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Measurements of CP-violating asymmet...

Danielson, Morris Nicholas.

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Measurements of CP-violating asymmetries and branching fractions in the decays of B mesons to charged pions and kaons at the Babar detector.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Measurements of CP-violating asymmetries and branching fractions in the decays of B mesons to charged pions and kaons at the Babar detector./
作者:	Danielson, Morris Nicholas.
面頁冊數:	160 p.
附註:	Source: Dissertation Abstracts International, Volume: 66-08, Section: B, page: 4290.
Contained By:	Dissertation Abstracts International66-08B.
標題:	Physics, Elementary Particles and High Energy. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3188621
ISBN:	9780542306938

Measurements of CP-violating asymmetries and branching fractions in the decays of B mesons to charged pions and kaons at the Babar detector.
Danielson, Morris Nicholas.

Measurements of CP-violating asymmetries and branching fractions in the decays of B mesons to charged pions and kaons at the Babar detector. - 160 p.

Source: Dissertation Abstracts International, Volume: 66-08, Section: B, page: 4290.

Thesis (Ph.D.)--Princeton University, 2005.

This dissertation describes the measurement of branching fractions and CP asymmetries in neutral B meson decays to charmless two-body final states of charged pions and kaons. CP violation is a poorly-constrained phenomenon in the Standard Model (SM) of particle physics and had been studied only in the kaon system before the Babar and Belle experiments. The decay of the neutral B meson to charged pions and kaons is particularly useful for the study of CP violation because they can be related to the Unitarity Triangle angle alpha.

ISBN: 9780542306938Subjects--Topical Terms:

1019488
Physics, Elementary Particles and High Energy.

Measurements of CP-violating asymmetries and branching fractions in the decays of B mesons to charged pions and kaons at the Babar detector.
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245 1 0 $a Measurements of CP-violating asymmetries and branching fractions in the decays of B mesons to charged pions and kaons at the Babar detector.
300 $a 160 p.
500 $a Source: Dissertation Abstracts International, Volume: 66-08, Section: B, page: 4290.
500 $a Adviser: Stew Smith.
502 $a Thesis (Ph.D.)--Princeton University, 2005.
520 $a This dissertation describes the measurement of branching fractions and CP asymmetries in neutral B meson decays to charmless two-body final states of charged pions and kaons. CP violation is a poorly-constrained phenomenon in the Standard Model (SM) of particle physics and had been studied only in the kaon system before the Babar and Belle experiments. The decay of the neutral B meson to charged pions and kaons is particularly useful for the study of CP violation because they can be related to the Unitarity Triangle angle alpha.
520 $a We use an extended maximum likelihood technique that incorporates kinematic, event-shape, and particle identification information to measure the branching fractions of the neutral B meson to pipi, Kpi. These branching fractions are found to be (5.6 +/- 0.4 +/- 0.3) x 10-6 and (19.2 +/- 0.6 +/- 0.6) x 10 -6 respectively. The decay to KK is found to have a branching fraction of less than 0.4 x 10-6 at the 90% confidence level. We also measure the direct CP-violating asymmetry between decays to K+pi- and K-pi+ to be -0.133 +/- 0.030 +/- 0.009. Decay time information and b quark flavor information are then added to determine the time-dependent CP violation parameters S and C, which we find to be -0.30 +/- 0.17 +/- 0.03 and -0.09 +/- 0.15 +/- 0.04, respectively. For all measurements above the first error is statistical and the second is systematic.
520 $a The results are obtained from a data sample of 227 million decays of the &Ugr;(4S) to B0 B¯z collected between 1999 and 2004 with the Babar detector at the PEP-II asymmetric B factory located at the Stanford Linear Accelerator Center.
590 $a School code: 0181.
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