Charm meson oscillations are observed in a time-dependent analysis of the ratio of D0→K+π-π+π− to D0→K−π+π−π+ decay rates, using data corresponding to an integrated luminosity of 3.0  fb−1 recorded by the LHCb experiment. The measurements presented are sensitive to the phase-space averaged ratio of doubly Cabibbo-suppressed to Cabibbo-favored amplitudes rK3πDand the product of the coherence factor RK3πD and a charm mixing parameter y′K3π. The constraints measured are rK3πD=(5.67±0.12)×10−2, which is the most precise determination to date, and RK3πDy′K3π=(0.3±1.8)×10−3, which provides useful input for determinations of the CP-violating phase γ in B±→DK±, D→K∓π±π∓π± decays. The analysis also gives the most precise measurement of the D0→K+π−π+π− branching fraction, and the first observation of D0–¯D0oscillations in this decay mode, with a significance of 8.2 standard deviations.

First Observation of D0-D-0 Oscillations in D0 →k+π-π+π- Decays and Measurement of the Associated Coherence Parameters / 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., Andreassi, G., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 116:24(2016). [10.1103/PhysRevLett.116.241801]

First Observation of D0-D-0 Oscillations in D0 →k+π-π+π- Decays and Measurement of the Associated Coherence Parameters

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

Abstract

Charm meson oscillations are observed in a time-dependent analysis of the ratio of D0→K+π-π+π− to D0→K−π+π−π+ decay rates, using data corresponding to an integrated luminosity of 3.0  fb−1 recorded by the LHCb experiment. The measurements presented are sensitive to the phase-space averaged ratio of doubly Cabibbo-suppressed to Cabibbo-favored amplitudes rK3πDand the product of the coherence factor RK3πD and a charm mixing parameter y′K3π. The constraints measured are rK3πD=(5.67±0.12)×10−2, which is the most precise determination to date, and RK3πDy′K3π=(0.3±1.8)×10−3, which provides useful input for determinations of the CP-violating phase γ in B±→DK±, D→K∓π±π∓π± decays. The analysis also gives the most precise measurement of the D0→K+π−π+π− branching fraction, and the first observation of D0–¯D0oscillations in this decay mode, with a significance of 8.2 standard deviations.
2016
hadron mixing, bottom baryons, experiments
01 Pubblicazione su rivista::01a Articolo in rivista
First Observation of D0-D-0 Oscillations in D0 →k+π-π+π- Decays and Measurement of the Associated Coherence Parameters / 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., Andreassi, G., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 1092-0145. - 116:24(2016). [10.1103/PhysRevLett.116.241801]
File allegati a questo prodotto
File Dimensione Formato  
PhysRevLett.116.241801.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 958.83 kB
Formato Adobe PDF
958.83 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/11573/1074090
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 43
  • ???jsp.display-item.citation.isi??? 23
social impact