Near-threshold DD¯ spectroscopy and observation of a new charmonium state; Journal of High Energy Physics; Vol. 2019, iss. 7

Near-threshold DD¯ spectroscopy and observation of a new charmonium state; Journal of High Energy Physics; Vol. 2019, iss. 7

Bibliographic Details
Parent link:Journal of High Energy Physics
Vol. 2019, iss. 7.— 2019.— [35, 22 p.]
Corporate Authors: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа информационных технологий и робототехники
Other Authors: Aaij R. Roel, Beteta C. A. Carlos Abellan, Adeva B. Bernardo, Eydelman S. I. Semen Isaakovich, Kharisova A. E. Anastasiya Evgenjevna, Panshin G. L. Gennady Leonidovich, Strokov S. A. Sergey Aleksandrovich
Summary:Title screen
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)→D0D¯¯¯¯0X(3842)→D0D¯0 and X(3842) → D+D−. The mass and the natural width of this state are measured to bemX(3842)=3842.71±0.16±0.12 MeV/c2,ΓX(3842)=2.79±0.51±0.35 MeV,mX(3842)=3842.71±0.16±0.12 MeV/c2,ΓX(3842)=2.79±0.51±0.35 MeV,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±0.6 MeV/c2,mχ2(3930)=3921.9±0.6±0.2 MeV/c2,Γχ2(3930)=36.6±1.9±0.9 MeV,mψ(3770)=3778.1±0.7±0.6 MeV/c2,mχ2(3930)=3921.9±0.6±0.2 MeV/c2,Γχ2(3930)=36.6±1.9±0.9 MeV, where the first uncertainty is statistical and the second is systematic.
Language:English
Published: 2019
Subjects:
электронный ресурс
труды учёных ТПУ
charm physics
Hadron-Hadron scattering (experiments)
heavy quark production
quarkonium
Online Access:https://doi.org/10.1007/JHEP07(2019)035
Format: Electronic Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=663405

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