Branching ratio and CP asymmetry of Bs→ K*0(1430)π decays in the PQCD approach

Zhi-Qing Zhang

doi:10.1209/0295-5075/97/11001

All issues

Volume 97 / No 1 (February 2012)

EPL, 97 1 (2012) 11001

Abstract

Issue		EPL Volume 97, Number 1, February 2012


Article Number		11001
Number of page(s)		6
Section		The Physics of Elementary Particles and Fields
DOI		https://doi.org/10.1209/0295-5075/97/11001
Published online		03 January 2012

EPL, 97 (2012) 11001

Branching ratio and CP asymmetry of B_s→ K*₀(1430)π decays in the PQCD approach

Zhi-Qing Zhang^a

Department of Physics, Henan University of Technology - Zhengzhou, Henan 450052, PRC

^a zhangzhiqing@haut.edu.cn

Received: 20 July 2011
Accepted: 23 November 2011

Abstract

In the two-quark model supposition for K₀^*(1430), the branching ratios and the direct CP-violating asymmetries for decays $\bar B_s^0\to K^{*0}_0(1430)\pi^0, K^{*+}_0(1430)\pi^-$ are studied by employing the perturbative QCD factorization approach. We find that although these two decays are both tree-dominated, the ratio of their penguin to tree contributions is very different: there is only a few percent for the decay $\bar B_s^0\to K^{*+}_0(1430)\pi^-$ , while about 37% in scenario I, even 51% in scenario II for the decay $\bar B_s^0\to K^{*0}_0(1430)\pi^0$ . It results that these two decays have very different values in the branching ratios and the direct CP asymmetries. The branching ratio of the decay $\bar B_s^0\to K^{*+}_0(1430)\pi^-$ is at the order of 10⁻⁵, and its direct CP asymmetry is about (20–30)%, whereas for the decay $\bar B_s^0\to K^{*0}_0(1430)\pi^0$ its direct CP-violating asymmetry is very large and about 90%, but difficult to measure because the branching ratio for this channel is small and only 10⁻⁷ order.

PACS: 13.25.Hw – Decays of bottom mesons / 12.38.Bx – Perturbative calculations / 14.40.Nd – Bottom mesons (|B| > 0)

© EPLA, 2012

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