University of Birmingham First observation and amplitude analysis of the B-D+K-- decay
University of Birmingham First observation and amplitude analysis of the B-D+K-- decay
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DOI:
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
S. Farry;R. Fay;D. Ferguson;V. F. Albor;F. Rodrigues;M. Ferro-Luzzi;S. Filippov;M. Fiore
中科院分区:
文献类型:
--
作者:
S. Farry;R. Fay;D. Ferguson;V. F. Albor;F. Rodrigues;M. Ferro-Luzzi;S. Filippov;M. Fiore
The B − → D þ K − π − decay is observed in a data sample corresponding to 3 . 0 fb − 1 of pp collision data recorded by the LHCb experiment during 2011 and 2012. Its branching fraction is measured to be B ð B − → D þ K − π − Þ ¼ ð 7 . 31 (cid:2) 0 . 19 (cid:2) 0 . 22 (cid:2) 0 . 39 Þ × 10 − 5 where the uncertainties are statistical, systematic and from the branching fraction of the normalization channel B − → D þ π − π − , respectively. An amplitude analysis of the resonant structure of the B − → D þ K − π − decay is used to measure the contributions from quasi-two-body B − → D (cid:3) 0 ð 2400 Þ 0 K − , B − → D (cid:3) 2 ð 2460 Þ 0 K − , and B − → D (cid:3) J ð 2760 Þ 0 K − decays, as well as from nonresonant sources. The D (cid:3) J ð 2760 Þ 0 resonance is determined to have spin 1.