A combined fit on the annihilation corrections in B-u,B-d,B-s -> PP decays within QCDF

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	A combined fit on the annihilation corrections in B-u,B-d,B-s -> PP decays within QCDF
	Chang, Q; Sun, JF; Yang, YL; Li, XN
刊名	PHYSICS LETTERS B
	2015
卷号	740 期号:0 页码:56-60
通讯作者	Chang, Q (reprint author), Henan Normal Univ, Inst Particle & Nucl Phys, Xinxiang 453007, Peoples R China.
英文摘要	Motivated by the possible large annihilation contributions implied by recent CDF and LHCb measurements on nonleptonic annihilation B-meson decays, and the refined experimental measurements on hadronic B-meson decays, we study the strength of annihilation contributions within QCD factorization (QCDF) in this paper. With the available measurements of two-body B-u,B-d,B-s -> pi pi, pi K, KK decays, a comprehensive fit on the phenomenological parameters X-A(i,f) (or rho(i,f)(A) and phi(i,f)(A)) which are used to parameterize the endpoint singularity in annihilation amplitudes is performed with the statistical chi(2) approach. It is found that (1) flavor symmetry breaking effects are hardly to be distinguished between X-A,s(i) and X-A,d(i) due to the large experimental errors and theoretical uncertainties, where X-A,s(i) and X-A,d(i) are related to the nonfactorization annihilation contributions in B-s and B-u,B-d decay, respectively. So X-A,s(i) similar or equal to X-A,d(i) is a good approximation by now. (2) In principle, parameter X-A(f), which is related to the factorization annihilation contributions and independent of the initial state can be regarded as the same variable for B-u,B-d,B-s decays. (3) Numerically, two solutions are found, one is (rho(i)(A), phi(i)(A) [(o)]) = (2.98(-086)(+1.12) - 105(-24)(+34)) and (rho(f)(A), phi(f)(A) [(o)]) = (1.18(-0.23)(+0.20)), -40(-8)(+11)), the other is (rho(i)(A), phi(i)(A) [(o)]) = (2.97(-0.90)(+1.19), -105(-24)(+32) and (rho(f)(A), phi(f)(A) [(o)]) = (2.80(-0.21)(+0.25), 165(-3)(+4)). Obviously, nonfactorization annihilation parameter XiA is generally unequal to factorization annihilation parameter X-A(f), which differs from the traditional treatment. With the fitted parameters, all results for observables of B-u,B-d,B-s -> pi pi, pi K, KK decays are in good agreement with experimental data. (C) 2014 The Authors. Published by Elsevier B.V.
学科主题	Astronomy & Astrophysics ; Physics
类目[WOS]	Astronomy & Astrophysics ; Physics, Nuclear ; Physics, Particles & Fields
关键词[WOS]	CP VIOLATION ; FACTORIZATION
收录类别	SCI
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/21118]
专题	理论物理研究所_理论物理所1978-2010年知识产出
推荐引用方式 GB/T 7714	Chang, Q,Sun, JF,Yang, YL,et al. A combined fit on the annihilation corrections in B-u,B-d,B-s -> PP decays within QCDF[J]. PHYSICS LETTERS B,2015,740(0):56-60.
APA	Chang, Q,Sun, JF,Yang, YL,&Li, XN.(2015).A combined fit on the annihilation corrections in B-u,B-d,B-s -> PP decays within QCDF.PHYSICS LETTERS B,740(0),56-60.
MLA	Chang, Q,et al."A combined fit on the annihilation corrections in B-u,B-d,B-s -> PP decays within QCDF".PHYSICS LETTERS B 740.0(2015):56-60.