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Scalar resonance effects on the B_s - \bar B_s mixing angle

Abstract : The $B_s^0 \to J/\psi \phi$ and $B_s^0 \to J/\psi f_0(980)$ decays are analyzed within generalized QCD factorization including all leading-order corrections in $\alphas$. We point out that the ratio of our calculated widths, $\Gamma (B_s^0\to J/\psi f_0(980), f_0(980)\to \pi^+\pi^-)/ \Gamma(B_s^0 \to J/\psi \phi,\phi\to K^+K^-)$, strongly indicates that $S$-wave effects in the $f_0(980)$'s daughter pions or kaons cannot be ignored in the extraction of the $B_s-\bar{B}_s$ mixing angle, $-2\beta_s$, from the $B_s^0 \to \phi J/\psi$ decay amplitudes.
Mots-clés : CP violation Bs decays QCDF
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Contributor : Swarna Bassava <>
Submitted on : Thursday, April 15, 2010 - 10:20:57 AM
Last modification on : Thursday, December 10, 2020 - 12:30:59 PM

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  • HAL Id : in2p3-00473309, version 1
  • ARXIV : 1003.5980


O. Leitner, J. -P. Dedonder, B. Loiseau, B. El-Bennich. Scalar resonance effects on the B_s - \bar B_s mixing angle. 2010. ⟨in2p3-00473309⟩



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