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 8 TeV, corresponding to an integrated luminosity of 2.0 fb−1. Decay candidates with muon pairs that have an invariant mass in the range 675–875 MeV/c2 are considered. This region is dominated by the ρ0 and ω resonances. 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.

First observation of the decay D0→K-π+μ+μ-in the ρ0-ω region of the dimuon mass spectrum / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 757:(2016), pp. 558-567. [10.1016/j.physletb.2016.04.029]

First observation of the decay D0→K-π+μ+μ-in the ρ0-ω region of the dimuon mass spectrum

Capriotti, L.;Casse, G.;Sarti, A.;Sciubba, A.;
2016

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 8 TeV, corresponding to an integrated luminosity of 2.0 fb−1. Decay candidates with muon pairs that have an invariant mass in the range 675–875 MeV/c2 are considered. This region is dominated by the ρ0 and ω resonances. 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.
2016
Branching fraction, Hadron-Hadron scattering (experiments), QCD
01 Pubblicazione su rivista::01a Articolo in rivista
First observation of the decay D0→K-π+μ+μ-in the ρ0-ω region of the dimuon mass spectrum / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Affolder, A., Ajaltouni, Z., Akar, S., Albrecht, J., Alessio, F., Alexander, M., Ali, S., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amerio, S., Amhis, Y., An, L., Anderlini, L., Anderson, J., et al.. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 757:(2016), pp. 558-567. [10.1016/j.physletb.2016.04.029]
File allegati a questo prodotto
File Dimensione Formato  
1-s2.0-S0370269316301022-main (1).pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 698.85 kB
Formato Adobe PDF
698.85 kB Adobe PDF

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074254
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 33
  • ???jsp.display-item.citation.isi??? 20
social impact