Testing lepton flavor universality in terms of BESⅢ and charm-tau factory data

WANG Bin; ZHAO Ming-Gang; SUN Ke-Sheng; LI Xue-Qian

doi:10.1088/1674-1137/37/7/073101

Chinese Physics C> 2013, Vol. 37> Issue(7) : 073101 DOI: 10.1088/1674-1137/37/7/073101

Testing lepton flavor universality in terms of BESⅢ and charm-tau factory data

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Abstract：
The recent measurements on R_K and R_π imply that there exists a possible violation of the leptonic flavor universality which is one of the cornerstones of the Standard Model. It is suggested that a mixing between sterile and active neutrinos might induce such a violation. In this work we consider the scenarios with one or two sterile neutrinos to explicitly realize the data while the constraints from the available experiments have been taken into account. Moreover, as indicated in literature, the deviation of the real PMNS matrix from the symmetric patterns may be due to a μ-τ asymmetry, therefore the measurements on R_{D(D_s)eμ}=Γ(D(D_s)→ e⁺ν_e)/Γ(D(D_s)→ μ⁺ν_μ) and R_{D(D_s)μτ}=Γ(D(D_s)→ μ⁺ν_μ)/Γ(D(D_s)→ τ⁺ν_τ) (and for some other heavy mesons B^± and B_c etc.) may shed more light on the physics responsible for the violation of the leptonic flavor universality. The data of BESⅢ are available to test the universality and that of future charm-tau factories will provide more accurate information. In this work, we will discuss R_{D(D_s)eμ} and R_{D(D_s)μτ} in detail and also briefly consider the cases for B^± and B_c.

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WANG Bin, ZHAO Ming-Gang, SUN Ke-Sheng and LI Xue-Qian. Testing lepton flavor universality in terms of BESⅢ and charm-tau factory data[J]. Chinese Physics C, 2013, 37(7): 073101. doi: 10.1088/1674-1137/37/7/073101

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Received: 2013-04-07
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Testing lepton flavor universality in terms of BESⅢ and charm-tau factory data

Corresponding author: WANG Bin,

Corresponding author: ZHAO Ming-Gang,

Corresponding author: SUN Ke-Sheng,

Corresponding author: LI Xue-Qian,

Received Date: 2013-04-07

Accepted Date: 1900-01-01

Available Online: 2013-07-05

Abstract: The recent measurements on R_K and R_π imply that there exists a possible violation of the leptonic flavor universality which is one of the cornerstones of the Standard Model. It is suggested that a mixing between sterile and active neutrinos might induce such a violation. In this work we consider the scenarios with one or two sterile neutrinos to explicitly realize the data while the constraints from the available experiments have been taken into account. Moreover, as indicated in literature, the deviation of the real PMNS matrix from the symmetric patterns may be due to a μ-τ asymmetry, therefore the measurements on R_{D(D_s)eμ}=Γ(D(D_s)→ e⁺ν_e)/Γ(D(D_s)→ μ⁺ν_μ) and R_{D(D_s)μτ}=Γ(D(D_s)→ μ⁺ν_μ)/Γ(D(D_s)→ τ⁺ν_τ) (and for some other heavy mesons B^± and B_c etc.) may shed more light on the physics responsible for the violation of the leptonic flavor universality. The data of BESⅢ are available to test the universality and that of future charm-tau factories will provide more accurate information. In this work, we will discuss R_{D(D_s)eμ} and R_{D(D_s)μτ} in detail and also briefly consider the cases for B^± and B_c.

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Testing lepton flavor universality in terms of BESⅢ and charm-tau factory data

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