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The ratio R(D) and the D-meson distribution amplitude
Zhong, Tao; Zhang, Yi; Wu, Xing-Gang; Fu, Hai-Bing; Huang, Tao; Zhong, T; Zhang, Y; Wu, XG; Fu, HB; Huang, T; Zhong, Tao, Zhang, Yi, Wu, Xing-Gang, Fu, Hai-Bing; Huang, Tao; 黄涛(理)
2018
Source PublicationEUROPEAN PHYSICAL JOURNAL C
ISSN1434-6044
EISSN1434-6052
Volume78Issue:11Pages:937
SubtypeArticle
AbstractIn this paper, we calculate the B -> D transition form factors (TFFs) within the light-cone sum rules (LCSRs) and predict the ratio R(D). More accurate D-meson distribution amplitudes (DAs) are essential to get a more accurate theoretical prediction. We construct a new model for the twist-3 DAs phi(p)(3;D) and phi(sigma)(3;D) based on the QCD sum rules under the background field theory for their moments as we have done for constructing the leading-twist DA phi(2;D). As an application, we observe that the twist-3 contributions are sizable in whole q(2)-region. Taking the twist-2 and twist-3 DAs into consideration, we obtain f(+,0)(B -> D) (0) = 0.659(-0.032)(+0.029) -0.032. As a combination of the Lattice QCD and the QCD LCSR predictions on the TFFs f(+,0)(B -> D) (q(2)), we predict R(D) = 0.320(-0.021)(+0.018), which is about 1.5 sigma deviation from the HFAG average of the Belle and BABAR data. At present the data still have large errors, and we need further accurate measurements of the experiment to confirm whether there is a signal of new physics from the ratio R(D).
DOI10.1140/epjc/s10052-018-6387-7
WOS KeywordTWIST-3 DISTRIBUTION AMPLITUDES ; CONE SUM-RULES ; WAVE-FUNCTIONS ; FORM-FACTOR ; QCD ; MASS ; DECAYS ; PION
Indexed BySCI
Language英语
WOS Research AreaPhysics
WOS SubjectPhysics, Particles & Fields
WOS IDWOS:000450607400001
ADS Bibcode2018EPJC...78..937Z
AXRIV CODE1807
inspireid1681662
Citation statistics
Cited Times:13 [ADS]
Document Type期刊论文
Identifierhttp://ir.ihep.ac.cn/handle/311005/286960
Collection理论物理室
Affiliation中国科学院高能物理研究所
First Author AffilicationInstitute of High Energy
Recommended Citation
GB/T 7714
Zhong, Tao,Zhang, Yi,Wu, Xing-Gang,et al. The ratio R(D) and the D-meson distribution amplitude[J]. EUROPEAN PHYSICAL JOURNAL C,2018,78(11):937.
APA Zhong, Tao.,Zhang, Yi.,Wu, Xing-Gang.,Fu, Hai-Bing.,Huang, Tao.,...&黄涛.(2018).The ratio R(D) and the D-meson distribution amplitude.EUROPEAN PHYSICAL JOURNAL C,78(11),937.
MLA Zhong, Tao,et al."The ratio R(D) and the D-meson distribution amplitude".EUROPEAN PHYSICAL JOURNAL C 78.11(2018):937.
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