Title

First Observation of Bs -> D_{s2}^{*+} X mu nu Decays

Author(s)/Creator(s)

Raymond Mountain, Syracuse UniversityFollow
Marina Artuso, Syracuse UniversityFollow
S. Blusk, Syracuse UniversityFollow
Alessandra Borgia, Syracuse UniversityFollow

Document Type

Article

Date

3-9-2011

Language

English

Disciplines

Physics

Description/Abstract

Using data collected with the LHCb detector in proton-proton collisions at a centre-of-mass energy of 7 TeV, the semileptonic decays Bs -> Ds+ X mu nu and Bs -> D0 K+ X mu nu are detected. Two structures are observed in the D0 K+ mass spectrum at masses consistent with the known D^+_{s1}(2536) and D^{*+}_{s2}(2573) mesons. The measured branching fractions relative to the total Bs semileptonic rate are B(Bs -> D_{s2}^{*+} X mu nu)/B(Bs -> X mu nu)= (3.3\pm 1.0\pm 0.4)%, and B(Bs -> D_{s1}^+ X munu)/B(Bs -> X mu nu)= (5.4\pm 1.2\pm 0.5)%, where the first uncertainty is statistical and the second is systematic. This is the first observation of the D_{s2}^{*+} state in Bs decays; we also measure its mass and width.

Additional Information

8 pages 2 figures. Published in Physics Letters B More information at http://arxiv.org/abs/1102.0348

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Recommended Citation

Mountain, Raymond; Artuso, Marina; Blusk, S.; and Borgia, Alessandra, "First Observation of Bs -> D_{s2}^{*+} X mu nu Decays" (2011). Physics - All Scholarship. 380.
https://surface.syr.edu/phy/380

Source

Harvested from Arxiv.org

Creative Commons License

This work is licensed under a Creative Commons Attribution 3.0 License.