Abstract/Details

Observation of CP violation in neutral B meson going to positive kaon-antipion and neutral B meson going to pion-antipion decays with the BABAR detector


2007 2007

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Abstract (summary)

This dissertation describes the measurement of asymmetries in neutral B meson decays to two-body final states of charged pions and kaons. The results are obtained from a data sample of 383 million ϒ(4 S) → BB¯ decays collected between 1999 and 2006 with the BABAR detector at the PEP-II asymmetric-energy B factory located at the Stanford Linear Accelerator Center, California.

The maximum likelihood fit that incorporates kinematical, event-shape, and particle identification information is used to measure the CP asymmetries in B0 → π +π and K± π decays. The direct CP-violating asymmetry between decays to Kπ + is AKπ = −0.107 ± [special characters omitted]. The time-dependent CP-violating parameters in B0 → π+π decays are Sππ = −0.60 ± 0.11 ± 0.03, Cππ = −0.21 ± 0.09 ± 0.02. For all the measurements above, the first error is statistical and the second is systematic.

Indexing (details)


Subject
Particle physics
Classification
0798: Particle physics
Identifier / keyword
Pure sciences; CKM angle alpha; CP violation
Title
Observation of CP violation in neutral B meson going to positive kaon-antipion and neutral B meson going to pion-antipion decays with the BABAR detector
Author
Li, Xuanzhong
Number of pages
168
Publication year
2007
Degree date
2007
School code
0118
Source
DAI-B 68/11, Dissertation Abstracts International
Place of publication
Ann Arbor
Country of publication
United States
ISBN
9780549330103
Advisor
Dallapiccola, Carlo
Committee member
Golowich, Eugene; Schneider, Stephen E.; Willocq, Stephane
University/institution
University of Massachusetts Amherst
Department
Physics
University location
United States -- Massachusetts
Degree
Ph.D.
Source type
Dissertations & Theses
Language
English
Document type
Dissertation/Thesis
Dissertation/thesis number
3289201
ProQuest document ID
304845591
Copyright
Database copyright ProQuest LLC; ProQuest does not claim copyright in the individual underlying works.
Document URL
http://search.proquest.com/docview/304845591
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