We perform a search for near-threshold Ξb0 resonances decaying to Ξb− π+ in a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb^−1 collected by the LHCb experiment. We observe one resonant state, with the following properties: m(Ξb∗0) − m(Ξb−) − m(π+) = 15.727 ± 0.068(stat) ± 0.023(syst) MeV/c2, Γ(Ξb∗0) = 0.90 ± 0.16(stat) ± 0.08(syst) MeV. This confirms the previous observation by the CMS collaboration. The state is consistent with the J^P = 3/2^+ Ξb∗0 resonance expected in the quark model. This is the most precise determination of the mass and the first measurement of the natural width of this state. We have also measured the ratio σ(pp → Ξb∗0 X) B(Ξb∗0 → Ξb− π+)/σ(pp → Ξb− X) = 0.28 ± 0.03(stat.) ± 0.01(syst.).

Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2016). Measurement of the Properties of the Ξb∗0 Baryon. JOURNAL OF HIGH ENERGY PHYSICS, 2016(5), 0-18 [10.1007/JHEP05(2016)161].

Measurement of the Properties of the Ξb∗0 Baryon

BETTI, FEDERICO;Capriotti, L.;CARBONE, ANGELO;FERRARI, FABIO;GALLI, DOMENICO;MUSSINI, MANUEL;PATRIGNANI, CLAUDIA;PERAZZINI, STEFANO;VAGNONI, VINCENZO MARIA;ZANGOLI, MARIA;ZUCCHELLI, STEFANO;
2016

Abstract

We perform a search for near-threshold Ξb0 resonances decaying to Ξb− π+ in a sample of proton-proton collision data corresponding to an integrated luminosity of 3 fb^−1 collected by the LHCb experiment. We observe one resonant state, with the following properties: m(Ξb∗0) − m(Ξb−) − m(π+) = 15.727 ± 0.068(stat) ± 0.023(syst) MeV/c2, Γ(Ξb∗0) = 0.90 ± 0.16(stat) ± 0.08(syst) MeV. This confirms the previous observation by the CMS collaboration. The state is consistent with the J^P = 3/2^+ Ξb∗0 resonance expected in the quark model. This is the most precise determination of the mass and the first measurement of the natural width of this state. We have also measured the ratio σ(pp → Ξb∗0 X) B(Ξb∗0 → Ξb− π+)/σ(pp → Ξb− X) = 0.28 ± 0.03(stat.) ± 0.01(syst.).
2016
Aaij, R., Abellán Beteta, C., Adeva, B., Adinolfi, M., Ajaltouni, Z., Akar, S., et al. (2016). Measurement of the Properties of the Ξb∗0 Baryon. JOURNAL OF HIGH ENERGY PHYSICS, 2016(5), 0-18 [10.1007/JHEP05(2016)161].
Aaij, R.; Abellán Beteta, C.; Adeva, B.; Adinolfi, M.; Ajaltouni, Z.; Akar, S.; Albrecht, J.; Alessio, F.; Alexander, M.; Ali, S.; Alkhazov, G.; Alvar...espandi
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/540715
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