Properties of Z.sup.±./sup..sub.c./sub. (3900) produced in pp¯ collision

0520692 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Abazov, V. M. - Abbott, B. - Acharya, B.S. - Kupčo, Alexander - Lokajíček, Miloš - Royon, C. … celkem 372 autorů
Properties of Z^±_c (3900) produced in pp¯ collision.
Physical Review D. Roč. 100, č. 1 (2019), s. 1-10, č. článku 012005. ISSN 2470-0010. E-ISSN 2470-0029
Grant CEP: GA MŠMT LM2015068
Institucionální podpora: RVO:68378271
Klíčová slova: D0 * Fermilab Tevatron * collisions * hadrons
Obor OECD: Particles and field physics
Impakt faktor: 4.833, rok: 2019
Způsob publikování: Open access

We study the production of the exotic charged charmonium-like state Z±c(3900) in pp¯ collisions through the sequential process ψ(4260)→Z±c(3900)π∓, Z±c(3900)→J/ψπ±. Using the subsample of candidates originating from semi-inclusive weak decays of b-flavored hadrons, we measure the invariant mass and natural width to be M=3902.6+5.2−5.0(stat)+3.3−1.4(syst) MeV and Γ=32+28−21(stat)+26−7(syst) MeV, respectively. We search for prompt production of the Z±c(3900) through the same sequential process. No significant signal is observed, and we set an upper limit of 0.66 at the 95\% credibility level on the ratio of prompt production to the production via b-hadron decays. The study is based on 10.4 fb−1 of pp¯¯¯ collision data collected by the D0 experiment at the Fermilab Tevatron collider.
Trvalý link: http://hdl.handle.net/11104/0305346