First observation of the decay D0→K−π+μ+μ−in the ρ0–ωregion of the dimuon mass spectrum
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| Title: | First observation of the decay D0→K−π+μ+μ−in the ρ0–ωregion of the dimuon mass spectrum |
| Author: | LHCb Collaboration Adeva Andany, Bernardo Dosil Suárez, Álvaro Fernández Albor, Víctor Manuel Gallas Torreira, Abraham Antonio García Pardiñas, Julián Lemos Cid, Edgar Lucio Martínez, Miriam Martínez Santos, Diego Plo Casasus, Máximo Prisciandaro, Jessica Romero Vidal, Antonio Saborido Silva, Juan José Sanmartín Sedes, Brais Santamarina Ríos, Cibrán Vázquez Regueiro, Pablo Vázquez Sierra, Carlos Vieites Díaz, María |
| Affiliation: | Universidade de Santiago de Compostela. Departamento de Física de Partículas Universidade de Santiago de Compostela. Instituto Galego de Física de Altas Enerxías (IGFAE) |
| Date of Issue: | 2016 |
| Publisher: | Elsevier |
| Citation: | Aaij, R., Beteta, C. A., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., ... & Ali, S. (2016). First observation of the decay D0→ K− π+ μ+ μ− in the ρ0–ω region of the dimuon mass spectrum. Physics Letters B, 757, 558-567 |
| Abstract: | A study of the decay D0→K−π+μ+μ−is performed using data collected by the LHCb detector in proton–proton collisions at a centre-of-mass energy of 8TeV, corresponding to an integrated luminosity of 2.0fb−1. Decay candidates with muon pairs that have an invariant mass in the range 675–875MeV/c2are considered. This region is dominated by the ρ0and ωresonances. The branching fraction in this range is measured to be B(D0→K− π + μ + μ − ) = (4.17±0.12 (stat)±0.40 (syst))×10−6. This is the first observation of the decay D0→K−π+μ+μ−. Its branching fraction is consistent with the value expected in the Standard Model. |
| Publisher version: | https://doi.org/10.1016/j.physletb.2016.04.029 |
| URI: | http://hdl.handle.net/10347/22436 |
| DOI: | 10.1016/j.physletb.2016.04.029 |
| ISSN: | 0370-2693 |
| E-ISSN: | 1873-2445 |
| Rights: | ©2016 CERN for the benefit of the LHCb Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3. |
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Except where otherwise noted, this item's license is described as ©2016 CERN for the benefit of the LHCb Collaboration. Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.