Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector between 2011 and 2018, a new narrow charmonium state, the X(3842) resonance, is observed in the decay modes X (3842) → DD¯ and X(3842) → D+D−. The mass and the natural width of this state are measured to be mX(3842)=3842.71±0.16±0.12MeV/c2,ΓX(3842)=2.79±0.51±0.35MeV, where the first uncertainty is statistical and the second is systematic. The observed mass and narrow natural width suggest the interpretation of the new state as the unobserved (spin-3 ψ3 13D3) charmonium state. In addition, prompt hadroproduction of the ψ(3770) and χ2(3930) states is observed for the first time, and the parameters of these states are measured to be mψ(3770)=3778.1±0.7±0.6MeV/c2,mχ2(3930)=3921.9±0.6±0.2MeV/c2,Γχ2(3930)=36.6±1.9±0.9MeV, where the first uncertainty is statistical and the second is systematic.[Figure not available: see fulltext.].

Near-threshold D(Formula presented.) spectroscopy and observation of a new charmonium state / Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Aidala, C.A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2019:7(2019). [10.1007/JHEP07(2019)035]

Near-threshold D(Formula presented.) spectroscopy and observation of a new charmonium state

Capriotti L.;Casse G.;Kazeev N.;Sarti A.;Sciubba A.;
2019

Abstract

Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb−1, collected with the LHCb detector between 2011 and 2018, a new narrow charmonium state, the X(3842) resonance, is observed in the decay modes X (3842) → DD¯ and X(3842) → D+D−. The mass and the natural width of this state are measured to be mX(3842)=3842.71±0.16±0.12MeV/c2,ΓX(3842)=2.79±0.51±0.35MeV, where the first uncertainty is statistical and the second is systematic. The observed mass and narrow natural width suggest the interpretation of the new state as the unobserved (spin-3 ψ3 13D3) charmonium state. In addition, prompt hadroproduction of the ψ(3770) and χ2(3930) states is observed for the first time, and the parameters of these states are measured to be mψ(3770)=3778.1±0.7±0.6MeV/c2,mχ2(3930)=3921.9±0.6±0.2MeV/c2,Γχ2(3930)=36.6±1.9±0.9MeV, where the first uncertainty is statistical and the second is systematic.[Figure not available: see fulltext.].
2019
Charm physics; Hadron-Hadron scattering (experiments); Heavy quark production; Quarkonium
01 Pubblicazione su rivista::01a Articolo in rivista
Near-threshold D(Formula presented.) spectroscopy and observation of a new charmonium state / Aaij, R., Abellan Beteta, C., Adeva, B., Adinolfi, M., Aidala, C.A., Ajaltouni, Z., Akar, S., Albicocco, P., Albrecht, J., Alessio, F., Alexander, M., Alfonso Albero, A., Alkhazov, G., Alvarez Cartelle, P., Alves, A.A., Amato, S., Amhis, Y., An, L., Anderlini, L., Andreassi, G., et al.. - In: JOURNAL OF HIGH ENERGY PHYSICS. - ISSN 1029-8479. - 2019:7(2019). [10.1007/JHEP07(2019)035]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1310065
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