TY  - JOUR
AU  - LHCb Collaboration (Aaij, R. et al
AU  - Garcia Martin, L. M.
AU  - Henry, L.
AU  - Jashal, B. K.
AU  - Martinez-Vidal, F.
AU  - Oyanguren, A.
AU  - Remon Alepuz, C.
AU  - Ruiz Vidal, J.
AU  - Sanchez Mayordomo, C.
PY  - 2019
DA  - 2019//
TI  - Near-threshold DD spectroscopy and observation of a new charmonium state
T2  - J. High Energy Phys.
JO  - Journal of High Energy Physics
SP  - 035
EP  - 23pp
VL  - 07
IS  - 7
PB  - Springer
KW  - Charm physics
KW  - Hadron-Hadron scattering (experiments)
KW  - Heavy quark production
KW  - Quarkonium
AB  - Using proton-proton collision data, corresponding to an integrated luminosity of 9 fb, 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) ! D0 D 0 and X(3842) ! D+D. The mass and the natural width of this state are measured to be where the fi rst 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 3 1 3 D 3 charmonium state. In addition, prompt hadroproduction of the (3770) and 2 (3930) states is observed for the fi rst time, and the parameters of these states are measured to be m (3770) = 3778 : 1 0 : 7 0 : 6MeV where the first uncertainty is statistical and the second is systematic.
SN  - 1029-8479
UR  - https://arxiv.org/abs/1903.12240
UR  - https://doi.org/10.1007/JHEP07(2019)035
DO  - 10.1007/JHEP07(2019)035
LA  - English
N1  - WOS:000475573300001
ID  - LHCbCollaborationAaij_etal2019
ER  -