A proton-proton collision data sample, corresponding to an integrated luminosity of 3  fb−1 collected by LHCb at √s=7 and 8 TeV, is used to reconstruct 63±9 Ω−b→Ω0cπ−, Ω0c→pK−K−π+ decays. Using the Ξ−b→Ξ0cπ−, Ξ0c→pK−K−π+ decay mode for calibration, the lifetime ratio and the absolute lifetime of the −b baryon are measured to be τΩ−b/τΞ−b=1.11±0.16±0.03, τΩ−b=1.78±0.26±0.05±0.06  ps, where the uncertainties are statistical, systematic and from the calibration mode (for τΩ−b only). A measurement is also made of the mass difference, mΩ−b−mΞ−b, and the corresponding Ω−b mass, which yields mΩ−b−mΞ−b=247.4±3.2±0.5  MeV/c2, mΩ−b=6045.1±3.2±0.5±0.6  MeV/c2. These results are consistent with previous measurements.

Measurement of the mass and lifetime of the Ωb- baryon / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., 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., Andreotti, M., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 93:9(2016). [10.1103/PhysRevD.93.092007]

Measurement of the mass and lifetime of the Ωb- baryon

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

Abstract

A proton-proton collision data sample, corresponding to an integrated luminosity of 3  fb−1 collected by LHCb at √s=7 and 8 TeV, is used to reconstruct 63±9 Ω−b→Ω0cπ−, Ω0c→pK−K−π+ decays. Using the Ξ−b→Ξ0cπ−, Ξ0c→pK−K−π+ decay mode for calibration, the lifetime ratio and the absolute lifetime of the −b baryon are measured to be τΩ−b/τΞ−b=1.11±0.16±0.03, τΩ−b=1.78±0.26±0.05±0.06  ps, where the uncertainties are statistical, systematic and from the calibration mode (for τΩ−b only). A measurement is also made of the mass difference, mΩ−b−mΞ−b, and the corresponding Ω−b mass, which yields mΩ−b−mΞ−b=247.4±3.2±0.5  MeV/c2, mΩ−b=6045.1±3.2±0.5±0.6  MeV/c2. These results are consistent with previous measurements.
2016
Hadron-Hadron scattering (experiments), Particle and resonance production, proton-proton scattering, QCD, Quarkonium
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the mass and lifetime of the Ωb- baryon / Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., 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., Andreotti, M., et al.. - In: PHYSICAL REVIEW D. - ISSN 2470-0010. - 93:9(2016). [10.1103/PhysRevD.93.092007]
File allegati a questo prodotto
File Dimensione Formato  
PhysRevD.93.092007.pdf

accesso aperto

Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 425.56 kB
Formato Adobe PDF
425.56 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/11573/1074097
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 28
  • ???jsp.display-item.citation.isi??? 18
social impact