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Search for CP Violation in B0s to J/psi Phi decay at CDF

Liu, Chunlei (2009) Search for CP Violation in B0s to J/psi Phi decay at CDF. Doctoral Dissertation, University of Pittsburgh. (Unpublished)

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The CDF experiment, which uses proton-antiproton collisions at sqrt{s}=1.9 TeV produced at the Fermilab Tevatron, is unique in its ability to observe all flavors of B hadrons and measure their properties. Among them, CP violation is of fundamental interest. In the B+ and B0 systems, measurements of CP violation parameters performed essentially at B factories have borne out the predictions of CKM model. Little is known, experimentally,about CP violation in the B0s system. The standard model predicts very little CP violation there, thus any nonzero measurement could be an indication of New Physics. In this thesis, I will report on the very first flavor-tagged analysis of approximately 2000 B0s -> Jpsi Phi decaysreconstructed in a 1.35 fb-1 data sample collected at CDF. This channel is sensitive not only to the width difference Delta-Gamma in the B0ssystem but also to the CP violation parameter beta_s. The final result we obtain is a confidence region in the two dimensional space of beta_sand Delta-Gamma. Assuming the standard model predictions of beta_s and Delta-Gamma, the probability is 15%, corresponding to 1.5 Gaussian standard deviations.


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Item Type: University of Pittsburgh ETD
Status: Unpublished
CreatorsEmailPitt UsernameORCID
Liu, Chunleichl56@pitt.eduCHL56
ETD Committee:
TitleMemberEmail AddressPitt UsernameORCID
Committee ChairBoudreau, Josephboudreau@pitt.eduBOUDREAU
Committee MemberLeibovich, Adamakl2@pitt.eduAKL2
Committee MemberMueller, Jamesmueller@pitt.eduMUELLER
Committee MemberPaulini,
Committee MemberShepard, Paulshepard@pitt.eduSHEPARD
Date: 28 January 2009
Date Type: Completion
Defense Date: 19 September 2008
Approval Date: 28 January 2009
Submission Date: 19 August 2008
Access Restriction: No restriction; Release the ETD for access worldwide immediately.
Institution: University of Pittsburgh
Schools and Programs: Dietrich School of Arts and Sciences > Physics
Degree: PhD - Doctor of Philosophy
Thesis Type: Doctoral Dissertation
Refereed: Yes
Uncontrolled Keywords: B0s; CKM; CP violation; B physics
Other ID:, etd-08192008-170410
Date Deposited: 10 Nov 2011 20:00
Last Modified: 15 Nov 2016 13:49


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