Study of CP violation in Bx to J/psi phi decays at DZero

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In a universe dominated by matter, the source of CP violation may explain one of the greatest mysteries in particle physics: what happened to the antimatter? The Standard Model successfully describes CP violation in the B{sup +} and B{sub d}{sup 0} systems, yet insufficiently accounts for the observed matter-antimatter asymmetry. The Standard Model predicts a small value of CP violation in the B{sub s}{sup 0} meson system, which has only recently been experimentally tested. A measurement of large, anomalous CP violation in the B{sub s}{sup 0} system would be a clear indication of new physics sources beyond the Standard Model. ... continued below

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143 pages

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Strom, Derek A. December 1, 2008.

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In a universe dominated by matter, the source of CP violation may explain one of the greatest mysteries in particle physics: what happened to the antimatter? The Standard Model successfully describes CP violation in the B{sup +} and B{sub d}{sup 0} systems, yet insufficiently accounts for the observed matter-antimatter asymmetry. The Standard Model predicts a small value of CP violation in the B{sub s}{sup 0} meson system, which has only recently been experimentally tested. A measurement of large, anomalous CP violation in the B{sub s}{sup 0} system would be a clear indication of new physics sources beyond the Standard Model. This dissertation describes a study of CP violation in approximately 2000 B{sub s}{sup 0} {yields} J/{psi}{phi} decays reconstructed in a 2.8 fb{sup -1} data sample collected by the D0 Run II detector at Fermi National Accelerator Laboratory in Batavia, Illinois. This data was provided by p{bar p} collisions at {radical}s = 1.96 TeV delivered by the Tevatron accelerator between April 2002 and August 2007. Flavor-tagged B{sub s}{sup 0} {yields} J/{psi}({mu}{sup +}{mu}{sup -}){phi}(K{sup +}K{sup -}) decays and an angular analysis are used to study the time evolution of the final state angular distributions. From this analysis, we measure the width difference between the heavy and light mass eigenstates, B{sub s}{sup L} and B{sub s}{sup H}, to be {Delta}{Lambda}{sub s} = 0.19 {+-} 0.07 and the CP-violating phase {phi}{sub s} = -0.57{sub -0.30}{sup +0.24}.

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143 pages

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  • Report No.: FERMILAB-THESIS-2008-74
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/948190 | External Link
  • Office of Scientific & Technical Information Report Number: 948190
  • Archival Resource Key: ark:/67531/metadc897832

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • December 1, 2008

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  • Sept. 27, 2016, 1:39 a.m.

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  • Sept. 26, 2017, 7:15 p.m.

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Strom, Derek A. Study of CP violation in Bx to J/psi phi decays at DZero, thesis or dissertation, December 1, 2008; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc897832/: accessed December 12, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.