Study of $\mathbfB^0\rightarrow\rho^+\rho^-$ decays and implications for the CKM angle $\mathbf\phi_2$ 后印本

作者： Vanhoefer, P. and others ¹
作者单位：

1. Belle Collaboration
提交时间：2016-09-12 08:37:18

摘要: We present a measurement of the branching fraction and the longitudinal polarization fraction of B0→ρ+ρ− decays, as well as the time-dependent CP violating parameters in decays into longitudinally polarized ρ+ρ− pairs with Belle's final data set of 772×106 BB¯ pairs, at the Υ(4S) resonance, collected at the asymmetric-energy e+e− collider KEKB. We obtain B(B0→ρ+ρ−)=(28.3±1.5(stat)±1.5(syst))×10−6, fL=0.988±0.012(stat)±0.023(syst), ACP=0.00±0.10(stat)±0.06(syst), SCP=−0.13±0.15(stat)±0.05(syst). We perform an isospin analysis to constrain the CKM angle ϕ2 and obtain two solutions with ϕ2=(93.7±10.6)∘, being most compatible with other Standard-Model based fits to the data.

Belle CKM

分类： 物理学 >> 核物理学
引用： ChinaXiv:201609.00763 (或此版本 ChinaXiv:201609.00763V1)
DOI:10.12074/201609.00763V1
CSTR:32003.36.ChinaXiv.201609.00763.V1
科创链TXID： c6889016-35dd-40e7-9be0-1ae650edc49c
推荐引用方式： Vanhoefer, P. and others.Study of $\mathbfB^0\rightarrow\rho^+\rho^-$ decays and implications for the CKM angle $\mathbf\phi_2$.中国科学院科技论文预发布平台.[ChinaXiv:201609.00763V1] (点此复制)

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2016-09-12 08:37:18

ChinaXiv:201609.00763V1

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