Measurement of the lifetime difference and cp-violating phase in B_s -> J/psi phi decays

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Over the past decades the current theoretical description, the Standard Model of elementary particle physics, was solidified by many measurements as the basic theory describing fundamental particles and their interactions. It is extremely successful in explaining the high-precision data collected by experiments so far. The Standard Model includes several intrinsic parameters which have to be measured in experiments. Independent analyses of different physical processes can constrain those parameters. By combining those measurements physicists might be sensitive to physics beyond the Standard Model. If they are inconsistent it allows to get a hint on the theory that might supersede the Standard ... continued below

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146 pages

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Milnik, Michael & /Karlsruhe U., EKP November 1, 2007.

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Description

Over the past decades the current theoretical description, the Standard Model of elementary particle physics, was solidified by many measurements as the basic theory describing fundamental particles and their interactions. It is extremely successful in explaining the high-precision data collected by experiments so far. The Standard Model includes several intrinsic parameters which have to be measured in experiments. Independent analyses of different physical processes can constrain those parameters. By combining those measurements physicists might be sensitive to physics beyond the Standard Model. If they are inconsistent it allows to get a hint on the theory that might supersede the Standard Model. The goal of the analysis presented in this thesis is to measure some of these parameters in the B{sub s} meson system. The B{sub s} meson, consisting of an anti-b and s quark, is not a pure mass eigenstate, thus allowing a B{sub s} meson to oscillate into its antiparticle via weak interacting processes. This is a general feature of any neutral meson. The history of meson mixing measurements is more then 50 years old. It was first observed in the kaon system. The oscillation in the B{sub d} system was measured very precisely by the B factories, whereas the oscillation frequency of the B{sub s} was measured with more than 5{sigma} significance last year by CDF and first evidence for mixing in the D0 system was presented only this year.

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146 pages

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  • Report No.: FERMILAB-THESIS-2007-38
  • Grant Number: AC02-07CH11359
  • DOI: 10.2172/921110 | External Link
  • Office of Scientific & Technical Information Report Number: 921110
  • Archival Resource Key: ark:/67531/metadc897785

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  • November 1, 2007

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 29, 2016, 7:44 p.m.

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Milnik, Michael & /Karlsruhe U., EKP. Measurement of the lifetime difference and cp-violating phase in B_s -> J/psi phi decays, thesis or dissertation, November 1, 2007; Batavia, Illinois. (digital.library.unt.edu/ark:/67531/metadc897785/: accessed September 26, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.