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Study of B-0 -˃ rho(+)rho(-) decays and implications for the CKM angle phi(2)

Title
Study of B-0 -˃ rho(+)rho(-) decays and implications for the CKM angle phi(2)
Author
천병구
Keywords
CP-VIOLATION; BELLE DETECTOR; ASYMMETRIES
Issue Date
2016-02
Publisher
AMER PHYSICAL SOC
Citation
PHYSICAL REVIEW D, v. 93, NO 3, Article number 032010, Page. 32010-32010
Abstract
We present a measurement of the branching fraction and the longitudinal polarization fraction of B-0 -˃ rho(+)rho(-) decays, as well as the time-dependent CP violating parameters in decays into longitudinally polarized rho(+)rho(-) pairs with Belle's final data set of 772 x 10(6) B (B) over bar pairs, at the Upsilon(4S) resonance, collected at the asymmetric-energy e(+)e(-) collider KEKB. We obtain B(B-0 -˃ rho(+)rho(-)) = (28.3 +/- 1.5(stat) +/- 1.5(syst)) x 10(-6), f(L) = 0.988 +/- 0.012(stat) +/- 0.023(syst), A(CP) = 0.00 +/- 0.10(stat) +/- 0.06(syst), S-CP = -0.13 +/- 0.15(stat) +/- 0.05(syst). We perform an isospin analysis to constrain the Cabibbo-Kobayashi-Maskawa angle phi(2) and obtain two solutions with phi(2) = (93.7 +/- 10.6)degrees, being most compatible with other Standard-Model based fits to the data.
URI
https://journals.aps.org/prd/abstract/10.1103/PhysRevD.93.032010http://hdl.handle.net/20.500.11754/31837
ISSN
2470-0010; 2470-0029
DOI
10.1103/PhysRevD.93.032010
Appears in Collections:
COLLEGE OF NATURAL SCIENCES[S](자연과학대학) > PHYSICS(물리학과) > Articles
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