T20:02:45Z","10000-01-01","2003"],"dc:description":["B hadron correlations provide input into the significance of higher-order bb¯ production mechanisms. We present a study of B hadron correlations in pp¯ collisions at s = 1.8 TeV. Events containing a bb¯ pair are identified by the presence of an energetic electron or muon and both B hadrons in the event are located by reconstructing their decay vertices using precision charged-particle tracking. The transverse opening angle distribution, Delta&phis;, measured in data is compared to prediction from the PYTHIA and HERWIG Monte Carlo programs and found to be qualitatively similar. The closest matching Monte Carlo model is used to extract the B hadron Delta&phis; distribution from the raw tag distribution. For the combined electron and muon sample, 28.8 +/- 1.0 (stat.) +/- 3.1 (syst.)% of B hadron pairs are found to have Delta&phis; < 90°.","Made available in DSpace on 2015-09-25T20:02:45Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3101893.pdf: 12799321 bytes, checksum: 10f7518b9ff3a4c25319e4d26c892e81 (MD5) Previous issue date: 2003","Embargo set by: Seth Robbins for item 81777 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","258 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2003."],"dc:identifier":["http://hdl.handle.net/2142/80495","(MiAaPQ)AAI3101893"],"dc:language":["eng"],"dc:subject":["Physics, Elementary Particles and High Energy"],"dc:title":["A Measurement of B Hadron Correlations in Proton-Antiproton Collisions at Center of Mass Energy = 1.8 TeV"],"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":"2026-07-22T22:26:14Z"}