Probing new physics in B ---> f0 (980) K decays

Giri, A.K.; Mawlong, B.; Mohanta, R.

doi:10.1103/PhysRevD.74.114001

Probing new physics in B ---> f0 (980) K decays

Aug, 2006

16 pages

Published in:

Phys.Rev.D 74 (2006) 114001

e-Print:

hep-ph/0608088 [hep-ph]

DOI:

10.1103/PhysRevD.74.114001

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Abstract:

We study the hadronic decay modes

B^{\pm(0)} \to f_0(980) K^{\pm(0)}

, involving a scalar and a pseudoscalar meson in the final state. These decay modes are dominated by the loop induced

b \to s \bar q q(q=s,u,d)

penguins along with a small

b \to u

tree level transition (for

B^+ \to f_0 K^+

) and annihilation diagrams. Therefore, the standard model expectation of direct CP violation is negligibly small and the mixing induced CP violation parameter in the mode

B^0 \to f_0 K_S

is expected to give the same value of

\sin(2\beta)

, as extracted from

B^0 \to J/\psi K_S

but with opposite sign. Using the generalized factorization approach we find the direct CP violation in the decay mode

B^+ \to f_0 K^+

to be of the order of few percent. We then study the effect of the R-parity violating supersymmetric model and show that the direct CP violating asymmetry in

B^+ \to f_0(980) K^+

could be as large as

\sim 80 %

and the mixing induced CP asymmetry in

B^0 \to f_0 K_S

(i.e.,

-S_{f_0 K_S}

) could deviate significantly from that of

\sin(2 \beta)_{J/\psi K_S}

.

12.60.Jv
11.30.Er
13.25.Hw
B: hadronic decay
f0(980)
pseudoscalar meson
scalar meson
Feynman graph: penguin
new interaction
CP: violation

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Figures(0)

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