Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5494348 | Nuclear Physics B | 2017 | 19 Pages |
Abstract
In this paper, we studied the B(s)â(D(s),D¯(s))Ïâ(D(s),D¯(s))ÏÏ decays by employing a framework for the quasi-two-body decays in the perturbative QCD (PQCD) factorization approach. We use the two-pion distribution amplitudes ΦÏÏ, which contains both resonant and nonresonant contributions from the pion pair, to describe the final state interactions (FSIs) between the pions in the resonant region. We found that (a) for all considered decays, the PQCD predictions for their branching ratios based on the quasi-two-body and the two-body framework agree well with each other due to B(ÏâÏÏ)â100%; For B+âD0¯Ï+âD0¯Ï+Ï0 and other four considered decay modes, the PQCD predictions do agree well with the measured values within errors; (b) the great difference between the PQCD predictions for B(BâD¯ÏâD¯ÏÏ) and B(BâDÏâDÏÏ) can be understood by the strong CKM suppression factor RCKMâ3Ã10â4; (c) for the BsâDÏâDÏÏ and BsâD¯ÏâD¯ÏÏ decays, however, the PQCD predictions of Rs1â0.13 and Rs2â0.14 do agree very well with the moderate CKM suppression factor RCKMsâ0.14; and (d) the PQCD predictions for the ratios RDÏ and the strong phase difference cosâ¡Î´DÏ of the three BâDÂ¯Ï decay modes agree well with the LHCb measurements within one standard deviation.
Related Topics
Physical Sciences and Engineering
Mathematics
Mathematical Physics
Authors
Ai-Jun Ma, Ya Li, Wen-Fei Wang, Zhen-Jun Xiao,