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Measurement of the branching fractio...

Allen, Mark T.

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Measurement of the branching fraction and CP asymmetries in B meson decays into light pseudo-scalar mesons.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Measurement of the branching fraction and CP asymmetries in B meson decays into light pseudo-scalar mesons./
Author:	Allen, Mark T.
Description:	177 p.
Notes:	Adviser: Aaron Roodman.
Contained By:	Dissertation Abstracts International69-01B.
Subject:	Physics, Elementary Particles and High Energy. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3295556
ISBN:	9780549397830

Measurement of the branching fraction and CP asymmetries in B meson decays into light pseudo-scalar mesons.
Allen, Mark T.

Measurement of the branching fraction and CP asymmetries in B meson decays into light pseudo-scalar mesons. - 177 p.

Adviser: Aaron Roodman.

Thesis (Ph.D.)--Stanford University, 2008.

In the Standard Model (SM) of particle physics, the charged-current couplings of the quark sector are described by the Cabibho-Kobayashi-Maskawa (CKM) matrix elements Vqq' . The consistency of multiple measurements of the sides and angles of the CKM Unitarity Triangle provides a stringent test of the SM, and also provides constraints on non-SM physics. The CKM angle alpha can be measured from the interference between B0 → pi + pi- decays with and without B 0 ↔ B¯0 mixing, in combination with the isospin related decays B+ → pi + pi- and B0 → pi 0 pi0. The B → Kpi system also exhibits interesting CP-violating features, including direct CP violation in B0 → K+pi- decays. Sum rules derived from U-spin symmetry and parameters from the B → pipi system relate the branching fraction and charge asymmetry of B +/- → K+/-pi 0 decays to other decays in the Kpi system. Based on a sample of 383 x 106 U (4S) → BB¯ decays, we report updated measurements of the branching fraction for B 0 → pi0pi0 and the time-integrated CP asymmetry, Cp0p0 . We also measure the branching fractions for B +/- → h+/-pi 0 (h+/- = pi+/- , K+/-) and the corresponding charge asymmetries Ah+/-p 0 . We find the branching ratios and asymmetries: B (B0 → pi0pi 0) = (1.47 +/- 0.25 +/- 0.12) x 10-6, B (B+/- → pi+/- pi0 = (5.02 +/- 0.46 +/- 0.29) x 10 -6, B (B+/- K +/-pi0) = (13.56 +/- 0.56 +/- 0.68) x 10-6, Cp0p0 = -0.49 +/- 0.35 +/- 0.04, Ap+/-p 0 = 0.03 +/- 0.08 +/- 0.01, and AK+/-p 0 = 0.030 +/- 0.039 +/- 0.010. Finally, we present bounds on the CKM angle alpha using isospin relations.

ISBN: 9780549397830Subjects--Topical Terms:

1019488
Physics, Elementary Particles and High Energy.

Measurement of the branching fraction and CP asymmetries in B meson decays into light pseudo-scalar mesons.
LDR:02557nam 2200265 a 45 001 958816
005 20110704
008 110704s2008 ||||||||||||||||| ||eng d
020 $a 9780549397830
035 $a (UMI)AAI3295556
035 $a AAI3295556
040 $a UMI $c UMI
100 1 $a Allen, Mark T. $3 1282274
245 1 0 $a Measurement of the branching fraction and CP asymmetries in B meson decays into light pseudo-scalar mesons.
300 $a 177 p.
500 $a Adviser: Aaron Roodman.
500 $a Source: Dissertation Abstracts International, Volume: 69-01, Section: B, page: 0382.
502 $a Thesis (Ph.D.)--Stanford University, 2008.
520 $a In the Standard Model (SM) of particle physics, the charged-current couplings of the quark sector are described by the Cabibho-Kobayashi-Maskawa (CKM) matrix elements Vqq' . The consistency of multiple measurements of the sides and angles of the CKM Unitarity Triangle provides a stringent test of the SM, and also provides constraints on non-SM physics. The CKM angle alpha can be measured from the interference between B0 → pi + pi- decays with and without B 0 ↔ B¯0 mixing, in combination with the isospin related decays B+ → pi + pi- and B0 → pi 0 pi0. The B → Kpi system also exhibits interesting CP-violating features, including direct CP violation in B0 → K+pi- decays. Sum rules derived from U-spin symmetry and parameters from the B → pipi system relate the branching fraction and charge asymmetry of B +/- → K+/-pi 0 decays to other decays in the Kpi system. Based on a sample of 383 x 106 U (4S) → BB¯ decays, we report updated measurements of the branching fraction for B 0 → pi0pi0 and the time-integrated CP asymmetry, Cp0p0 . We also measure the branching fractions for B +/- → h+/-pi 0 (h+/- = pi+/- , K+/-) and the corresponding charge asymmetries Ah+/-p 0 . We find the branching ratios and asymmetries: B (B0 → pi0pi 0) = (1.47 +/- 0.25 +/- 0.12) x 10-6, B (B+/- → pi+/- pi0 = (5.02 +/- 0.46 +/- 0.29) x 10 -6, B (B+/- K +/-pi0) = (13.56 +/- 0.56 +/- 0.68) x 10-6, Cp0p0 = -0.49 +/- 0.35 +/- 0.04, Ap+/-p 0 = 0.03 +/- 0.08 +/- 0.01, and AK+/-p 0 = 0.030 +/- 0.039 +/- 0.010. Finally, we present bounds on the CKM angle alpha using isospin relations.
590 $a School code: 0212.
650 4 $a Physics, Elementary Particles and High Energy. $3 1019488
690 $a 0798
710 2 $a Stanford University. $3 754827
773 0 $t Dissertation Abstracts International $g 69-01B.
790 $a 0212
790 1 0 $a Roodman, Aaron, $e advisor
791 $a Ph.D.
792 $a 2008
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3295556