Analysis of Λb→pK- and pπ- decays in a flavor changing Z' mode

WANG Shuai-Wei; HUANG Jin-Shu; LI Gen-Quan

doi:10.1088/1674-1137/37/6/063103

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Chinese Physics C> 2013, Vol. 37> Issue(6) : 063103 DOI: 10.1088/1674-1137/37/6/063103

Analysis of Λ_b→pK^- and pπ^- decays in a flavor changing Z' mode

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In this paper, we calculate the branching ratios of Λ_b→pK^- and pπ^- decays in the avor changing Z' model. We nd that the branching ratios for these two decay modes are sensitive to the contributions of the Z' boson. For Λ_b→pK^- decay, if the left-handed couplings are equal to the right-handed couplings, the branching ratio of this decay could match up to the currently experimental data for ξ_s=0.01 and -52°<φ_s^L<132°, or ξ_s=0.004 and 0°<φ_s^L<84°; if only the left-handed couplings are considered, it could match up to the experimental data for ξ_s=0.01 and -10°φ_s^L<138°. And for Λ_b→pK^- decay, if the left-handed and right-handed couplings are equal, the branching ratio of Λ_b→pK^- decay may be consistent with the currently experimental data with ξ_d=0.05 and -135°φ_d^L<43°, if only the left-handed couplings are considered, it may be consistent with ξ_d=0.05 and -114°φ_d^L<8°.

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WANG Shuai-Wei, HUANG Jin-Shu and LI Gen-Quan. Analysis of Λ_b→pK^- and pπ^- decays in a flavor changing Z' mode[J]. Chinese Physics C, 2013, 37(6): 063103. doi: 10.1088/1674-1137/37/6/063103

WANG Shuai-Wei, HUANG Jin-Shu and LI Gen-Quan. Analysis of Λ_b→pK^- and pπ^- decays in a flavor changing Z' mode[J]. Chinese Physics C, 2013, 37(6): 063103. doi: 10.1088/1674-1137/37/6/063103 shu

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Received: 2012-07-26
Revised: 2012-09-09

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沈阳化工大学材料科学与工程学院沈阳 110142

Analysis of Λ_b→pK^- and pπ^- decays in a flavor changing Z' mode

Corresponding author: WANG Shuai-Wei,

Corresponding author: HUANG Jin-Shu,

Received Date: 2012-07-26
Accepted Date: 2012-09-09
Available Online: 2013-06-05

Abstract: In this paper, we calculate the branching ratios of Λ_b→pK^- and pπ^- decays in the avor changing Z' model. We nd that the branching ratios for these two decay modes are sensitive to the contributions of the Z' boson. For Λ_b→pK^- decay, if the left-handed couplings are equal to the right-handed couplings, the branching ratio of this decay could match up to the currently experimental data for ξ_s=0.01 and -52°<φ_s^L<132°, or ξ_s=0.004 and 0°<φ_s^L<84°; if only the left-handed couplings are considered, it could match up to the experimental data for ξ_s=0.01 and -10°φ_s^L<138°. And for Λ_b→pK^- decay, if the left-handed and right-handed couplings are equal, the branching ratio of Λ_b→pK^- decay may be consistent with the currently experimental data with ξ_d=0.05 and -135°φ_d^L<43°, if only the left-handed couplings are considered, it may be consistent with ξ_d=0.05 and -114°φ_d^L<8°.