We perform a search for near-threshold Ξ0bresonances decaying to Ξbπ+in a sample of proton-proton collision data corresponding to an integrated luminosityof 3 fb−1collected by the LHCb experiment. We observe one resonant state, with thefollowing properties:m(Ξ∗0b) − m(Ξ−b) − m(π+) = 15.727 ± 0.068 (stat) ± 0.023 (syst) MeV/c2,Γ(Ξ∗0b) = 0.90 ± 0.16 (stat) ± 0.08 (syst) MeV.This confirms the previous observation by the CMS collaboration. The state is consistentwith the JP = 3/2+ Ξ∗0bresonance expected in the quark model. This is the most precisedetermination of the mass and the first measurement of the natural width of this state. Wehave also measured the ratioσ(pp → Ξ∗0b X)B(Ξ∗0b → Ξ−bπ+)σ(pp → Ξ−b X)= 0.28 ± 0.03 (stat.) ± 0.01 (syst.).

Measurement of the properties of the Ξ<inf>b</inf>∗0baryon / The LHCb, C., 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., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2016:5(2016). [10.1007/JHEP05(2016)161]

Measurement of the properties of the Ξb∗0baryon

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

Abstract

We perform a search for near-threshold Ξ0bresonances decaying to Ξbπ+in a sample of proton-proton collision data corresponding to an integrated luminosityof 3 fb−1collected by the LHCb experiment. We observe one resonant state, with thefollowing properties:m(Ξ∗0b) − m(Ξ−b) − m(π+) = 15.727 ± 0.068 (stat) ± 0.023 (syst) MeV/c2,Γ(Ξ∗0b) = 0.90 ± 0.16 (stat) ± 0.08 (syst) MeV.This confirms the previous observation by the CMS collaboration. The state is consistentwith the JP = 3/2+ Ξ∗0bresonance expected in the quark model. This is the most precisedetermination of the mass and the first measurement of the natural width of this state. Wehave also measured the ratioσ(pp → Ξ∗0b X)B(Ξ∗0b → Ξ−bπ+)σ(pp → Ξ−b X)= 0.28 ± 0.03 (stat.) ± 0.01 (syst.).
2016
Spectroscopy B physics Particle and resonance production Hadron-Hadron scattering (experiments)
01 Pubblicazione su rivista::01a Articolo in rivista
Measurement of the properties of the Ξ<inf>b</inf>∗0baryon / The LHCb, C., 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., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1126-6708. - 2016:5(2016). [10.1007/JHEP05(2016)161]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1074089
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