TY - JOUR
T1 - Near-threshold DD̅ spectroscopy and observation of a new charmonium state
AU - LHCb Collaboration
AU - Aaij, R.
AU - Abellán Beteta, C.
AU - Adeva, B.
AU - Adinolfi, M.
AU - Aidala, C. A.
AU - Ajaltouni, Z.
AU - Akar, S.
AU - Albicocco, P.
AU - Albrecht, J.
AU - Alessio, F.
AU - Alexander, M.
AU - Alfonso Albero, A.
AU - Alkhazov, G.
AU - Alvarez Cartelle, P.
AU - Alves, A. A.
AU - Amato, S.
AU - Amhis, Y.
AU - An, L.
AU - Anderlini, L.
AU - Andreassi, G.
AU - Andreotti, M.
AU - Andrews, J. E.
AU - Archilli, F.
AU - Arnau Romeu, J.
AU - Artamonov, A.
AU - Artuso, M.
AU - Arzymatov, K.
AU - Aslanides, E.
AU - Atzeni, M.
AU - Audurier, B.
AU - Bachmann, S.
AU - Back, J. J.
AU - Baker, S.
AU - Balagura, V.
AU - Baldini, W.
AU - Bifani, S.
AU - Calladine, R.
AU - Chatzikonstantinidis, G.
AU - Farley, N.
AU - Griffith, P.
AU - Ilten, P.
AU - Lazzeroni, C.
AU - Pescatore, L.
AU - Plews, J.
AU - Popov, D.
AU - Sergi, A.
AU - Slater, M. W.
AU - Watson, N. K.
AU - Williams, T.
AU - Zarebski, K. A.
PY - 2019/7/8
Y1 - 2019/7/8
N2 - 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) → D0D̅0 and X(3842) → D+D−. The mass and the natural width of this state are measured to bemX(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 bemψ(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.
AB - 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) → D0D̅0 and X(3842) → D+D−. The mass and the natural width of this state are measured to bemX(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 bemψ(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.
KW - Charm physics
KW - Hadron-Hadron scattering (experiments)
KW - Heavy quark production
KW - Quarkonium
UR - http://www.scopus.com/inward/record.url?scp=85068784458&partnerID=8YFLogxK
U2 - 10.1007/JHEP07(2019)035
DO - 10.1007/JHEP07(2019)035
M3 - Article
AN - SCOPUS:85068784458
SN - 1126-6708
VL - 2019
JO - Journal of High Energy Physics
JF - Journal of High Energy Physics
IS - 7
M1 - 35
ER -