RT Journal Article
T1 First observation of the decay D0→K−π+μ+μ−in the ρ0–ωregion of the dimuon mass spectrum
A1 LHCb Collaboration, 
A1 Adeva Andany, Bernardo
A1 Dosil Suárez, Álvaro
A1 Fernández Albor, Víctor Manuel
A1 Gallas Torreira, Abraham Antonio
A1 García Pardiñas, Julián
A1 Lemos Cid, Edgar
A1 Lucio Martínez, Miriam
A1 Martínez Santos, Diego
A1 Plo Casasus, Máximo
A1 Prisciandaro, Jessica
A1 Romero Vidal, Antonio
A1 Saborido Silva, Juan José
A1 Sanmartín Sedes, Brais
A1 Santamarina Ríos, Cibrán
A1 Vázquez Regueiro, Pablo
A1 Vázquez Sierra, Carlos
A1 Vieites Díaz, María
AB 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 beB(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.
PB Elsevier
SN 0370-2693
YR 2016
FD 2016
LK http://hdl.handle.net/10347/22436
UL http://hdl.handle.net/10347/22436
LA eng
NO 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
DS Minerva
RD 24 abr 2026