K{sub 1}(1270)-K{sub 1}(1400) mixing angle and new-physics effects in B{yields}K{sub 1}l{sup +}l{sup -} decays
- Department of Physics, Chung-Yuan Christian University, Chungli 320, Taiwan (China)
We study semileptonic B meson decays B{yields}K{sub 1}(1270)l{sup +}l{sup -} and K{sub 1}(1400)l{sup +}l{sup -} (l{identical_to}e, {mu}, {tau}), where the strange P-wave mesons, K{sub 1}(1270) and K{sub 1}(1400), are the mixtures of the K{sub 1A} and K{sub 1B}, which are the 1{sup 3}P{sub 1} and 1{sup 1}P{sub 1} states, respectively. We show that the ratio R{sub l}{identical_to}B(B{yields}K{sub 1}(1400)l{sup +}l{sup -})/B(B{yields}K{sub 1}(1270)l{sup +}l{sup -}), insensitive to new-physics parameters, is suitable for determining the K{sub 1}(1270)-K{sub 1}(1400) mixing angle, {theta}{sub K{sub 1}}. The forward-backward asymmetry shows a weak {theta}{sub K{sub 1}} dependence for B{yields}K{sub 1}(1270){mu}{sup +}{mu}{sup -}, but relatively strong for B{yields}K{sub 1}(1400){mu}{sup +}{mu}{sup -}. We investigate model-independent new-physics corrections to operators relevant to the b{yields}sl{sup +}l{sup -} electroweak-penguin and weak-box diagrams. Furthermore, for the B{yields}K{sub 1}(1270){mu}{sup +}{mu}{sup -} decay the position of the forward-backward asymmetry zero, which is almost independent of the value of {theta}{sub K{sub 1}}, can be dramatically changed under variation of new-physics parameters.
- OSTI ID:
- 21254276
- Journal Information:
- Physical Review. D, Particles Fields, Vol. 78, Issue 7; Other Information: DOI: 10.1103/PhysRevD.78.074007; (c) 2008 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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