The experimental predictions of R D , ##IMG## [http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn3.gif] {${R}_{{D}^{{\ast}}}$} , R J / ψ , ##IMG## [http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn4.gif] {${P}_{\tau }^{{D}^{{\ast}}}$} and ##IMG## [http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn5.gif] {${F}_{\mathrm{L}}^{{D}^{{\ast}}}$} in B decays mediated via ##IMG## [http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn6.gif] {$b\to cl{\overline{\nu }}_{\tau }$} quark level transition deviate significantly from the standard model expectations. The current world average of the ratio of branching ratios R D and ##IMG## [http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn7.gif] {${R}_{{D}^{{\ast}}}$} in ##IMG## {$B\to {D}^{...}

中文翻译：

---

## IMG ##的含义[http://ej.iop.org/images/0954-3899/47/11/115001/toc_gaba422ieqn1.gif] {$ b \至c \ tau {\ overline {\ nu}} _ {\ tau} $}在## IMG ## [http：//ej.iop.org/images/0954 ...]上的风味异常{$ {B} _ {s} \\ to {D} _ {s } ^ {{\ ast}} \ tau {\ overline {\ nu}} _ {\ tau} $}

RD的实验预测，## IMG ## [http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn3.gif] {$ {R} _ {{D} ^ { {\ ast}}} $}，RJ /ψ，## IMG ## [http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn4.gif] {$ {P} _ {\ tau} ^ {{D} ^ {{\ ast}}} $}和## IMG ## [http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn5 .gif] B中的{$ {F} _ {\ mathrm {L}} ^ {{D} ^ {{\ ast}}} $}美元是通过## IMG ## [http：//ej.iop。 org / images / 0954-3899 / 47/11/115001 / gaba422ieqn6.gif] {$ b \ to cl {\ overline {\ nu}} _ {\ tau} $}夸克级转换与标准模型预期值有很大差异。分支比RD和## IMG ##的当前世界平均值[http://ej.iop.org/images/0954-3899/47/11/115001/gaba422ieqn7.gif] {$ {R} _ ## IMG ## {$ B \ to {D} ^ {...}中的{{D} ^ {{\ ast}}} $}